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  • 1
    Electronic Resource
    Electronic Resource
    Reaktionen an Silicium-Silicium-Bindungen, 2[1] Trichlorsilylierung von tert-Butyldichlorphosphan und tert-Butylbis(trimethylsilyl)phosphan mit Hexachlordisilan: Ein Weg zu neuen bifunktionellen (Trichlorsilyl)phosphanen (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 657-658 
    Details
    ISSN: 0009-2940
    Keywords: Trichlorosilylation ; Chlorophosphanes ; Silylphosphanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of Silicon-Silicon Bonds, 2[1]. - Trichlorosilylations of tert-Butyldichlorophosphane and tert-Butylbis(trimethylsilyl)phosphane with Hexachlorodisilane: Synthesis of New Bifunctional (Trichlorosilyl)phosphanesDi-tert-butyl(trimethylsilyl)phosphane (1) and tert-butylbis(trimethylsilyl)phosphane (3) react with one equivalent of hexachlorodisilane with exchange of one trimethylsilyl group by a trichlorosilyl group under mild conditions to give di-tert-butyl(trichlorosilyl)phosphane (2) and tert-butyl(trichlorosilyl)(trimethylsilyl)phosphane (4) in fair yields. tert-Butylbis(trichlorosilyl)phosphane (5) is available from tert-butyldichlorophosphane without organometallic reagents and solvents by simple reductive trichlorosilylation with the help of two equivalents of hexachlorodisilane. 5 is a useful precursor for phosphaalkane synthesis: with pivaloyl chloride, 5 leads to tert-butyl-[tert-butyl(trichlorosilyloxy)methylene]phosphane (6). From 4 with pivaloyl chloride mainly 6 and some known tert-butyl[tert-butyl(trimethylsilyloxy)methylene]phosphane (7) are formed.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921250318
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  • 2
    Electronic Resource
    Electronic Resource
    Bis[tris(trimethylsilyl)methyl]diselenid: Ein ungewöhnliches Dichalkogenid mit sterisch erzwungener trans-C2h-Konformation (1990)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 2325-2327 
    Details
    ISSN: 0009-2940
    Keywords: Diselenide, torsion angle/NMR, 77Se/Selenenyl halide ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bis[tris(trimethylsilyl)methyl] Diselenide: An Unusual Diselenide with Sterically Enforced trans-C2h ConformationDeselenation of bis[tris(trimethylsilyl)methyl] triselenide (1) with copper occurs with formation of bis[tris(trimethylsilyl)-methyl] diselenide (2) and minor amounts of 3,3,5,5-tetrakis(trimethylsilyl)-1,2,4-triselenolane (3). The structures of 2 and 3 have been studied by multinuclear NMR spectroscopy and by X-ray crystallography. The C—Se—Se—C moiety of 2 adopts an unusual antiperiplanar conformation. Cleavage of the Se — Se bond by iodine providing iodo[tris(trimethylsilyl)-methyl]selane (5) is complete with 2, but reversible with 1.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19901231215
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  • 3
    Electronic Resource
    Electronic Resource
    Lithium-(2,4,6-tri-tert-butylphenylselenid); Erzeugung, Struktur und Reaktionen unter Knüpfung von Se -P-, Se - C-, Se - Si-, Se - Sn- und Se - Au-Bindungen (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 1315-1320 
    Details
    ISSN: 0009-2940
    Keywords: Chalcogen-chalcogen bonds ; Selenium ; Selenide (2,4,6-tri-tert-butylphenyl)- ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Properties of Chalcogen-Chalcogen Bonds, XV1). - Lithium 2,4,6-Tri-tert-butylphenylselenide: Synthesis, Structure, and Reactions with Formation of Se - P, Se - C, Se - Si, Se - Sn, and Se - Au BondsBis(2,4,6-tri-tert-butylphenyl)diselenide (1) is reduced by lithium triethylhydridoborate to give lithium 2,4,6-tri-tert-butyl-phenylselenide (2) in high yield. 2 crystallizes with three molecules of tetrahydrofuran coordinated to lithium ([2(THF)3] ≡ 2a, space group P&1macr; Z =4). The monomeric compound 2a contains four-coordinate lithium bonded to two-coordinate selenium. 2 (LiSeR) reacts with the nonmetal and metal halides tBu2PCl, CH2Cl2, Me3SiCl, Me3SnCl, and Ph3PAuCl to give tBu2PSeR (3), RSeCH2Cl (4), (RSe)2CH2 (5), Me3SiSeR (6), Me3SnSeR (7), and the novel gold(I) selenophenolate derivative Ph3PAuSeR (8)(R = 2,4,6-tri-tert-butylphenyl).
