Browsing by Author "Subbiahpandi, A"

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    Crystal structure of (2E)-N-methyl-2-(2-oxo-1,2-dihydroacenaphthylen-1-ylidene)hydrazinecarbothioamide
    (International Union of Crystallography, 2014-10-24) Vimala, G; Govindaraj, J; Haribabu, J; Karvembu, R; Subbiahpandi, A
    In the title compound, C14H11N3OS, the acenaphthylene ring system and hydrazinecarbothioamide unit (=N - NH - C=S - NH-) are essentially coplanar [with maximum deviations from their mean planes of -0.009 (2) and 0.033 (2) Å, respectively], and make a dihedral angle of 1.59 (9)°. The molecular conformation is stabilized by two weak intramolecular hydrogen bonds (N - H⋯O and N - H⋯N), which generate S(6) and S(5) ring motifs. In the crystal, molecules are linked by N - H⋯S hydrogen bonds, forming chains along [010]. The chains are linked via pairs of C - H⋯O hydrogen bonds, enclosing R 2 2(10) ring motifs, and C - H⋯π interactions, forming a three-dimensional framework. The absolute structure of the title compound was determined by resonant scattering.
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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.