title: Sandwich-type zinc-containing polyoxometalates with a hexaprismane core [{Zn2W(O)O3}2]4+ synthesized by thermally induced isomerization of a metastable polyoxometalate.
abstract: Two novel sandwich-type silicotungstates, TBA(8)[{Zn(2)W(O)O(3)}(2)H(4){α-SiW(9)O(33)}(2)]·5H(2)O (α-Zn4; TBA = tetra-n-butylammonium) and TBA(8)[{Zn(2)W(O)O(3)}(2)H(4){β-SiW(9)O(33)}(2)]·7H(2)O (β-Zn4), were synthesized by the solid-state thermally induced isomerization of metastable TBA(8)[{Zn(OH(2))(μ(3)-OH)}(2){Zn(OH(2))(2)}(2){γ-HSiW(10)O(36)}(2)]·9H(2)O (γ-Zn4). Compounds α-Zn4 and β-Zn4 consisted of two [SiW(9)O(33)](8-) subunits sandwiching the unprecedented distorted hexaprismane core [{Zn(2)W(O)O(3)}(2)](4+).
authors: Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
authors: Yuji
authors: Y
authors: Kikukawa
authors: Kazuya
authors: K
authors: Yamaguchi
authors: Noritaka
authors: N
authors: Mizuno
mesh_terms: D007536:Isomerism; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D010084:Oxidation-Reduction; D013696:Temperature; D017973:Tungsten Compounds / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*; D000099294:Polyoxometalates
chemical_list: D009942:Organometallic Compounds; D017973:Tungsten Compounds; D015032:Zinc; C102296:polyoxometalate I; D000099294:Polyoxometalates