Synthesis, crystal structure, and NMR investigation of methyl α,α-dimethyl acetate-substituted π-allylpalladium complexes
作者:Ido Schwarz、Jörg Rust、Christian W Lehmann、Manfred Braun
DOI:10.1016/s0022-328x(00)00276-x
日期:2000.6
and the cationic allyl complex 8 were prepared and characterized by NMR spectroscopy as well as crystal structure analyses. The carbonyl group of the carboxylic ester moiety does not form a chelate with the metal atom. The activation enthalpy of a π–σ–π conversion could be determined to be 14.6 kcal mol−1 based on the dynamic NMR spectroscopy of the allylpalladium complex 8.
制备二聚的三氟乙酸酯桥连的π-烯丙基铝络合物6和阳离子烯丙基络合物8,并通过NMR光谱法和晶体结构分析进行表征。羧酸酯部分的羰基不与金属原子形成螯合物。根据烯丙基钯络合物8的动态NMR光谱,可以确定π–σ–π转换的活化焓为14.6 kcal mol -1。