Synthesis, crystal structure, and structural features of hexa(isothiocyanate)chromates(III) of lanthanum(III) and neodymium(III) complexes with nicotinic acid |
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| Authors: | E V Cherkasova E V Peresypkina A V Virovets T G Cherkasova |
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| Institution: | 1. Kuzbass State Technical University, ul. Vesennyaya 28, Kemerovo, 650000, 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: | M(C5H5NCOO)3(H2O)2]Cr(NCS)6] · nH2O complexes, where M = La and n = 2 (1) or M = Nd and n = 1 (2), were synthesized by reacting M(NO3)3 (M = La, Nd, K3Cr(NCS)6]) and nicotinic acid (C5H5NCOO) in aqueous solution. Their structure was established by IR spectroscopy and X-ray diffraction analysis. The crystals of complexes 1 and 2 are monoclinic, space group P21/n, Z = 2; for complex 1, a = 9.66800(10) Å, b = 25.7662(2) Å, c = 15.4843(2) Å, β = 106.4700(10)sO, V = 3698.99(7) Å3, ρcalcd = 1.761 g/cm3; for complex 2, a = 9.53120(10) Å, b = 25.5166(4) Å, c = 15.3843(3) Å, β = 104.9450(10)sO, V = 3614.96(10) Å3, ρcalcd = 1.779 g/cm3. Different hydrate compositions of the given compounds may be due to the specific features of intermolecular interactions in their structures. |
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