Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2015

Идентификатор DOI: 10.1080/00958972.2015.1031119

Ключевые слова: Neodymium, 2-Thiobarbituric acid, Crystal structure, Thermal decomposition, IR spectroscopy

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.

Журнал: JOURNAL OF COORDINATION CHEMISTRY

Выпуск журнала: Vol. 68, Is. 11

Номера страниц: 1865-1877

ISSN журнала: 00958972

Место издания: ABINGDON

Издатель: TAYLOR & FRANCIS LTD

• Golovnev N.N. (Siberian Fed Univ, Dept Chem, Krasnoyarsk, Russia)
• Molokeev M.S. (SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk, Russia; Far Eastern State Transport Univ, Dept Phys, Khabarovsk, Russia)
• Vereshchagin S.N. (SB RAS, Inst Chem & Chem Technol, Lab Catalyt Convers Small Mol, Krasnoyarsk, Russia)
• Atuchin V.V. (SB RAS, Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk, Russia; Tomsk State Univ, Funct Elect Lab, Tomsk 634050, Russia; Novosibirsk State Univ, Lab Semicond & Dielect Mat, Novosibirsk 630090, Russia)

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