1,1′-[(5-Hy­droxy­methyl-1,3-phenyl­ene)bis­(methyl­ene)]dipyridin-4(1H)-one monohydrate

The asymmetric unit of the title compound, C(19)H(18)N(2)O(3), comprises a whole organic dipyridinone mol­ecule plus a water mol­ecule of crystallization. The planes of the pyridinone rings are approximately perpendicular with the plane of the central aromatic ring [dihedral angles = 80.68 (8) and 83.65 (8)°]. The C—O bond of the hy­droxy group subtends an angle of 31.71 (10)° with the plane through the central aromatic ring. The crystal packing is mediated by the presence of several O—H⋯O hydrogen-bonding inter­actions and while the water mol­ecules form a C (2) (1)(4) chain parallel to the c axis of the unit cell, the pendant hy­droxy groups are engaged in O—H⋯O=C hydrogen bonds described by a C (1) (1)(12) graph-set motif which runs parallel to the a axis.