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

Mohd. R. Razali; Anthony S. R. Chesman; Nicholas F. Chilton; Stuart K. Langley; Boujemaa Moubaraki; Keith S. Murray; Glen B. Deacon; Stuart R. Batten

doi:10.1039/C2DT32303F

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

Mohd. R. Razali, Anthony S. R. Chesman, Nicholas F. Chilton, Stuart K. Langley, Boujemaa Moubaraki, Keith S. Murray, Glen B. Deacon, Stuart R. Batten

Research output: Contribution to journal › Article › peer-review

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Abstract

A mixed-valence octanuclear manganese complex of formula [Mn^II₄Mn^III₄O₄(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 Mn^II ions) distorted [Mn^III₄O₄]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 Mn^IIIMn^III and Mn^IIIMn^II fragments in clusters of various types.

Original language	English
Pages (from-to)	1400-1405
Number of pages	6
Journal	Dalton Transactions
Volume	42
Issue number	5
DOIs	https://doi.org/10.1039/C2DT32303F
Publication status	Published - 19 Nov 2012
Externally published	Yes

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@article{ca92328eeadf4f0f840f9c3a80fc69bd,

title = "Structure and magnetism of a mixed-valence octanuclear manganese(ii/iii) cluster derived from carbamoylcyanonitrosomethanide (ccnm)",

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.",

author = "Razali, {Mohd. R.} and Chesman, {Anthony S. R.} and Chilton, {Nicholas F.} and Langley, {Stuart K.} and Boujemaa Moubaraki and Murray, {Keith S.} and Deacon, {Glen B.} and Batten, {Stuart R.}",

year = "2012",

month = nov,

day = "19",

doi = "10.1039/C2DT32303F",

language = "English",

volume = "42",

pages = "1400--1405",

journal = "Dalton Transactions",

issn = "1477-9226",

publisher = "Royal Society of Chemistry",

number = "5",

}

TY - JOUR

T1 - Structure and magnetism of a mixed-valence octanuclear manganese(ii/iii) cluster derived from carbamoylcyanonitrosomethanide (ccnm)

AU - Razali, Mohd. R.

AU - Chesman, Anthony S. R.

AU - Chilton, Nicholas F.

AU - Langley, Stuart K.

AU - Moubaraki, Boujemaa

AU - Murray, Keith S.

AU - Deacon, Glen B.

AU - Batten, Stuart R.

PY - 2012/11/19

Y1 - 2012/11/19

N2 - 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.

AB - 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.

U2 - 10.1039/C2DT32303F

DO - 10.1039/C2DT32303F

M3 - Article

SN - 1477-9226

VL - 42

SP - 1400

EP - 1405

JO - Dalton Transactions

JF - Dalton Transactions

IS - 5

ER -

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

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