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  • 1
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie der Alkylverbindungen von Übergangsmetallen. XV. Bildung und Eigenschaften von Phenylvanadindichlorid (1975)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 415 (1975), S. 104-108 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Transition Metal Alkyl Compounds. XV Preparation and Properties of Phenyl Vanadium DichlorideVanadium(IV) chloride reacts with diphenyl zinc forming extremely air sensitive, at room temperature stable phenyl vanadium dichloride. The diffuse reflectance spectrum indicates an octahedral structure of the vanadium compound which is to regard as a coordination polymer. - Diethyl ether causes a cleavage of the V - C bond with formation of a vanadium dichloride etherate.
    Notes: Bei Einwirkung von Zinkdiphenyl auf Vanadin(IV)-chlorid entsteht äßerst luftempfindliches, bei Zimmertemperatur stabiles Phenylvanadindichlorid C6H5VCl2, das eingehend charakterisiert wurde. Das Reflexionsspektrum spricht für eine oktaedrische Anordnung der Liganden am Vanadin und damit für die Struktur eines Koordinationspolymeren. Diäthyläther bewirkt eine Spaltung der V-C-Bindung unter Bildung eines Vanadin(II)-chlorid-ätherates.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19754150203
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  • 2
    Electronic Resource
    Electronic Resource
    Koordinationsverbindungen von Bortrialkylen. II. Zur Komplexbildung zwischen Bortriallylen und tertiären Aminen (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 428 (1977), S. 225-230 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Coordination Compounds of Boron Trialkyls. II. On the Complex Formation between Boron Triallyls and Tertiary AminesIt is reported on complexes of triallyl, trimethallyl, and tricrotyl boron with N,N-,N′,N′-tetraethylethylene diamine, pyridine, and 2,2′-bipyridyl. Whilst only 1:1 complexes exist with pyridine, 1:1 and 2:1 complexes are formed with tetraethylethylene diamine. Bipyridyl reacts with triallyl boron with formation of the boronium salt [(all)2B(dipy)][B(all)4].
    Notes: Es wird über Reaktionen von Bortriallyl, -trimethallyl und -tricrotyl mit N,N,N′,N′-Tetraäthyläthylendiamin, Pyridin und 2,2′-Dipyridyl berichtet. Mit Pyridin werden stets 1:1-Komplexe, mit Tetraäthyläthylendiamin 1:1- und 2:1-Komplexe von EDA-Typ gebildet. Mit Dipyridyl reagiert Bortriallyl zu einem Boroniumsalz der Formel [(all)2B(dipy)][B(all)4].
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774280128
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  • 3
    Electronic Resource
    Electronic Resource
    Phenomenological model of thermal shock propagation in ceramic monolith (1996)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 42 (1996), S. 3458-3465 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A discrete model is used to study the behavior of shock propagation, crack formation, and crack propagation of a thin ceramic plate. This plate represents a wall of a channel in a monolithic structure. The model involves a spring-node formulation on a rectangular geometry, which approaches the continuum model correctly when the Poisson ratio is taken as 0.25. Viscous damping is also included. Shock waves originate from perturbations due to local ignition (hot spots), sudden quenching or other changes in operating and driving conditions. The shock wave propagates from the perturbed region. Internodal displacements are used to calculate strains, and the values are compared to a maximum strain associated with failure. Spring constants are set to zero when the maximum strain is exceeded. Reflection of compressional waves from free boundaries as tensional waves leads to enhanced crack formation near the free boundary. Shock waves attenuate much faster when the plate is precracked. Propagation velocities are lower for precracked plates, due to a decrease in (effective) Young's modulus. Velocities of pure compressional and shear waves compare quite well with theoretical values.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690421215
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  • 4
    Electronic Resource
    Electronic Resource
    Koordinationschemische Untersuchungen an Zinkdialkylen. XIII. Zur Existenz zinkorganischer Innerkomplexe (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 432 (1977), S. 221-230 
    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 Coordination Chemistry of Zinc Dialkyls. XIII. On the Existence of Organozinc ChelatesIt is reported on the synthesis, properties, and i.r., 1H n.m.r., and mass spectra of bis-4-methoxybutyl zinc, (CH3OCH2CH2CH2CH2)2Zn and bis-3-ethylmercaptopropyl zinc, (C2H5SCH2CH2CH2)2Zn. Both substances show mainly open alkyl chains. A chelate structure could be proved only in a minor quantity.
