Abstract
AbstractThree new organically templated polyoxomolybdates with selenite anions as capping groups have been synthesized by hydrothermal reactions and structurally characterized. The structure of {Hbipy}3{KMo4O13(SeO3)} (1; bipy = 4,4′‐bipyridine) features a 1D anionic double chain of {KMo4O13(SeO3)}3− units. Four MoVIO6 octahedra in compound 1 form a planar Mo4O13 cluster unit through corner‐, edge‐ and face‐sharing. The Mo4O13 cluster unit is further capped by an SeIVO3 group in a bidentate fashion. These monocapped cluster units are further interconnected by bridging K+ cations into a 1D double chain. Both {H2bipy}2{Mo5O15(SeO3)2}·H2O (2) and {H2pip}2{Mo5O15(SeO3)2}·3H2O (3; pip = piperazine) contain a bicapped Mo5O15 cluster unit in which five MoVIO6 octahedra form a planar Mo5O15 cluster unit through edge‐ and corner‐sharing, with the two SeIVO3 anions as tridentate capping groups on the two open sides of the cluster unit to form an {Mo5O15(SeO3)2}4− anion. The {Mo5O15(SeO3)2}4− cluster anions in compounds 2 and 3 are further inter‐linked by the organic templates through hydrogen bonds to form a 2D layer. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)
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