2-Methyl-2

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Kengo Hanaya - One of the best experts on this subject based on the ideXlab platform.

Hoongkun Fun - One of the best experts on this subject based on the ideXlab platform.

  • 2 amino 5 methyl pyridinium 2 hy droxy benzoate
    Acta Crystallographica Section E-structure Reports Online, 2010
    Co-Authors: Ching Kheng Quah, Madhukar Hemamalini, Hoongkun Fun
    Abstract:

    In the title compound, C6H9N2+·C7H5O3−, the protonated 2-amino-5-methyl­pyridinium cation and the 2-hy­droxy­benzoate anion are both essentially planar, with maximum deviations of 0.026 (2) and 0.034 (1) A, respectively. The anion is stabilized by an intra­molecular O—H⋯O hydrogen bond, which forms an S(6) ring motif. In the solid state, the anions are linked to the cations via pairs of inter­molecular N—H⋯O hydrogen bonds forming R22(8) ring motifs. The crystal structure is further stabilized by N—H⋯O and C—H⋯O inter­actions which link the mol­ecules into chains along [010]. A π–π stacking inter­action [centroid–centroid-distance = 3.740 (2) A] is also observed.

  • 2 amino 5 methyl pyridinium 2 carb oxy benzoate
    Acta Crystallographica Section E-structure Reports Online, 2010
    Co-Authors: Madhukar Hemamalini, Hoongkun Fun
    Abstract:

    In the title salt, C6H9N2+·C8H5O4−, the hydrogen phthalate anion is essentially planar, with a maximum deviation of 0.011 (2) A. In the crystal structure, the protonated N atom of the pyridine ring and the 2-amino group of the cation are hydrogen bonded to the carboxyl­ate O atoms of the anion via a pair of N—H⋯O hydrogen bonds, forming an R22(8) ring motif. In the hydrogen phthalate anion, there is a very strong, almost symmetric, intra­molecular O—H⋯O hydrogen bond, generating an S(7) motif [O⋯O = 2.382 (3) A]. Furthermore, these two molecular motif rings are connected by a bifurcated N—H⋯(O,O) hydrogen-bonded motif R12(4), forming a supra­molecular ribbon along the b axis. The crystal structure is further stabilized by π–π inter­actions between the cations and anions [centroid–centroid distance = 3.6999 (10) A].

  • 2 amino 4 methyl pyridinium 2 carb oxy benzoate
    Acta Crystallographica Section E-structure Reports Online, 2010
    Co-Authors: Ching Kheng Quah, Madhukar Hemamalini, Hoongkun Fun
    Abstract:

    In the title mol­ecular salt, C6H9N2+·C8H5O4−, the anion is stabilized by an intra­molecular O—H⋯O hydrogen bond, which generates an S(7) ring motif. In the crystal, the cations and anions are linked to form extended chains along [001] by O—H⋯O and N—H⋯O hydrogen bonds. Adjacent chains are crosslinked via C—H⋯O inter­actions into sheets lying parallel to (100).

  • 2 amino 4 methyl pyridinium 2 hy droxy benzoate
    Acta Crystallographica Section E-structure Reports Online, 2010
    Co-Authors: Madhukar Hemamalini, Hoongkun Fun
    Abstract:

    The asymmetric unit of the title mol­ecular salt, C6H9N2+·C7H5O3−, contains two cations and two anions. Both the salicylate anions contain an intra­molecular O—H⋯O hydrogen bond, which generates an S(6) ring. Both the 2-amino-4-methyl­pyridine mol­ecules are protonated at their pyridine N atoms. In the crystal, both cations form two N—H⋯O hydrogen bonds to their adjacent anions, forming ion pairs. Further N—H⋯O links generate sheets lying parallel to the ab plane. In addition, weak C—H⋯O bonds and aromatic π–π stacking inter­actions [centroid–centroid distances = 3.5691 (9) and 3.6215 (9) A] are observed between the cations and anions.

  • methyl 2 acetamido 2 1 acetyl 3 hydr oxy 2 oxoindolin 3 yl propanoate
    Acta Crystallographica Section E-structure Reports Online, 2010
    Co-Authors: Hoongkun Fun, Jia Hao Goh, Yang Liu, Yan Zhang
    Abstract:

    In the title isatin compound, C16H18N2O6, the pyrrolidine ring adopts an envelope conformation and is inclined at a dihedral angle of 7.31 (5)° with respect to the benzene ring. The acetyl group is disordered over two positions with refined occupancies of 0.503 (4) and 0.497 (4). These groups make dihedral angles of 12.6 (6) and 19.6 (7)° with the pyrrolidine ring. In the crystal structure, inter­molecular C—H⋯O hydrogen bonds link neighbouring mol­ecules into infinite chains along the b axis. These chains are further inter­connected by inter­molecular O—H⋯O hydrogen bonds into two-dimensional arrays parallel to the bc plane. Weak inter­molecular C—H⋯π inter­actions further stabilize the crystal structure.

Naoki Natori - One of the best experts on this subject based on the ideXlab platform.

Taeko Izumi - One of the best experts on this subject based on the ideXlab platform.

Nuri Kiraz - One of the best experts on this subject based on the ideXlab platform.