A solution of copper nitrate trihydrate (0.072 g, 0.3 mmol) in aceto­nitrile (5 ml) was added to a solution of 2,6-bis­[(1H-pyra­zol-1-yl)meth­yl]pyridine (0.072 g, 0.3 mmol) in aceto­nitrile (5 ml) in a high-pressure vessel. After sealing the high-pressure vessel, the resulting solution was stirred for three days at 403 K. The precipitate formed was removed by filtration, and the filtrate was washed with aceto­nitrile and di­chloro­methane to get a dark-green powder. Single crystals of the title compound were obtained from its aqueous solution by slow evaporation of the solvent at 333 K within five days.