Tris(2,2′-bipyridine)cobalt(II) μ6-oxido-dodeca-μ2-oxido-hexaoxidohexamolydate(VI)

In the title compound, [Co(C10H8N2)3][Mo6O19], the Co2+ cation is surrounded in a distorted octahedral coordination by six N atoms from three 2,2′-bipyridine ligands. The distribution of Mo—O bond lengths in the Lindqvist isopolyanion is consistent with other structures containing the same unit. In the crystal, the cations and anions are linked by C—H⋯O interactions.

In the title compound, [Co(C 10 H 8 N 2 ) 3 ][Mo 6 O 19 ], the Co 2+ cation is surrounded in a distorted octahedral coordination by six N atoms from three 2,2 0 -bipyridine ligands. The distribution of Mo-O bond lengths in the Lindqvist isopolyanion is consistent with other structures containing the same unit. In the crystal, the cations and anions are linked by C-HÁ Á ÁO interactions.

Comment
There has been extensive interest in heteropolyoxometalates, owing to their fascinating properties and great potential applications in many fields such as, catalysis, material science, medicine, and magnetochemistry (Pope et al., 1991). The organic amines, such as 3-(2-pyridyl)pyrazole and pyrazine, are used to effectively modify heteropolyoxomolybdates under hydrothermal condictions Zhang, Wei, Sun et al., 2009). Here, we describe the synthesis and structural characterization of the title compound.

Refinement
All hydrogen atoms bound to carbon were refined using a riding model with distance C-H = 0.93 Å, U iso = 1.2U eq (C) for aromatic atoms.
supplementary materials sup-2 Figures Fig. 1. The molecular structure of (I) shoiwng displacement ellipsoids drawn at the 30% probability level; H atoms are given as spheres of arbitrary radius.
Crystal data [Co(C 10