Manzoor Iqbal Khattak

Publications (4)0.69 Total impact

• Article: 2-(3,4-Dimethyl-5,5-dioxo-2H,4H-pyrazolo[4,3-c][1,2]benzothiazin-2-yl)-N′-(3-methoxybenzylidene)acetohydrazide dimethylformamide hemisolvate

  Ahmad Matloob, Hamid Latif Siddiqui, Manzoor Iqbal Khattak, Ahmad Saeed, Parvez Masood
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  ABSTRACT: In the title compound, C21H21N5O4S·0.5C3H7NO, the heterocyclic thiazine ring adopts a half-chair conformation, with the S and N atoms displaced by −0.451 (5) and 0.233 (5) Å, respectively, from the plane formed by the remaining ring atoms. The asymmetric unit contains a disordered half-molecule of solvent lying close to inversion centers. The crystal structure is stabilized by weak intermolecular N—H...O and C—H...O interactions.
  Acta Crystallographica Section E. 01/2011;
• Article: N′-(2-Chlorobenzylidene)-2-(3,4-dimethyl-5,5-dioxo-2H,4H-pyrazolo[4,3-c][1,2]benzothiazin-2-yl)acetohydrazide

  Ahmad Matloob, Hamid Latif Siddiqui, Manzoor Iqbal Khattak, Ahmad Saeed, Parvez Masood
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  ABSTRACT: The asymmetric unit of the title compound, C20H18ClN5O3S, contains two independent molecules with significantly different conformations of the heterocyclic thiazine rings. In both molecules, the thiazine rings adopt half-chair conformations, with the S atoms displaced by 0.382 (3) and 0.533 (3) Å and N atoms −0.351 and −0.275 Å, respectively, from the planes formed by the remaining ring atoms. The crystal structure is stabilized by weak intermolecular N—H...O and C—H...O interactions.
  Acta Crystallographica Section E. 01/2011;
• Source

  Available from: PubMed Central

  Article: N'-(2-Chloro-benzyl-idene)-2-(3,4-dimethyl-5,5-dioxo-2H,4H-pyrazolo-[4,3-c][1,2]benzothia-zin-2-yl)acetohydrazide.

  Matloob Ahmad, Hamid Latif Siddiqui, Manzoor Iqbal Khattak, Saeed Ahmad, Masood Parvez
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  ABSTRACT: The asymmetric unit of the title compound, C(20)H(18)ClN(5)O(3)S, contains two independent mol-ecules with significantly different conformations of the heterocyclic thia-zine rings. In both mol-ecules, the thia-zine rings adopt half-chair conformations, with the S atoms displaced by 0.382 (3) and 0.533 (3) Å and N atoms -0.351 and -0.275 Å, respectively, from the planes formed by the remaining ring atoms. The crystal structure is stabilized by weak inter-molecular N-H⋯O and C-H⋯O inter-actions.
  Acta Crystallographica Section E Structure Reports Online 01/2010; 67(Pt 1):o218-9. · 0.35 Impact Factor
• Source

  Available from: PubMed Central

  Article: 2-(3,4-Dimethyl-5,5-dioxo-2H,4H-pyrazolo-[4,3-c][1,2]benzothia-zin-2-yl)-N'-(3-meth-oxy-benzyl-idene)aceto-hydrazide dimethyl-formamide hemisolvate.

  Matloob Ahmad, Hamid Latif Siddiqui, Manzoor Iqbal Khattak, Saeed Ahmad, Masood Parvez
  [show abstract] [hide abstract]
  ABSTRACT: In the title compound, C(21)H(21)N(5)O(4)S·0.5C(3)H(7)NO, the heterocyclic thia-zine ring adopts a half-chair conformation, with the S and N atoms displaced by -0.451 (5) and 0.233 (5) Å, respectively, from the plane formed by the remaining ring atoms. The asymmetric unit contains a disordered half-mol-ecule of solvent lying close to inversion centers. The crystal structure is stabilized by weak inter-molecular N-H⋯O and C-H⋯O inter-actions.
  Acta Crystallographica Section E Structure Reports Online 01/2010; 67(Pt 1):o216-7. · 0.35 Impact Factor