Nucleophilic Displacements in Alkylphosphonates: P–O Versus P–C Bond Cleavage. A Combined DFT and Experimental Study
作者:Nissan Ashkenazi、Ravit Chen
DOI:10.1080/10426507.2012.743130
日期:2013.1.1
Abstract Potential energy surfaces for the nucleophilic displacements at phosphorus in dimethyl methyl, chloromethyl, dichloromethyl, and trichloromethyl phosphonates have been computed by DFT methods. The results reveal that sequential introduction of chlorine substituents at the methyl group in methyl phosphonates increases the stability of transition states and intermediates, which facilitates P–C bond
摘要 用 DFT 方法计算了二甲基甲基、氯甲基、二氯甲基和三氯甲基膦酸酯中磷亲核置换的势能面。结果表明,在甲基膦酸酯的甲基上连续引入氯取代基增加了过渡态和中间体的稳定性,从而促进了 P-C 键的断裂。虽然未取代的甲基膦酸二甲酯可能会发生排他性的 P-O 键断裂,但三氯化类似物仅通过 P-C 键解离反应形成二氯卡宾,二氯卡宾被各种烯烃捕获,形成相应的二氯环丙烷。图形概要