Crystal Structure and Chemical Properties of Tris(2,6-dimethoxyphenyl)phosphine Selenide
作者:Masanori Wada、Shuichi Hayase、Masanobu Fujiwara、Tetsuji Kawaguchi、Toshio Iwasaki、Akira Uo、Tatsuo Erabi
DOI:10.1246/bcsj.69.655
日期:1996.3
compound, Φ3PSe [Φ = 2,6-(MeO)2C6H3], showed that the P=Se bond distance [2.136(2) A] was the longest among those of the reported triarylphosphine selenides, that the P–C bond distances [av. 1.839 A] were longer than those of triphenylphosphine selenide, and that all the P···O interatomic distances [2.794—3.189 A] were shorter than the sum of the van der Waals radii, implying a direct electron-donative
标题化合物 Φ3PSe [Φ = 2,6-(MeO)2C6H3] 的 X 射线晶体结构表明,P=Se 键距 [2.136(2) A] 是已报道的三芳基膦硒化物中最长的,P-C 键距离 [av. 1.839 A] 比硒化三苯基膦长,并且所有 P…O 原子间距离 [2.794-3.189 A] 都小于范德华半径的总和,这意味着来自甲氧基的直接给电子相互作用氧原子到磷原子。一些化学证据还表明,P=Se 键比硒化三苯基膦弱。烷基卤化物RX与Φ3PSe反应得到烷基硒鏻盐[Φ3P-SeR]X和烷基鏻盐[Φ3P-R]X的混合物,而它们与PhΦ2PSe反应几乎选择性地得到[PhΦ2P-SeR]X。