Incorporation of a tripodal ligand with a (N,O,O)-donor set into a new family of nickel and cobalt spin clusters

Kerwyn G Alley, Roland Bircher, Hans U Gudel, Boujemaa Moubaraki, Keith Spencer Murray, Brendan Francis Abrahams, Colette Boskovic

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Abstract

The reaction of Ni(OAc)(2), NiX2 (X = Cl, Br) or CoCl2 with the proligand 2-amino-2-methyl-1,3-propanediol (ampdH(2),) affords a new family of tetranuclear complexes. The syntheses of [Ni-4(OAC)4(ampdH)(4)] (1) and [M4X4(ampdH)(4)] (M = Ni, X = Cl, 2; M = Ni, X = Br, 3; M = Co, X = Cl, 4) are reported, together with the single crystal X-ray structures of 1, 2 and 4 and the magnetochemical characterization of 1, 3 and 4. Each member of this family of complexes displays a low symmetry structure that incorporates a M4O4 core unit based on a distorted cubane. Magnetic measurements reveal ferromagnetic exchange interactions for 1, 3 and 4. These give rise to S = 4 ground state spins for the tetranuclear Ni complexes and an anisotropic effective S = 2 ground state for the Co complex. Crown Copyright (c) 2006 Published by Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)369 - 377
Number of pages9
JournalPolyhedron
Volume26
Issue number2
Publication statusPublished - 2007

Cite this

Alley, K. G., Bircher, R., Gudel, H. U., Moubaraki, B., Murray, K. S., Abrahams, B. F., & Boskovic, C. (2007). Incorporation of a tripodal ligand with a (N,O,O)-donor set into a new family of nickel and cobalt spin clusters. Polyhedron, 26(2), 369 - 377.