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Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH ARTICLE

Insights into the Chemistry and Structural Features of the Copper(ii) 2,2′-Bipyridyl–Thiosulfate System

Eric W. Ainscough A B , Sidney S. Woodhouse A , Andrew M. Brodie A B , Graham H. Freeman A and Paul G. Plieger https://orcid.org/0000-0003-4886-7677 A C
+ Author Affiliations
- Author Affiliations

A School of Fundamental Sciences, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand.

B Deceased.

C Corresponding author. Email: p.g.plieger@massey.ac.nz

Australian Journal of Chemistry 73(1) 43-48 https://doi.org/10.1071/CH19535
Submitted: 19 October 2019  Accepted: 11 November 2019   Published: 16 December 2019

Abstract

In this paper, we present our findings on a series of copper(ii) 2,2′-bipyridyl (bipy) complexes that inhibit the oxidation of thiosulfate, a current problem in the gold leaching process. The formation of six complexes, five of which have been structurally characterized by X-ray crystallography, illustrate a thermally induced, controllable switching between oxidation states, which in turn inhibits the oxidation of thiosulfate. These findings give further insight and understanding into the rich chemistry of the coinage metals and the hydrolytic processes involved with gold leaching.


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