Synthesis, crystal structure and ligand based catalytic activity of octahedral salen Schiff base Co(III) compounds

Two octahedral cobalt(III) compounds ([(CoLCN)-C-1(H2O)]-DMF (1) and [(CoLL3)-L-2] - H2O (2)) were synthesized by using two Schiff bases, H2L1 and H2L2 and are well-characterized by different spectral methods. Catalytic ability of the compounds were studied by the catecholase oxidation reaction. Among the two compounds, compound 2 with bare aldehydic type coligand catalysed the 3,5-di-tertiarybutylcatechol (3,5-DTBC) into corresponding quinone. Here, the nature of the ligand exhibited a significant role in the oxidation of the substrate. A catalytic loop is proposed to explain the mechanistic aspect of the reaction and different kinetic parameters (V-max (3.31 x 10(-3) M) and K-M (3.43 x 10(-3) M mM(-1)) were also determined. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

The two cobalt compounds were synthesized using different ligands and their catalytic abilities were studied through oxidation reaction. Compound 2 showed better catalytic activity, with the ligand nature playing a crucial role in the oxidation of the substrate, as verified by the kinetic parameters.