Thulium(III) trifluoroacetates Tm(CF3COO)(3) center dot 3H(2)O and Tm-2(CF3COO)(6) center dot 2CF(3)COOH center dot 3H(2)O: Synthesis and crystal structure

Gutnikov, S.I.; Karpova, E.V.; Zakharov, M.A.; Boltalin, A.I.

Авторы: Gutnikov S.I., Karpova E.V., Zakharov M.A., Boltalin A.I.
Журнал: Russian Journal of Inorganic Chemistry
Том: 51
Номер: 4
Год издания: 2006
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 541
Последняя страница: 548
DOI: 10.1134/S0036023606040061
Аннотация: Thulium trifluoroacetate compounds have been synthesized, Tm(CF3COO)(3) center dot 3H(2)O (I) and Tm-2(CF3COO)(6) center dot 2CF(3)COOH center dot 3H(2)O (II). The structure of I has been refined by the Rietveld method on the basis of the structural data for Cd(CF3COO)(3) center dot 3H(2)O. The structure of II has been solved in a single-crystal X-ray diffraction study. Compound I has been studied by thermal analysis. Crystals of I and II are monoclinic: for I a = 9.062(2) angstrom, b = 18.678(3) angstrom, c = 9.687(2) angstrom, beta = 113.93(1)degrees, Z = 2, space group P2(1)/c, R (1) = 0.062; for II a = 8.560(4) angstrom, b = 19.866(5) angstrom, c = 20.813(7) angstrom, beta = 101.69(4)degrees, Z = 8, space group C2/c, R (1) = 0.0392. In the molecular structure of I, thulium atoms are bonded in pairs through four bridging trifluoroacetate anions to form dimers. The coordination polyhedron of the thulium atom also includes the three O atoms of the water molecules and the O atom of the monodentate trifluoroacetate group; the coordination number of the thulium atom is eight. In the chain structure of II, there are two crystallographically independent thulium atoms with coordination numbers 8 and 9. The coordination polyhedra of the Tm(1) and Tm(2) atoms are a distorted monocapped tetragonal antiprism and a distorted tetragonal antiprism, respectively. The Tm-O bond lengths are in the range 2.28(1)-2.85(2) angstrom. The thulium atoms are bound into chains through carboxylate groups. These chains are linked into layers through hydrogen bonds.
Добавил в систему: Болталин Александр Иванович

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Thulium(III) trifluoroacetates Tm(CF3COO)(3) center dot 3H(2)O and Tm-2(CF3COO)(6) center dot 2CF(3)COOH center dot 3H(2)O: Synthesis and crystal structureстатья

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