Tetrahedral complexes of nickel(II) with benzimidazole
- 1 January 1967
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 1676-1679
- https://doi.org/10.1039/j19670001676
Abstract
The preparations are described of the benzimidazole (=L) complexes, NiL2X2(X = Br or I) and (Et4N)(NiLBr3). From their electronic spectra and magnetic properties these compounds are assigned pseudo-tetrahedral configurations, but with pronounced departures from Td symmetry. The magnetic moments of NiL2Br2 and (Et4N)(NiLBr3) decrease from 3·46 and 3·57 B.M., respectively, at room temperature to about the spin-only value at ca. 4·2°K. The moments of (MePh3As)2NiCl4 and Ni(Ph3P)2Cl2, at ca. 4·2°K are 0·70 and 2·20 B.M., respectively. Solution equilibria between 2 : 1 and 4 : 1 complexes of L with the nickel halides are also reported.Keywords
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