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  • 1
    Electronic Resource
    Electronic Resource
    Molecular and crystal structure of 2,4,4,6,6,8,8-heptamethyl-2-[3-{[2,4,4,6,6-pentakis(dimethylamino)-2,2,4,4,6,6-hexa-hydro-1,3,5,2,4,6-triazatriphosphorine-2-yl]amino}propyl]-cyclotetrasiloxane (1985)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 523 (1985), S. 14-20 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Molekular- und Kristallstruktur des 2,4,4,6,6,8,-Heptamethyl-2-[3-{[2,4,4,6,6-penta-kis (dimethylamino)-2,2,4,4,6,6-hexahydro-1,3,5,2,4,6-triazatriphosphorine-2-yl]-amino}propyl]cyclotetrasiloxansDie Molekular- und Kristallstruktur der Titelverbindung wurde bestimmt. Die (PN)3- und (SiO)4-Ringe bilden einen Diederwinkel von 100,1° und mit der HNCH2CH2CH2-Ebenen die winkel von 110,2° bzw. 75,7°. die molekulare Packung wird aus alternierenden Schichten von (PN)3- und (SiO)4-Heterocyclen aufgebaut.
    Notes: Molecular and crystal structure of the title compound has been determined. The (PN)3 and (SiO)4 rings form the dihedral angle of 100.1° and with the HNCH2CH2CH2 plane the angles of 110.2° and 75.7° respectively. The molecular packing is built of alternating layers of (PN)3 and (SiO)4 beterocycles.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19855230403
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis and structures of some diorganotin bis(hydroxamate)sDedicated to Dr F. E. Brinckman. (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 8 (1994), S. 11-17 
    Details
    ISSN: 0268-2605
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Analysis of literature data on the antitumor activity of organotin compounds reveals that R2SnX2 and their complexes containing Sn—O, Sn—N or Sn—S bonds often exhibit biological activity, especially if such bonds are formed by means of intramolecular coordination. Furthermore, a wide range of biological activities, from fungicidal, bactericidal and antiseptic to psychotropic and antitumor, is found to be characteristic for some organic hydroxamic acids (N-acylhydroxylamines). From this point of view the diorgantion bis-hydroxamates in this paper are of particular interest as potential biologically active antitumor drugs. Di-n-butyltin bis(N-methyl-N-p-bromobenzoylhydroxylamine) is being screened for antitumor activity.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590080104
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  • 3
    Electronic Resource
    Electronic Resource
    Stereochemistry of aminolysis of N-pentafluorophenylcarbonimidoyl dichloride. Crystal and molecular structures of N2-pentafluorophenyl-N1,N1-dibenzylchloroformamidine (1993)
    Chichester : Wiley-Blackwell
    Journal of Physical Organic Chemistry 6 (1993), S. 319-325 
    Details
    ISSN: 0894-3230
    Keywords: Organic Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: It has been established that the product of the reaction of N-pentafluorophenylcarbonimidoyl dichloride (1) with dibenzylamine, viz. N2-pentafluorophenyl-N1,N1-dibenzylchloroformamidine (4a) is a Z-isomer, whereas according to the concept of stereoelectronic control one might have expected a product with E-configuration. The heat of formation and the geometry of Z- and E isomer of N2-pentafluorophenyl-N1,N1-diethylchloroformamidine (4b) (the latter is a product of the reaction of 1 with diethylamine) were calculated with the semi-empirical MNDO method. The calculated geometry of (Z)-4b was found to be in a good agreement with the experimentally determined structure of 4a. The formation of (Z)-4b is more preferable energetically than that of (E)-4b; the calculated difference in the heats of formation is 2·8 kcal mol-1. Thermodynamic control of the reaction stereochemistry is proposed.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/poc.610060602
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  • 4
    Electronic Resource
    Electronic Resource
    Komplexe des Eisens mit aromatischen LigandenWir danken Herrn Prof. Dr. H.-J. TIMPE, TH “Carl Schorlemmer” Leuna-Merseburg, für die deutsche Übersetzung und entsprechende Bearbeitung dieser Publikation.Herrn Prof. Dr. Dr. h. c. H. G. O. Becker zum 60. Geburtstag gewidmet (1983)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 325 (1983), S. 27-35 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Complexes of Iron with Aromatic LigandsThe reaction of FeCl3 · 6 H2O with several substituted o-phenylene diamines forms complexes of the Fe(II)-ion with o-quinone diimines. Before the formation of these complexes there are a few of redox reactions between Fe(III)ions and the diamines. The Fe(III)/o-quinone diimine-complex is an intermediate which was characterized by means of spectroscopic methods. The two forms of 6-oxy-7-nitrosobenzthiazoline produce only one 1:3 complex with Fe(II)ions. Also the N-methyl-6-oxy-7-nitrosobenzthiazolium iodide forms a 1:3 complex. In the former complex the quinone-oxim-form is the ligand. The isolated complexes were characterized through elemental analysis and physical methods.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19833250104
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  • 5
