Transition metal derivatives of aryl diazonium ions. Part II. Arylazo derivatives of substituted iron carbonyls

Abstract

Diazonium salts react with phosphine-substituted iron carbonyls, L₂Fe(CO)₃, to give stable orange arylazo derivatives of formula {ArN₂Fe(CO)₂L₂}⁺BF₄^–. I.r., electronic, n.m.r. (¹H, ¹⁹F, and ³¹P), and Mössbauer spectroscopic data have been recorded for selected complexes. The π-acceptor character of the ArN₂ ligand is discussed in the context of preliminary results of a structural determination.