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  • Inorganic Chemistry  (1,631)
  • Fluid Mechanics and Thermodynamics  (24)
  • Seismicity  (13)
  • Humans
  • SPACE SCIENCES
  • 1940-1944  (1,668)
Collection
Keywords
Years
Year
  • 1
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    In:  Bull. Seism. Soc. Am., Milano, Gustav Fischer, vol. 31, no. 6, pp. 263-302, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1941
    Keywords: Tectonics ; Seismicity ; Seismology ; BSSA
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  • 2
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    In:  Trans., Am. Geophys. Union, Milano, Gustav Fischer, vol. 24, no. 6, pp. 95-96, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1943
    Keywords: Seismology ; Seismicity ; EOS
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  • 3
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    California Institute of Technology Pasadena
    In:  Seismological Laboratory Bulletin, Milano, California Institute of Technology Pasadena, vol. 1942, no. 6, pp. 115, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1944
    Keywords: Seismology ; Earthquake catalog ; Seismicity
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  • 4
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    In:  Bull. Seism. Soc. Am., Milano, California Institute of Technology Pasadena, vol. 34, no. 6, pp. 185-188, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1944
    Keywords: Seismology ; Seismicity ; BSSA
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  • 5
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    In:  Bull. Geol. Soc. Am., Milano, Gustav Fischer, vol. 51, no. 6, pp. 1958, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1940
    Keywords: Seismicity
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  • 6
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    In:  Bull. Geol. Soc. Am., Milano, Gustav Fischer, vol. 52, no. 6, pp. 1950, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1941
    Keywords: Tectonics ; Seismicity ; Seismology
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  • 7
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    In:  Trans., Am. Geophys. Union, Milano, Gustav Fischer, vol. 22, no. 6, pp. 556-558, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1941
    Keywords: Tectonics ; Seismicity ; EOS
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  • 8
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    California Institute of Technology Pasadena
    In:  Seismological Laboratory Bulletin, Milano, California Institute of Technology Pasadena, vol. 1941, no. 6, pp. 98, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1944
    Keywords: Seismology ; Earthquake catalog ; Seismicity
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  • 9
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    California Institute of Technology Pasadena
    In:  Seismological Laboratory Bulletin, Milano, California Institute of Technology Pasadena, vol. 1943, no. 6, pp. 140, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1944
    Keywords: Seismology ; Earthquake catalog ; Seismicity
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  • 10
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    Geol. Soc. Am.
    In:  New York, 7 + 131 pp., Geol. Soc. Am., vol. 34, no. XVI:, pp. 385-389, (ISBN 0-12-305355-2)
    Publication Date: 1941
    Keywords: Seismology ; Seismicity ; Review article
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  • 11
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    University of California Press
    In:  Pacific Science Association, 6th Congress Proceedings, vol. 1, Toronto, University of California Press, vol. 10, no. GL-TR-89-0230, pp. 149-150, (ISBN 3-933346-037)
    Publication Date: 1940
    Keywords: Seismology ; Seismicity ; Hypocentral depth
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  • 12
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    In:  Bull. Seism. Soc. Am., Oxford and Edinburgh, Blackwell Scientific Publications, vol. 31, no. 19, pp. 187-224, pp. 1484, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1941
    Keywords: Seismology ; Seismicity ; BSSA
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  • 13
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    In:  8th American Science Congress Washington 1940, Proceedings, vol. 4, Toronto, University of California Press, vol. 10, no. GL-TR-89-0230, pp. 455, (ISBN 3-933346-037)
    Publication Date: 1942
    Keywords: Seismicity
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  • 14
    Publication Date: 2019-06-28
    Description: Experimental results of tests made at the Langley Memorial Aeronautical Laboratory are presented to show how heat-transfer coefficients can he increased by a method utilizing the high rate of heat transfer known to exist on any heat-transfer surface in the region adjacent to the edge on which the cooling or heating fluid impinges. The results show that, for the same pressure drop, the average surface heat-transfer.coefficient can be increased 50 to 100 percent when a cooling surface having a length of four inches in the direction of fluid flow is cut to form twenty fins with a length of 0.2 inch in the direction of fluid flow and the fins are sharpened and staggered in the air stream. The percentage of increase in the surface heat-transfer coefficient obtained as a result of shortening the length of the cooling surface varies with the pressure drop of the cooling fluid in passing the surface, the increase being largest when small pressure drop is used and smallest when high pressure drop is used.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-WR-L-239 , NACA-ARR-3K01
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  • 15
    Publication Date: 2019-06-28
    Description: An analysis is made to simplify pressure-drop calculations for nonadiabatic and adiabatic friction flow of air in smooth cylindrical tubes when the density changes due to heat transfer and pressure drop are appreciable. Solutions of the equation of motion are obtained by the use of Reynolds' analogy between heat transfer and skin friction. Charts of the solutions are presented for making pressure-drop calculations. A technique of using the charts to determine the position of a normal shock in a tube is described.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-WR-L-179 , NACA-ARR-L4C16
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  • 16
    Publication Date: 2018-06-05
    Description: A study of a flow through a straight converging-diverging nozzle of simple design has been made preliminary to studies of other supersonic flows. The diverging part of the nozzle was designed by the Prandtl-Busemann method to give a uniform pressure at its exit of 0.298 times the initial total head, that is, to give a Mach number of 1.436. Schlieren photographs of the flow and pressure-distribution measurements along the diverging part of the nozzle were made. A comparison of the theory with these measurements is presented.