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Kinetik und zum Wärmeeffekt der Cyclotrimerisierung von Arylcyanaten (1976)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 318 (1976), S. 923-929 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on the Kinetics and the Reaction Heat of the Cyclotrimerization of Aryl CyanatesThe kinetics and the reaction enthalpy of the polycyclotrimerization of 2,2-bis(4-cyanatophenyl)propane in ditolylmethane solution were investigated by means of direct calorimetry, varying the concentration of the catalyst (chromium(III) acetyl acetonate) and of the monomer as well as the reaction temperature, the water content of the solvent, and the amount of added acetyl acetone.The maximum reaction rate is proportional to the monomer concentration, to the square root of the concentration of the catalyst, and to the water content. It is inversely proportional to the amount of water added.Presumably, water participates in the formation of the active species of the catalyst, and the autocatalytic nature of the polycyclotrimerization of 2,2-bis(4-cyanatophenyl)propane in presence of chromium acetylacetonate is due to accumulation of the latter during reaction.
    Notes: Mittels direkter Kalorimetrie wird die Kinetik und der Wärmeeffekt der Polycyclotrimerisierung des 2,2-Bis-(4-cyanatophenyl)-propans in einer Ditolylmethanlösung in Abhängigkeit von der Katalysator (Chrom(II)-acetylacetonat)- und Monomerkonzentration sowie der Reaktionstemperatur, dem Wassergehalt des Lösungsmittels und Zusätzen von Acetylaceton zum System untersucht.Es wird gezeigt, daß die maximale Reaktionsgeschwindigkeit der Monomerkonzentration, der Quadratwurzel aus der Katalysatorkonzentration und dem Wassergehalt proportional und der Menge an zugesetztem Acetylaceton umgekehrt proportional ist.Es wird angenommen, daß Wasser an der Bildung der aktiven Form des Katalysators teilnimmt und daß der autokatalytische Charakter der Polycyclotrimerisierung des 2,2-Bis(4-cyanatophenyl)-propans in Gegenwart von Chromacetylacetonat mit der Anreicherung des letzteren während der Reaktion verbunden ist.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19763180608
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  • 6
    Electronic Resource
    Electronic Resource
    Organotin(IV) complexes with tetraethyl ethylene- and propylene-diphosphonates (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 9 (1995), S. 11-22 
    Details
    ISSN: 0268-2605
    Keywords: organotin(IV) complexes ; diphosphoryl ligands ; NMR ; Mössbauer spectroscopy ; X-ray analysis ; antitumour activity ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The series of organotin halide complexes with tetraethyl ethylene- and propylene-diphosphonates RnSnX4-n,·L [n=0, X=Cl; n=1, R=Me, X=Cl, Br; n=1, R=Ph, X=Cl; n=2, R=Me, Et, Bu, X=Cl, Br; n=2, R=Ph, X=Cl; L=(EtO)2P(O)CH2CHR'P(O)(OEt)2, R'=H, Me] were synthesized and characterized by means of NMR and Mössbauer spectroscopy. The crystal structure of the complex of diphenyltin dichloride with propylenediphosphonate was determined. The complex consists of polymer chains with bridging bidentate ligands and an octahedral tin environment containing two types of phosphoryl fragments. All of the R2SnX2 adducts have trans-R2SnX4 geometries of tin coordination octahedra according to the quadrupole splitting values in the Mössbauer spectra. The 31P and 119Sn NMR studies at low temperatures revealed that RSnHal3 complexes in solution form isomers with different mutual orientations of phosphoryl ligands and organic groups in the coordination sphere. The diethyltin dichloride adduct with ethylene-diphosphonate appeared to be active against lung cancer NCI-H522 cells.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590090104
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  • 7
    Electronic Resource
    Electronic Resource
    Complexes of diorganotin(IV) dihalides with diphosphoryl compounds and their Mössbauer spectra (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 7 (1993), S. 353-355 
    Details
    ISSN: 0268-2605
    Keywords: Organotin ; Mössbauer ; phosphorus ligand ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590070509
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  • 8
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Katalyse der Ammoniaksynthese und des Stickstoffisotopenaustausches durch Schichtverbindungen von Graphit mit Eisen, Ruthenium und Osmium (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 428 (1977), S. 231-236 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigations on the Catalysis of Ammonia Synthesis and Nitrogen Isotope Exchange by Lamellar Compounds of Graphite with Iron, Ruthenium, and OsmiumThe catalytic activity of transition metal potassium-graphite lamellar compounds for the synthesis of ammonia from the elements and the catalysis of the equilibration by isotope exchange of the isotopic nitrogen molecules are shown to correlate. Connections between the state of metal in the catalyst exist with iron as metal which is shown by Mössbauer spectroscopy and the catalytic activity in relation to the potassium content.
