The titled complex NaK3[VO2(Hcit)](2) . 7H(2)O(H(4)cit=citric acid) has been prepared and characterized by X-ray diffraction. It crystallizes in monoclinic space group P2(1)/n with unit cell parameters: a=1.125 8(2) nm, b=1.577 4(3) nm, c=1.655 9(1) nm, beta= 98.568 (9)degrees and D-c =1.851 g . cm(-3), Z=4, Each dimer contains a quasi-centrosymmetric cm planar four-member V2O2 ring with two exocyclic citrate entities coordinated by the oxygen atoms of the hydroxy- and alpha-carboxylate ligand, while the other two beta-carboxylate groups remain uncomplexed as its deprotonated and protonated citratovanadate(V)
