Structural and Thermal Studies on the Ion-pairs [Co(NH3)6]5[HV10O28]3·18H2O and [Co(NH3)6][V2O6OH]

Two cobalt hexammine-vanadate ion-pair complexes have been prepared; one in acid medium (pH≈4) and the other in alkaline medium (pH≈10). The formed complexes were characterized by their elemental analysis, IR and XRD techniques. The complexes were subjected to thermogravimetric and differential thermal analyses. The IR study suggests that the formed complexes were of the ion-pair type, while that of the thermally decomposed compounds revealed the resolution of the originally present broad V=O and V-O-V bands. This revised version was published online in July 2006 with corrections to the Cover Date.