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  • Inorganic Chemistry  (4)
  • 1995-1999
  • 1990-1994  (4)
  • 1993  (4)
  • 1
    ISSN: 0009-2940
    Keywords: Disulfanes ; Trisulfanes ; Bond conformations, S—S ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Properties of Chalcogen-Chalcogen Bonds, XVII[1]. - Di-and Trisulfanes with Sterically Congested Alkyl Substituents: The First trans1-DialkyldisulfaneBis[tris(trimethylsilyl)methyl]trisulfane (1) is obtained from tris(trimethylsilyl)methyllithium and sulfur with subsequent oxidation by oxygen or from tris(trimethylsily)methanethiol with sulfur dichloride. The solid trisulfane contains a transoid (helical) C—S-S—S-C backbone without severe distortion from steric strain. Desulfuration of the byproduct bis[tris(trimethylsilyl)methyl]tetrasulfane (2) with mercury provides 1, but further desulfuration of 1 to bis[tris(trimethylsilyl)1-methyl]disulfane (3) has not been achieved. 3 was isolated after oxidation of lithium tris(trimethylsilyl)methanethiolate with bromine. 3 contains a trans1-C—S-S—C moiety with an unusually long S—S bond (210-211 pm). The less crowded bis(triphenylmethyl)disulfane (4) contains a “normal” C—S-S—C moiety with anticlinal conformation (torsion angle - 110°).
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0009-2940
    Keywords: Germanes, silyl ; Stannanes, silyl ; Phosphanes, silyl ; Organometallphosphanes ; Recycling ; Si - Si bond ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions at Silicon-Silicon Bonds, 3[1]. - A New Path to Si - Ge and Si - Sn Bonds: Hexachlorodisilane Cleavage of Organometalphosphanes and (Trichlorosilyl)phosphane RecyclingTrimethyl(trichlorsilyl)germane and -stannane (4, 5) have been prepared through hexachlorodisilane cleavage by germyl-and stannylphosphanes R2PMMe3 (1, 2, R=i1-C3H7, t1-C4H9; M=Ge, Sn). The (trichlorosilyl)phosphane byproduct R2PSiCl3 (3) may be recycled by transmetalation and methylation steps to provide starting germylphosphane (MeGeCl3, 2 MeLi) and stannylphosphane (Me3SnCl, 3 MeLi).
    Additional Material: 1 Tab.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 1811-1811 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 1083-1087 
    ISSN: 0044-2313
    Keywords: Phosphorus-tellurium heterocycles ; 2,3-di-tert-butyl-1-telluradiphosphirane ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 2,3-Di-tert-butyl-1-telluradiphosphirane and related Phosphorus - Tellurium Heterocycles2,3-Di-tert-butyl-1-telluradiphosphirane was isolated in pure state by trap to trap condensation after reaction of 1,2-Di-tert-butyl-1,2-dichlorodiphosphane with sodium telluride in pentane suspension. The telluradiphosphirane and other P—Te heterocycles (t-BuP)nTem (n = 2, m = 1; n = 3, m = 1,2; n = 4, m = 1,2) are formed from 1,2-Di-tert-butyl-1,2-dichlorodiphosphane or tert-butyldichlorophosphane with bis(trimethylsilyl)telluride and from the reaction of tert-butylbis(trimethylsilyl)phosphane with elemental tellurium. The proposed structures of the P—Te heterocycles are based on 31P- and 125Te-n.m.r. and MS data
    Notes: 2,3-Di-tert-butyl-1-telluradiphosphiran läßt sich nach Umsetzung von 1,2-Di-tert-butyl-1,2-dichlordiphosphan mit Natriumtellurid in Pentan durch Umkondensation in 26% Ausbeute rein isolieren. Das Telluradiphosphiran entsteht neben anderen Phosphor - Tellur-Heterocyclen (t-BuP)nTem (n = 2, m = 1; n = 3, m = 1,2; n = 4, m = 1,2) bei den Umsetzungen von 1,2-Di-tert-butyl-1,2-dichlordiphosphan oder tert-Butyldichlorphosphan mit Bis(trimethylsilyl)tellurid sowie bei den Reaktionen von tert-Butylbis(trimethylsilyl)phosphan oder 1,2-Di-tert-butyl-1,2-dichlordiphosphan mit elementarem Tellur. Die Strukturvorschläge für die neuen Phosphor-Tellur-Heterocyclen basieren auf 31P- und 125Te-NMR- und Massenspektren.
    Additional Material: 1 Ill.
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