Bismuth(III)‐Containing Heteropolytungstates [Bi(XW11O39)2]n– (X = Si, Ge, n = 13; X = P, n = 11) and [Bi(P2W17O61)2]17

• Published in: European journal of inorganic chemistry Vol. 2019; no. 3-4; pp. 363 - 366
• Main Authors: Ncube, Nickolet, Bhattacharya, Saurav, Thiam, Diarra, Goura, Joydeb, Mougharbel, Ali S., Kortz, Ulrich
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 31.01.2019
• Subjects: Aqueous solutions; Bismuth; Germanium; Inorganic chemistry; NMR spectroscopy; Polyelectrolytes; Polyoxometalates; Silicon; Structural analysis; Structure elucidation; Tungsten
• ISSN: 1434-1948; 1099-0682
• DOI: 10.1002/ejic.201801391

We report on the synthesis and structural characterization of four bismuth(III)‐containing sandwich‐type heteropolytungstates with Bi in 8‐coordination. The three isostructural Keggin‐type ions [Bi(α‐XW11O39)2]n– {X = Si (1), Ge (2), n = 13; X = P (3), n = 11} and the Wells–Dawson‐type ion [Bi(α2‐P2W17O61)2]17– (4) were prepared via simple one‐pot synthetic procedures in aqueous medium. The novel polyanions comprise a Bi3+ ion linking two monolacunary {XW11} or {X2W17} units in a sandwich‐type fashion. The Bi3+ ion is coordinated by four oxygens of each monolacunary POM unit, resulting in 8‐coordination with square‐antiprismatic geometry. Such a coordination mode is rare for Bi3+. We demonstrate that bismuth(III) can link two monolacunary Keggin‐ and Dawson‐type heteropolytungstates resulting in sandwich‐type structures with 8‐coordinated bismuth(III) in square‐antiprismatic coordination geometry. The four novel polyanions were characterized in the solid state and in solution.