solution of (QtBu)2SnMe2, which exists as an equilibrium mixture of six- and five-coordinate tin species. Single-crystal X-ray structure determinations of several representative complexes are presented. Whereas the dialkyltin(IV) complexes are always trans-octahedral, a diphenyltin(IV) derivative exists in the solid state that has the two phenyl groups in a cis arrangement. DMol3 and CASTEP DFT studies of
4-酰基-5-
吡唑啉酮 Q2SnR2 的二
有机锡 (IV) 衍
生物 [HQ = 3-甲基-1-苯基-4-R-5-
吡唑啉酮:HQnPe,R = 新戊基羰基;HQiPr,R = 异丙基羰基;HQtBu,R = 叔丁基羰基;HQCy,R = 环己基羰基;HQCp,R = 环戊基羰基;HQEtCp, R = (乙基环戊基)羰基] 已经合成并在光谱(红外、远红外、1H、13C 和 119Sn NMR)和结构(X 射线)上表征。HQtBu 酰基片段中的空间体积会导致 (QtBu)2SnMe2 溶液中的部分解离,该溶液以六配位和五配位
锡物质的平衡混合物形式存在。介绍了几种代表性配合物的单晶 X 射线结构测定。而二烷基
锡 (IV) 配合物总是反八面体,二苯基
锡 (IV) 衍
生物以固态存在,具有顺式排列的两个苯基。
DMol3 和 CAS
TEP DFT 研究这种前所未有的顺式和相应的反式构型,表明前者稍微更稳定,与衍射研究一致。固态