    Keywords: Fluid Mechanics and Thermodynamics
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  • 17
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    In:  CASI
    Publication Date: 2019-06-28
    Description: No abstract available
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-WR-E-102
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  • 18
    Publication Date: 2019-07-12
    Description: A discussion of the interaction between normal shocks and boundary layers on the basis of experimental evidence obtained in studies of supersonic flows in passages is given. The investigation was made as a result of the inability of the existing normal-shock theory to explain phenomena involving normal shocks that occurred in the presence of boundary layers. Assumptions with regard to the character of the effects of interaction between boundary layer and normal shock are proposed; these assumptions seem to give good agreement with certain experimental results.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-CB-4A27
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  • 19
    Publication Date: 2019-08-15
    Description: The differential equation of Chaplygin's jet problem is utilized to give a systematic development of particular solutions of the hodograph flow equations, which extends the treatment of Chaplygin into the supersonic range and completes the set of particular solutions. The particular solutions serve to place on a reasonable basis the use of velocity correction formulas for the comparison of incompressible and compressible flows. It is shown that the geometric-mean type of velocity correction formula introduced in part I has significance as an over-all type of approximation in the subsonic range. A brief review of general conditions limiting the potential flow of an adiabatic compressible fluid is given and application is made to the particular solutions, yielding conditions for the existence of singular loci in the supersonic range. The combining of particular solutions in accordance with prescribed boundary flow conditions is not treated in the present paper.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA/TR-790
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  • 20
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    In:  CASI
    Publication Date: 2019-08-15
    Description: A brief summary of the contents of this paper is presented here. In part I the differential equations of the problem of a gas flow in two dimensions is derived and the particular integrals by which the problem on jets is solved are given. Use is made of the same independent variables as Molenbroek used, but it is found to be more suitable to consider other functions. The stream function and velocity potential corresponding to the problem are given in the form of series. The investigation on the convergence of these series in connection with certain properties of the functions entering them forms the subject of part II. In part III the problem of the outflow of a gas from an infinite vessel with plane walls is solved. In part IV the impact of a gas jet on a plate is considered and the limiting case where the jet expands to infinity changing into a gas flow is taken up in more detail. This also solved the equivalent problem of the resistance of a gaseous medium to the motion of a plate. Finally, in part V, an approximate method is presented that permits a simpler solution of the problem of jet flows in the case where the velocities of the gas (velocities of the particles in the gas) are not very large.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1063 , Scientific Memoirs; 1-121
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  • 21
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    In:  CASI
    Publication Date: 2019-07-13
    Description: One of the problems of modern cavitation research is the experimental determination of the wing loads on airfoils during cavitation. Such experiments were made on various airfoils with the support of the naval ministry at the Kaiser Wilhelm Institute for Flow Research at Goettingen.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1060 , Hydromechanical Problems of Ship Propulsion; May 18, 1932 - May 19, 1932; Hamburg; Germany
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  • 22
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    In:  CASI
    Publication Date: 2019-07-13
    Description: The,theory of heat.transfer from a solid body to a liquid stream could he presented previously** only with limiting assumptions about the movement of the fluid (potential flow, laminar frictional flow). (See references 1, 2, and 3). For turbulent flow, the most important practical case, the previous theoretical considerations did not go beyond dimensionless formulas and certain conclusions as to the analogy between the friction factor and the unit thermal conductance, (See references 4, 5, 6, and 7,) In order to obtain numerical results, an experimental treatment of the problem was resorted to, which gave rise to numerous investigations because of the importance of this problem in many branches of technology. However, the results of these investigations frequently deviate from one another. The experimental results are especially dependent upon the overall dimensions and the specific proportions of the equipment. In the present work, the attempt will be made to develop systematically the theory of the heat transfer and of the dependence of the unit thermal conductance upon shape and dimensions, using as a basis the velocity distribution for turbulent flow set up by Prandtl and Von Karman.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1068 , Zeitschrift fuer Angewandte Mathematik und Mechanik; 1; 4; 268-290
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  • 23
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    In:  CASI
    Publication Date: 2019-07-13
    Description: The heat transfer accompanying turbulent flow in tubes has been treated by a new theory of wall turbulence, and a formula for smooth tubes has been derived which is asymptotic at Re approaches infinity. It agrees very well with the data available to date. The formula also holds for the flow along a flat plate if lambda is based on the velocity far away. For rough tubes, the unit conductance is shown to be a function of kv*/upsilon; the two empirical constants (delta(r), n) which appear in equation (52) cannot yet be determined because of lack of experimental data.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1037 , Forschung auf dem Gebiete des Ingenieurwesens, Bd. 11; 11; 4; 149-158
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  • 24
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    In:  CASI
    Publication Date: 2019-07-13
    Description: The "general Prandtl number" Pr(exp 1) - A(sub q)/A Pr, aside from the Reynolds number determines the ratio of turbulent to molecular heat transfer, and the temperature distribution in turbulent friction layers. A(sub q) = exchange coefficient for heat; A = exchange coefficient for momentum transfer. A formula is derived from the equation defining the general Prandtl number which describes the temperature as a function of the velocity. For fully developed thermal boundary layers all questions relating to heat transfer to and from incompressible fluids can be treated in a simple manner if the ratio of the turbulent shear stress to the total stress T(sub t)/T in the layers near the wall is known, and if the A(sub q)/A can be regarded as independent of the distance from the wall. The velocity distribution across a flat smooth channel and deep into the laminar sublayer was measured for isothermal flow to establish the shear stress ratio T(sub t)/T and to extend the universal wall friction law. The values of T(sub t)/T which resulted from these measurements can be approximately represented by a linear function of the velocity in the laminar-turbulent transition zone. The effect of the temperature relationship of the material values on the flow near the wall is briefly analyzed. It was found that the velocity at the laminar boundary (in contrast to the thickness of the laminar layer) is approximately independent of the temperature distribution. The temperature gradient at the wall and the distribution of temperature and heat flow in the turbulent friction layers were calculated on the basis of the data under two equations. The derived formulas and the figures reveal the effects of the Prandtl number, the Reynolds number, the exchange quantities and the temperature relationship of the material values.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1047 , Zeitschrift fuer Angewandte Mathematik und Mechanik; 20; 6; 297-328
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  • 25
    Publication Date: 2019-07-13
    Description: Problems of hydraulic flow resistance and heat transfer for streams with velocities comparable with acoustic have present great importance for various fields of technical science. Especially, they have great importance for the field of heat transfer in designing and constructing boilers.of the "Velox" type. In this article a description of experiments and their results as regards definition of the laws of heat transfer in differential form for high velocity air streams inside smooth tubes are given.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1054 , Journal of Technical Physics; 9; 9; 808-818
