Iron(ii), manganese(ii) and cobalt(ii) complexes containing tetradentate biphenyl-bridged ligands and their application in alkane oxidation catalysis

Britovsek, G.J.P., England, Jason and White, A.J.P. (2006) Iron(ii), manganese(ii) and cobalt(ii) complexes containing tetradentate biphenyl-bridged ligands and their application in alkane oxidation catalysis. Dalton Transactions, 6 (11). pp. 1399-1408. ISSN 1477-9226

Full content URL: https://doi.org/10.1039/B513886H

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Item Type:Article
Item Status:Live Archive

Abstract

A series of manganese(II), iron(II) and cobalt(II) bis(triflate) complexes containing linear tetradentate bis(imine) and bis(amine) ligands with a biphenyl bridge have been synthesized. The twist in the ligand backbone due to the biphenyl unit leads in the case of the bis(imine) ligands (1 and 2) containing sp2 hybridised N donors, to a distorted cis-α coordination geometry, whereas in the case of the biphenyl- and biphenylether-bridged bis(amine) ligands (7–9 and 12), a trans coordination geometry is observed. The catalytic properties of the complexes for the oxidation of cyclohexane, using H2O2 as the oxidant, have been evaluated. Only the iron complexes show any catalytic activity under the conditions used, but the low conversions and selectivies observed indicate that these catalysts lead predominantly to free radical auto-oxidation.

Keywords:Catalyst activity, Cobalt, Complexation, Manganese, Oxidation, Synthesis (chemical), Alkane oxidation catalysis, Cyclohexane, Free-radical auto-oxidation, Iron
Subjects:F Physical Sciences > F120 Inorganic Chemistry
F Physical Sciences > F110 Applied Chemistry
Divisions:College of Science > School of Chemistry
ID Code:51936
Deposited On:19 Oct 2022 11:10

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