title: Crystal structure of (E)-N'-(4-chloro-benzyl-idene)-4-methyl-benzene-sulfono-hydrazide: a hexa-gonal polymorph.
abstract: The title compound, C14H13ClN2O2S, crystallized in the enanti-omorphic defining hexa-gonal space group P61 [Flack parameter = -0.02 (7)]. The partially hydrated form of the same compound, crystallizing in the triclinic space group P-1, has been reported previously [Kia et al. (2009b). Acta Cryst. E65, o1119], as has the crystal structure of the bromo derivative, also crystallizing in the space group P-1 [Kia et al. (2009a). Acta Cryst. E65, o821]. The title mol-ecule is non-planar with the planes of the benzene rings being inclined to one another by 76.62 (13)°, and has an E conformation about the C=N bond. In the crystal, mol-ecules are linked via N-H⋯O hydrogen bonds forming 61 helical chains running along [001]. The chains are linked via C-H⋯O hydrogen bonds, C-H⋯π inter-actions and short Cl⋯O [3.015 (3) Å] inter-actions, forming a three-dimensional structure.
authors.affiliation: Department of Physics, University College of Engineering Panruti, Tamil Nadu 607 106, India.
authors.forename: J
authors.initials: J
authors.lastname: Balaji
authors.affiliation: Department of Chemistry, University College of Engineering Panruti, Tamil Nadu 607 106, India.
authors.forename: J
authors.initials: J
authors.lastname: John Francis Xavier
authors.affiliation: Department of Physics, University College of Engineering Panruti, Tamil Nadu 607 106, India.
authors.forename: S
authors.initials: S
authors.lastname: Prabu
authors.affiliation: Department of Physics, University College of Engineering Panruti, Tamil Nadu 607 106, India.
authors.forename: P
authors.initials: P
authors.lastname: Srinivasan
keywords: Schiff base; crystal structure; helical chains; hydrazones; hydrogen bonding.; sulfono­hydrazide