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  • 26
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    In:  CASI
    Publication Date: 2019-07-13
    Description: The effect of cyclic gas pressure variations on the periodic heat transfer at a flat wall is theoretically analyzed and the differential equation describing the process and its solution for relatively. Small pressure fluctuations developed, thus explaining the periodic heat cycle between gas and wall surface. The processes for pure harmonic pressure and temperature oscillations, respectively, in the gas space are described by means of a constant heat transfer coefficient and the equally constant phase angle between the appearance of the maximum values of the pressure and heat flow most conveniently expressed mathematically in the form of a complex heat transfer coefficient. Any cyclic pressure oscillations, can be reduced by Fourier analysis to harmonic oscillations, which result in specific, mutual relationships of heat-transfer coefficients and phase angles for the different harmonics.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1048 , Forschung auf de Gebiete des Ingenieurwesens; 11; 2; 67-75
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  • 27
    Publication Date: 2019-07-13
    Description: In an attempt to follow the time rate of change of the processes in turbulent flows by quantitative measurements the measurement of the pressure is often beset with insuperable difficulties for the reason that the speeds and hence the pressures to be measured are often very small. On the other hand, the measurement of very small pressures requires, at least, considerable time, so that the follow-up of periodically varying processes is as goad as impossible. In order to obviate these difficulties a method, suggested by Prof. Prandtl, has been developed by which the pressure distribution is simply determined from the photographic flow picture. This method is described and proved on a worked-out example. It was found that quantitatively very satisfactory results can be achieved.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1039 , Ingenieur-Archives; 6; 1; 34-50
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  • 28
    Publication Date: 2019-07-13
    Description: A method for recording the local heat-transfer coefficients on bodies in flow was developed. The cylinder surface was kept at constant temperature by the condensation of vapor except for a narrow strip which is heated separately to the same temperature by electricity. The heat-transfer coefficient at each point was determined from the electric heat output and the temperature increase. The distribution of the heat transfer along the circumference of cylinders was recorded over a range of Reynolds numbers of from 5000 to 426,000. The pressure distribution was measured at the same time. At Reynolds numbers up to around 100,000 high maximums of the heat transfer occurred in the forward stagnation point at and on the rear side at 180C, while at around 80 the heat-transfer coefficient on both sides of the cylinder behind the forward stagnation point manifested distinct minimums. Two other maximums occurred at around 115 C behind the forward stagnation point between 170,000 and 426,000. At 426,000 the heat transfer at the location of those maximums was almost twice as great as in the forward stagnation point, and the rear half of the cylinder diffused about 60 percent of the entire heat, The tests are compared with the results of other experimental and theoretical investigations.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1050 , Forschung auf dem Gebiete des Ingenieurwesens; 12; 2; 65-73
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  • 29
    Publication Date: 2019-07-11
    Description: In the present report an investigation is made on a flat plate in a two-dimensional compressible flow of the effect of compressibility and heating on the turbulent frictional drag coefficient in the boundary layer of an airfoil or wing radiator. The analysis is based on the Prandtl-Karman theory of the turbulent boundary later and the Stodola-Crocco, theorem on the linear relation between the total energy of the flow and its velocity. Formulas are obtained for the velocity distribution and the frictional drag law in a turbulent boundary later with the compressibility effect and heat transfer taken into account. It is found that with increase of compressibility and temperature at full retardation of the flow (the temperature when the velocity of the flow at a given point is reduced to zero in case of an adiabatic process in the gas) at a constant R (sub x), the frictional drag coefficient C (sub f) decreased, both of these factors acting in the same sense.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1053 , Report of the Central Aero-Hydrodynamical Institute, Moscow; Rept-321
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  • 30
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    In:  CASI
    Publication Date: 2019-07-11
    Description: In the present report the theory of free turbulence propagation and the boundary layer theory are developed for a plane-parallel free stream of a compressible fluid. In constructing the theory use was made of the turbulence hypothesis by Taylor (transport of vorticity) which gives best agreement with test results for problems involving heat transfer in free jets.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1058 , Report of the Central Aero-Hydrodynamical Inst., Moscow; Rept-377
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  • 31
    Publication Date: 2019-07-11
    Description: The Reynolds law of heat transfer from a wall to a turbulent stream is extended to the case of flow of a compressible gas at high speeds. The analysis is based on the modern theory of the turbulent boundary layer with laminar sublayer. The investigation is carried out for the case of a plate situated in a parallel stream. The results are obtained independently of the velocity distribution in the turbulent boundar layer.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1032 , Rept-240
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  • 32
    Publication Date: 2019-07-12
    Description: A mathematical analysis of radiator design has been made. The volume of the radiator using least total power has been expressed in a single formula which shows that the optimum radiator volume is independent of the shape of the radiator and which makes possible the construction of design tables that give the optimum radiator volume per 100-horsepower heat dissipation as a function of the speed, of the altitude, and of one parameter involving characteristics of the airplane. Although, for a given set of conditions, the radiator volume using the least total power is fixed, the frontal area, or the length of the radiator needs to be separately specified in order to satisfy certain other requirement such as the ability to cool with the pressure drop available while the airplane is climbing. In order to simplify the specification for the shape of the radiator and in order to reduce the labor involved in calculating the detailed performance of radiators, generalized design curves have been developed for determining the pressure drop, the mass flow of air, and the power expended in overcoming the cooling drag of a radiator from the physical dimensions of the radiator. In addition, a table is derived from these curves, which directly gives the square root of the pressure drop required for ground cooling as a function of the radiator dimensions, of the heat dissipation and of the available temperature difference. Typical calculations using the tables of optimum radiator volume and the design curves are given. The jet power that can be derived from the heated air is proportional to the heat dissipation and is approximately proportional to the square of the airplane speed and to the reciprocal of the absolute temperature of the atmosphere. A table of jet power, per 100 horsepower of heat dissipation at various airplane speeds and altitudes is presented.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-ACR-213 , NACA-SR-213
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  • 33
    Publication Date: 2019-07-12
    Description: A method is presented of comparing the performance, weight, and general dimensional characteristics of inter-coolers. The performance and dimensional characteristics covered in the comparisons are cooling effectiveness, pressure drops and weight flows of the charge and cooling air, power losses, volume, frontal area, and width. A method of presenting intercooler data is described in which two types of charts are plotted; (1) A performance chart setting forth all the important characteristics of a given intercooler and (2) a replot of these characteristics for a number of intercoolers intended to assist in making a selection to satisfy a given set of installation conditions. The characteristics of commercial intercoolers obtained from manufacturers' data and of some computed designs are presented on this basis. A standard test procedure and instrumentation are suggested whereby comparable data may be obtained by different testing organizations.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-SR-192
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  • 34
    Publication Date: 2019-08-15
