title: Crystal structure of 2-(2,4-di-chloro-phen-yl)-4-hydroxy-9-phenyl-sulfonyl-9H-carbazole-3-carbaldehyde.
abstract: In the title compound, C25H15Cl2NO4S, the di-chloro-phenyl ring is twisted by 68.69 (11)° from the mean plane of the carbazole ring system [r.m.s. deviation = 0.084 (2)°]. The hy-droxy group is involved in an intra-molecular O-H⋯O hydrogen bond, which generates an S(6) graph-set motif. In the crystal, pairs of C-H⋯Cl hydrogen bonds link mol-ecules into inversion dimers with an R (2) 2(26) motif. Weak C-H⋯O inter-actions further link these dimers into ribbons propagating in [100].
authors.affiliation: Research and Development Centre, Bharathiyar University, India ; Department of Chemistry, Pallavan College of Engineering, Kanchipuram, Tamilnadu, India.
authors.forename: M
authors.initials: M
authors.lastname: Umadevi
authors.affiliation: Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: B M
authors.initials: BM
authors.lastname: Ramalingam
authors.affiliation: Department of Sciences, Chemistry and Materials Research Laboratory, Amrita Vishwa Vidyapeetham University, Ettimadai, Coimbatore 641 112, India.
authors.forename: R
authors.initials: R
authors.lastname: Yamuna
authors.affiliation: Department of Organic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: A K
authors.initials: AK
authors.lastname: Mohanakrishnan
authors.affiliation: Department of Physics, CPCL Polytechnic College, Chennai 600 068, India.
authors.forename: G
authors.initials: G
authors.lastname: Chakkaravarthi
keywords: carbazole derivative; crystal structure; hydrogen bonding