Ruthenium(II) Complexes of O,N-donor Schiff base ligands and their use as catalytic organic oxidants
作者:Ahmed M. El-Hendawy、Abdulla H. Alkubaisi、Abd El-Ghany El-Kourashy、Mai M. Shanab
DOI:10.1016/s0277-5387(00)83051-x
日期:1993.10
A number of new ruthenium(II) complexes, [Ru(PPh3)2L2] (L = monoanions of Schiff bases formed from 2,3-dihydroxybenzaldehyde, 3,5-dibromosalicylaldehyde and salicylaldehyde with aniline or its p-substituents), have been prepared. They were characterized by spectroscopic techniques and investigated by cyclic voltammetry. The effective catalytic oxidation of alcohols by these complexes in the presence of N-methylmorpholine-N-oxide or molecular oxygen gas as co-oxidants is reported.
Schiff base complexes of ruthenium(III), molybdenum(VI) and uranium(VI), and use of the former as catalytic organic oxidants
作者:Ahmed M. El-Hendawy、Abd El-Ghany El-Kourashy、Mai M. Shanab
DOI:10.1016/s0277-5387(00)83299-4
日期:1992.1
The new complexes [RuIIIX2(AsPh3)2(HL)] (X = Cl, Br; HL = monoanions of Schiff bases formed from condensation of 2,3-dihydroxybenzaldehyde and aniline or its omicron- and p-substituted derivatives), cis-[MoO2(HL)2] and trans-[UO2(HL)2.nH2O] (n = 0 or 2) have been isolated. They were characterized by spectroscopic techniques and investigated by cyclic voltammetry. The ruthenium(III) complexes were found to be effective catalysts for oxidation of primary alcohols to aldehydes, secondary alcohols to ketones and 3,5-di(tert-butyl)catechol to the corresponding omicron-benzoquinone in the presence of N-methyl-morpholine-N-oxide as co-oxidant.