Synthesis and Crystal Structure of K3[HO{VO(O2)2}2] H2O

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The title compound K3[HO{VO(O2)2}2]·H2O has been synthesized and its crystal structure was determined by X-ray diffraction method. The crystal is of monoclinic, space group P21/c with a = 6.7078(3), b = 9.9539(6), c = 15.8182(9)A, β = 93.702(3)0, V = 1053.96(10)A3, Mr = 414.20, Dc = 2.610 g/cm3, Z = 4, λ(MoKα) = 0.71073A, F(000) = 808, μ = 3.014 mm-1, the final R = 0.0173 and wR = 0.0466 for 2178 observed reflections with I > 2σ(I). X-ray diffraction reveals that the coordination polyhedra of V atoms are not chemically equivalent: the V(1) and V(2) polyhedra can be described as pentagonal pyramid and pentagonal bipyramid, respectively.
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