Face-to-face interactions of metallic oxo-clusters: Synthesis and crystal structure of new isopolyvanadotungstate salts – Co(H2O)6K2V2W4O19 and [Co(H2O)6]2V2W4O19

Crystals of Co(H2O)6K2V2W4O19 (1) and [Co(H2O)6]2V2W4O19 (2) were obtained from aqueous solution of [V2W4O19]4− and cobalt(II) nitrate. The structure of [V2W4O19]4− is that of the Lindqvist anion in which the two vanadium and four tungsten atoms are statistically distributed over the six metallic positions. The [V2W4O19]4− and the [Co(H2O)6]2+ octahedra are arranged alternately with their faces parallel to each other for maximal interactions (face-to-face interaction). The structure of 1 shows the presence of large mono-directional channels along c-axis with a quasi hexagonal section of 8.52 × 6.35 Å2 which are filled by cobalt. The structure of 2 can be viewed as a pillar arrangement of [Co(H2O)6]2V2W4O19 units along c-axis.

Crystals of Co(H2O)6K2V2W4O19 (1) and [Co(H2O)6]2V2W4O19 (2) were obtained from aqueous solutions of [V2W4O19]4− and cobalt(II) nitrate. The [V2W4O19]4− anions and the [Co(H2O)6]2+ octahedra are arranged alternately with their faces parallel to each other for maximal interactions (face-to-face interaction).Figure optionsDownload as PowerPoint slide