Cyclic Tungstoselenites Based on {Se2W12} Units

• Published in: Inorganic chemistry Vol. 53; no. 4; pp. 2076 - 2082
• Main Authors: Kalinina, Irina V, Peresypkina, Eugenia V, Izarova, Natalya V, Nkala, Fiona M, Kortz, Ulrich, Kompankov, Nikolay B, Moroz, Nikolay K, Sokolov, Maxim N
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 17-02-2014
• Subjects: Coordination Complexes - chemical synthesis; Coordination Complexes - chemistry; Crystallography, X-Ray; Cyclization; Magnetic Resonance Spectroscopy; Molecular Structure; Selenious Acid - chemistry; Tungsten - chemistry
• ISSN: 0020-1669; 1520-510X
• DOI: 10.1021/ic402668v

The reaction of Na2WO4 and SeO2 under moderately acidic conditions yielded a novel 39-tungsto-6-selenite, [(Se2W12O46(WO(H2O))3]24– (1), isolated as Na24[H6Se6W39O144]·74H2O. The macrocyclic polyanion consists of three {Se2W12} fragments connected via three trans-{WO(H2O)}4+ groups. The same {Se2W12} building block is present in the structure of [(Se2W12O46)2{Mn2Cl(H2O)2}{Mn(H2O)2}2(SeO)2]13– (2), which was obtained from the same reagents in the presence of MnCl2. The compounds were characterized by single-crystal X-ray diffraction, 77Se NMR, Fourier transform infrared, and Raman spectroscopy.