Influence of temperature and concentration upon nickel(II) chloride interactions in dimethyl sulphoxide
- 1 January 1970
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 827-833
- https://doi.org/10.1039/j19700000827
Abstract
The chloro-nickel(II) complexes obtained in dimethyl sulphoxide (DMSO) are described, viz., the octahedral complexes [NiCl(DMSO)5]+ and [NiCl2(DMSO)4]0 and the tetrahedral complexes [NiCl3(DMSO)]– and NiCl4 2–. It is shown that the tetrahedral species produced on warming a solution of NiCl2 is [NiCl3(DMSO)]–, not NiCl4 2– as previously claimed. The effect of temperature upon the various equilibria existing in solution at different Cl : Ni mole ratios is discussed and the effect of cation variation is noted. For the equilibrium [NiCl2(DMSO)4]0+ Cl–⇌[NiCl3(DMSO)]–+ 3DMSO, ΔH was calculated to be +13·3 ± 0·3 kcal. mole–1.Keywords
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