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Spin Crossover and Redox Behaviour of Iron(III) Complexes with Hexa- and Heptadentate Thioether Salicylaldiminate Ligands
Journal article   Peer reviewed

Spin Crossover and Redox Behaviour of Iron(III) Complexes with Hexa- and Heptadentate Thioether Salicylaldiminate Ligands

V. V. Pavlishchuk, A. W. Addison, V. Chechersky, N. S. Kopelev and L. K. Thompson
Theoretical and experimental chemistry, v 61, pp 261-271
28 Mar 2026

Abstract

Chemistry Chemistry, Multidisciplinary Science & Technology Physical Sciences
Iron(III) complexes with potentially hexa- and heptadentate oligothioether salicylaldiminates were synthesized. Electron spin resonance and M & ouml;ssbauer spectra reveal the existence of spin crossover effects between 77 and 300 K. The compounds exhibit solvatochromic behaviour. Their cyclic voltammetry shows reversible one-electron electrochemical processes attributed to the iron(III)/iron(II) couple, while insertion of the additional (ether or thioether) donor atom into the ligand structure causes an anodic shift of the E1/2, the thioether sulfur-atom substantially so. Evidence is presented for heptacoordination in the unique complex entailing the unusual heptadentate N2O2S3 donor set.

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