Characterisation of bis-methylgermanium and bis-methylsilicon carbodi-imides and their reactivity with protic reagents
作者:John E. Drake、Raymond T. Hemmings、Ernest Henderson
DOI:10.1039/dt9760000366
日期:——
bismethylsilicon carbodi-imides have been prepared in high yield by halide metathesis reactions with lead(II), silver(I), or silicon(IV) species. The new derivatives in the series of general formula (MenH3 –nMN:)2C (MSi or Ge; n= 1, 2 or 3) have been characterised by 1H n.m.r., i.r., and Raman spectroscopy as well as mass spectrometry and cleavage reactions. The utility of the germanium carbodi-imides as synthetic
通过与铅(II),银(I)或硅(IV)物种进行卤化物易位反应,可以高收率制备双甲基锗和双甲基硅碳二亚胺。通式(Me n H 3 – n MN :)2 C(M Si或Ge;n = 1、2或3)系列中的新导数的特征是1H nmr,ir和Raman光谱以及质谱和裂解反应。第六种锗原子容易裂解Ge-N键,导致硫属锗烷及其相关衍生物的形成(Me n H 3 – n葛)2 E(E = O,S,Se或Te)和Me ñ ħ 3 - ñ GESR(R = Me中,卜吨,pH值,的MeC(O),或-CH 2 CH 2 - )。比较研究表明,在碳碳化二亚胺硅中,Si-N键不易受较重的硫属元素醇分解的影响。
Mechanism of the Reaction of (Arylthio)trimethylgermanes with 1-Aryl-1-bromoethanes—Kinetic and Stereochemical Studies—
Kinetic and stereochemicalstudies have been conducted on the reaction of (arylthio)trimethylgermanes with 1-aryl-1-bromoethanes. The reaction has been found to obey a first-order kinetic equation. The rates of the reaction of the substituted arylethanes were well-correlated with σ+ constants. Optically active 1-bromo-1-phenylethane gave racemic phenyl 1-phenylethyl sulfide by the reaction with trim
The Reaction of (Arylthio)trimethylgermanes with Various Haloalkanes —Steric Effect on the Reaction Mechanism—
作者:Seizi Kozuka、Takemi Nitta
DOI:10.1246/bcsj.63.2843
日期:1990.10
conducted on the reactions of (arylthio)trimethylgermanes with various haloalkanes. Bimolecular nucleophilic attack of the sulfur atom has been found as the mechanisms for the reactions with normal haloalkanes while the mechanism was found to deviate from bimolecular attack to unimolecular ionization of the haloalkane, dependent on the structure of the alkyl groups with increasing of the steric hindrance