In stark contrast to poorly electrophilic classical σ-donating spectator ligands, we show that geometrically constrained low-coordinate, cationic GeII and SnII ligands remain highly electrophilic in the coordination sphere of Ni0, despite being σ-donors; binding of nucleophiles and fluoride abstraction at the donor atom is demonstrated, alongside the capacity to catalyse the hydrosilylation of alkenes
与亲电性差的经典σ供体旁观
配体形成鲜明对比,我们发现几何约束的低配位阳离子Ge II和Sn II
配体在Ni 0配位层中保持高度亲电性,尽管它们是σ供体。证明了亲核试剂的结合和供体原子上
氟化物的提取,以及催化烯烃和
炔烃氢化
硅烷化的能力。