29865-40-5Relevant articles and documents
A New Synthesis and the Molecular Structure of Trimethyl(silylmethylene)phosphorane in the Gas Phase, Determined by Electron Diffraction
Ebsworth, E. A. V.,Rankin, David W. H.,Zimmer-Gasser, Beate,Schmidbaur, Hubert
, p. 1637 - 1645 (2007/10/02)
Trimethyl(silylmethylene)phosphorane (1) has been prepared in a reaction of H3SiCH2CH2Cl and (CH3)3P=CH2 in a molar ratio 1 : 2.C2H4 is evolved in a β-elimination process, followed by formation of +Cl- in a transylidation step. - The molecular structure of (CH3)3P=CHSiH3 in the gas phase has been determined by electron diffraction.Principal bond lengths (ra) are: P-C = 180.7(8), P=C = 165.3(11), Si-C = 185.2(20) pm.The angles between the P-C(methyl) bonds are 103.4(13) deg and the Si-C=P angle is 123.4(8) deg, consistent with a planar configuration of the methylene carbon atom.The molecule adopts a conformation in which the Si-C bond is twisted 25 deg from a position in which it eclipses one P-C bond, but there is a large amplitude torsional vibration about the P-C bond.
