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

被引：8

作者：

Razali, Mohd. R. ^{[1
,2
]}

Chesman, Anthony S. R. ^{[1
,3
]}

Chilton, Nicholas F. ^{[1
]}

Langley, Stuart K. ^{[1
]}

Moubaraki, Boujemaa ^{[1
]}

Murray, Keith S. ^{[1
]}

Deacon, Glen B. ^{[1
]}

Batten, Stuart R. ^{[1
]}

机构：

[1] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia

[2] Univ Sci Malaysia, Sch Chem Sci, George Town 11800, Malaysia

[3] CSIRO Mat Sci & Engn, Clayton, Vic 3168, Australia

来源：

DALTON TRANSACTIONS | 2013年 / 42卷 / 05期

关键词：

SINGLE-MOLECULE MAGNETS; CRYSTAL-STRUCTURE; NUCLEOPHILIC-ADDITION; CARBOXYLATE CLUSTERS; TETRANUCLEAR; COMPLEXES; CHEMISTRY; MN-8;

D O I：

10.1039/c2dt32303f

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A mixed-valence octanuclear manganese complex of formula [(Mn4Mn4O4)-Mn-II-O-III(ccnm)(12)]center dot 4MeCN center dot 7H(2)O (1 center dot 4MeCN center dot 7H(2)O) (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 Mn-II ions) distorted [(Mn4O4)-O-III](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 Mn-8 cluster and, more generally, with other (MnMnIII)-Mn-III and (MnMnII)-Mn-III fragments in clusters of various types.

引用

页码：1400 / 1405

页数：6

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