Reaction of N-trimethylsilyl derivatives of amides and lactams with chloro(chloromethyl)dimethylstannane: Crystal and molecular structure of 1-(chlorodimethylstannylmethyl)-2-piperidone
作者:Sergey Yu. Bylikin、Aleksandr G. Shipov、Vadim V. Negrebetsky、Yuri I. Baukov、Yuri E. Ovchinnikov、Sergei A. Pogozhikh、Sergei V. Pestunovich、Lyudmila I. Belousova、Elena F. Belogolova、Valery F. Sidorkin、Mikhail G. Voronkov、Vadim A. Pestunovich、Inna Kalikhman、Daniel Kost
DOI:10.1016/j.jorganchem.2005.05.052
日期:2006.2
1-(chlorodimethylstannylmethyl)-2-piperidone (3b) confirmed (3 + 2)-coordination state of the tin atom and axial positions of oxygen and halogen atoms. The experimental and quantum-chemically calculated structural parameters are discussed in comparison with those of related trigonal bipyramidal (TBP) silicon, germanium and tin derivatives. Calculation at the MP2/LanL2DZ/D95 level reveals that the stability of
通过NMR和IR技术建立了氯(氯甲基)二甲基锡烷与N-三甲基甲硅烷基酰胺和-内酰胺之间反应的一般方案。反应通过金属转移进行,然后将N-锡烷基化的中间体(1)转变为(N-Sn)配位的O-锡烷基甲基(2)和(O-Sn)配位的N-锡烷基甲基(3)衍生物。在2-哌啶酮和2-六氢a庚酮的情况下,这些产物被分离为单独的化合物(2b,c和3b,c)。1-(氯二甲基锡烷基甲基)-2-哌啶酮(3b)的X射线衍射研究证实了锡原子的(3 + 2)配位状态以及氧和卤素原子的轴向位置。与相关的三角双锥体(TBP)硅,锗和锡衍生物进行了比较,讨论了实验和量子化学计算的结构参数。在MP2 / LanL2DZ / D95级别的计算显示,(O-M)螯合物的稳定性按以下顺序增加:(O-Si)<(O-Ge)<(O-Sn)。