Reactions of bis(trifluoromethyl)diazomethane with transition-metal complexes

Abstract

At room temperature hydridopentacarbonylmanganese reacts with (CF₃)₂CN₂ to form (CF₃)₂C(H)Mn(CO)₅. In contrast, the platinum hydride trans-(Et₃P)₂Pt(H)Cl only reacts at elevated temperatures, when trans- and cis-(Et₃P)₂Pt[CH(CF₃)₂]Cl are formed, the latter predominating. Treatment of the iron complex [(π-C₅H₅)Fe(CO)₂]₂ with (CF₃)₂CN₂ in tetrahydrofuran yields (π-C₅H₅)Fe(CO)₂CH(CF₃)₂. Octacarbonyldicobalt reacts at room temperature with the diazo-compound giving the air- and light-sensitive red crystalline complex [(CF₃)₂C]Co₂(CO)₇. Chlorocarbonylbis(diphenylmethylphosphine)iridium with (CF₃)₂CN₂ affords the stable complex (Ph₂PMe)₂Ir-[C(CF₃)₂](Cl)CO, the possible structure of which is discussed.