Collect. Czech. Chem. Commun. 1980, 45, 880-887

Influence of nitrogen ligands on synergic effect of metal catalysts in oxidation of alkylaromatic compounds

Milan Hronec, Štefan Holotík and Ján Ilavský

Department of Organic Technology, Slovak Institute of Technology, 880 37 Bratislava


Synergic effect of metal mixtures Co-Mn, Co-Ce and Co-U in oxidation of 1,2,4- and 1,3,5-trimethylbenzenes dissolved in acetic acid has been studied in dependence of the presence of nitrogen ligands 2,2',2''-nitrilotrisethanol, 1,6-hexanediamine and pyridine. The complex CoBr2Py2 and its equimolar mixture with the complex MnBr2Py2 are highly active in oxidation of alkyl-aromatic derivatives containing other alkyl than methyl. Their activity has been tested experimentally in oxidations of ethylbenzene, 1,3- and 1,2-dimethylbenzenes, 1-ethyl-4-methylbenzene, (1-methylethyl)benzene, propylbenzene, 1-methyl-4-(1-methylethyl)benzene, dodecylbenzene, 1,3-diethylbenzene and 4-octyl-1,1'-biphenyl.