title: Crystal structures of (E)-4-[1-(2-carbamo-thio-yl-hydrazinyl-idene)eth-yl]phenyl acetate and (E)-4-[1-(2-carbamo-thio-ylhydrazinyl-idene)eth-yl]phenyl benzoate.
abstract: In the title compounds, C11H13N3O2S, (I), and C16H15N3O2S, (II), the thio-semicarbazone group adopts an extended conformation. The acetate ester (I) crystallizes with two independent mol-ecules in the asymmetric unit. In the benzoate ester (II), the planes of the two aryl rings are inclined to one another by 46.70 (7)°. In both compounds, there is a short intra-molecular N-H⋯N contact present, forming anS(5) ring motif. In the crystals of both compounds, mol-ecules are linkedviapairs of N-H⋯S hydrogen bonds, forming dimers withR22(8) ring motifs. The dimers are linked by N-H⋯S and N-H⋯O hydrogen bonds, forming slabs parallel to (01-1). In (I), there are N-H⋯π and C-H⋯π inter-actions present within the slabs, while in (II), there are only N-H⋯π inter-actions present.
authors.affiliation: Centre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: Vijayan
authors.initials: V
authors.lastname: Viswanathan
authors.affiliation: Department of Chemistry, Asthagiri Herbal Research Foundation, Perungudi Industrial Estate, Perungudi, Chennai 600 096, India.
authors.forename: Mani Karthik
authors.initials: MK
authors.lastname: Ananth
authors.affiliation: Department of Chemistry, Asthagiri Herbal Research Foundation, Perungudi Industrial Estate, Perungudi, Chennai 600 096, India.
authors.forename: S
authors.initials: S
authors.lastname: Narasimhan
authors.affiliation: Centre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India.
authors.forename: Devadasan
authors.initials: D
authors.lastname: Velmurugan
keywords: N—H⋯S and N—H⋯O hydrogen bonds; N—H⋯π and C—H⋯π inter­actions; carbamo­thio­ylhydrazono; crystal structure; hydrogen bonding; thio­semicarbazone