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240602
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  • 4
    Electronic Resource
    Electronic Resource
    Spaltung sperriger Diarylditelluride mit Brom und Iod[1]; Strukturbestimmung an Et4N+ 2,4,6-(i-C3H7)3C6H2TeI-2 (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 761-766 
    Details
    ISSN: 0009-2940
    Keywords: Tellurium compounds ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Cleavage of Bulky Diaryl Ditellurides with Bromine and Iodine; Crystal Structure of Et4N+ 2,4,6-(i-C3H7)3C6H2TeI-2Bis(2,4,6-triisopropylphenyl) ditelluride (1a), obtained from 2,4,6-triisopropylphenylmagnesium bromide with tellurium followed by oxidation with oxygen, and bis(2,4,6-tri-tert-butylphenyl) ditelluride (1b) react with equimolar amounts of bromine and iodine to provide new monomeric arenetellurenyl halides 2,4,6-R3C6H2TeX (2a, b, 3a, b: R = i-C3H7, t-C4H9; X = Br, I). Both tellurenyl iodides are thermally more stable than the corresponding bromides. Green 2,4,6-(i-C3H7)3C6H2TeI (3a) reacts with Et4N+I- to give the stable, red adduct Et4N+ 2,4,6-(i-C3H7)3C6H2TeI-2 (4a). An X-ray crystal structure determination of 4a revealed a T-shaped structure of the hypervalent aryldiiodotellurate(II) anion. Iodide-ion transfer between aryldiiodotellurate(II) and arenetellurenyl iodide is a fast process (1H-NMR time scale). 125Te-NMR data of this anion and of tellurenyl halides are compared with those of the ditellurides and of lithium benzenetellurolates (LiTeR·(THF)x).
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921250402
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  • 5
    Electronic Resource
    Electronic Resource
    Eigenschaften von Chalkogen-Chalkogen-Bindungen, XVII. Di-und Trisulfane mit sterisch anspruchsvollen Alkyl-Substituenten: Das erste trans1-Dialkyldisulfan (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 1355-1359 
    Details
    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
    URL: http://dx.doi.org/10.1002/cber.19931260614
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  • 6
    Electronic Resource
    Electronic Resource
    Reaktionen an Silicium-Silicium-Bindungen, 3. Ein neuer Weg zur Knüpfung von Si - Ge-und Si - Sn-Bindungen: Hexachlordisilan-Spaltung von Organometallphosphanen und (Trichlorsilyl)phosphan-RecyclingHerrn Prof. Dr. Dr. h.c. U. Wannagat zum 70. Geburtstag gewidmet. (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 1115-1117 
    Details
    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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260508
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  • 7
    Electronic Resource
    Electronic Resource
    Eigenschaften von Chalkogen - Chalkogen-Bindungen, XVII. - Di- und Trisulfane mit sterisch anspruchsvollen Alkyl-Substituenten: Das erste trans-Dialkyldisulfan (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 1811-1811 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260809
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  • 8
    Electronic Resource
    Electronic Resource
    2,3-Di-tert-butyl-1-telluradiphosphiran und verwandte Phosphor - Tellur-Heterocyclen (1993)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 1083-1087 
    Details
    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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19936190619
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