A Barium Vanadium(V) Selenite Hydrate, Ba(VO2)2(SeO3)2·H2O: A Novel 3D Polymer of Cross-Linked Sheets with Embedded ···V–O–V··· 21 Helices

Abstract

The characterisation, by a single-crystal X-ray study at ,150 K, of brown acicular crystals of barium(II) bis(dioxovanadium(V)) bis(selenite(IV)) monohydrate, BaSe 2 V 2 O 10 ÁH 2 O, obtained as a minor product of the synthesis of the previously reported 'Ba(VO) 2 (SeO 3 ) 2 (HSeO 3 ) 2 ', is recorded. Crystals are monoclinic, P2 1 /c, a ¼ 10.803 (2)(3) Å 3 , 2456 independent diffractometer reflections refining to R1 ¼ 0.032, wR2 ¼ 0.084. A single BaV 2 Se 2 O 11 H 2 formula unit, devoid of crystallographic symmetry, comprises the asymmetric unit of the structure, which is a three-dimensional polymer, with component sheets parallel to the crystallographic b axis, containing pentavalent vanadium atoms, one five-, the other six-coordinate, linked by selenite pyramids.

[NaCl][Cu(HSeO3)2], NaCl-intercalated Cu(HSeO3)2: synthesis, crystal structure and comparison with related compounds

“…Transition metal selenites have been the focus of a number of recent studies due to their interesting physical properties, arising in part due to the interplay between the stereochemical activity of lone pairs of electrons on the Se 4+ cations and electronic properties of transition metal cations [1][2][3][4][5][6][7][8][9]. The interest has also been stimulated by the attempts to understand purely fundamental reasons for structural diversity in selenites and its underlying crystal chemical mechanisms [10][11][12].…”

International Year of Crystallography

“…Within the realm of chemistry, this includes papers by Allan White and Francis Lincoln on barium vanadium(V) selenite hydrate, [1] and Peter Junk and Glen Deacon on rareearth peroxide complexes. [2] Thomas Mak examines the structures of a series of organosilver complexes, [3] while Jonathan White uses crystallography to probe the p-electron donor characteristics of the ethynyl group.…”