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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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Publication details

The article was received on 01 Oct 2012, accepted on 30 Oct 2012 and first published on 19 Nov 2012


Article type: Paper
DOI: 10.1039/C2DT32303F
Citation: Dalton Trans., 2013,42, 1400-1405
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    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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