Experimental

R factor = 0.045; wR factor = 0.118; data-to-parameter ratio = 18.8. In the title compound, C26H27ClN2O, the piperidine ring has a chair conformation and all of the ring substituents at Csp3 atoms occupy equatorial positions. The dihedral angle formed between the phenyl rings is 48.11 (9). The chlorobenzene ring occupies a position orthogonal to the methoxy(methyl-idene)amine residue [N—O—C—C torsion angle = 87.90 (15)]. The conformation about the imine C N bond [1.278 (2) Å] is E, and the chloro substituent is anti to the piperidine N atom. Helical supramolecular chains along [010] are sustained by C—H interactions in the crystal packing. Related literature For the biological activity of molecules having a 2,6-diaryl-piperidine core, see: Ramachandran et al. (2011); Ramalingan et al. (2004). For the structure of the bromo derivative, see: Ramalingan et al. (2012). For the synthesis, see: Ramalingan et al. (2006)