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Golovnev, N. N.
Molokeev, M. S.
Samoilo, A. S.
Atuchin, V. V.
2017-06-16T10:22:30Z
2017-06-16T10:22:30Z
2016-06
Golovnev, N. N. Influence of alkyl substituents in 1,3-diethyl-2-thiobarbituric acid on the coordination environment in M(H2O)(2)(1,3-diethyl-2-thiobarbiturate)(2) M = Ca2+, Sr2+ [Текст] / N. N. Golovnev, M. S. Molokeev, A. S. Samoilo, V. V. Atuchin // Journal of Coordination Chemistry. — 2016. — Т. 69 (№ 6). — С. 957-965
00958972
http://elib.sfu-kras.ru/handle/2311/32951
Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала.
Two new isostructural complexes, [Ca(H2O)(2) (mu(2)-Detba-O,O')(2)](n) (1) and [Sr(H2O)(2)(mu(2)-Detba-O,O')(2)](n) (2) (HDetba = 1,3-diethyl-2-thiobarbituric acid), were synthesized and characterized by single-crystal and powder X-ray diffraction analysis, TG-DSC, FT-IR, and emission spectroscopy. The single-crystal X-ray diffraction data revealed that 1 and 2 are polymeric where M2+ (M = Ca, Sr) is a six-coordinate octahedral binding four Detba(-) ions and two water molecules. The octahedra are linked through bridging Detba(-) ions forming a 2-D layer. Two intermolecular hydrogen bonds O-H center dot center dot center dot S in the crystal form a 3-D net. The comparison of M(Detba)(2) and M(Htba)(2) (H(2)tba = 2-thiobarbituric acid) structures showed that the coordination number of metals in M(Detba)(2) does not exceed six and there are no pi-pi interactions, unlike compounds with Htba(-); Detba(-) ions are only bridges in HDetba coordination compounds. Thermal decomposition of 1 and 2 includes dehydration, which mainly ends at 200 degrees C, and organic ligand oxidation at 300-350 degrees C with a release of CO2, SO2, H2O, NH3, and isocyanate. Upon excitation at 220 nm, 1 and 2 exhibit an intense emission maximum at 557 nm.
http://www.tandfonline.com/doi/full/10.1080/00958972.2016.1149168
1
3-Diethyl-2-thiobarbituric acid
alkaline earth metals
coordination compound
X-ray diffraction
thermal analysis
Influence of alkyl substituents in 1,3-diethyl-2-thiobarbituric acid on the coordination environment in M(H2O)(2)(1,3-diethyl-2-thiobarbiturate)(2) M = Ca2+, Sr2+
Journal Article
Published Journal Article
957-965
31.17.29
2017-06-16T10:22:30Z
10.1080/00958972.2016.1149168
Институт цветных металлов и материаловедения
Кафедра физической и неорганической химии
Journal of Coordination Chemistry
Q2
Q3


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