Abstract
In the title compound, C27H21ClN2O4, the mean planes of the two indole ring systems (r.m.s. deviations = 0.021 and 0.024 Å) are approximately perpendicular to one another, with a dihedral angle of 79.54 (12)°. The benzene ring is twisted with respect to the mean planes of the two indole ring systems at angles of 80.14 (15) and 86.30 (15)°. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds, forming inversion dimers with an R (2) 2(18) ring motif. The dimers are linked by a further N-H⋯O hydrogen bond, forming chains along [100]. There are intra- and inter-molecular C-H⋯π inter-actions present, the latter linking the chains to form a three-dimensional supra-molecular structure.
Highlights
In the title compound, C27H21ClN2O4, the mean planes of the two indole ring systems (r.m.s. deviations = 0.021 and 0.024 Å) are approximately perpendicular to one another, with a dihedral angle of 79.54 (12)
The benzene ring is twisted with respect to the mean planes of the two indole ring systems at angles of
Molecules are linked by N—H O
Summary
Indole derivatives are found abundantly in a variety of natural plants and exhibit various physiological properties (Poter et al, 1977; Sundberg, 1996). Bis-indolymethane derivatives have been found to be potentially bioactive compounds (Chang et al, 1999; Ge et al, 1999). The synthesis and applications of bis-indolymethane derivatives have been studied widely. The title compound is one of the bis-indolymethane derivatives used as a precursor for MRI contrast agents (Ni, 2008). We report on its synthesis and crystal structure. Similar structures are reported by Sun et al (2012, 2013)
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