Cyclic
Tungstoselenites Based on {Se2W12} Units

Kalinina, Irina V.; Peresypkina, Eugenia
V.; Izarova, Natalya
V.; Nkala, Fiona M.; Kortz, Ulrich; Kompankov, Nikolay
B.; Moroz, Nikolay K.; Sokolov, Maxim N.

doi:10.1021/ic402668v.s001

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. Sokolov

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.