Journal article
Zinc(II)-chloride complexes in acetonitrile-water mixtures
Australian Journal of Chemistry, Vol.43(2), pp.257-261
1990
Abstract
Equilibrium constants for the formation of ZnCln2-n complexes have been measured in some acetonitrile ( MeCN )-water mixtures ranging from 0 to 100% MeCN at 25°C and I = 0.1 M (Et4NClO4), by potentiometric titration. The equilibria shift strongly in favour of the formation of the higher-order complexes (n = 3, 4) at high MeCN concentrations. This is shown to be due to differences in the magnitude of unfavourable solvation of the Zn2+, Cl - and ZnCln2-n ions in MeCN-H2O solutions. The Gibbs free energies of transfer of all of these ions from water to MeCN-H2O mixtures are strongly positive, but the net change in the transfer function for the formation of the higher-order complexes is favourable. Thus the formation of these complexes is predominant in MeCN -rich aqueous solutions. Approximate measurements in propiononitrile indicate that the ZnCln2-n complexes are even stronger than in acetonitrile.
Details
- Title
- Zinc(II)-chloride complexes in acetonitrile-water mixtures
- Authors/Creators
- B.W. Clare (Author/Creator)G. Hefter (Author/Creator)P. Singh (Author/Creator)
- Publication Details
- Australian Journal of Chemistry, Vol.43(2), pp.257-261
- Publisher
- Commonwealth Scientific and Industrial Research Organization Publishing
- Identifiers
- 991005540381507891
- Copyright
- © CSIRO 1990
- Murdoch Affiliation
- School of Mathematical and Physical Sciences
- Language
- English
- Resource Type
- Journal article
Metrics
71 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Citation topics
- 2 Chemistry
- 2.89 Ionic, Molecular & Complex Liquids
- 2.89.462 Excess Molar Volumes
- Web Of Science research areas
- Chemistry, Multidisciplinary
- ESI research areas
- Chemistry