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Nikolaev Institute of Inorganic Chemistry

Siberian Branch of Russian Academy of Sciences

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12 сентября 2014 года →  Hot articles

Polyoxomolybdate-supported bismuth trihalogenides

The article of NIIC researchers is published in Inorganic Chemistry (IF = 4.794):

S. A. Adonin, E. V. Peresypkina, M. N. Sokolov, I. V. Korolkov, V. P. Fedin«Polyoxomolybdate-supported bismuth trihalogenides [Mo8O26(BiX3)2]4 (X = Cl, Br, I): syntheses and study of polymorphism»Inorganic Chemistry, 2014, 53 (13), 6886–6892DOI: 10.1021/ic500710t

A reaction of TBA4[Mo8O26] and bismuth(III) halides (TBA = n-tetrabytylammonium, X = Cl, Br and I) yielded TBA4[Mo8O26(BiX3)2]. According to X-ray data, the {BiX3} fragments are coordinated to two oxygen atoms of polyoxomolybdate anion. Thorough structural investigation of single crystals and polycrystalline samples revealed poly- and solvatomorphism of bulk product. For isostructural complexes TBA4[Mo8O26(BiX3)2], X = Cl and Br, an interesting phenomenon was found that crystals keep crystallinity upon loss of solvent. The accompanying structural rearrangements were insvestigated. For X = I, three polymorphic modifications were found. The structural difference between the polymorphs was shown to be caused by conformational flexibility of TBA cations. Interestingly, despite the similar unit cell parameters for one of the polymorphs (X = I) and for the desolvated structures (X = Cl, Br), the polymorphism in the latter case was not found.

Polyoxomolybdate-supported bismuth trihalogenides [Mo8O26(BiX3)2]4− (X = Cl, Br, I): syntheses and study of polymorphism.

Polyoxomolybdate-supported bismuth trihalogenides [Mo8O26(BiX3)2]4 (X = Cl, Br, I): syntheses and study of polymorphism.

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