The solvatothermal synthesis and the crystal structure of polymeric N-methylpyridinium octamolybdate(VI), (Me–NC5H5)4n[Mo8O26]n

The reaction of (PyH)2[MoOCl5] with pyridine and methanol in the presence of CoCl2·6H2O and H2C2O4·2H2O at 130 °C under solvatothermal conditions afforded (Me–NC5H5)4n[Mo8O26]n 1. The structure consists of infinite molybdenum oxide chains bearing a negative charge and N-methylpyridinium cations. Eight {MoO6} octahedra are arranged in an edge-sharing manner to form compact octamolybdate subunits which are connected through pairs of Mo–O–Mo bridges into extended one-dimensional arrays.