Journal article

Heteroleptic iron(III) Schiff base spin crossover complexes: halogen substitution, solvent loss and crystallite size effects

Wasinee Phonsri, David S Macedo, Casey G Davies, Guy NL Jameson, Boujemaa Moubaraki, Keith S Murray

DALTON TRANSACTIONS | ROYAL SOC CHEMISTRY | Published : 2017

Abstract

The influence of the halogen substituent on the qsal moiety of iron(iii) heteroleptic compounds with the formulae [Fe(qsal-X)(thsa)]·nMeCN, where qsal-X- = X-substituted quinolylsalicylaldimine; thsa2- = thiosemicarbazone-salicylaldiminate; X = F; n = 2.5, 1·2.5MeCN and X = Cl 2, Br 3 and I 4, n = 1 (labelled 2·MeCN, 3·MeCN and 4·MeCN, respectively) has been systematically investigated. Magnetic studies on solid samples show incomplete spin crossover in 1-3 which can be related to MeCN solvent loss. Complex 4·MeCN remains fully LS up to 360 K. Single crystals have been examined at variable temperatures for samples possessing different degrees of solvation. Intermolecular C-XH interactions ar..

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Funding Acknowledgements

This work was supported by an Australian Research Council Discovery grant (to KSM). Access to the Australian Synchrotron is gratefully acknowledged.