二茂二氯钛和二(取代茂)二氯钛的低频振动光谱分析  

LOW FREQUENCY VIBRATIONAL SPECTRA ANALYSIS OF DICYCLOPENTADIENYL TITANIUM DICHLORIDE AND BISSUBSTITUTED CYCLOPENTADIENYL TITANIUM DICHLORIDES

作　　者：聂崇实[1] 毛晨[1] 张才华[1] 钱延龙[1] 陈寿山[2] 

机构地区：[1]中国科学院上海有机化学研究所,上海200032 [2]南开大学元素有机化学研究所

出　　处：《光谱学与光谱分析》1990年第2期5-11,共7页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金

摘　　要：本工作摒弃前人用正四面体假设结构,而采用近年发表的结构参数及C_(2v)对称性对Cp_2TiCl_2(1)(Cp为环戊二烯基)的络合骨架振动进行了简正坐标计算。对骨架振动频率作了合理归属。侧得了20个(R-C_5H_4)_2TiCl_2化合物的红外光谱。这些化合物在500-50cm^(-1)低频区与母体(1)的光谱相似。它们的特征骨架伸缩、变角和Cp环跷动模式可易于指认。低频光谱表明这些化合物仍保持C_(2v)结构。Normal coordinate analysis of the coorninate framework of Cp_2TiCl_2 (Cpcyclopentadienyl) has been carried out using currently reported molecular parameters with C_(2V) symmetry, instead of tetrahedral structure in ref.[3]. The skeletal vibrational modes are reasonably assigned. The IR spectra of twenty (R-C_5H_4)_2TiCl_2 were measured. The 500—50cm^(-1) low frequency spectra of these compounds show analoqous with Cp_2TiCl_2. The characteristic skeletal stretching, bending and Cp tilt modes could be assigned without difficulty. It implies that the C_(2V) structure is retained consistently in these compounds.

关 键 词：二茂二氯钛 有机化合物 振动 光谱 

分 类 号：O627.43[理学—有机化学]