Structure of dialkyltin diaryloxides and their reactivity toward carbon dioxide and isocyanate
作者:Hiroyuki Yasuda、Jun-Chul Choi、Sang-Chul Lee、Toshiyasu Sakakura
DOI:10.1016/s0022-328x(02)01719-9
日期:2002.10
dilution. The 119Sn-NMR spectra, especially for Me2Sn(OAr)2, exhibited two distinctly resolved signals assignable to the presence of isomeric five-coordinate environments. The reactivity of R2Sn(OAr)2 was much lower than that of R2Sn(OMe)2. Thus, R2Sn(OAr)2 did not react with carbon dioxide even at high pressure and excess amount of carbon disulfide. On the other hand, the reaction with p-methoxyphenyl isocyanate
研究了二烷基锡二芳基氧化物R 2 Sn(OAr)2(R = Me,Bu; Ar = Ph,p -FC 6 H 4,p - t -Bu-C 6 H 4)的合成,结构和反应性。关于芳基氧化物和甲醇盐之间的区别。固态的Me 2 Sn(OAr)2形成二聚体。通过单晶X射线分析确认了芳氧基桥连结构。另一方面,溶液中的R 2 Sn(OAr)2稀释后容易解离。的119 Sn-NMR的光谱,特别是对我2的Sn(OAR)图2显示了两个明显分辨的信号,它们可分配给同分异构的五坐标环境。R 2 Sn(OAr)2的反应性远低于R 2 Sn(OMe)2的反应性。因此,即使在高压和过量的二硫化碳下,R 2 Sn(OAr)2也不与二氧化碳反应。另一方面,与对甲氧基苯基异氰酸酯的反应导致相应的氨基甲酸酯氨基甲酸酯,表明异氰酸酯插入R 2 Sn(OAr)2的锡-氧键中。