Three manganese complexes of anionic N4-donor Schiff-base macrocycles: 1 monomeric Mn(II) and Mn(III), and dimeric Mn(IV)

Wilson, R. K., Dhers, S., Sproules, S. , McInnes, E. J.L. and Brooker, S. (2019) Three manganese complexes of anionic N4-donor Schiff-base macrocycles: 1 monomeric Mn(II) and Mn(III), and dimeric Mn(IV). Australian Journal of Chemistry, 72, pp. 805-810. (doi:10.1071/CH19209)

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Abstract

Three manganese macrocyclic complexes of two anionic N4-donor [1+1] Schiff-base macrocycles that differ in ring size (14 vs 16 membered), HLEt and HLPr (obtained from condensation of diphenylamine-2,2’-dicarboxaldehyde and either diethylenetriamine or dipropylenetriamine), are reported. Specifically, a pair of monomeric complexes MnIILEt(NCS)(H2O) and [MnIIILPr(NCS)2]•0.5H2O, plus a dimeric complex [MnIV2LEt2(O)2](ClO4)2•3DMF have been synthesised and characterised. Single crystal structure determinations on [MnIIILPr(NCS)2]•0.5H2O and [MnIV2LEt2(O)2](ClO4)2•3DMF revealed octahedral manganese centres in both cases: N6-coordinated Jahn-Teller distorted Mn(III) in the former and a pair of N4O2-coordinated Mn(IV) in the latter. UV-vis, IR and EPR spectroscopy as well as magnetic measurements are reported. These macrocyclic complexes feature a simple and original design, and could find future uses as models for manganese catalase or as building blocks for the assembly of larger supramolecular architectures.

Item Type:Articles
Additional Information:This work was supported by grants from the University of Otago (including a PhD scholarship for RKW) and the MacDiarmid Institute for Advanced Materials and Nanotechnology (including a PhD scholarship for SD). We are grateful for access to the EPSRC UK National EPR Facility.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Sproules, Dr Stephen
Authors: Wilson, R. K., Dhers, S., Sproules, S., McInnes, E. J.L., and Brooker, S.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Australian Journal of Chemistry
Publisher:CSIRO Publishing
ISSN:0004-9425
ISSN (Online):2041-6539
Published Online:26 July 2019
Copyright Holders:Copyright © 2019 CSIRO
First Published:First published in Australian Journal of Chemistry 72:805-810
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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