Synthesis and Crystal Structure of Protonated Sodium Potassium Dimeric(citrato)dioxovanadium(V)

Abstract

Abstract: The titled complex NaK₃ [VO₂ (Hcit)]₂.7H₂O (H₄cit=citric acid) has been pre-pared and characterized by X-ray diffraction.It crystallizes in monoclinic space group P2₁/n with unit cell parameters:a = 1.1258(2) nm, b=1.5774(3) nm, c=1.6559(1) nm, β=98.568 (9)°and D_c = 1.851 g.cm^-3, Z=4.Each dimer contains a quasi-centrosymmetric planar four-member V₂O₂ ring with two exocyclic citrate entities coordinated by the oxygen atoms of the hydroxy- and a-carboxylate ligand, while the other two β-carboxylate groups remain uncomplexed as its deprotonated and protonated citratovanadate(V).

Key words: Citric acid, Hydroxypolycarboxylic acid, Dioxovanadium(V) complex, Nitrogenase, Crystal structure

TrendMD:

ZHOU Zhao-Hui, MIAO Jian-Ying, WAN Hui-Lin . Synthesis and Crystal Structure of Protonated Sodium Potassium Dimeric(citrato)dioxovanadium(V)[J]. Chem. J. Chinese Universities, 1997, 18(1): 11.

References

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