Diphenyl (-)-(R)-1-[(S)-Isoleucyl]pyrrolidine-2-phosphonate Hydrochloride

The crystal structure of the title compound, C₂₂H₃₀N₂O₄P⁺.Cl^-, was determined in order to ascertain its absolute configuration. The pyrrolidine ring is markedly flattened and adopts a conformation intermediate between an envelope and a half-chair.

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