DOI

Crystals of four amine-templated layered uranyl selenates, [C 2H10N2][(UO2)(SeO4) 2(H2O)](H2O) (1), [CH6N 3]2[(UO2)(SeO4)2(H 2O)](H2O)1.5 (2), [C4H 12N]2[(UO2)(SeO4)2(H 2O)] (3), and [CH6N3]3[(UO 2)2(SeO4)2(H(SeO4) 2)](H2O)2 (4) were prepared by evaporation from aqueous solution of uranyl nitrate, selenic acid and the respective amine. The structures of all four compounds have been solved by direct methods. The structures of 1 (monoclinic, C2/c, a = 11.787(2), b = 7.7007(10), c = 16.600(3) Å, β = 102.016(14)°, V = 1473.7(4) Å3, R 1 = 0.037 for 1743 unique observed reflections), 2 (monoclinic, C2/c, a = 37.314(4), b = 7.1771(6), c = 13.2054(14) Å, β = 109.267(8)°, V = 3338.4(6) Å3, R1 = 0.088 for 3005 unique observed reflections) and 3 (monoclinic, C2/c, a = 27.212(10), b = 7.372(3), c = 23.113(7) Å, β = 117.75(2)°, V = 4103(3) Å3, R1 = 0.073 for 2111 unique observed reflections) are based on sheets of the composition [(UO2)(SeO4) 2(H2O)]2- consisting of pentagonal [UO 7]8- pentagonal bipyramids linked via [SeO 4]2- tetrahedra. The sheets have the same chemical composition but different topologies. The structure of 4 (orthorhombic, P2 12121, a = 10.7261(9), b = 13.918(2), c = 18.321(2) Å, V = 2735.1(5) Å3, R1 = 0.050 for 5683 unique observed reflections) contains [(UO2) 2(SeO4)2(H(SeO4)2)] 3- sheets parallel to (001). In all four structures, the layers are connected via protonated amine and H2O molecules.

Язык оригиналаанглийский
Страницы (с-по)2358-2364
Число страниц7
ЖурналZeitschrift fur Anorganische und Allgemeine Chemie
Том631
Номер выпуска12
DOI
СостояниеОпубликовано - 29 сен 2005

    Предметные области Scopus

  • Неорганическая химия

ID: 49256373