Browsing by Author "Haribabu. J"

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    Crystal structure of (2E)-N-methyl-2-[(4-oxo-4H-chromen-3-yl)methylidene]hydrazinecarbothioamide
    (International Union of Crystallography, 2014-10-08) Vimala, G; Govindaraj, J; Haribabu. J; Karvembu, R; Subbiahpandi, A
    In the title compound, C12H11N3O2S, the dihedral angle between the 4H-chromen-4-one ring system and the -CH=N - NH - CS - NH- unit is 6.22 (1)°. In the crystal, inversion dimers linked by pairs of N - H⋯O hydrogen bonds generate R 2/2(14) loops. The dimers are reinforced by a pair of C - H⋯O interactions, which generate R 2/2(10) loops.
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    Crystal structure of N-[(naphthalen-1-yl)- carbamothioyl]cyclohexanecarboxamide
    (International Union of Crystallography, 2015-06-27) Vimala. G; Haribabu. J; Aishwarya. S; Karvembu. R; SubbiahPandi. A
    The title compound, C18H20N2OS, displays whole-molecule disorder over two adjacent sets of sites with an occupancy ratio of 0.630 (11):0.370 (11). In each disorder component, the cyclohexyl ring shows a chair conformation with the exocyclic C-C bond in an equatorial orientation. The dihedral angles between the cyclohexyl ring (all atoms) and the naphthyl ring system are 36.9 (6) for the major component and 20.7 (12)° for the minor component. Each component features an intramolecular N-H⋯O hydrogen bond, which closes an S(5) ring. In the crystal, inversion dimers linked by pairs of N-H⋯S hydrogen bonds generate R22(8) loops for both components. Aromatic π-π stacking interactions [shortest centroid-centroid separation = 3.593 (9) Å] and a C-H⋯π interaction are also observed.