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  • 1
    Electronic Resource
    Electronic Resource
    Expansion of Three-Membered Rings by the Insertion of Methyl(methylidene)borane MeB:C(SiMe3)2 (1995)
    s.l. : American Chemical Society
    Organometallics 14 (1995), S. 1507-1509 
    Details
    ISSN: 1520-6041
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/om00003a061
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  • 2
    Electronic Resource
    Electronic Resource
    Decamethyl-7-thia-hexasilanorbornan (CH3)10Si6SBeiträge zur Chemie der Silicium-Schwefel-Verbindungen, 37. Mitteilung. - 36. Mitteilung: [1]. (1985)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 97 (1985), S. 978-979 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General 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/ange.19850971120
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  • 3
    Electronic Resource
    Electronic Resource
    Contributions to the Chemistry of Silicon - Sulphur Compounds. 66. Synthesis, crystal and molecular structure of bis(tri-tert-butoxysilanethiolato)(acetonitrile)cobalt(II)[(t-C4H9O)3SiS]2Co(NCCH3) (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 904-908 
    Details
    ISSN: 0044-2313
    Keywords: Cobalt ; silanethiolate ; thiolate complex ; synthesis ; structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Beiträge zur Chemie der Silicium - Schwefel-Verbindungen. 66 Darstellung, Kristall- und Molekülstruktur von Bis(tri-tert-butoxysilanthiolato)(acetonitril)cobalt(II) [(t-C4H9O)3SiS2Co(NCCH3)Die Titelverbindung [(t-C4H9O)3SiS]2Co(NCCH3) 1 wurde durch Umsetzung von wasserfreiem Cobalt(II)-dichlorid mit Tri-tert-butoxysilanthiol und Triethylamin in Acetonitril-Lösung dargestellt. Die Verbindung kristallisiert in dunkelblauen orthorhombischen Plättchen mit a = 17,779(4), b = 45,363(9), c = 9,096(2) Å, Raumgruppe Fdd2 und Z = 8. Die Struktur wurde mittels Patterson-Synthese gelöst und bis R = 0,0343 verfeinert.Die Kristalle sind aus einkernigen Komplexen aufgebaut. Kobalt ist durch zwei Schwefel, zwei Sauerstoff und ein Stickstoff in einer verzerrten trigonal bipyramidaler Struktur fünffach koordiniert. Die wichtigsten Abstände und Winkel sind: Co—S, 2,2680(7); Co—N, 2,065(4); Co—O1, 2,283(2); S—Si, 2,0666(8) Å; S—Co—S′, 119,14(4); N—Co—S, 120,43(2); O1—Co—O1′, 178,81(10)°.
    Notes: The title compound [(t-C4H9O)3SiS]2Co(NCCH3)]1 was obtained by reaction of anhydrous cobalt(II) chloride with tri-tert-butoxysilanethiol and triethylamine in acetonitrile as a solvent. The compound crystallizes as deep-blue orthorhombic plates with a = 17.779(4), b = 45.363(9), c = 9.096(2) Å, space group Fdd2 and Z = 8. The structure was solved by Patterson synthesis and refined to the R value of 0.0343.The crystal consists of mononuclear complexes in which the cobalt atom is five-fold coordinated to two sulphurs, two oxygens and one nitrogen in a distorted trigonal bipyramidal arrangement. The relevant bond distances and angles are: Co—S, 2.2680(7); Co—N, 2.065(4); Co—O1, 2.283(2); S—Si, 2.0666(8) Å; S—Co—S′, 119.14(4); N—Co—S, 120.43(2); O1—Co—O1′, 178.81(10)°.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210533
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  • 4
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie der Silicium-Schwefelverbindungen. XXXVIII. Hexa-(tri-t-butoxy)disiloxan und Hexa-(tri-t-butoxy)disilthian (1986)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 533 (1986), S. 165-174 
    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 Silicon Sulfur Compounds. XXXVIII. Hexa(tri-t-butoxy)disiloxane and Hexa(tri-t-butoxy)disilthianeHexa(tri-t-butoxy)disiloxane 1 and Hexa(tri-t-butoxy)disilthiane 2 were prepared by reaction of R3SiONa with R3SiCl and R3SiSNa with R3SiCl (R = tri-t-butoxy), respectively. The mass spectra show characteristic series of fragments. A large 29Si n.m.r. chemical shift of about  - 103.55 ppm is observed with 1, whereas the value of 2 is  - 75.99 ppm. The crystal structure analysis of 1 result first in a colinear molecule (Si—;O—;Si = 180°) with 1 symmetry and relative short mean bond lengths of about d(Si—;O) = 155.6 pm, but with large and strong anisotropic ellipsoids. Their quantitative rigid body analyses yield decisive corrections, namely a bent molecule with an Si—;O—;Si angle of 144.0° and d̄corr = 163.5 pm. Molecule 2 is also bent as expected (Si—;S—;Si = 110.5°, d̄(Si—;S) = 211.9 pm and after rigid body correction 108.0° and dcorr = 215.2 pm, respectively). The results of our investigations will be discussed corresponding to the energy differences of the varying configurations at the bridging atoms.
