Photochemical reactions of metal carbonyls [M(CO)₆ (M=Cr, Mo, W), Re(CO)₅Br, Mn(CO)₃Cp] with salicylaldehyde ethanesulfonylhydrazone (Hsalesh)

Abstract

The new complexes, M(CO)₅(Hsalesh) (M = Cr (1), Mo (2), W (3)), Re(CO)₄Br(Hsalesh) (4) and Mn(CO)₃(Hsalesh) (5) have been synthesized by the photochemical reaction of metal carbonyls M(CO)₆ (M = Cr, Mo, W), Re(CO)₅Br, and Mn(CO)₃Cp with salicylaldehyde ethanesulfonyl hydrazone (Hsalesh). The complexes have been characterized by elemental analysis, EI mass spectrometry, FT-IR and ¹H NMR spectroscopy. The spectroscopic studies show that Hsalesh behaves as a monodentate ligand coordinating via imine N donor atom in M(CO)₅(Hsalesh) (M = Cr, Mo, W) and Re(CO)₄Br(Hsalesh) and as a tridentate ligand in Mn(CO)₃(salesh).

Keywords:

• Hydrazone
• Salicylaldehyde ethanesulfonylhydrazone
• Metal carbonyls

Acknowledgements

This research was supported by Gazi University Research Found under Project No. 05-98/24. We thank BP (Turkey) for the provision of photochemical apparatus and Research Foundation of Ege. We thank TUBİTAK for allocation of time at the NMR, mass spectra and elemental analyses.