the imine nitrogen atom is Me, Et, or CH2Ph the adduct exists as a mixture of two isomers in acetonitrile, and when R = But or the other aryl groups only one species exists. The configuration of these isomers is proposed on the basis of the 1H chemical shifts of the ligand protons and their spin–spin coupling constants with the tin nuclei. In addition, the molecular structure of the adduct with R = Ph
六坐标正丁基三
氯锡(IV)与一些N'-取代的
吡啶-
2-甲二胺SnBu n Cl 3 ·C 5 H 4 N(CH NR)(R = Me,Et,CH 2 Ph,Bu t,Ph,C 6 H 4 Me- p或C 6 H 4 OMe- p)已被分离出来。当
亚胺氮原子上的取代基(R)为Me,Et或CH 2 Ph时,加合物以两种异构体的混合物形式存在于
乙腈中,并且当R = Bu t时或其他芳基仅存在一种。这些
配体的构型是根据
配体质子的1 H
化学位移及其与
锡核的自旋-自旋偶合常数提出的。另外,通过单晶X射线衍射已经确定了R = Ph的加合物的分子结构。三斜晶体空间群P的晶胞尺寸为a = 8.655(8),b = 13.984(10),c = 8.662(5)Å,α= 102.16(7),β= 104.15(7),γ = 102.97( 7)°,Z =2。对2 764个独立反射的最小二乘法精炼得到R系数0.027。