Dioxomolybdenum (VI) Complexes with o-Phenylenediamine and 4-Methyl-o- Phenylenediamine Ligands: Synthesis and Catalytic Activity in Oxidation of Alcohols

Two new dioxomolybdenum (vi) complexes [moo2(acac)ll'] (i) and [moo2l2l2](ii)[l=oc(ch3)chcoch3, l=nh2c6h4nh2, l'= nh2c6h3ch3nh2] with diamine o-phenylenediamine (opda) and 4- methyl-o-phenylenediamine (4-me-opda) ligands have been synthesized and characterized. compounds (i) (61% yield) and (ii) (62% yield) were obtained from the reactions of moo2(acac)2 [acac=acetyl acetonato] with 1 equiv. of opda and 4-me-opda. 1h, 13c nmr, ir spectral data indicated that the ligands acted as unidentate and structures of both compounds were six-coordinated. the dioxomolybdenum (vi) complexes (i) and (ii) are efficient catalysts for oxidation of alcohols with h2o2 as an oxidant.