M. Krishna Kumar

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In the title 1:1 adduct, C6H7N·C7H7NO2, the carb-oxy-lic acid group is twisted at an angle of 4.32 (18)° with respect to the attached benzene ring. In the crystal, the carb-oxy-lic acid group is linked to the pyridine ring by an O-H⋯N hydrogen bond, forming a dimer. The dimers are linked by N-H⋯O hydrogen bonds, generating (010) sheets.
In the crystal of the title mol-ecular salt, C6H7BrN(+)·C7H7O3S(-), the anions and cations are linked via N-H⋯O hydrogen bonds forming layers, enclosing R 2 (2)(4) ring motifs, lying parallel to (001). Within the layers there are short O⋯O contacts of 2.843 (2) Å.
In the title mol-ecular salt, C18H22NO(+)·C7H7O3S(-), the dihedral angle between the aromatic rings in the cation is 10.00 (9)°; its alkyl side chain adopts an extended conformation. In the crystal, weak C-H⋯O and π-π [centroid-centroid distance = 3.7658 (17) Å] inter-actions link the components, generating a three-dimensional network.
In the title compound, CH5N2O(+)·C7H5O6S(-), the dihedral angle between the benzene ring and the mean plane of the uronium cation is 76.02 (8)°. The carboxyl group in the anion is twisted by 1.47 (9)° from the benzene ring. In the crystal, the cation is linked to the anion by weak O-H⋯O and N-H⋯O hydrogen bonds and π-π inter-actions [centroid-centroid(More)
In the title hydrated salt, C6H7N2O2 (+)·C7H5O6S(-)·H2O, the benzene ring of the cation makes a dihedral angle of 1.32 (19)° with the attached nitro group. In the anion, an intra-molecular O-H⋯O hydrogen bond with an S(6) ring motif is formed between the carb-oxyl and hy-droxy groups; the dihedral angle between the carb-oxyl group and the benzene ring is(More)
In the cation of the title compound, C14H13BrN(+)·C7H7O3S(-), the dihedral angle between the benzene and pyridine rings is 8.34 (11)°. The Br atom is disordered over two positions with site occupancies of 0.74 (2) and 0.26 (2). The mol-ecular structure is stabilized by a weak intra-molecular C-H⋯O inter-actions. The crystal structure exhibits weak C-H⋯O and(More)
In the title compound, C13H13NO3·H2O, the dihedral angle between the ethyl ester group [C-C-O-C(=O); maximum deviation = 0.003 (2) Å] and the quinoline ring system is 7.94 (12)°. The water solvent mol-ecule is linked to the title mol-ecule via O-H⋯O and O-H⋯N hydrogen bonds. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds, forming chains(More)
The title compound, C(22)H(23)BrN(4)O(3)S(2), crystallizes with two mol-ecules, A and B, in the asymmetric unit. In one of these, the meth-oxy group is disordered over two sets of sites in a 0.565 (9):0.435 (9) ratio. The benzene rings bridged by the sulfonamide group are tilted relative to each other by 37.4 (1) and 56.1 (1)° in mol-ecules A and B,(More)
In the title compound, C(25)H(29)BrN(4)O(3)S(2), the benzene rings bridged by the sulfonamide group are tilted relative to each other by 63.9 (1)° and the dihedral angle between the sulfur-bridged pyrimidine and benzene rings is 64.9 (1)°. The mol-ecular conformation is stabilized by a weak intra-molecular π-π stacking inter-action between the pyrimidine(More)
In the title compound, C(22)H(23)BrN(4)O(4)S(2), the benzene rings bridged by the sulfonamide group are tilted relative to each other by 68.9 (1)° and the dihedral angle between the sulfur-bridged pyrimidine and benzene rings is 69.7 (1)°. The mol-ecular conformation is stabilized by a weak intra-molecular π-π stacking inter-action between the pyrimidine(More)