(3R*,4R*)‐3‐Iso­propyl‐4‐phenyl­azetidin‐2‐one at 150 K

The title compound, C₁₂H₁₅NO, crystallized in the centrosymmetric space group C2/c with one mol­ecule as the asymmetric unit. There is a single conventional N—H?O hydrogen bond, with a donor–acceptor distance of 2.912 (1) Å, which forms an R(8) cyclic dimer about a center of symmetry. There is a single significant intermolecular C—H?O interaction, which also forms an R(8) cyclic dimer about a center of symmetry. Taken together, these interactions form chains propagating along [110]. Structural comparisons are made with another β‐­lactam, (1′R*,3R*,4S*)‐3‐(1′‐hydroxy­ethyl)‐4‐phenylazet­id­in‐2‐one.