Iron(II) and copper(II) paratungstates B: a single‐crystal X‐ray diffraction study. Issue 11 (16th October 2018)

• Record Type: Journal Article
• Authors: Gumerova, Nadiia I.; Dobrov, Anatolie; Roller, Alexander; Rompel, Annette
• Is Part Of: Acta crystallographica. Volume 74:Issue 11(2018)
• Page Start: 1252
• Page End: 1259
• Publication Date: 2018-10-16
• Subjects: polyoxometalate -- POM -- isopolytungstate -- three‐dimensional structure -- crystal structure -- dodecatungstate -- IPOT; Crystallography -- Periodicals; Crystals -- Periodicals; 548.3
• DOI: 10.1107/S2053229618010021
• Languages: English
• ISSNs: 2053-2296

Abstract

Abstract : Two new isopolytungstates, Na5 Fe2.5 [W12 O40 (OH)2 ]·36H2 O and Na4 Cu3 [W12 O40 (OH)2 ]·28H2 O, have been prepared and structurally characterized. The compounds exhibit a three‐dimensional structure, in which the paratungstate anions coordinate to Fe II or Cu II ions in a polydentate mode. Abstract : Paratungstate B is a common isopolytungstate (IPOT) built of the [W12 O40 (OH)2 ] 10− anion and exhibits a cluster‐like construction of 12 W‐centred distorted octahedra. Due to a high surface charge density, the paratungstate anion acts as a multidentate ligand forming high‐dimensional extended structures, which exhibit unique catalytic and magnetic properties. Two new paradodecatungstate B compounds decorated by iron(II) or copper(II), namely Na5 Fe2.5 [W12 O40 (OH)2 ]·36H2 O (Na5 Fe2.5 paraB ) and Na4 Cu3 [W12 O40 (OH)2 ]·28H2 O (Na4 Cu3 paraB ), have been synthesized by a convenient aqueous solution method, and structurally characterized by single‐crystal and powder X‐ray diffraction, IR spectroscopy, elemental analysis and thermogravimetric analysis. Both compounds crystallize in the triclinic P space group. In both compounds, the [W12 O40 (OH)2 ] 10− polyanion acts as a multidentate ligand that links transition‐metal and sodium cations, forming a three‐dimensional framework.