N-Benzyl-3,4-diphenyl-2-azetidinone

The crystal structure of N-benzyl-3,4-diphenyl-2-azetidinone, C₂₂H₁₉NO, shows that the relative configuration of the two chiral centres, C2 and C3, is trans. The N-C and C=O bond lengths in the [beta]-lactam amide group are 1.33 (1) and 1.26 (1)Å, respectively. The N atom is displaced 0.032 (9)Å from the plane of its three attached atoms, i.e. C1 and C3 of the [beta]-lactam ring, and C16 of the benzyl group.

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