Asymmetric dinuclear hydroxyl and ethoxyl citrato dioxovanadates(V)

Abstract

Asymmetric citrato dioxovanadates(V), [Hneo](4)[V2O4(R-Hcit)(OH)][V2O4(S-Hcit)(OH)] center dot 4H(2)O (1) and [Ni(phen)(3)](2)[V2O4(R-Hcit)(OC2H5)][V2O4(S- Hcit)(OC2H5)] center dot 4H(2)O (2) and (H(4)cit citric acid, neo 2,9-dimethyl-1,10-phenanthroline, phen 1,10-phenanthroline) are isolated with the help of large counterions. Structural analyses of complexes 1 and 2 show that vanadium atoms are coordinated by tridentate citrate ligand and hydroxy or ethoxy groups, respectively. The insertions of hydroxy and ethoxy groups give new examples of the mixed RO-bridges for vanadium-citrate complexes.