期刊
RUSSIAN CHEMICAL BULLETIN
卷 61, 期 11, 页码 2056-2064出版社
SPRINGER
DOI: 10.1007/s11172-012-0287-z
关键词
yttrium; chloride; crown ether; thermal decomposition
资金
- Russian Foundation for Basic Research [11-03-00644]
- Council on Grants at the President of the Russian Federation (Program for State Support of Leading Scientific Schools of the Russian Federation) [NSh-1670.2012.3]
- Ministry of Education and Science of the Russian Federation (Federal Contract) [GKP8437]
- Russian Academy of Sciences (Target Programs of the Division of Chemistry and Materials Science of the Russian Academy of Sciences)
- Russian Academy of Sciences (Presidium of the Russian Academy of Sciences)
The reactions of [YCl2(H2O)(6)]Cl with 18-crown-6 in aliphatic alcohol solutions afford the complexes [Y(H2O)(3)(18-crown-6)]Cl-3 center dot 1.25H(2)O (1) and [Y(H2O)(8)]Cl-3 center dot(18-crown-6)center dot 4H(2)O (2), in which the inner coordination sphere of yttrium consists of nine and eight oxygen atoms, respectively. The inner-sphere transformations of complexes 1 and 2 under conditions of solid-state thermolysis were investigated. After the removal of coordinated water molecules from compound 1, the complex undergoes a structural transformation at temperatures above 180 A degrees C, resulting in that two chloride anions enter into the coordination sphere of yttrium. For compound 2, a double exothermic effect is observed in the temperature range of 160-300 A degrees C due to the formation of a certain new structural species containing chloride ions and 18-crown-6 in the inner coordination sphere.
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