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ScienceAsia 34 (2008): 440-442 |doi: 10.2306/scienceasia1513-1874.2008.34.440

Electrochemical properties of copper(I) halides and substituted thiourea complexes

Rattiya Chuaysong*, Pipat Chooto, Chaveng Pakawatchai

ABSTRACT:     The complexes between copper(I) halides and N,N′-diphenylthiourea have been investigated by cyclic voltammetry to compare their structure and behaviour in solid state with those in solution. The halides under investigation include chloride, bromide, and iodide. Chloride and bromide complexes did not show the redox reaction, suggesting that they formed the strongest bond with the metal and hence the oxidation was inhibited. In contrast, iodide behaved differently because of the two peaks of halide and trihalide oxidations. One peak disappeared, leaving the other halide-oxidized peak shifted to a more positive voltage due to the bonding with the metal. In solution, all complexes of N,N′-diphenylthiourea were derived from the oxidation process and exhibited oxidation potentials shifted to positive values.

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Department of Chemistry, Faculty of Science, Prince of Songkla University, Hatyai, Songkla 90112, Thailand

* Corresponding author, E-mail: kek315@hotmail.com

Received 8 May 2007, Accepted 14 Mar 2008