Organometallic compounds with metal-metal bonds. XIV. Reactions of cyclopentadienyldicarbonylcobalt with halides and organometallic halides of germanium(IV) and tin(IV)
Palladium-catalyzed stille couplings of aryl-, vinyl-, and alkyltrichlorostannanes in aqueous solution
作者:Roopa Rai、Katherine B. Aubrecht、David B. Collum
DOI:10.1016/0040-4039(95)00485-u
日期:1995.5
Stille coupling of water-soluble aryl and vinyl halides with alkyl-, aryl-, and vinyltrichlorostannane derivatives (RSnCl3) are effected in aqueous solution using a catalyst generated in situ from PdCl2 and KOH both with and without added PhP(m-C6H4SO3Na)2. The yields are generally good to excellent, although some limitations of the protocol are described.
的Stille的水溶性的芳基和乙烯基卤化物与烷基连接,芳基- ,和vinyltrichlorostannane衍生物(RSnCl 3)使用所生成的催化剂在水溶液中进行原位从的PdCl 2和KOH具有和不具有添加的PHP(米-C 6 H 4 SO 3 Na)2。尽管描述了协议的一些局限性,但收率通常良好或优异。
Vinylgermane: preparation and polymerization
作者:F.E. Brinckman、F.G.A. Stone
DOI:10.1016/0022-1902(59)80211-6
日期:1959.1
Reduction of vinyltrichlorogermane with lithium aluminium hydride yields vinylgermane [b.p. −3·5° (extrap.)], a compound which polymerizes to a white solid in daylight, especially in the presence of mercury. Polymeric vinylgermane commences measurable decomposition above 275°, giving hydrogen with lesser amounts of ethylene and germane. Like polymeric vinylsilane, polyvinylgermane is insoluble in a
Reactions of Allenyltri-<i>n</i>-butylstannane with Halides of Phosphorus, Arsenic, Antimony, Germanium, Tin, and Boron. Preparation of Propargylic and/or Allenic Derivatives
作者:Jean-Claude Guillemin、Karine Malagu
DOI:10.1021/om990543l
日期:1999.12.1
tetrachloride to give only the allenic product, even when the reaction was performed and analyzed at low temperature (−80 °C). The propargylic intermediate was observed with the antimony and tin compounds when a substituted derivative (e. g. Vi2SbCl, ViSnCl3) was used. The reduction of the propargylic halide products prior to their isomerization gave the corresponding primary propargylic phosphine, arsine
organotin complexes (2a–j). These organotin complexes disproportionate into diorganostannanes and inorganic coordination compounds containing two O,O-chelated ligands (3a–c). All the complexes were characterized by multinuclear NMR spectroscopy in solution and X-ray diffraction in crystalline state (2a, 2b, 2j, 3b, 3c). It was found that disproportionation reaction proceeded only for very well dissolved
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