The photolysis of phenyl-substituted trigermanes affords digermanes and germylenes. Trapping experiments, matrix isolation, and laser-photolysis studies indicate that the photoreaction of these compounds involves both the extrusion of germylenes and the formation of germylradicals. The mechanism by which the germylenes are generated is discussed.
Assistance nucleophile dans des reactions d'organo-halogeno- et -halogeno-hydrogermanes: germylanions, germylenes, derives fonctionnels du germanium
作者:P. Riviere、A. Castel、J. Satge
DOI:10.1016/s0022-328x(00)87639-1
日期:1982.6
New photochemical routes to germylenes and germenes and kinetic evidence concerning the germylene-diene addition mechanism
作者:Kevin L. Bobbitt、Vincent M. Maloney、Peter P. Gaspar
DOI:10.1021/om00054a046
日期:1991.8
Upon 254-nm irradiation of phenylbis(trimethylsilyl)germanes, there is competition between two germylene-forming reactions, the unexpected elimination of phenyltrimethylsilane and the elimination of hexamethyldisilane. Irradiation of a phenylmonosilylgermane PhGeMe2SiMe3 leads to predominant elimination of PhSiMe3, forming dimethylgermylene Me2Ge:, accompanied by migration of Me3Si to the ortho position of the phenyl ring, forming a germene. Laser flash photolysis of PhGeMe2SiMe3 is a convenient source of Me3Ge:, and rate constants are reported for Me2Ge: addition to a series of dienes and other substrates. The kinetic data are in accord with 1,2-addition as the dominant pathway for addition of Me2Ge: to 1,3-dienes.