    Notes: Hexa(tri-t-butoxy)disiloxan 1 bzw. hexa(tri-t-butoxy)disilthian 2 werden beim Umsatz von R3SiONa mit R3SiCl bzw. von R3SiSNa mit R3SiCl erhalten (R = tri-t-butoxy). Die Massenspektren ergeben charakteristische Serien von Bruchstücken. Das 29Si-NMR-Spektrum von 1 weist eine große chemische Verschiebung von  - 103,55 pm auf, während für 2 diese Verschiebung  - 75,99 ppm beträgt. Die Kristallstrukturanalyse von 1 ergab zunächst ein lineares Molekül (Si—;O—;Si = 180°) mit l̄1-Symmetrie und kurzen mittleren Bindungsabständen d(Si—;O) = 155,6 pm, jedoch mit großen und stark anisotropen thermischen Ellipsoiden. Deren quantitative Analyse im Modell starrer Körper erbrachte dann entscheidende Korrekturen, nach denen tatsächlich ein gewinkeltes Molekül mit Si—;O—;Si = 144,0° und d̄korr = 163,5 pm vorliegt. Auch Molekül 2 ist (erwartungsgemäß) gewinkelt mit Si—;S—;Si = 110,5° und d̄(Si—;S) = 211,9 pm bzw. nach Korrektur auf die thermische Bewegung als starrer Körper 108,0° und 215,2 pm. Die Ergebnisse werden im Zusammenhang mit den Energiedifferenzen der verschiedenen Konfigurationen an den Brückenatomen diskutiert.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19865330220
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  • 5
    Electronic Resource
    Electronic Resource
    The alcoholysis and phenolysis of isosteric isobutyl(isopropoxy)silanethiols catalyzed by 4-dimethylaminopyridine or triethylamineContributions to the chemistry of silicon-sulfur compounds 63[1]. (1997)
    New York, NY [u.a.] : Wiley-Blackwell
    Heteroatom Chemistry 8 (1997), S. 245-251 
    Details
    ISSN: 1042-7163
    Keywords: Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The reaction rates of alcoholysis of isosteric silanethiols iBun(iPrO)3-nSiSH, n = 0-3, in the presence of the tertiary amines, 4-dimethylaminopyridine (DMAP) or triethylamine (NEt3), were measured in benzene and in acetonitrile solutions under pseudo-first-order conditions. The catalytic activity of NEt3 is low. The alcoholysis catalyzed by DMAP shows features of a nucleophilic catalysis. The protonation of the catalyst (DMAP or NEt3) by silanethiols causes substantial deviations from pseudo-first-order kinetics. Phenolysis of silanethiols is effectively catalyzed by both DMAP and NEt3. © 1997 John Wiley & Sons, Inc. Heteroatom Chem 8: 245-251, 1997.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Addition von Silylenen an Iminoborane (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 1073-1078 
    Details
    ISSN: 0009-2940
    Keywords: Iminoboranes ; Silylenes ; Azasilaboriridin ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Addition of Silylenes to Iminoboranes[1]Photolytically generated silylenes SiMe2 and SiMes2 are treated with iminoboranes XB≡NtBu [X = tBu, Me3Si(tBu)N, iPr2N: 1a-c]. The products from SiMe2 and 1a are the four-and six-membered rings [-B(tBu)=N(tBu)-SiMe2-SiMe2-] (3a) and [-B(tBu)=N(tBu)—B(tBu)N(tBu)-SiMe2-SiMe2-] (4a), depending on the conditions of the photolysis. SiMe2 reacts with 1b to give the six-membered ring [-BX=N(tBu)-SiMe2-BX=N(tBu)-SiMe2-] (4b). From SiMes2 and 1a,c the three-membered rings [-BX=N(tBu)-SiMes2-] are formed (2a: space group Pbca; 2c: space group P1): SiMes2 reacts with 1b to yield the unexpected four-membered BNSiN ring [B(Mes)N(tBu)-Si(Mes)(SiMe3)-N(tBu)] (5: space group P1).
