Copper(II) and cadmium(II) complexes of 2-pyridinyl-4-pyridinylmethanone: Supramolecular architectures consolidated by hydrogen bonding and π–π interaction

2-Pyridinyl-4-pyridinylmethanone (L) has been shown to behave as a monodentate ligand via its 4-pyridyl ring in three new metal(II) complexes, all of which exhibit supramolecular architectures assembled through weak interactions including hydrogen bonding and π–π stacking. Effects of the inorganic anions on the structure of the Cd(II) complexes of L are also discussed.