Synthesis and characterization of manganese and rhenium tricarbonyl complexes with ( O,O,O)-donor ligands

Abstract

Complexes of the type [(C 5H 5)Co{P(O)R 2} 3] −, R = OCH 3, OC 2H 5, react as tridentate oxygen ligands L − with [MBr(CO) 5], M = Mn, Re, in hexane or tetrahydrofuran to give the tricarbonyl derivatives [LM(CO) 3]. The slightly volatile yellow crystalline compounds have been characterized by elemental analysis, 1H NMR, IR and mass spectra. The low CO stretching frequencies indicate that the ligands L − are good π-donor ligands.