Bonding and ligand exchange in pentamethyldialane. An IR, NMR and ab initio study
摘要:
红外研究表明,在三甲基丙烷和二甲基丙烷的混合物中,易变气相平衡的主要成分是异极五甲基二丙烷 Me2Al(µH)(µMe)AlMe2。对同位素变体的光谱进行偏正坐标分析后发现,这种优势是由于 Al-HAl 桥键的显著增强所致。模型系统的 ab initio 计算支持了实验观察结果。红外和变温 1H NMR 研究对甲苯中的烷混合物溶液得出了类似的结论,并支持涉及单桥物种的配体交换机制。
作者:Andrew S. Grady、Shakher G. Puntambekar、Douglas K. Russell
DOI:10.1016/0584-8539(91)80177-k
日期:1991.1
The infrared and Raman spectra of dimethyl aluminium hydride and its partially deuterated isotopomers are reported and assigned. On the basis of variable temperature studies, coupled with isotope shifts and normal coordinate analysis, it is shown that the vapor phase infrared spectrum at room temperature may be interpreted as predominantly that of the dimer, with smaller amounts of trimer.