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921250514
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  • 7
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie der Silicium-Schwefel-Verbindungen. XXXVI [1]. Das Quecksilber(II)-bis-tri-tert-butoxysilanthiolat (1985)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 531 (1985), S. 153-157 
    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 Silicon-Sulfur Compounds. XXXVI. Mercury(II)-bis-tri-tert-butoxysilanethiolateMercury(II)bis-tri-tert-butoxysilanethiolate was obtained in reaction of HgO with (t-C4H9O)3SiSH. This compound forms colourless triclinic plates. The central S—Hg—S bond element is linear, with Hg—S bond distance of 231.6 pm. The Hg atom is coordinated by two oxygens of the two butoxy groups, with Hg—O distance of 287.8 pm. The mean bond angle at the two-bonded sulfur is 95.6°. (Space group P1; a = 930.8, b = 944.0, c = 1204.8 pm, α = 100.34, β = 97,64, γ = 116.50°; Z = 1; R = 0.035; 3390 reflections hkl).
    Notes: Quecksilber(II)-bis-tri-t-butoxysilanthiolat wurde in einer Umsetzung von HgO mit (t-C4H9O)3SiSH erhalten. Die Verbindung kristallisiert in farblosen, triklinen Plättchen. Die zentrale S—Hg—S Bindungseinheit ist linear mit d(Hg—S) = 231,6 pm. Das Hg-Atom ist von O-Atomen der tert-Butoxygruppen koordiniert, d(Hg—O) = 287,8 pm. Der Bindungswinkel am zweibindigen Schwefel beträgt 95,6°. (Raumgruppe P1; a = 930,8, b = 944,0, c = 1204,8 pm, α = 100,34, β = 97,64, γ = 116,50°; Z = 1, R = 0,035; 3390 Reflexe hkl).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19855311221
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  • 8
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie der Silicium-Schwefel-Verbindungen. 46 [1]. 29Si-NMR-chemische Verschiebungen von Trialkoxysilylthioderivaten der Permethylpolysilane (1987)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 551 (1987), S. 196-202 
    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 Silicon-Sulphur Compounds. 46. 29Si-N.M.R. Chemical Shifts of Trialkoxysilylthio Derivatives of Permethylpolysilanes29Si-N.M.R. chemical shifts of trialkoxysilythio derivatives of permethylpolysilanes of the two series: α, ω-(RO)3SiS(SiMe2)nSSi(OR)3, n = 2, 3, 4, 6 and 1-(RO)3SiS(SiMe2)nMe, n = 2, 4; R = i-Pr, t-Bu and also 31C-NMR shifts are given.The relationship of 29Si-NMR chemical shift from the netto charge at the silicon atom q(Si) which value has been corrected according to the Sandorfy C quantum-chemical model is discussed.The greater reduction of the electron density at silicon in compounds with Si—X bond (X = S, P, Cl) has been explained by a conjugation of the lone of sulphur with the Si—X bonding pair.
