The crystal structure and magnetic properties of tetra-µ3-methoxytetrakis[salicylaldehydato(ethanol)nickel(II)]
- 1 January 1969
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 1456-1461
- https://doi.org/10.1039/j19690001456
Abstract
The crystal structure of [Ni(OMe)(o-O·C6H4·CHO)(EtOH)]4 has been determined by three-dimensional single-crystal X-ray methods. Four molecules of point symmetry (S4) occupy a tetragonal unit cell with a= 22·17, c= 9·70 Å in space group I41/a. The four nickel atoms in the molecule occupy the corners of a nearly regular tetrahedron with a bridging OMe group above each face, giving a roughly cubic Ni4O4 unit of symmetry close to Td. Approximately octahedral co-ordination of the nickel(II) ions is completed by four ethanol molecules and four chelated salicylaldehyde anions. The dimensions of the Ni4O4 unit are: Ni–O ca. 2·04 Å, Ni–O–Ni ca. 98°. O–Ni–O ca. 82°. The magnetic susceptibility of the compound between 80 and 300°K indicates a weak ferromagnetic exchange interaction between the Ni2+ ions (J/k=+10°), and the behaviour of the analogous methanol derivative is similar (J/k=+6°). The magnetic properties are discussed in terms of the structure.Keywords
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