    Notes: Die katalytische Aktivität von Übergangsmetall-Kalium-Graphitverbindungen bei der Synthese von Ammoniak aus den Elementen und bei der Einstellung des Isotopenaustauschgleichgewichts der isotopen Stickstoffmolekeln korrelieren miteinander. Im Falle von Eisen als Metall sind Beziehungen zwischen dem durch Mößbauer-Spektroskopie ermittelten Zustand des Metalls im Katalysator und der katalytischen Aktivität in Abhängigkeit vom Kaliumgehalt erkennbar.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774280129
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  • 9
    Electronic Resource
    Electronic Resource
    Zur Erhöhung der Reaktivität von apatitischen Rohphosphaten durch mechanische Aktivierung (1979)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 452 (1979), S. 141-150 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Increase in the Reactivity of Apatitic Phosphates due to Mechanical ActivationThe lattice of natural apatitic phosphates was severely distorted by mechanical activation. At a high energy concentration in a centrifugal mill the crystals reach the X-ray amorphous state. The structural changes are investigated by infrared and X-ray methods. At increased degrees of activation the mechanically activated apatitic phosphates show enhanced solubility as a result of structural changes.
    Notes: Natürliche apatitische Phosphate werden durch mechanische Aktivierung in ihrer Gitterstruktur stark gestört, bei hohen Energiekonzentrationen in der Planetenmühle bis zum röntgenamorphen Zustand. Die auftretenden strukturellen Änderungen werden mit röntgenographischen und infrarotspektroskopischen Methoden untersucht. Die mechanisch aktivierten apatitischen Phosphate zeigen mit steigendem Aktivierungsgrad eine zunehmende Löslichkeit als Folge der strukturellen Änderungen.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19794520118
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  • 10
    Electronic Resource
    Electronic Resource
    Zur Reaktivität von PCl5 mit Übergangsmetallcarbonylen und -phosphiden (1988)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 567 (1988), S. 111-121 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactivity of PCl5 with Transition Metal Carbonyls and PhosphidesMoP2 reacts with 8 equivalents of PCl5 to MoCl4, which may be isolated in form of MoCl4(CH3CN)2. The reaction of PCl5 with M(CO)6 (M = Mo, W) depends on the solvent. Thus MoOCl3 · POCl3 was obtained in CCl4 whereas in CH3CN the compounds WCl4(CH3CN)2, MoCl3(CH3CN)4, mer-MoCl3(CH3CN)3, fac-MoCl3(CH3CN)3 and [Kat]+[MoCl4]- · nCH3CN ([Kat]+ = [PCl4]+, n = 6; [Kat]+ = [PPN]+, n = 4), respectively, are isolated depending on the amount of PCl5. The structure of the products is discussed on the basis of the IR- and Raman spectra and of magnetic moments.
    Notes: MoP2 reagiert mit 8 Äquivalenten PCl5 unter Bildung von MoCl4, welches als MoCl4(CH3CN)2 isoliert werden kann. Die Reaktion von PCl5 mit M(CO)6 (M = Mo, W) ist lösungsmittelabhängig. Während in CCl4 das MoOCl3 · POCl3 isoliert wird, führt die Umsetzung in CH3CN in Abhängigkeit von der Menge an PCl5 zu WCl4(CH3CN)2 bzw. MoCl3(CH3CN)4, mer-MoCl3(CH3CN)3, fac-MoCl3(CH3CN)3 und [Kat]+[MoCl4]- · nCH3CN ([Kat]+ = [PCl4]+, n = 6; [Kat]+ = [PPN]+, n = 4). Die Struktur der erhaltenen Produkte wird anhand der IR- und Ramanspektren bzw. von magnetischen Messungen diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19885670113
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