    Notes: Es wird berichtet über die Synthese, die Eigenschaften sowie die IR-, 1H-NMR- und Massenspektren von Bis-4-methoxybutylzink, (CH3OCH2CH2CH2CH2)2Zn und von Bis-3-äthylmercaptopropylzink, (C2H5SCH2CH2CH2)2Zn. Beide Verbindungen liegen vorwiegend in der offenkettigen Form vor. Eine Ausbildung von Chelatringen konnte nur in untergeordnetem Maße nachgewiesen werden.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774320131
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  • 5
    Electronic Resource
    Electronic Resource
    Spektroskopische Untersuchungen an Borallylverbindungen (1976)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 421 (1976), S. 89-96 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Spectroscopic Investigation of Allylboron CompoundsThe data of the IR and RAMAN spectra of triallyl-, tricrotyl- and trimethallyl-boron and their coordination compounds are listed and the vibrations assigned. In the discussion of the results data of tri-ethylboron are included.
    Notes: Die Ergebnisse der IR- und RAMAN-Spektren des Bortriallyls, -tricrotyls und -trimethallyls sowie derer Pyridinkomplexe werden angegeben und die Schwingungsfrequenzen zugeordnet. Bei der Diskussion der Ergebnisse werden die entsprechenden Daten des Bortriäthyls zu Vergleichszwecken mit einbezogen.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19764210112
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  • 6
    Electronic Resource
    Electronic Resource
    Aluminiumalkyle mit Heteroatomen. III. Über Reaktionen von Titan(IV)-chlorid mit Tris(trimethylsilylalkyl)-aluminium-Verbindungen (1976)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 426 (1976), S. 232-236 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Aluminium Alkyls with Heteroatoms. III. On Reactions of Titanium(IV) Chloride with Trimethylsilylmethyl Aluminium CompoundsTrimethylsilylmethyl titanium trichloride can be obtained by reaction of titanium(IV) chloride with tris(trimethylsilylmethyl)aluminium diethyl ether (1:1). Its catalytic activity for polymerisation of butadiene has been investigated.
    Notes: Trimethylsilylmethyl-titantrichlorid kann in reiner Form durch Umsetzung von Titan(IV)-chlorid mit Tris(trimethylsilylmethyl)aluminium-diäthylätherat gewonnen werden. Die katalytische Eignung der Verbindung zur Polymerisation von Butadien wird untersucht.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19764260213
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  • 7
    Electronic Resource
    Electronic Resource
    Concentration of active centres in the Ziegler-Natta polymerization of styrene (1988)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 39 (1988), S. 225-228 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Kinetik der Polymerisation von Styren mit dem Katalysatorsystem Nickelnaphthenat/BF3·Et2O/AlEt3 wird untersucht. Die Konzentration der aktiven Zentren wird nach verschiedenen Methoden aus dem Zahlenmittel des Polymerisationsgrades und der Menge des gebildeten Polymers berechnet.
    Notes: The kinetics of styrene polymerization with the nickel naphthenate/BF3·Et2O/AlEt3 catalyst system is studied. The concentration of active centres is calculated by various methods from the number average of the degree of polymerization and the amount of polymer.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1988.010390504
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  • 8
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Ziegler-Natta-Polymerisation des Butadiens unter Variation eines Nickelkatalysatorsystems (1986)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 37 (1986), S. 186-188 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: In the polymerization of butadiene with the catalyst system nickelnaphthenate/BF3.eth2O/AlEt3/diene the molar ratios Al/Ni, B/Ni, B/Al and Ni/diene were varied. Conversion or overall rate of polymerization, viscosimetric average of molecular mass and microstructure of the polybutadiene obtained were determined.
    Notes: Bei der Polymerisation des Butadiens mit dem Katalysatorsytem Nickelnaphthenat/BF3.eth2O/AlEt3/Dien wurden das Molverhältnis Al/Ni, B/Al und Ni/Dien variiert und Umsatz oder Bruttopolymerisationsgeschwindigkeit, das Viskositätsmittel der Molmasse und die Mikrostruktur des Polybutadiens verfolgt.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1986.010370316
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