    Description: For the tunnel corrections of compressible flows those profiles are of interest for which at least the second approximation of the Janzen-Rayleigh method can be applied in closed form. One such case is presented by certain elliptical symmetrical cylinders located in the center of a tunnel with fixed walls and whose maximum velocity, incompressible, is twice the velocity of flow. In the numerical solution the maximum velocity at the profile and the tunnel wall as well as the entry of sonic velocity is computed. The velocity distribution past the contour and in the minimum cross section at various Mach numbers is illustrated on a worked out-example.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1030 , Luftfahrtforschung; 18; 9; 311-316
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  • 35
    Publication Date: 2019-08-26
    Description: This preliminary investigation was made to study the hydrodynamic properties and general behavior of simple hydrofoils. Six 5- by 30-inch plain, rectangular hydrofoils were tested in the NACA tank at various speeds, angles of attack and depths below the water surface. Two of the hydrofoils had sections representing the sections of commonly used airfoils, one had a section similar to one developed Guidoni for use with hydrofoil-equipped seaplane floats, and three had sections designed to have constant chordwise pressure distributions at given values of the lift coefficient for the purpose of delaying the speed at which cavitation begins. The experimental results are presented as curves of the lift and drag coefficients plotted against speed for the various angles of attack and depths for which the hydrofoils were tested. A number of derived curves are included for the purpose of better comparing the characteristics of the hydrofoils and to show the effects of depth. Several representative photographs show the development of cavitation on the the upper surface of the hydrofoils. The results indicate that properly designed hydrofoil sections will have excellent characteristics and that the speed at which cavitation occurs may be delayed to an appreciable extent by the use of suitable sections.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-SR-158
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  • 36
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    In:  CASI
    Publication Date: 2019-08-16
    Description: The Navier-Stokes stress principle is checked in the light of Maxwell's mechanism of friction and in connection herewith the possibility of another theorem is indicated. The Navier-Stokes stress principle is in general predicated upon the conception of the plastic body. Hence the process is a purely phenomenological one, which Newton himself followed with his special theorem for one-dimensional flows. It remained for Maxwell to discover the physical mechanism by which the shear inflow direction is developed: According to it, this shear is only 'fictitious' as it merely represents the substitute for a certain transport on macroscopic motion quantity, as conditioned by Brown's moiecular motion and the diffusion, respectively. It is clear that this mechanism is not bound to the special case of the one-dimensioilal flows, but holds for any flow as expression of the diffusion, by which a fluid differs sharply from a plastic body. If it is remembered, on the other hand, that the cause of the stresses on the plastic body lies in a certain cohesion of the molecules, it appears by no means self evident that this difference in the mechanism of friction between fluid and plastic body should not prevail in the stress principle as well, although it certainly is desirable in any case, at least subsequently, to establish the general theorem in the sense of Maxwell. Actually, a different theorem is suggested which, in contrast to that by Navier-Stokes, has the form of an unsymmetrical matrix. Without anticipating a final decision several reasons are advanced by way of a special flow which seem to affirm this new theorem. To make it clear that the problem involved here still awaits its final solution, is the real purpose behind the present article.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1029 , Luftfahrtforschung; 18; 9; 327-330
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  • 37
    Publication Date: 2019-07-13
    Description: The heat transfer in the laminar boundary layer of a heated plate in flow at high speed can be obtained by integration of the conventional differential equations of the boundary layer, so long as the material values can be regarded as constant. This premise is fairly well satisfied at speeds up to about twice the sonic speed and at not excessive temperature rise of the heated plate. The general solution of the equation includes Pohlhausen's specific cases of heat transfer to a plate at low speeds and of the plate thermometer. The solution shows that the heat transfer coefficient at high speed must be computed with the same equation as at low speed, when it is referred to the difference of the wall temperature of the heated plate in respect to its "natural temperature." Since this fact follows from the linear structure of the differential equation describing the temperature field, it is equally applicable to the heat transfer in the turbulent boundary layer.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1045 , Forschung; 11; 3; 116-124
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  • 38
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 243 (1940), S. 209-230 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Zeitschrift für anorganische Chemie 243 (1940), S. 276-287 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Zeitschrift für anorganische Chemie 243 (1940), S. 269-275 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
    Notes: FEHLING'sche Lösung und natronalkalische Glykokoll-Kupferlösung absorbieren Kohlenoxyd unter Oxydation zu Kohlendioxyd, das zu Carbonat gebunden wird. Dabei wird die FEHLING'sche Lösung anfangs nur zu Kupferoxydul, später auch zu Kupfermetall reduziert, während in der alkalischen Glykokoll-Kupferlösung neben Kupferoxydul bedeutend schneller Kupfermetall auftritt. Die Absorption des Kohlenoxyds beginnt bei beiden Lösungen sofort; der Verlauf der Absorptionen wurde gemessen und dargestellt.
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    Zeitschrift für anorganische Chemie 243 (1940), S. 297-306 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Zeitschrift für anorganische Chemie 244 (1940), S. 133-148 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Notes: Es werden die Ergebnisse der Bestimmung der Bildungswärmen und der thermischen Zersetzung von Cu3N, Zn3N2, Cd3N2, GaN, InN und Ge3N4 zusammengefaßt und im Zusammenhang besprochen. Die Bildungswärmen nicht untersuchter Nitride werden abgeschätzt und die energetischen Verhältnisse bei der Darstellung der Nitride diskutiert.
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    Zeitschrift für anorganische Chemie 244 (1940), S. 281-316 
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    Zeitschrift für anorganische Chemie 244 (1940), S. 317-328 
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    Zeitschrift für anorganische Chemie 244 (1940), S. 410-416 
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    Zeitschrift für anorganische Chemie 245 (1940), S. 12-15 
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    Zeitschrift für anorganische Chemie 251 (1943), S. 355-368 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
    Notes: Im wasserreichen Teil des Systems Al2O3/SO2/H2O kristallisieren beim Abkühlen Eis bzw. SO2-Hydrat aus; das von beiden Stoffen gebildete Eutektikum erstreckt sich weit in das ternäre System hinein. Konzentriert man Aluminiumsulfitlösungen bei Raumtemperatur, z. B. durch Eindunsten über P2O5 im SO2-Strom, so kristallisiert ein  -  formal „neutrales“  -  Sulfit der Formel Al2O3·3SO2·xH2O aus. Einige Eigenschaften der neuen Verbindung werden beschrieben und ihre Bildungsbedingungen untersucht.
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    Zeitschrift für anorganische Chemie 248 (1941), S. 65-71 
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    Notes: Es wurde der Nachweis erbracht, daß es möglich ist, Thomasschlackenmehl auf chemischem Wege aufzubereiten. Dabei wird neben einem hochwertigen Düngemittel ein sich zur Wiederverhüttung eignender, an Eisen, Mangan und Kalk angereicherter Zuschlag gewonnen, der bisher samt der citratunlöslichen Phosphorsäure verlorenging.
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    Zeitschrift für anorganische Chemie 248 (1941), S. 243-255 
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    Topics: Chemistry and Pharmacology
    Notes: Im Anschluß an die Auffindung der Halogenopentacarbonyle des Rheniums Re(CO)5Halg, über die früher berichtet wurde, wird das Bildungsbestreben dieser Verbindungen genauer untersucht. Es zeigt sich, daß sie bereits unter wesentlich milderen Bedingungen aus Rheniumhalogeniden entstehen, und zwar nimmt die Bildungstendenz in der Reihe Chlorid → Bromid → Jodid zu. Letzteres erhält man bereits im Kohlenoxydstrom bei gewöhnlichem Druck aus ReJ6K2, für Bromid und Chlorid, aus Komplexen oder normalen Rheniumhalogeniden, empfiehlt sich die Anwendung eines geringen Überdrucks von 10 bzw. 30 at Kohlenoxyd. Insgesamt ist für die Entstehung der Halogenopentacarbonyle weniger die Höhe des CO-Drucks als die Temperatur (200-230°) maßgebend.
