Synthesis and crystal structure of [Co(NH3)6][AuX4]X2 (X = Cl−, Br−) |
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| Authors: | E. V. Makotchenko I. A. Baidina P. E. Plyusnin |
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| Affiliation: | (1) A. V. Nikolaev Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, Novosibirsk |
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| Abstract: | [Co(NH3)6][AuX4]X2 binary complex salts, where X = Cl? (I) and Br? (II), have been obtained and defined by element, X-ray diffraction, and thermal analyses and by IR, Raman, and electron spectroscopy. The compounds are isostructural. Their structural units are the [Co(NH3)6]3+ complex cations, the [AuX4]? complex anions, and the X? anions. The plane square environment of the gold atom is completed to an elongated bipyramid by two halide ions lying at distances Au...Cl 3.245 Å for I and Au...Br 3.362 Å for II. The thermolysis products of I and II are pure gold and cobalt metal powders when thermolysis is performed under hydrogen and a mixture of metallic gold with cobalt halide in a reaction under an inert atmosphere. |
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| Keywords: | binary complex salts of cobalt(III) hexaammoniate gold(III) tetrahalides ythesis crystal structure thermolysis |
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