Yttrium thiocyanate-based supramolecular architectures: Synthesis, crystal structures, and thermal properties |
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| Authors: | Andrey Ilyukhin Zhanna DobrokhotovaSvetlana Petrosyants Vladimir Novotortsev |
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| Institution: | N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 31, 119991 Moscow, GSP-1, Russian Federation |
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| Abstract: | The reaction of Y(H2O)5(NCS)3]·H2O (1) with crown ether (18-crown-6) and KNCS in methanol afforded the complexes Y(H2O)4(NCS)3]·1.5(18-crown-6) (2) and K(18-crown-6)(H2O)1.25]2n{K(18-crown-6)]2Y(NCS)6]}n·n(NCS) (3). In mononuclear complex 1, yttrium has a coordination number 8 and forms the coordination unit YO5N3. Complexes 1 are linked by hydrogen bonds to form a framework. The crystal structure of 2 contains the centrosymmetric ensembles Y(H2O)4(NCS)3]2(18-crown-6)3 formed via hydrogen bonds. In the crystal structure of 3, the Y(NCS)6]3− anions and the K(18-crown-6)]+ cations form one-dimensional polymeric chains (-Y-NCS-K-)n. The thermal behavior of compounds 1 and 2 was investigated. It was shown that the supramolecular assembly has an effect on the temperature range for the removal of coordinated water molecules from the thiocyanate complex. The oxidative decomposition of the acido ligands in 1 and 2 occurs in a similar way to give Y2O2SO4 as the final product (700 °С). |
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| Keywords: | Yttrium Thiocyanate Crown ether X-ray analysis Supramolecular ensembles Thermal decomposition |
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