Copper and Silver Complexes of N‐Heterocyclic Carbene‐Parent Phosphinidene Adducts

Abstract The reactions of the N‐heterocyclic carbene‐parent phosphinidene adducts (IMes)PH ( 1 a ) and (IDipp)PH b with one equivalent copper(I) or silver(I) chloride afforded monometallic complexes [{(IMes)PH}MCl] 2 , M=Cu; M=Ag) [{(IDipp)PH}MCl] 3 M=Ag). Single‐crystal X‐ray diffraction analyis provided evidence for higher tendency ligand to form polynuclear structures bridging NHC‐phosphinidene ligands in solid state, while larger mononuclear complexes. two equivalents CuCl formation bimetallic [{(NHC)PH}(CuCl) ] 4 NHC=IMes; NHC=IDipp), but their isolation pure was not possible because considerable instability solution.