Ring expansion of coordinated N,P-heterocyclic carbenes: methylene and imidogen insertion
Abstract
Two novel classes of 6-membered nitrogen phosphorus heterocyclic carbene (NPHC) complexes arise from the insertion of methylene or imidogen units into one C–C bond of azaphospholylidene complexes via reactions with H2C
PPh3 or LiN
AsPh3, respectively.

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