X-ray crystallographic study of crystalline products of interaction of lanthanum(III) nitrate, ammonium tetra(isothiocyanato)diamminechromate(III) and dimethyl sulfoxide in an aqueous solution |
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| Authors: | I V Isakova E V Peresypkina A V Virovets T G Cherkasova |
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| Institution: | 1. Kuzbass State Technical University, Kemerovo, 650026, Russia
2. Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent??eva 3, Novosibirsk, 630090, Russia
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| Abstract: | A new complex La(Dmso)9]Cr(NH3)2(NCS)4]3 · 4DMSO (I) was synthesized by the reaction of lanthanum(III) nitrate, ammonium tetra(isothiocyanato)diamminechromate(III), and dimethyl sulfoxide and structurally characterized. The crystals are monoclinic, space group C2/c, a = 14.5550(4) ?, b = 25.8826(7) ?, c = 25.5262(6) ?, ?? = 96.5180(10)°, V = 9554.1(4) ?3, Z = 4, ??calc = 1.467 g/cm3. A freshly precipitated fine crystalline powder corresponds to compound I according to X-ray powder diffraction. However, long-term crystallization leads to formation of at least another four crystalline products: two of them were not characterized because of the poor quality of crystals, the third product was identified as the known complex La(NO3)3(Dmso)4, and the fourth product was identified by X-ray crystallography as the mixed-ligand complex La(Dmso)6(NO3)(NCS)]Cr(NH3)2(NCS)4] · 3Dmso (II) with an island structures. The crystals are monoclinic, space group P21/n, a = 18.8026(8) ?, b = 14.9453(5) ?, c = 20.4411(9) ?, ?? = 99.2720(10)°, V = 5669.1(4) ?3, Z = 4, ??calc = 1.500 g/cm3. |
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