The preparation and properties of η3-cycloalkenylcarbonylvanadium complexes of the following types are reported: (η3-enyl)V(CO)5, (η3-enyl)V(CO)4PR3 (R = Et, Ph) and (η3-enyl)V(CO)3L2 (L2 = dppe (1,2-bis(diphenylphosphino)ethane), dppm (bis(diphenylphosphino)methane), arphos (1-diphenylphosphino-2-diphenylarsinoethane); L = PPh3).
Substituted vanadium carbonylcompounds with η2-bonded acyl ligands (η2-RCO)V(CO)3 ( = ditertiary phosphines or arsines: dppe, dppp, dppm, diars, arphos, dpase) have been prepared by photochemical reaction of [V(CO)4] with various substituted benzoyl chlorides and cyclopropanylcarbonyl chloride.