Germylene with Chelating Phosphinohydrazide Ligands Ge(NPh-NPh-PPh_2)_2:Synthesis and Structure

摘要

Lappert-type germylenes Ge(NR_2)_2 (R=Me_3Si,alkyl,aryl) are stable compounds widely used as mono-dentate ligands in coordination and organometallic chemistry [1].At the same time,the carbenoids ER_2 (E=Ge,Sn,Pb),whose substituent R contains additional chelating functions,are few in number but attract considerable interest [2].In particular,they can serve as universal ligands of a new type capable of coordinating metals of different types (p,d,f) due to a variable ratio between the sigma-donor and pi-acceptor activities of the E,D,and M centers.