Diaqua­[methyl 4-O-benzyl-2,3,6-tri-O-(2-picol­yl)-α-D-mannopyran­oside]­cobalt(II) bis­(perchlorate) monohydrate: partial coordination of a ligand derived from D-mannose

The title compound, [Co(C₃₂H₃₅N₃O₆)(H₂O)₂](ClO₄)₂·H₂O, contains a cationic complex with a novel facultative hexa­dentate sugar-derived ligand coordinated in a tetra­dentate fashion to give a CoN₂O₄ coordination. The partial coordination is imposed by the rigid conformation of the sugar. The pyridine group that is not bound to the metal is free to participate in inter­molecular hydrogen bonding and π–π stacking inter­actions.