Abstract
The flexible cyclohexene ring of the isoindole moiety, as indicated by the positional disorder of the C5 and C6 atoms, assumes two kinds of half-chair conformation, 4 H 5 or 5 H 4 , at an equilibrium ratio of 68:32. The planar pyrrole ring forms dihedral angles of 76.45 (3) and 86.21 (9) o with the best planes through the 1-p-tolyl and 2-ethyl moieties, respectively. Both moieties occupy a cis position with respect to the pyrrole ring [N2-C1-C12-C13=98.9 (2), C1-N2-C8-C9=82.0 (2) o ]
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