Structural analysis of 2-iodobenzamide and 2-iodo-N-phenylbenzamide.

The title compounds, 2-iodobenzamide, C7H6INO (I), and 2-iodo-N-phenylbenzamide, C13H10INO (II), were both synthesized from 2-iodobenzoic acid. In the crystal structure of (I), N--H...O and hydrogen bonds form two sets of closed rings, generating dimers and tetramers. These combine with C-- I...Tπ(ring) halogen bonds to form sheets of molecules in the bc plane. For (II), N--H...O hydrogen bonds form chains along the a-axis direction, while inversion-related C--I...π(ring) contacts supported by C--H...π(ring) interactions generate sheets of molecules along the ab diagonal. [ABSTRACT FROM AUTHOR]