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    Zeitschrift für anorganische Chemie 248 (1941), S. 256-268 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
    Notes: Nachdem die Bemühungen, durch Hochdrucksynthese aus metallischem Rhenium oder durch weitere Reaktionen der Halogenopentacarbonyle reines Rheniumcarbonyl zu erhalten, unter verschiedensten Bedingungen erfolglos blieben, wurde gefunden, daß oxydische Rheniumverbindungen, insbesondere Re2O7 oder auch ReO4K u. a. unter höherem CO-Druck und bei höherer Temperatur direkt halogenfreies, reines Rheniumcarbonyl liefern. Über den Reaktionsmechanismus der einfach zu formulierenden Umsetzungen werden verschiedene Vorstellungen entwickelt.
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    Zeitschrift für anorganische Chemie 248 (1941), S. 269-275 
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    Topics: Chemistry and Pharmacology
    Notes: Die Kohlenoxydverbindungen des Rheniums, die Halogenopentacarbonyle wie das reine dimere Pentacarbonyl, erweisen sich der CO-Substitution durch Pyridin oder o-Phenanthrolin zugänglich, wie dies schon früher bei den Metallen der Eisen- und Chromgruppe aufgedeckt wurde. Die aminsubstituierten Rheniumcarbonyle enthalten sämtlich noch wenigstens 3 Mol CO pro Rheniumatom, d.h.es werden stets nur 2Mol CO durch 2Mol Pyridin oder 1 Mol o-Phenanthrolin ersetzt: ReHal(CO)3Pyr2 nnd ReHal(CO)3 Phthrl sowie Re(CO)3Pyr2 und Re(CO)3, Phthrl2; letztere sind eventuell dimer wie das Rheniumpentacarbonyl. Die aminsubstituierten Rheniumcarbonyle erinnern bezüglich ihrer Entstehungsweise, ihres Baus und ihrer großen Beständigkeit durchaus an die aminsubstituierten Carbonyle der Chromgruppe.
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    Zeitschrift für anorganische Chemie 248 (1941), S. 289-296 
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    Topics: Chemistry and Pharmacology
    Notes: 1. Bei der Entwässerung von Triphenylzinnhydroxyd (C6H5)3SnOH unter milden Bedingungen entsteht der Bis-triphenyl-zinn-äther als leicht lösliche, bei 123° schmelzende Verbindung mit Molekülgitterstruktur.
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    Zeitschrift für anorganische Chemie 248 (1941), S. 276-282 
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    Topics: Chemistry and Pharmacology
    Notes: Es wurden die Absorptionsspektren der Rheniumhalogenopentacarbonyle und des reinen Rheniumcarbonyls in Hexan- und Dioxanlösung vom sichtbaren Gebiet bis 1760 Å nntersncht. Es wurden bei den 3 Halogenocarbonylen ziemlich übereinstimmend 2 Absorptionsgebiete bei etwa 3325 Å und etwa 2700 Å gefunden, die nur im Falle der Chloro- und Bromoverbindung vom Lösungsmittel beeinflußt waren. Beim Rheniumpentacarbonyl war nur ein Absorptions maximum bei 3100 Å festzustellen, dessen Extinktionswert um das etwa 85fache gestiegen ist. Anschließend werden theoretische Rückschlüsse auf die Konstitution u. a. aus den beobachteten Absorptionsspektren gezogen.
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    Zeitschrift für anorganische Chemie 248 (1941), S. 297-312 
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    Topics: Chemistry and Pharmacology
    Notes: Es wird über Gasdichtebestimmungen an Schwefelmonoxyd berichtet, aus denen sich Molekulargewichte von etwa 70 ergeben. Messungen der bei der völligen Zersetzung des Schwefelmonoxyds eintretenden Volumverminderung ergaben eine Kontraktion auf etwa 3/4 des ursprünglichen Gasvolumens. Hieraus ist zu schließen, daß in der Gasphase neben monomeren auch dimeres SO vorliegt. Es wird dargelegt, daß auch die Annahme einen stöchiometrischen Gemisches von S2O und S2 gebildet nach der Gleichung 3 SO → S2O + SO2, mit den gefundenen Gasdichten und Volumkontraktionen zu vereinbaren ist.
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    Zeitschrift für anorganische Chemie 248 (1941), S. 314-318 
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    Zeitschrift für anorganische Chemie 248 (1941), S. 313-313 
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    Zeitschrift für anorganische Chemie 248 (1941), S. 319-344 
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    Topics: Chemistry and Pharmacology
    Notes: Im Anschluß an die potentiometrische Analyse basischer Aluminiumchloridlösungen durch W. D. TREADWELL und M. ZÜRCHER sind hochbasische Aluminiumchloridlösungen in bezug auf ihre Entstehung, Konstitution und Reaktionsweise untersucht worden, und zwar in erster Linie Lösungen der Basizitätsgrade .
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    Zeitschrift für anorganische Chemie 244 (1940), S. 48-56 
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    Topics: Chemistry and Pharmacology
    Notes: In der vorliegenden Arbeit wurde der Einfluß der Oxydationsbedingungen auf die Struktur des elektrolytisch erzeugten Aluminiumoxyds geprüft. Die Untersuchung erstreckte sich auf die Ermittlung der Kristallisations- bzw. Kornwachstumsfähigkeit in Abhängigkeit von der Glühbehandlung unter Anwendung des Debye-Scherrer-Verfahrens. Gleichzeitig wurde der durch die Glühbehandlung bedingte Gewichtsverlust ermittelt. Die untersuchten Schichten sind im Ausgangszustand röntgenamorph. Mit steigender Glühtemperatur wiesen sie Sammelkristallisation auf. Der Übergang vom röntgenamorphen zum kristallinen Zustand vollzieht sich oberhalb 700°. Das Kristallisationsprodukt ist bei den Oxalsäureschichten und bei der Schwefelsäure- Wechselstromschicht y-Aluminiumoxyd; bei der.
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    Zeitschrift für anorganische Chemie 244 (1940), S. 63-66 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
    Notes: Ein von Dr. W. FEIT hergestelltes Holmiumpraparat, daß nach röntgenspektroskopischem Befund von Frau I. NODDACK neben dem Hauptelement nur 0,013 Atom-% Y,0,04 Atom-% Er und 0,03 Atom-%, Dy enthielt, wurde in das wasserfreie Trichlorid verwandelt und dieses mit Silber verglichen.
