Synthesis and Crystal Structure of a Novel Tetravanadate Modified by Chiral Racemoid Zirconium Complex

1 INTRODUCTION Polyoxometalate anions are a broad class of dis- crete metal-oxide compounds MxOyn–, which are of both fundamental and practical interest in a range of areas, including catalysis, biochemistry, medicine and solid state devices1~6]. Recently, the structural chemistry of vanadium oxides in combination with secondary metal-ligand cations has attracted much attention7~17]. These hybrid materials manifest the structural influences both of coordination preferen- ces of the sec…

Synthesis and Crystal Structure of a Novel Tetravanadate Modified by Chiral Racemoid Zirconium Complex

Zr(phen)4(H2O)4O2(V4O12)](phen)2 1 (phen = 1,10-phenanthroline) was synthesized under hydrothermal condition. The crystal of 1 belongs to triclinic, space group P(1) with a =10.6334(8), b = 11.9201(8), c = 14.6505(10) (A), α = 69.9980(10),β = 84.9240(10), γ = 84.1300(10)°,V = 1733.0(2) (A)3, Z = 1, Mr = 1672.27, Dc = 1.602 g/cm3, C72H56N12O18V4Zr, F(000) = 848,μ(MoKα) = 0.747 mm-1, S = 0.957, R = 0.0504 and wR = 0.1178 for 4011 observed reflections (I ＞2σ(I)). The crystal structure of 1 could be discussed in terms of {Zr(phen)2(H2O)2O2}, un-coordinated 1,10-phenanthroline molecules and { V4O12 } unit. In { Zr(phen)2(H2O)2O2 }, the coordination geometry of zirconium is a dodecahedron, but {V4O12} unit is constructed from four apex-sharing {VO4} tetrahedra. Furthermore, {V4O12} links with two {Zr(phen)2(H2O)2O2} units via two bridging oxygen atoms. Interestingly, the two {Zr(phen)2(H2O)2O2} units display D- and L-enantiomers, respectively, upon which the whole molecule represents a racemoid configuration.