ic402668v_si_001.pdf (975.95 kB)
Cyclic Tungstoselenites Based on {Se2W12} Units
journal contribution
posted on 2014-02-17, 00:00 authored by Irina V. Kalinina, Eugenia
V. Peresypkina, Natalya
V. Izarova, Fiona M. Nkala, Ulrich Kortz, Nikolay
B. Kompankov, Nikolay K. Moroz, Maxim N. SokolovThe 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.