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Abstract

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.

Synthesis, structural characterization and in vitro cytotoxicity and anti-bacterial activity of some copper(I) complexes with N,N′-disubstituted thioureas

“…However, this does not rule out the presence of Cu(I) at all rather point toward the co-existence of Cu(I) and Cu(II) at the utmost. A similar study has been reported earlier for Cu(I) complexes with pyrimidinethiones and thioureas [37,38] e.g., in complex 2 [38], the difference in the first and second oxidation processes is about 0.56 V which is very much close to that of our case (7a), about 0.53 V. The possibility of complete nonexistence of Cu(I) was also investigated by allowing the complex in solution state for 1 week, the voltammetric behavior is shown in Fig. 1 (iii).…”

DNA recognition site of anticancer tinidazole copper(ii) complexes

“…S98 and S99†) show another wave at E 1/2 = 0.78 V corresponding to the Br − /Br 2 couple previously reported for bromide complexes. 47–49 This suggests that the reduction of copper( ii ) is possible through the oxidation of bromide according to eqn (2) in complex 4 .2Cu II + 2Br − → 2Cu I + Br 2 …”