分子内和分子间供体稳定的硅烷二基配合物(C 6 H 4 CH 2 NMe 2 -2)(Cl)Si的合成与化学行为ML n(4,ML n = Cr(CO)5 5,ML n = Fe(CO)4),(C 6 H 5 HC CH)(Cl)Si = ML n ·OP(NMe 2)3(21,ML n = Cr(CO)5 ; 22,ML n = Fe(CO)4)和(C 6讨论了H 5 HC CH)(C 6 H 5)Si Fe(CO)4 ·OP(NMe 2)3(23)。化合物4和5中的氯原子被不同的亲核试剂进行亲核取代,导致产生了更多种类的(C 6 H 4 CH 2 NMe 2 -2)(R)Si ML n(ML n = Cr) (CO)5: 7, R = CH 3;9,R = C 6。高5 ; 11,R = P(C 6 H 5)2;R = P(C 6 H 5)2。13,R = CH CH 2。ML n=
Hydrosilylation of alkynes catalyzed by platinum on carbon
作者:Moni Chauhan、Brian Jay Hauck、Lindsay P Keller、Philip Boudjouk
DOI:10.1016/s0022-328x(01)01103-2
日期:2002.2
Hydrosilylation of terminal and internal alkynes with chlorosilanes, alkylsilanes, and alkoxysilanes catalyzed by platinum on carbon are discussed. The yields of the isolated vinylsilanes are high and the selectivity of the product depends on the silane used. Hydrosilylation of alkynes with chlorosilanes produced the beta-trans vinylsilanes, while alkyl and alkoxysilanes produced two or three vinylsilane isomers. The selectivity of the catalyst platinum on carbon is similar to Karstedt's catalyst in the reaction of phenylacetylene with triethylsilane or triethoxysilane. High resolution electron microscopy showed colloidal platinum to be present in these reactions. (C) 2002 Published by Elsevier Science B.V.
Novel inter- and intra-molecular donor-stabilized 1-metalla-2-sila-1,3-dienes
The synthesis of the inter- and intra-molecular donor-stabilized 1-metalla-2-sila-1,3-dienes Cl(H2C=CH)Si=ML(n) . OP(NMe(2))(3) [ML(n) = Fe(CO)(4) 3a, Cr(CO)(5) 3b], Ph(PhHC=CH)Si=Fe(CO)(4) . OP(NMe(2))(3) 3c and (C(6)H(4)CH(2)NMe(2)-2)(H2C=CH)Si=ML(n) [ML(n) = Fe(CO)(4) 6a, Cr(CO)(5) 6b] is described; the X-ray structures of compounds 3c and 6b are reported.