Synthesis and Characterization of Metal Carbonyls [M(CO)6(M =Cr, Mo, W), Re(CO)5Br, Mn(CO)3Cp] with 2-Hydroxy-1-napthaldehyde Ethanesulfonylhydrazone (nafesh)

Five new complexes, M(CO) (nafesh) (M = Cr (1), Mo (2), W (3)), Re(CO) Br(nafesh) (4) and Mn(CO) (nafesh) (5) have been synthesized by the photochemical reaction of metal carbonyls M(CO) (M = Cr, Mo, W), Re(CO) Br, and Mn(CO) Cp with 2-hydroxy-1-napthaldehyde ethanesulfonylhydrazone (nafesh). The complexes have been characterized by elemental analysis, EI mass spectrometry, FT-IR, H NMR spectroscopy. The spectroscopic studies show that nafesh behaves as a monodentate ligand coordinating via imine N donor atom in M(CO) (nafesh) (M = Cr, Mo, W) and Re(CO) Br(nafesh) and as tridentate ligand in Mn(CO) (nafesh).