One pot synthesis of group 6 homo-bimetallic carbonyl complexes incorporating a Schiff base and bidentate phosphine ligands
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Date
2016-09-04
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Federal University Wukari, Nigeria
Abstract
A simple route to the synthesis of two homo-bimetallic molybdenum carbonyl complexes [Mo2(CO)6(HL)2(dppm] (1) and [Mo2(CO)4(HL)2(dppb)] (2) (HL = (E)-2-((2-
hydroxybenzylidene)amino)phenol; dppm = bis(diphenylphosphino)methane, dppb = 1,4-
bis(diphenylphosphino)butane) have been developed. The two compounds were obtained pure by thermal
decarbonylation of Mo(CO)6 using a Schiff base ligand previously prepared by condensation reaction of
salicylaldehyde and 2-aminophenol, in the presence of either dppm or dppb. Compounds 1 and 2 were
characterized using elemental analysis, IR and NMR (1H, 13C and 31P) spectroscopy. Elemental analysis and
spectroscopic data revealed bimetallic complexes with three and two carbonyl remaining in the structure of
complex 1 and 2 respectively with diphosphines acting as bridge between the two metals.
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Keywords
Molybdenum hexacarbonyl, bimetallic complexes, diphosphines, decarbonylation, biological activity