作者:Carine Maaliki、Christine Lepetit、Carine Duhayon、Yves Canac、Remi Chauvin
DOI:10.1002/chem.201202279
日期:2012.12.7
Carbene→chalcogenophosphenium adducts, which correspond to an intermolecular stabilization mode of the so far elusive, free oxo‐ and thiooxophosphenium species [R2P+=X] (X=O, S) by imidazolylidene (NHC) and diaminocyclopropenylidene (BAC) donors, have been isolated and fully characterized. The dative character of the R2C:→P+(X)Ph2 bond was confirmed experimentally by nucleophilic displacement of the
碳→硫属o加合物,对应于目前为止由咪唑基亚烷基(NHC)和二氨基环丙烯基(BAC)供体提供的难以捉摸的游离氧代和硫代氧代磷鎓物种[R 2 P + = X](X = O,S)的分子间稳定模式,已被隔离并具有完整特征。R 2 C:→P +(X)Ph 2键的位置特征是通过卡宾供体与氯离子的亲核取代以及NHC:→P +(O Ph 2与独立制备的BAC配体的加合物,从而得到BAC:→P +(O)Ph 2加合物。通过DFT计算得出,卡宾→硫属o体系对杂化解离模式的偏好优于均相解离模式。