Crystal structure of the adduct (4-chloro­phen­yl)(4-hy­droxy­piperidin-1-yl)methanone–(4-chloro­phen­yl)(piperidin-1-yl)methanone (0.75/0.25)

In the title compound, 0.75C(12)H(14)ClNO(2)·0.25C(12)H(14)ClNO, which is an adduct comprising 0.75 4-hy­droxy­piperidin-1-yl or 0.25 4-piperidin-1-yl substituents on a common (4-chloro­phen­yl)methanone component; the dihedral angles between the benzene ring and the two piperidine rings are 51.6 (3) and 89.5 (7)°, respectively. The hy­droxy­piperidine ring is in a bis­ectional oriention (bi) with the phenyl ring. In the crystal, inter­molecular O—H⋯O hydrogen bonds between the hy­droxy­piperidine group and the keto O atom lead to the formation of chains extending along the c- axis direction.