    Notes: 29Si-NMR-chemische Verschiebungen von Trialkoxysilylthioderivaten von Permethylpolysilanen der Reihen: α, ω-(RO)3SiS(SiMe2)nSSi(OR)3, n = 2, 3, 4, 6 und 1-(RO)3SiS(SiMe2)nMe, n = 2, 4; R = i-Pr, t-Bu wie auch 13C-NMR-Werte werden angegeben.Die Abhängigkeit der 29Si-NMR-chemischen Verschiebung von einer nach dem quantenchemischen Sandorfy C Modell korrigierten Nettoladung q(Si) wird diskutiert.Die stärkere Reduktion der Elektronendichte am Silicium in Verbindung mit einer Si—X-Bindung (X = S, P, Cl) wird durch eine Konjugation des freien Elektronenpaares des Schwefels mit den Si—X-Bindungs-Elektronen erklärt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19875510822
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  • 9
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie der Silicium-Schwefel-Verbindungen. 47 [1]. Über die protolytische Spaltung der Si—S-Bindung in Trialkoxysilanthiolen und Darstellung von Trialkoxyorganoxysilanen (1987)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 551 (1987), S. 203-208 
    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 Silicon-Sulphur Compounds. 47. On Protolytic Splitting of the Si—S Bond of Trialkoxysilanethiols and Preparation of TrialkoxyorganoxysilanesThe conditions of the reaction of protolytic splitting of the Si—S bond of (RO)3SiSH by alcohols or phenols were optimized by use of pyridine. Some new trialkoxyorganoxysilanes have been prepared. By kinetic measurements the relationship between the structure of phenol and reaction rate were elucidated. The role of pyridine in the reaction mechanism has been proposed as nucleophile catalysis.
    Notes: Die Reaktionsbedingungen der protolytischen Spaltung der Si—S-Bindung in (RO)3SiSH durch Alkohole oder Phenole wurden durch Anwendung von Pyridin optimiert. Einige neue Trialkoxyorganoxysilane wurden erhalten.Durch kinetische Messungen wurde ein Zusammenhang zwischen der Konstitution des Phenols und Reaktionsgeschwindigkeit ermittelt. Die Rolle von Pyridin im Reaktionsmechanismus wurde als nukleophile Katalyse erklärt.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19875510823
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  • 10
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie der Silicium-Schwefel-Verbindungen. 48 [1]. Untersuchungen über katalytische Wirkung von Pyridin- Derivaten und N-haltigen Heterocyclen auf die Alkoholyse der Si—S-Bindung von Trialkoxysilanthiolen (1987)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 551 (1987), S. 209-214 
    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 Silicon-Sulphur Compounds. 48. Investigations on Catalytic Activity of Pyridine Derivatives and N-containing Heterocycles on the Alcoholysis of the Si—S Bond of TrialkoxysilanethiolsThe effectiveness of pyridine derivatives and N-containing heterocycles on the ethanolysis of trialkoxysilanethiols has been investigated by kinetic measurements. Imidazol, 2-methylimidazol and 4-dimethylaminopyridine proved to be especially efficient. The addition of triethylamine reduces the rates of catalysed reactions significantly. The results were discussed in meaning of a nucleophilic catalysis.
    Notes: Die Wirksamkeit von Pyridin-Derivaten und N-haltigen Heterocyclen auf die Ethanolyse der Si—S-Bindung von Trialkoxysilanthiolen wurde durch kinetische Messungen untersucht. Als besonders wirksam erwiesen sich Imidazol, 2-Methylimidazol und 4-Dimethylaminopyridin. Die Zugabe von Triethylamin setzt die Reaktionsgeschwindigkeit von katalysierten Umsetzungen bedeutend herab. Die Ergebnisse werden im Sinne einer nukleophilen Katalyse diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19875510824
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