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Coordination of gold(III) in the chemisorption by cadmium diisobutyldithiocarbamate: Structure and thermal properties of the polynuclear gold-cadmium complex [Au“S2CN(iso-C4H9)2”2]2n [CdCl4] n

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Abstract

Gold(III) is coordinated by binuclear cadmium diisobutyldithiocarbamate (Dtc) via chemisorption to give a heteropolynuclear Au(III)-Cd complex of the formula [Au“S2CN(iso-C4H9)2”2]2n [CdCl4] n (I). According to X-ray diffraction data, structure I contains three structurally nonequivalent complex cations [Au“S2CN(iso-C4H9)2”2]+. These cations are conformers. Relatively weak nonvalence interactions produce zigzag polymer chains of the type (...C...A...B...A...) n with alternating nonequivalent cations A, B, and C in a ratio of 2: 1: 1. The anions [CdCl4]2− are localized at the side. The calculated theoretical chemisorption capacity of cadmium Dtc with respect to [AuCl4]− is 378.0 mg of Au3+ per gram of the sorbent. To optimize the conditions for isolation of sorbed gold, the thermal properties of complex I were studied by simultaneous thermal analysis. The two-step thermolysis of complex I involves (1) thermal decomposition of the dithiocarbamate part and [CdCl4]2− with liberation of metallic gold and cadmium dichloride and (2) evaporation of CdCl2. The final thermolysis product of complex I is reduced metallic gold.

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Authors and Affiliations

  1. Institute of Geology and Nature Management, Amur Scientific Center, Far East Division, Russian Academy of Sciences, Blagoveshchensk, 675000, Russia

    O. V. Loseva, A. V. Ivanov, T. A. Rodina & T. S. Filippova

  2. Institute of Chemistry, Far East Division, Russian Academy of Sciences, pr. Stoletiya Vladivostoka 159, Vladivostok, 690022, Russia

    A. V. Gerasimenko

Authors
  1. O. V. Loseva
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  2. A. V. Ivanov
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  3. A. V. Gerasimenko
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  4. T. A. Rodina
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  5. T. S. Filippova
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Correspondence to A. V. Ivanov.

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Original Russian Text © O.V. Loseva, A. V. Ivanov, A.V. Gerasimenko, T.A. Rodina, T.S. Filippova, 2010, published in Koordinatsionnaya Khimiya, 2010, vol. 36, No. 1, pp. 3–9.

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Loseva, O.V., Ivanov, A.V., Gerasimenko, A.V. et al. Coordination of gold(III) in the chemisorption by cadmium diisobutyldithiocarbamate: Structure and thermal properties of the polynuclear gold-cadmium complex [Au“S2CN(iso-C4H9)2”2]2n [CdCl4] n . Russ J Coord Chem 36, 1–8 (2010). https://doi.org/10.1134/S107032841001001X

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  • DOI: https://doi.org/10.1134/S107032841001001X

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