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Issue 5, 2013
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Structure and magnetism of a mixed-valence octanuclear manganese(ii/iii) cluster derived from carbamoylcyanonitrosomethanide (ccnm)

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Abstract

A mixed-valence octanuclear manganese complex of formula [MnII4MnIII4O4(ccnm)12]·4MeCN·7H2O (1·4MeCN·7H2O) (ccnm = carbamoylcyanonitrosomethanide) has been synthesized and characterized by single crystal X-ray diffraction, IR spectroscopy, elemental analysis and magnetic measurements. The metal core of 1 adopts a tetra-capped (with MnII ions) distorted [MnIII4O4]4+ cubane topology, with a three-J magnetic analysis indicating that the cluster displays dominant antiferromagnetic interactions. Three equally possible fits were obtained, all leading to a spin ground state of S = 0 with S = 1, 2 and 3 close in energy. Comparisons of the magnetic analysis are made with that published for a related Mn8 cluster and, more generally, with other MnIIIMnIII and MnIIIMnII fragments in clusters of various types.

Graphical abstract: Structure and magnetism of a mixed-valence octanuclear manganese(ii/iii) cluster derived from carbamoylcyanonitrosomethanide (ccnm)

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Article information


Submitted
01 Oct 2012
Accepted
30 Oct 2012
First published
19 Nov 2012

Dalton Trans., 2013,42, 1400-1405
Article type
Paper

Structure and magnetism of a mixed-valence octanuclear manganese(II/III) cluster derived from carbamoylcyanonitrosomethanide (ccnm)

Mohd. R. Razali, A. S. R. Chesman, N. F. Chilton, S. K. Langley, B. Moubaraki, K. S. Murray, G. B. Deacon and S. R. Batten, Dalton Trans., 2013, 42, 1400
DOI: 10.1039/C2DT32303F

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