Synthesis and thermal transformation of a neodymium(III) complex [Nd(HTBA)(2)(C2H3O2)(H2O)(2)]center dot 2H(2)O to non-centrosymmetric oxosulfate Nd2O2SO4
Библиографическое описание:Synthesis and thermal transformation of a neodymium(III) complex [Nd(HTBA)(2)(C2H3O2)(H2O)(2)]center dot 2H(2)O to non-centrosymmetric oxosulfate Nd2O2SO4 / N. N. Golovnev [et al.]. - Текст : непосредственный // J. Coord. Chem. - 2015. - Vol. 68, Is. 11. - P. 1865-1877. - Cited Reference Count: 59. - Гранты: The study was carried out within the public task of the Ministry of Education and Science of the Russian Federation for research engineering at the Siberian Federal University in 2014. V.V.A. is grateful to the Ministry of Education and Science of the Russian Federation for the financial support of this investigation. - Финансирующая организация: Ministry of Education and Science of the Russian Federation. - ISSN 0095-8972. - ISSN 1029-0389, DOI 10.1080/00958972.2015.1031119.
Аннотация:Neodymium complex [Nd(HTBA)(2)(C2H3O2)(H2O)(2)](n)2nH(2)O (1) (H(2)TBA=2-thiobarbituric acid, C4H4N2O2S) has been synthesized in an aqueous solution at 80-90 degrees C. The crystal structure of 1 has been determined by the Rietveld method in space group P2(1)/n, a=8.5939(2), b=22.9953(5), c=10.1832(2)angstrom, =112.838(1)degrees, Z=4, and R=0.0181. In 1, the Nd(III) is coordinated by four (2)-HTBA(-) ions through O, three oxygens from two (2)-(2):(1)-bridging CH3COO- anions, and two terminal waters with a tri-capped trigonal prism structure. The prisms form an edge-contact pair through two O from two acetates. The pairs are connected by HTBA(-) and form a 3-D framework. The principle product of thermal decomposition of 1 at>750 degrees C is Nd2O2SO4 (2). The crystal structure of 2 has been obtained in space group I222, a=4.1199(4), b=4.2233(4), c=13.3490(12)angstrom, Z=2, and R=0.0246. The structure is related to an orthorhombic structure type of M2O2SO4 (M=Ln) compounds. In 2, the Nd3+ is coordinated by six oxygens in a trigonal prism. Each NdO6 prism links with two SO4 tetrahedra by nodes, with four other NdO6 prisms by edges, and with four other NdO6 prisms by nodes, and the units form the 3-D frame. In the frame, the layers of SO4 tetrahedra are alternated by two NdO6 prism layers.
