Issue 16, 2004
From the journal:

Dalton Transactions

Synthesis and studies of a trinuclear Mn(ii) carboxylate complex

Paul Christian,a   Gopalan Rajaraman,a   Andrew Harrison,b   Madeleine Helliwell,a   Joseph J. W. McDouall,a   James Rafterya  and  Richard E. P. Winpenny*b  

* Corresponding authors

a Department of Chemistry, The University of Manchester, Oxford Road, Manchester

b Department of Chemistry, The University of Edinburgh, West Mains Road, Edinburgh

Abstract

We report a carboxylate triangle consisting of three manganese(II) centres which is made from manganese(II) carbonate and pivalic acid. The magnetic exchange within the triangle is extremely weak, and antiferromagnetic. Several models have been used to fit the magnetic data, and the best fit uses two weak antiferromagnetic coupling constants of J1 = −0.588 cm−1 and J2 = −0.855 cm−1. Exchange interactions between the metal centres has been calculated using DFT adopting all the three possible Heisenberg models for a trinuclear system and the results are compared with experimental values. Spin density distribution is used to analyse the nature of the coupling between the metal centres. EPR spectroscopy has been used to explore the nature of the ground state. Recrystallisation of the trinuclear compound from MeCN gives a polymer, while oxidation in air leads to a known compound—an edge-sharing bitetrahedral {MnIII2MnII4} cage.

Graphical abstract: Synthesis and studies of a trinuclear Mn(ii) carboxylate complex

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Article information

DOI
https://doi.org/10.1039/B407126C
Article type
Paper
Submitted
11 May 2004
Accepted
17 Jun 2004
First published
19 Jul 2004

Dalton Trans., 2004, 2550-2555

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Synthesis and studies of a trinuclear Mn(II) carboxylate complex

P. Christian, G. Rajaraman, A. Harrison, M. Helliwell, J. J. W. McDouall, J. Raftery and R. E. P. Winpenny, Dalton Trans., 2004, 2550 DOI: 10.1039/B407126C

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