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    Zeitschrift für anorganische Chemie 244 (1940), S. 67-84 
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    Topics: Chemistry and Pharmacology
    Notes: Soda-Eisenoxyd-Gemische lassen sich, wie bereits bekannt ist, nicht unzersetzt schmelzen. Es tritt beim Erhitzen Bildung von Natriumferrit (N2O. Fe2O3) unter (CO2-Abspaltung ad. Hieraus ergibt sich, daß man beim Erschmelzen des Ausgangssystems N2CO3-Fe2O3 zu Zusammensetzungen gelangt, die innerhalb der Systeme Na2CO3-N2O3 · Fe2O3 nnd Na2O3 · Fe2O3-Fe2O3 liegen. Die Schmelzdiagramme dieser beiden Systeme wurden aufgestellt.
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    Zeitschrift für anorganische Chemie 244 (1940), S. 85-88 
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    Zeitschrift für anorganische Chemie 244 (1940), S. 89-93 
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    Zeitschrift für anorganische Chemie 248 (1941), S. 383-396 
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    Topics: Chemistry and Pharmacology
    Notes: Mit Ausnahme von Europium-, Terbium- und Ytterbiumjodid wurden die Lösungswärmen aller wasserfreien Jodide der dreiwertigen seltenen Erden einschließlich des Yttriums gemessen und mit Hilfe der Lösungswärmen der Metalle ihre Bildungswärmen berechnet.
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    Zeitschrift für anorganische Chemie 248 (1941), S. 397-401 
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    Topics: Chemistry and Pharmacology
    Notes: Es wird die Stellung des Yttriums und seiner Verbindungen zu den Lanthaniden besprochen. Die Einordnung ist je nach der betrachteten Eigenschaft verschieden; die Unterschiede lassen sich auf Grund der Verschiedenheit der Kernladung und damit der Elektronenzahl verstehen.
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    Zeitschrift für anorganische Chemie 248 (1941), S. 402-403 
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    Zeitschrift für anorganische Chemie 248 (1941), S. 404-404 
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    Zeitschrift für anorganische Chemie 248 (1941), S. 405-424 
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    Topics: Chemistry and Pharmacology
    Notes: Im System Mg—Hg wurden durch röntgenographische Pulver-und Einkristallaufnahmen an 33 verschiedenen Legierungen bei Zimmertemperatur 6 intermediäre Kristallarten festgestellt und mit β, γ, δ, ∊, ζ, η bezeichnet.
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    Zeitschrift für anorganische Chemie 249 (1942), S. 1-22 
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    Zeitschrift für anorganische Chemie 249 (1942), S. 23-25 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
    Notes: An Hand von Literaturdaten wird gezeigt, daβ die Lösungswärms von Trichloriden mit steigender Salzsäurekonzentration der Lösung stark abnimmt. Die hierfür in Frage kommenden Gründe werden besprochen und ein Erklärungsversuch für die Feinarbeiten der Abstufung gegeben.
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    Zeitschrift für anorganische Chemie 249 (1942), S. 43-57 
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    Topics: Chemistry and Pharmacology
    Notes: Die Untersuchungen über den Mechanismus der Hochdrucksyntheses von Mettalcarbonylen der Eisenreihe aus den betreffenden Halogeniden führte zu dem Ergebnis, daß hierbei beim Kobalt „Gemischte Carbonyle“ mit verschiedenen Metallatomen im Molekül entstehen, sofern halogenbindende Beimetalle der Zink- und Galliumgruppe oder Zinn und Blei zugegen sind.
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    Zeitschrift für anorganische Chemie 249 (1942), S. 65-75 
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    Topics: Chemistry and Pharmacology
    Notes: Es werden die speziellen Diffusionskoeffizienten der Chromsäure- Anionen in Abhängigkeit von der Wasserstoffionenkonzentration der Lösung gemessen. Der Diffusionskoeffizient D10 · z hat fur die Monochromationen (pH = 11-13) den Wert 0,57, für die Dichromationen ([H+] = 1/100 - 4 norm.) den Wert 0,635 und für die Trichromationen vermutlich den Wert 0,58-0,59.
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    Zeitschrift für anorganische Chemie 249 (1942), S. 26-42 
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    Topics: Chemistry and Pharmacology
    Notes: An Hand umfangreichen Versuchsmataterials wird der Mechanismus der Hochdruckthesen von Carbonylen der Eisenreihe aus ihren Halogeniden untersucht. Hierbei ergaben sich auch für die Bildung von Eisenpentacarbonyl oder Nickelcarbonyl dieselben GesetzmäBigkeiten, wie sie schon früher für die Entstehung von Kobaltcarbonyl aus Kobalthalogeniden aufgedeckt wurden:1Die Carbonylbildung erweist sich zunächst abhängig von der Natur des Halogens und nimmt mit der Fähigkeit zur Halogenabspaltung, d. h. in der Reihe Chlorid → Bromid → Jodid zu. Für den besonders leichten Umsatz der Jodide spielen die primär entstehenden Carbonyljodide Fe(CO)4J2 oder CoJ2 · CO eine wesentliche Rolle. Sie disproportionieren sich alsdann je nach ihrer Beständigkeit mehr oder weniger leicht in die reinen Carbonyle. So erklärt sich auch die „katalytische Wirkung“, die bereits Spuren Jod bei der Carbonylbildung aus Metal1 und Kohlenoxyd ausüben.2Die Anwesenheit halogenbindender Metalle, wie Kupfer oder Silber, begünstigt wesentlich die Entstehung von Metallcarbonylen aus den betreffenden Halogeniden, und zwar um so mehr, je größer die Bildungswärme der Halogenverbindungen dieser Metalle ist. Kupfer erweist sich so als wirksamer als Silber, und zwar bei allen Versuchen im selben Verhältnis. Bestimmend ist somit bei diesen Reaktionen der Grad der Umsetzung zwischen den betreffenden Halogeniden der Eisenreihe und der „Begleitmetallo“ (Cu oder Ag) in festem Zustand, der der Warmetönung der Reaktion parallel geht. Das Kohlenoxyd ist diejenige Reaktionskomponente, die infolge der exothermen Carbonylbildung den Umsatz dieser Trockenreaktionen entsprechend steigert.
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    Zeitschrift für anorganische Chemie 249 (1942), S. 58-64 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Bildungsweisen von Kobalt- und Eisencarbonylwasserstoff werden kurz zusammenfassend dargestellt: Es ergeben sich hierbei erhebliche Unterschiede in der Bildungstendenz der beiden Hydride, die durch den negativen Verlauf von Versuchen zur Synthese von Eisencarbonylwasserstoff, die sich den bekannten Bildungsbedingungen des Kobaltcarbonylwasserstoffs anschließen, noch besonders hervortreten. Im gleichen Sinne wird gezeigt, daß auch die Metallderivate der Carbonylwasserstoffe nur beim Kobalt im Vordergrund stehen und auf verschiedene Weise gebildet werden, während sich umgekehrt vom Eisen Carbonylhalogenide ableiten, die beim Kobalt fehlen. Strukturell ist dieses Verhalten auf die verschiedene Natur der Radikale Fe(CO)4 und Co(CO)4 zurückzuführen.
