Physicochemical Properties of Molybdenum Compounds
This chapter is concerned with those properties of molybdenum compounds that can be used to provide information about the steric and electronic environment of the metal ion. Most attention has been concentrated on molybdenum compounds in aqueous solution although a recent report of the localisation of rat-liver sulphite oxidase in the intermembrane space of mitochondria (section 14.6) suggests that more emphasis should be placed on studies of nonaqueous systems. Of the molybdenum ions that are likely to be stable in a biological environment, Mo(III), Mo(IV) and Mo(V) have three, two and one d electron(s), respectively. They should therefore give rise to d-d electronic spectra, e.p.r. spectra and bulk magnetic susceptibility. These can in principle provide information about the nature of the ligands co-ordinated to the metal ion, its oxidation state and the stereochemistry of its ligand environment.
KeywordsXanthine Oxidase Electron Paramagnetic Resonance Spectroscopy Mercaptoacetic Acid Molybdenum Compound Sulphur Ligand
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