4 years ago

Renium(V) complexation with N -ethylthiourea

Dzh. A. Davlatshoeva, S. M. Safarmamadov, F. Dzh. Dzhamoliddinov, A. A. Amindzhanov


The stepwise complexation of rhenium(V) with N-ethylthiourea has been studied by the potentiometric method in 6 mol/L HCI at 298 K. It has been found that rhenium(V) forms five complex species with this ligand of the following compositions: [ReOLCl4], [ReOL2Cl3], [ReOL3Cl2]+, [ReOL4Cl]2+, and [ReOL5]3+. The calculated logarithms of stepwise formation constants of the complexes are the following: logK 1 = 4.10 ± 0.05, logK 2 = 3.16 ± 0.02, logK 3 = 2.61 ± 0.02, logK 4 = 2.26 ± 0.02, and logK 5 = 1.80 ± 0.02. It has been shown that the introduction of the ethyl radical into the thiourea molecule leads to an increase in the stability of rhenium(V) complexes.

Publisher URL: https://link.springer.com/article/10.1134/S003602361711002X

DOI: 10.1134/S003602361711002X

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