A novel dinuclear tetracarbonyl complex containing a bridging alkyldiazenido ligand [WCl(CO)2(PMe2Ph)2(NNCMe2CMe2NN)WCl(CO)2(PMe2Ph)2] formed via a cationic carbonyldiazoalkane complex [WCl(CO)(NNCMe2)(PMe2Ph)3][ZnCl3(thf)]

Abstract

Treatment of a diazoalkane complex mer-[WCl₂(NNCMe₂)(PMe₂Ph)₃] with CO in the presence of ZnCl₂(dioxane) affords a cationic carbonyldiazoalkane complex [WCl(CO)(NNCMe₂)(PMe₂Ph)₃][ZnCl₃(thf)](thf = tetrahydrofuran), in which the carbon–carbon coupling of the diazoalkane ligand occurs by reduction with Mg under CO to give a dinuclear tetracarbonyldiazenido complex [WCl(CO)₂(PMe₂Ph)₂(NNCMe₂CMe₂NN)WCl(CO)₂(PMe₂Ph)₂].