(1R,3R,3aS,8aR)-4-Oxo-3-phenyl-1-[(1R)-1-phenyl­eth­yl]deca­hydro­cyclo­hepta­[b]pyrrol-1-ium bromide

The title chiral compound, C₂₃H₂₈NO⁺·Br⁻, was obtained from an optically active amino­ethanol precursor. The pyrrolidine heterocycle has an envelope conformation, with the C atom α-positioned with respect to the keto group deviating by 0.570 (6) Å from the mean plane of other atoms. The trans-fused seven-membered ring adopts a pseudo-chair conformation. The two phenyl rings form a dihedral angle of 85.1 (2)°. The cationic center and the bromide anion are connected through an N—H...Br hydrogen bond.