- 2. 2. 1.
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A new class of bicyclic compounds containing a single silicon atom at the bridge, 2-exo- and endo-substituted 2-methyl-2-silabicyclo left bracket 2. 2. 1 right bracket heptanes, have been prepared from the corresponding 3-cyclopentenylmethylhydrosilane by the intramolecular hydrosilylation catalyzed by chloroplatinic acid, and their structures were unequivocally assigned by **1H and **1**3C NMR spectra. Dramatic crossover from inversion to retention was found in the phenylation of chlorosilanes with phenyllithium and phenylmagnesium bromide in ether. Regio- and stereoselective insertion of dichlorocarbene generated from phenyl(bromodichloromethyl)mercury, or from chloroform and sodium hydroxide in the presence of a phase transfer catalyst, into C//(//6//)-H//(//e//x//o//) bond of 2-silanorbornanes is observed.
- Hosomi,Mikami,Sakurai
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p. 2784 - 2794
(2007/10/02)
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- Studies of silyl and germyl Group VI species. Part IV. Dimethyl- and tetramethyl-disilyl chalcogenides and related species
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The symmetrically substituted disilyl chalcogenides (MenH3-nSi)2E where E = O, S, Se, Te; n = 0 -> 3, have been prepared and characterized spectroscopically and by cleavage reactions.The synthetic routes include reactions of halogenosilanes with water, mercury(II) sulfide, lithium telluride, and complex thio- and seleno-aluminates.The spectroscopic properties of the (MeH2Si)2E and (Me2HSi)2E species, which have not been reported previously, are discussed in some detail.
- Drake, John E.,Glavincevski, Boris M.,Hemmings, Raymond T.
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p. 2161 - 2166
(2007/10/02)
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