Functional model of oxomolybdoenzymes: Synthesis and characterization of a molybdenum complex with sulphur and pterin ligands exhibiting saturation kinetics with pyridine N-oxide |
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| Authors: | MD Afsar Ali and Parag S Roy |
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| Institution: | (1) Department of Chemistry, University of North Bengal, 734 430 Dist. Darjeeling, India |
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| Abstract: | Redox reaction between 6-acetonylisoxanthopterin (H2pte) and MoVIO2 (ssp)] ssp = anion of 2-(salicylideneamino) benzenethiol] in CH3OH-C2H5OH medium produces a new mixed ligand compound MoIV (ssp) (Hpte) (OCH3)] (1). It has been characterized by elemental analysis, ESMS data, UV-Vis, IR,1HNMR (1D and 2D) spectroscopy and cyclic voltammetry. Kinetics of formation of this compound as well as that of its reaction
with pyridine N-oxide have been followed spectrophotometrically. Both the reactions follow substrate saturation kinetics and
involve metal-centred oxygen atom transfer process. Large negative values of entropy of activation indicate the operation
of associative mechanism. |
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| Keywords: | Mixed ligand molybdenum (IV) compound with a 6-substituted pterin model system of oxomolybdoenzymes oxygen atom transfer reaction |
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