Vanadoantimonates: from discrete clusters to high dimensional aggregates†
Abstract
Five new vanadoantimonates [Cd(en)3]3[Sb6V15O42(H2O)]·8H2O (1), [Ni(en)3]2[H2Sb6V15O42(H2O)]·5H2O (2), [Co(en)3]2[H2Sb6V15O42(H2O)]·5H2O (3), [H4Sb8V14O42(H2O)]·5H2O (4) and [Co(enMe)3]2[Sb8V14O42(H2O)]·4H2O (5) (en = ethylenediamine, enMe = 1,2-propanediamine) have been obtained under hydrothermal conditions and characterized by IR, UV-Vis, XRD, ESR and CD spectroscopy. Compound 1 is a chiral compound constructed from [Sb6V15O42(H2O)]6− (Sb6V15) and [Cd(en)3]2+. Compounds 2 and 3 are isostructural and isomorphous. Both compounds are chiral, each of which contains a 2-D inorganic layer formed by [H2Sb6V15O42(H2O)]4−via V–O⋯Sb contacts. Compound 4 contains a 2-D inorganic layer formed by [H4Sb8V14O42(H2O)], of which [H4Sb8V14O42(H2O)] is directed by both V–O⋯Sb and Sb–O⋯Sb interactions. Compound 5 contains a 1-D zigzag chain structure formed by [Sb8V14O42(H2O)]4− (Sb8V14) via Sb–O⋯Sb contacts.