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    Zeitschrift für anorganische Chemie 249 (1942), S. 76-87 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Präparative Methoden zur Herstellung definierter Kobalt-sulfide Co3S4 und CoS werden beschrieben. Ersteres ist durch Auf-schwefeln von Kobaltmetallpulver bei 400° mit Schwefelwasserstoff, letzteres durch Aufschwefeln bei 700° und Abdestillieren des elementaren Schwefels bei 750° bis 800° im Hochvakuum zu erhalten.
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    Zeitschrift für anorganische Chemie 249 (1942), S. 88-99 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Verschiedene Sesquioxyde, Mn2O3, Rh2O3 und Cr2O3 begin-steigt die Oxydation des metallischen Silbers durch Sauerstoffgas auch bei höheren Temperaturen.
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    Zeitschrift für anorganische Chemie 245 (1940), S. 321-333 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Hochdrucksynthese lassen sich aus Iridiumhalogeniden wie aus komplexen Halogenosalzen dieses Metalls Iridiumcarbonyle gewinnen, die sich als Iridiurntri- und tetracarbonyl identifizieren lassen. Der Mechanismus dieser Synthese unterscheidet sich in interessanter Weise von den entsprechenden Reaktionen, die z. B. zur Bildung von Kobaltcarbonyl aus Kobalthalogeniden führen. Er kann mit der intermediären Entstehung von Carbonylhalogeniden verschiedener Kohlenoxyd- und Halogenierungsstufen erklärt werden, eine Annahme, die durch den vorläufigen Nachweis solcher Carbonylhalogenide gestützt wird. Dieser Reaktionsmechanismus macht es auch verständlich, daß die Verwendung eines halogenbindenden Beimetalls nur bedingte Wirkung besitzt.
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    Zeitschrift für anorganische Chemie 249 (1942), S. 100-112 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurden folgende Wärmetönungen bestimmt:1Durch Auflösen von Mg in HCl-haltiger Flußsäure (§ 5): \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm Mg + F}_{\rm 2}\,{\!=\!\!=}\,{\rm MgF}_{\rm 2} + 261,4 \pm 1\,{\rm kcal}{\rm .} $$\end{document}2Durch thermische Reduktion von CrF3 mit Mg (§ 1-4 u. 6): \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm Cr + 3/2}\,{\rm F}_{\rm 2}\,{\!=\!=}\,{\rm CrF}_{\rm 3} + 266,1 \pm 1\,{\rm kcal}{\rm .} $$\end{document}3Durch thermische Reduktion von CrF4 mit H2 (§ 7-9): \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm CrF}_{\rm 3} {\rm + 1/2}\,{\rm F}_{\rm 2}\,{\!=\!=}\,{\rm CrF}_{\rm 4} + 20,4 \pm 1\,{\rm kcal}{\rm .} $$\end{document}4Durch vergleichende Lösung von Cr u. CrCL3 in HCl (§ 10-13): \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm Cr + 3/2}\,{\rm Cl}_{\rm 2}\,{\!=\!=}\,{\rm CrCl}_{\rm 3} + 132,6 \pm 1\,{\rm kcal}{\rm .} $$\end{document}5CrF3 hat dieselbe Gitterstruktur und fast dieselbe Gitterkonstante wie AlF3 (§8 3).
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    Zeitschrift für anorganische Chemie 249 (1942), S. 119-132 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird eine Reihe von Indiumsahen, welche in der Literatur bis jetzt unvollständig oder noch nicht beschrieben waren, mit ihren Eigenschaften angegeben. Bei den Halogeniden des Indiums wurden Vergleiche der chemischen Eigenschaften, insbesondere der Löslich-keit und der Hydrolyse, angestellt. Fur analytische Zwecke kommen zur qusntitativen Bestimmung des Indiums das Indium-diäthyl-dithiocarbamat und das lndiumhexamminkobalt(III)-chlorid in Frage.
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    Zeitschrift für anorganische Chemie 249 (1942), S. 133-133 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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    Zeitschrift für anorganische Chemie 249 (1942), S. 134-145 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird eine auf ein breites experimentelles Material gegründete Theorie mitgeteilt, welche für feste Stoffe mit bekanntem Schmelz-punkt die Temperaturgebiete anzugeben gestattet, in welchen bei allmählich ansteigender Temperatur eine Auflockerung der Ober-fläche (α = 0,29) und eine Auflockerung dss Kristallgitters (α = 0,42) stattfindet. Es wird gezeigt, daß die in dem Eisen, Kupfer, α-Alu-miniumoxyd und Nickel irreversibel festgehdtenen flüchtigen Fremd-bestandteile mit minimaler Geschwindigkeit bei den genannten Auf-lockerungstemperaturen abgegeben werden.
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    Zeitschrift für anorganische Chemie 245 (1941), S. 391-401 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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    Zeitschrift für anorganische Chemie 246 (1941), S. 1-1 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
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    Zeitschrift für anorganische Chemie 249 (1942), S. 146-197 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die wichtigsten bekannten Reaktionen zur Trennung des Scan-diums von den ihm verwandten Elementen mrden einer experimentellen-tcllen Kritik unter röntgenspektralanalytischcr Kontrolle unterworfen und fast durchweg als unbefriedigend erkannt. Die bisher kaum ver-wandten bzw. nicht näher untersuchten Trennungen durch Ver-flüchtigung der Chloride und der Bcetylacetonate erwiesen sich zwar als sehr wirksame Scheidungen, sind aber umständlich. Dagegen ließ sich unsere Beobachtung, daß Scandium aus wäßriger Ammonium-rhodanidlösung weitgehend mit Äther ausschüttelbar ist, zu einem neuen, den anderen Reaktionen in jeder Hinsicht uberlegenen Trennungsverfahren entwickeln.
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    Zeitschrift für anorganische Chemie 249 (1942), S. 209-218 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es werden die magnetischen Suszeptibilitäten von TiCl2, TiBr2, TiJ2 und VJ2 bei + 15°, -78° und -183° gemessen. Die Werte zeigen Abweichungen vom reinen Ionenmagnetis-mug, die von den Mangan- zu den Titanverbindungen und von den Jodiden zu den Chloriden zunehmen. Diese Abweichungen werden auf Atombindungen zwischen den Metallionen zurückgefiihrt.
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    Zeitschrift für anorganische Chemie 249 (1942), S. 219-224 
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    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Halogenwasserstoffe wurden magnetisch gemessen und auf Grund der gefundenen Suszeptibilitäten der Wert der verschiedenen Systeme diskutiert, die für den Diamagnetismus edelgasähnlicher Ionen aufgestellt sind.
