Reactions of diboron tetrahalides with some unsaturated organometallic compounds
作者:T.D. Coyle、J.J. Ritter
DOI:10.1016/s0022-328x(00)93848-8
日期:1968.5
Tetrachloro- and tetrafluorodiborane(4) add to the double bond in a number of vinyl derivatives of boron, carbon, silicon, germanium, and tin to form 1,2-bis(dihaloboryl)ethyl derivatives. Most of the compounds are stable in vacuo at temperatures in excess of 150°. Tetrachlorodiborane(4) undergoes addition considerably more readily than does tetrafluorodiborane(4). Relative rates of addition have been determined
A new cage monovinylgermasilsesquioxanes of the general formula 1,
in which R1 are the same and represent a C1 to C6 alkyl group or a cyclopentyl or cyclohexyl group or a phenyl group. The invention also relates to the method of synthesis of cage monovinylgermasilsesquioxanes of the general formula 1.
New vinylgermanium cubic derivatives of silsesquioxanes (i.e., monovinylhepta(alkyl, phenyl)-germasilsesqiuoxanes and (dimethylvinylgermoxy)-heptaisobutylsilsesquioxanes) were synthesized and characterized by spectroscopic methods. The first ruthenium germasilsesquioxyl complexes were also prepared via stoichiometric reaction of RuHCl(CO)(PPh3)(3) with the above-mentioned vinylgermanium derivatives of silsesquioxanes, and their structures were determined by spectroscopic and X-ray analyses. The initial ruthenium complex as well as the above-mentioned Ge-Ru complexes were tested as catalysts, in the germylative coupling with olefins, and proved to be active in the case of (dimethylvinyl)-germoxyheptaisobutylsilsesquioxane but showed no activity toward vinylgermasilsesquioxanes. A general mechanism for the germylative coupling of the two vinylgermanium derivatives of silsesquioxanes is presented.