Functional model of oxomolybdoenzymes: Synthesis and characterization of amolybdenum complex with sulphur and pterin ligands exhibiting saturation kinetics with pyridine N-oxide

Authors
Ali, MDA Roy, PS
Citation
Mda. Ali et Ps. Roy, Functional model of oxomolybdoenzymes: Synthesis and characterization of amolybdenum complex with sulphur and pterin ligands exhibiting saturation kinetics with pyridine N-oxide, P I A S-CH, 113(2), 2001, pp. 77-87
Citations number
50
Categorie Soggetti
Chemistry
Journal title
PROCEEDINGS OF THE INDIAN ACADEMY OF SCIENCES-CHEMICAL SCIENCES
ISSN journal
02534134 → ACNP
Volume
113
Issue
2
Year of publication
2001
Pages
77 - 87
Database
ISI
SICI code
0253-4134(200104)113:2<77:FMOOSA>2.0.ZU;2-C
Abstract
Redox reaction between 6-acetonylisoxanthopterin (H(2)pte) and [(MoO2)-O-VI (ssp)] [ssp = anion of 2-(salicylideneamino) benzenethiol] in CH3OH-C2H5OH medium produces a new mixed ligand compound [Mo-IV (ssp) (Hpte) (OCH3)] (1 ). It has been characterized by elemental analysis, ESMS data, UV-Vis, IR, H-1 NMR (1D and 2D) spectroscopy and cyclic voltammetry. Kinetics of format ion of this compound as well as that of its reaction with pyridine N-oxide have been followed spectrophotometrically. Both the reactions follow substr ate saturation kinetics and involve metal-centred oxygen atom transfer proc ess. Large negative values of entropy of activation indicate the operation of associative mechanism.