Organotin(IV) compounds 2-(Me2NCHR)C6H4(SnR′R″Br) with a fixed s-cis arrangement of the chiral carbon and tin centers. Crystal structure of 2-(Me2NCHBut)C6H4SnMePhBr
作者:Johann T.B.H. Jastrzebski、Jaap Boersma、Gerard van Koten
DOI:10.1016/0022-328x(91)80037-k
日期:1991.8
A series of novel pentacoordinate triorganotin bromides SnR′R″Br[C6H4CH(R)NMe2-2] have been synthesized and characterized in which R is H, Me, Et, i-Pr or t-Bu. The crystal structure of one of these compounds (R = t-Bu, R′ = Me and R″ = Ph) has been determined. The tin center has a distored trigonal-bipyramidal coordination geometry. The organic ligands occupy the equatorial sites, while the more electronegative
合成并表征了一系列新颖的五配位三有机锡溴化物SnR'R''Br [C 6 H 4 CH(R)NMe 2 -2],其中R为H,Me,Et,i-Pr或t-Bu。已经确定了这些化合物之一的晶体结构(R = t-Bu,R'= Me,R''= Ph)。锡中心具有变形的三角-双锥体配位几何形状。有机配体占据赤道位点,而负电性更高的Br和N配体位于轴向位置。根据空间群对称性的要求,晶胞包含8个非对映异构体对(R)C(S)Sn和(S)C(R)锡。以形成空间上最有利的非对映异构体的方式,将在手性苄基碳原子处的给定构型与在手性锡原子处的构型结合。