Synthesis and crystal structure of [CuCl(phen)2]3H3V10O28 DT 7 H2O

The new compound, [CuCl(phen)2]3H3V10O28 DT 7 H2O, was prepared by reaction of an aqueous KVO3 solution (pH 3) with an aqueous solution of CuSO4 DT 5 H2O in which 1,10-phenanthroline (phen) and KCl were added. The crystal structure of the compound was determined, and the proton position in H3V10O283- were calculated by the bond length/bond number method and also determined from difference electron density map. The protons are bound to colinearly arranged -OV2 and -OV3 groups which is the common protonation type in trihydrogen decavanadates. The structure crystallizes in P1 space group symmetry.