Journal of Molecular Structure p. 101 - 106 (2004)
Update date:2022-08-25
Topics:
Damodharan, Lakshminarasimhan
Pattabhi, Vasantha
Behera, Manoranjan
Kotha, Sambasivarao
The title compounds, C15H14NO3S 2 (I) and C15H15Br2NO 3S2 (II), are derivatives of Aib (α-aminoisobutyric acid) with thiophene rings substituted at the Cα position. The Cα substitution causes the backbone to assume an extended conformation in the crystal structure. N-H and C-H donors share the thiophene ring π system for X-H?π interactions. The packings of the molecules are stabilized by intermolecular N-H?O, C-H?O, C-H?π and C-H?Br hydrogen bonds. Br?O interactions and a weak dihydrogen bond have also been observed in the crystal structure of II. The packing adopted by II has maximized the number of interactions that are possible.
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