In the title compound, 0.75C12H14ClNO2·0.25C12H14ClNO, 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.

The crystal structure of the adduct (4-chlorophenyl)(4-hydroxypiperidin-1-yl)methanone-(4-chlorophenyl)(piperidin-1-yl)methanone (0.75/0.25) reveals chains extending along the

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

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