The structures of cyclohexan [b] indole N-β-propionic acid (1) and cyclooctan [b] indole N-β- propionic acid (2) have been determined by X-ray methods. The conformational populations of their N-β-propionic chains have been determined in solution by 1H nmr analyses. Crystals of 1 are triclinic, space group with a= 12.3562 (4), b= 11.0727 (3), c= 10.2050 (4) Å, α= 108.519 (3), β= 83.941 (3), γ= 104.826 (3)°, and Z= 4. Crystals of 2 are monoclinic, space ...
