Stereochemistry of hypervalent tin(IV) compounds. NMR and crystallographic studies of organoyltin(IV) complexes with 1,1-dithiolate ligands
作者:Dainis Dakternieks、Hongjiang Zhu、Dante Masi、Carlo Mealli
DOI:10.1016/s0020-1693(00)85595-4
日期:1993.9
coordination spheres in dichloromethane solution of a series of organoyltin(IV) 1,1-dithiolate compounds RSnXn(SS)3−n (where R Ph, Me; X Cl, Br; n=0, 1,2), for SS S2CNEt2, S2COEt, S2P(OEt)2. Intermolecular halide and 1,1-dithiolate exchange are slow on the NMR timescale however the tin-119 chemical shifts are temperature dependent due to the intramolecular equilibrium between monodentate and bidentate
摘要锡119 NMR数据已用于检测一系列有机基锡(IV)1,1-二硫代硫酸盐化合物RSnXn(SS)3-n(其中RPh,Me; X对于SSS2CNEt2,S2COEt,S2P(OEt)2,Cl,Br; n = 0,1,2)。分子间卤化物和1,1-二硫代酸酯的交换在NMR时标上很慢,但是由于单齿和双齿配位的1,1-二硫代配体之间的分子内平衡,锡119化学位移取决于温度。RSn(SS)3系列的锡119化学位移的温度依赖性大小表明1,1-二硫代盐配体供体强度的顺序为Et2dtc> Etxan> Et2dtp。混合配体配合物PhSn(SS)(SS)2可以通过PhSn(SS)3和PhSn(SS)3的再分布反应或通过添加1,1-二硫代盐制得PhSnCln,(SS)3-n,(n = 1,2)的溶液。已确定PhSn(S2CNEt2)3的晶体结构。PhSn(S2CNEt2)3中锡的几何