摘要:
The mixed ligand complexes of the type, [Ru(III)(DPA)(L)Cl] (where DPA=2,6-dipicolinic acid, and L=ethylenediamine, 2,2'-bipyridine or 1,10-phenanthroline) have been synthesised and characterised by spectral, magnetic and cyclic voltammetric studies. The complexes have been used as catalysts for the oxidation of hydrocarbons using iodosylbenzene and tert-butyl hydroperoxide as the oxidants. The formation of intermediate has been investigated in case of the oxidation reaction involving various oxidants and [Ru(III)(DPA)(2,2'-bipy) Cl] as a catalyst. It is observed that the same active intermediate, [Ru(V)(DPA)(2,2'-bipy)(O)], is formed for all of the oxidants. This intermediate catalytically transfers oxygen to the olefin and causes its oxidation. Termination of the catalytic activity is due to the formation of the mu-oxo dimer of the complex, which has been isolated and characterised by elemental analysis, spectral and cyclic voltammetric studies.