The molecular structure of chloromethylphosphine, CClH2PH2, as determined by gas-phase electron diffraction and ab initio computations
作者:Paul T. Brain、David W.H. Rankin、Heather E. Robertson、Anthony J. Downs、Tim M. Greene、Matthias Hofmann、Paul von RaguéSchleyer
DOI:10.1016/0022-2860(94)08529-q
日期:1995.6
Abstract The gas-phase structure of chloromethylphosphine, CClH 2 PH 2 , has been determined by electron diffraction employing constraints derived from ab initio computations at the CISD(fc) 6−31+ G ∗∗ level. At 293K, the compound exists in two conformations, anti and gauche (phosphorus lone pair relative to the CCl bond); the mole fraction of the gauche conformer is 0.22(5). Important experimental
摘要 氯甲基膦的气相结构 CClH 2 PH 2 已通过电子衍射确定,采用从 CISD(fc) 6−31+ G ∗ 水平的从头计算得出的约束条件。在 293K 时,该化合物以两种构象存在:anti 和 gauche(磷孤对相对于 CCl 键);gauche 构象异构体的摩尔分数是 0.22(5)。anti和gauche构象异构体的重要实验结构参数(rg /pm, ∠ α /deg)分别为(没有esds的值表示两种构象异构体的参数之间的差异固定在理论值):r(C P) = 186.3(3), 187.4; r (CCl) = 179.1(5), 179.0; r (PH) = 141.5(4), 142.9; PCCl = 115.7(1), 107.8(5) [ CISD(fc) 6−31+ G ∗∗ 116.5, 110.6 ]。