In the title compound, C(11)H(15)ClNO(+)·C(15)H(13)O(2) (-), the piperidinium ring adopts a chair conformation. In the crystal, cations and anions are connected by inter-molecular O-H⋯O and N-H⋯O hydrogen bonds, forming two-dimensional networks parallel to the bc plane. Furthermore, the crystal structure is stabilized by weak C-H⋯π inter-actions.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3152132PMC
http://dx.doi.org/10.1107/S1600536811023051DOI Listing

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In the title compound, C(11)H(15)ClNO(+)·C(15)H(13)O(2) (-), the piperidinium ring adopts a chair conformation. In the crystal, cations and anions are connected by inter-molecular O-H⋯O and N-H⋯O hydrogen bonds, forming two-dimensional networks parallel to the bc plane. Furthermore, the crystal structure is stabilized by weak C-H⋯π inter-actions.

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In the title salt, C(11)H(15)ClNO(+)·C(7)H(5)O(2) (-), the dihedral angle between the mean planes of the chloro-phenyl ring of the cation and the benzene ring of the anion is 74.4 (1)°. In the cation, the six-membered piperazine ring adopts a chair conformation.

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In the cation of the title compound, C(11)H(15)ClNO(+)·C(4)H(3)O(4) (-)·C(4)H(4)O(4), the dihedral angle between the mean planes of the chlorine-substituted aromatic ring and the 4-hy-droxy-piperidinium ring (C-C-C-C-C-N) is 61.9 (8)°. Intra-molecular O-H⋯O and inter-molecular O-H⋯O and N-H⋯O hydrogen bonding, as well as weak π-stacking inter-actions [centroid-centroid distance = 3.

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