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The title compounds, (I) and (II), are dispiro-indole-pyrrolidine-benzothiophene derivatives, with (II) having a chlorine substituent on the oxoindole unit. As a result, the conformation of the two molecules differs in the angle of inclination of the indole moiety with respect to the benzothiophene ring system, with a dihedral angle of 71.59 (5) in (I) and 82.27 (7)° in (II).
research communications
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In two benzo[4,5]imidazo[2,1-c][1,4]oxazepine-4-carboxylates, the seven-membered oxazepane rings both have a twist-chair conformation. The dihedral angle between the phenyl ring and the benzimidazole ring system is significantly smaller in one of the compounds, viz. 73.42 (10) compared to 83.07 (17)°.