AbstractThe infrared spectra in several media and the crystal structure of 3‐methyl‐2,4‐diphenyl‐3‐azabicyclo[3.3.1]‐nonan‐9β‐ol (I) (Scheme I) have been determined, in order to complete the structural study described for the title compound from the1H and13C nmr data [1]. The bicyclic system adopts a flattened chair‐chair conformation in which the cyclohexane ring is more flattened. The methyl and phenyl groups are in equatorial positions and the OH group in an axial position with respect to t