title: A vanadium tellurate, (NH(4))(2)[VO(2)](2)[TeO(4)(OH)(2)], containing two edge-shared square-pyramidal VO(5) groups.
abstract: A new ammonium vanadium tellurate, (NH(4))(2)[VO(2)](2)[TeO(4)(OH)(2)] (1), was hydrothermally synthesized and characterized by single-crystal X-ray diffraction, elemental analysis, IR spectroscopy, and TG analysis. Compound 1 crystallizes in the monoclinic system, space group P2(1)/n: a = 8.9112(18) A, b = 15.151(3) A, c = 15.187(3) A, beta = 97.91(3)(o), V = 2030.9(7) A(3), Z = 8, R1 (I > 2sigma(I)) = 0.0295, wR2 (all data) = 0.0631. The structure of 1 consists of infinite anionic chains, {[VO(2)](2)[TeO(4)(OH)(2)]}(2-), of edge-sharing VO(5) square pyramids and TeO(4)(OH)(2) octahedra. Two VO(5) square pyramids are joined together by sharing their edge to form a V(2)O(8) binuclear unit. The V(2)O(8) and TeO(4)(OH)(2) units are alternatively connected to each other by sharing their edges to complete infinite zigzag anionic {[VO(2)](2)[TeO(4)(OH)(2)]}(2-) chains. The structure contains an extended network of O-H...O hydrogen bonds between the chains. The network of intermolecular hydrogen bonding results in layers parallel to the ab plane. Ammonium cations are hydrogen-bonded either to the oxygen atoms of the anionic chains or to each other in a complex arrangement.
authors: Department of Chemistry, Konkuk University, Seoul 143-701, Republic of Korea.
authors: Gyiae
authors: G
authors: Yun
authors: Yunmi
authors: Y
authors: Hwang
authors: Hoseop
authors: H
authors: Yun
authors: Junghwan
authors: J
authors: Do
authors: Allan J
authors: AJ
authors: Jacobson
mesh_terms: D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008958:Models, Molecular; D013055:Spectrophotometry, Infrared; D013691:Tellurium / Q000737:chemistry*; D017968:Vanadium Compounds / Q000737:chemistry*
chemical_list: D017968:Vanadium Compounds; C026660:tellurous acid; D013691:Tellurium