Bis(μ-1,4-dihydropyridin-4-one-κ ² <i>O</i> : <i>O</i> )di-μ-perchlorato-κ ⁴ <i>O</i> : <i>O</i> ′-bis[aqua(1,4-dihydropyridin-4-one-κ <i>O</i> )copper(II)] tetraaquabis(1,4-dihydropyridin-4-one-κ <i>O</i> )copper(II) tetrakis(p

coordination mode. The dimeric component exhibits both bridging 4-pyridone and perchlorate ligands. Both complexes and the 4-pyridone mol-ecules are bound together by a network of classical hydrogen bonds. The non-coordinating perchlorate ions were modeled as three-site disordered and one of the coordinating 4-pyridone mol-ecules was modeled as two-site disordered.