Crystal structure and properties of the precursor [Ni(H2O)(6)j(HTBA)(2)center dot 2H(2)O and the complexes M(HTBA)(2)(H2O)(2) (M = Ni, Co, Fe)


Тип публикации: статья из журнала

Год издания: 2014

Идентификатор DOI: 10.1016/j.poly.2013.12.021

Ключевые слова: 2-Thiobarbiturate complexes, 3D elements, Synthesis, Structure, IR spectra, Thermal stability

Аннотация: Four new compounds, the discrete complex [Ni(H2O)(6)](HTBA)2-2H(2)O (1) and the polymers Ni(H2O)(2) (HTBA-O,S)(2) (2), Co(H2O)2(HTBA-O,S)(2) (3) and Fe(H2O)(2)(HTBA-O,S)(2) (4) (H2TBA = 2-thiobarbituric acid, C4H4N2O2S), have been synthesized and structurally characterized. The structure of 1 has been solved by X-ray single-crystalПоказать полностьюdiffraction analysis. The Ni(H2O)62+ cation has an almost ideal octahedral geometry, and there is no coordination of Ni(II) by HTBA- in I. Complexes 2-4 have been characterized by powder XRD, TG-DSC and FT-IR. In the isostructural polymers 2-4, the metals are six-coordinated, and the octahedrons are connected by H2O,S bridging ligands. Each of the M(II) ions is surrounded by two water molecules, two O-coordinated HTBA- ions and two S-coordinated HTBA- ions, with all pairs being in trans-positions. Hydrogen bonding and gt-Tc interactions play an important role for the construction of the supramolecular 3D structures of 2-4. The formation of the complexes has been evidenced by infrared spectroscopy. The thermal decomposition of 2-4 under oxidative conditions has been divided into three major stages: dehydration, oxidative degradation of the organic moiety and transformation of the inorganic residue. (C) 2013 Elsevier Ltd. All rights reserved.

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Выпуск журнала: Vol. 70

Номера страниц: 71-76

ISSN журнала: 02775387

Место издания: OXFORD



  • Golovnev Nicolay N. (Siberian Fed Univ, Dept Chem, Krasnoyarsk 660041, Russia)
  • Molokeev Maxim S. (SB RAS, LV Kirensky Phys Inst, Lab Crystal Phys, Krasnoyarsk 660036, Russia)
  • Vereshchagin Sergey N. (SB RAS, Inst Chem & Chem Technol, Lab Catalyt Convers Small Mol, Krasnoyarsk 660036, Russia)
  • Atuchin Victor V. (SB RAS, Inst Semicond Phys, Lab Opt Mat & Struct, Novosibirsk 630090, Russia; Tomsk State Univ, Tomsk 634050, Russia)
  • Sidorenko Maxim Y. (Siberian Fed Univ, Dept Chem, Krasnoyarsk 660041, Russia)
  • Dmitrushkov Michael S. (Siberian Fed Univ, Dept Chem, Krasnoyarsk 660041, Russia)