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    Zeitschrift für anorganische Chemie 249 (1942), S. 225-228 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird eine Methode zur elektrolytischen Bestimmung des Rheniums angegeben. Für die Trennung des Rheniums vom Molybdän durch Fallung mit H2S in ammoniakalischer Lösung wird eine Vorschrift gegeben, die gegenüber den Angaben von Mülleb und LaLande eine wesent-liche Zeitersparnis bedeutet.
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    Zeitschrift für anorganische Chemie 249 (1942), S. 229-237 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Nach dem aluminothermischen Verfahren wurden die Boride Mo7Al6B7 and WB2 hergestellt. Die Abmessungen der Elementarkörper und die Dichten dieser Substanzen werden angegeben.
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    Zeitschrift für anorganische Chemie 249 (1942), S. 238-244 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Aus gasförmigem Chlordioxyd und Fluor läßt sich unter ge-eigneten Bedingungen, z. B. Chlordioxyd-Druckenivon etwa 25 mm oder darunter, Fluordrucken von etwa 50 mm und Zusatz mehrerer hundert Millimeter inerten Gases bei einem Gesamtdruck von 1 Atm. und Temperaturen um 0°C, eine Verbindung von der Zusammensetzung ClO2F darstellen.
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    Zeitschrift für anorganische Chemie 249 (1942), S. 245-250 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Löslichkeit einiger Salze und Säuren in Wasser wurde bei Temperaturen oberhalb von l00° bestimmt. Auf Grund der so er-erhaltenen und der schon vorliegenden Werte wurden die Löslich-keitskurven konstruiert.
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    Zeitschrift für anorganische Chemie 249 (1942), S. 278-280 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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    Zeitschrift für anorganische Chemie 246 (1941), S. 158-168 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die von A. MAGNUS und E. SCHMID 1922 mitgeteilten Dichtemessungen an Benzol und Chloroform im Dampfzustande bei Temperaturen nahe bei 100° wurden neu ausgewertet; dabei wurde eine andere Berechnungsart angewandt, als die von den deutschen Forschern damals benutzte. Die neu berechneten Ergebnisse bestätigen die Schlußfolgerung von MAGNUS und SCHMID, daß die von ihnen entwickelte Methode zur Messung der Dichte im Dampfzustande für die exakte Bestimmung der Atomgewichte der in den Verbindungen enthaltenen Atome brauchbar ist.
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    Zeitschrift für anorganische Chemie 246 (1941), S. 169-194 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird das Mischkristallgebiet zwischen FeS und Schwefel (Troilit-Pyrrhotinphase) eingehend untersucht. Zwischen 50,O und 51,O Atom-% Schwefel erstreckt sich ein Überstrukturgebiet; die Überstruktur geht bei 51,O Atom-% Schwefel zweiphasig in den B-8-Typ über. Die a-Werte der Grundzelle sind im Überstrukturgebiet kleiner, die c-Werte dagegen größer als im B-8-Typ. Volumenmäßig findet sich keine Diskontinuität. Dichtemessungen ergeben, daß beim FeS selbst keine Leerstellen vorliegen. Die schwefelreicheren Mischkristalle sind vom Subtraktionstypus. Beim Übergang zwischen den beiden Gittertypen ändert sich der Paramagnetismus zwar nur wenig, aber sprunghaft. Das Verhalten dieses ganzen Gebietes läßt sich qualitativ durch die Annahme verstehen, daß neben den Atombindungen mit antiparallelem Spin in Richtung der c-Achse solche Atombindungen auch in Richtung der a-Achse vorhanden sind, die beim Übergang von der Überstruktur zum B-8-Typ aufbrechen.
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    Zeitschrift für anorganische Chemie 251 (1943), S. 125-160 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurde festgestellt, daß die Autoxydation des Tricyclohexylbleis auch in Lösung nur bei geeigneter Belichtung vor sich geht. Die hiernach erforderliche Aktivierung R3Pb → R3Pb* findet durch Na-Licht nicht statt. Die Kurve der Lichtabsorption des (C6H11)3Pb enthält weder im Sichtbaren noch im Ultraviolett charakteristische Absorptionsmaxima. Dem Gesamtverlauf der Autoxydation entspricht quantitativ praktisch die Formulierung Anstatt eines Peroxydes konnte nur (C6H11)3PbOPb (C6H11)3, das in gleicher Weise weiter reagierte, als Zwischenprodukt gefaßt werden.
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    Zeitschrift für anorganische Chemie 251 (1943), S. 166-166 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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    Zeitschrift für anorganische Chemie 251 (1943), S. 161-165 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. In einem strömenden Schwefeldampf-Stickstoffgemisch setzt sich Zinkoxyd bei ∼ 1000° im Laufe 1 Stunde quantitativ zu ZnS und SO2 um. Aus der titrimetrisch bequem erfaßbaren SO2-Menge läßt sich die vorhandene Oxydmenge mit großer Genauigkeit ermitteln.
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    Zeitschrift für anorganische Chemie 251 (1943), S. 201-212 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Aus feinteiligem Nickelmetall oder Nickelhalogeniden wurde in strömendem Ammoniak bei 445 bzw. 410°C die Verbindung Ni3N erhalten. Chemisches Verhalten und thermische Beständigkeit der Verbindung werden angegeben.
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    Zeitschrift für anorganische Chemie 251 (1943), S. 213-220 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird eine neue Methode zur Darstellung des KURROL'schen Salzes beschrieben. Die an diesem Salz beobachteten Eigenschaften weichen in wesentlichen Punkten von den Angaben von PASCAL ab.
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    Zeitschrift für anorganische Chemie 251 (1943), S. 221-221 
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    Keywords: Chemistry ; Inorganic Chemistry
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    Topics: Chemistry and Pharmacology
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    Zeitschrift für anorganische Chemie 251 (1943), S. 222-232 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Es werden die Fragen erörtert, die bezüglich des Auftretens des NiAs-, CdJ2- und Pyritgitters bzw. des Überganges vom NiAs- zum CdJ2-Typ bei den Chalkogeniden der Übergangselemente auftreten.
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    Zeitschrift für anorganische Chemie 251 (1943), S. 167-200 
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Auf Grund des Zustandsdiagramms des Systems Na2O—B2O3— H2O wurden sichere Darstellungsverfahren des Natriummonoborat-4-Hydrates sowohl aus reiner wie aus überschüssig alkalischer Lösung ausgearbeitet. Hierbei wurden verschiedene Eigentümlichkeiten des kristallisierten Tetrahydrates beobachtet. Die Dichte ϱ25° beträgt 1,743 ± 0,003.
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