S Samshuddin

Publications (47)16.31 Total impact

• Article: N-(4-Bromo-phen-yl)acetamide: a new polymorph.

  Jerry P Jasinski, Curtis J Guild, H S Yathirajan, B Narayana, S Samshuddin
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  ABSTRACT: A new polymorph of the title compound, CHBrNO, has been determined at 173 K in the space group 2/. The previous room-temperature structure was reported to crystallize in the ortho-rhom-bic space group 2 [Andreetti (1968 ▶). B, 1195-1198]. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds forming chains along [010]. Weak C-H⋯π inter-actions are also present.
  Acta Crystallographica Section E Structure Reports Online 03/2013; 69(Pt 3):o461. · 0.35 Impact Factor
• Article: N'-[(E)-4-Hy-droxy-benzyl-idene]-2-(naph-tha-len-2-yl-oxy)acetohydrazide.

  Rajni Kant, Vivek K Gupta, Kamini Kapoor, S Samshuddin, B Narayana, B K Sarojini
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  ABSTRACT: The asymmetric unit of the title compound, C(19)H(16)N(2)O(3), contains two independent mol-ecules in which the dihedral angles between the naphthalene ring system and the benzene ring are 10.0 (1) and 35.3 (1)°. In the crystal, mol-ecules are linked by N-H⋯O and O-H⋯O hydrogen bonds, forming a two-dimensional framework parallel to (001). Weak C-H⋯O and C-H⋯N hydrogen bonds complete a three-dimensional network.
  Acta Crystallographica Section E Structure Reports Online 10/2012; 68(Pt 10):o2923-4. · 0.35 Impact Factor
• Article: N-(1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl)-4,4''-difluoro-5'-hy-droxy-1,1':3',1''-terphenyl-4'-carboxamide.

  Hoong-Kun Fun, Tze Shyang Chia, S Samshuddin, B Narayana, B K Sarojini
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  ABSTRACT: The asymmetric unit of the title compound, C(27)H(16)F(2)N(2)O(4), consists of two crystallographically independent mol-ecules (A and B). In mol-ecule B, the isoindoline-1,3-dione ring system is disordered over two set of sites with a site-occupancy ratio of 0.658 (12):0.342 (12). In mol-ecule A, the fluoro-substituted benzene rings make dihedral angles of 18.36 (8) and 46.37 (8)° with the central benzene ring, whereas the corresponding angles are 40.90 (8) and 52.89 (9)° in mol-ecule B. The isoindoline ring system in mol-ecule A and the major and minor components of the disordered isoindoline ring system in mol-ecule B make dihedral angles of 58.50 (4), 54.13 (16) and 70.01 (28) °, respectively, with their attached benzene rings, linked through the amide group. An intra-molecular O-H⋯O hydrogen bond generates an S(6) ring in each mol-ecule. In the crystal, mol-ecules are linked by N-H⋯O, C-H⋯F and C-H⋯O hydrogen bonds into sheets lying parallel to the bc plane. The crystal studied was a non-merohedral twin with a refined twin component ratio of 0.9316 (8):0.0684 (8).
  Acta Crystallographica Section E Structure Reports Online 09/2012; 68(Pt 9):o2619-20. · 0.35 Impact Factor
• Article: (2E)-1-(4,4''-Difluoro-5'-meth-oxy-1,1':3',1''-terphenyl-4'-yl)-3-[4-(methyl-sulfan-yl)phen-yl]prop-2-en-1-one.

  Rajni Kant, Vivek K Gupta, Kamini Kapoor, S Samshuddin, B Narayana
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  ABSTRACT: In the title compound, C(29)H(22)F(2)O(2)S, the central benzene ring makes dihedral angles of 45.83 (7), 38.90 (7) and 55.50 (7)° with the two fluoro-substituted benzene rings and the methyl-sulfanyl-substituted benzene ring, respectively. In the crystal, C-H⋯O contacts connect the mol-ecules into layers lying perpendicular to the c axis. In addition, π-π stacking inter-actions between one of the fluoro-phenyl groups [centroid-centroid distances = 3.681 (1) and 3.818 (1) Å] are observed.
  Acta Crystallographica Section E Structure Reports Online 08/2012; 68(Pt 8):o2378. · 0.35 Impact Factor
• Article: 2-[3,5-Bis(4-meth-oxy-phen-yl)-4,5-di-hydro-1H-pyrazol-1-yl]-4,6-bis-(4-meth-oxy-phen-yl)pyrimidine.

  Rajni Kant, Vivek K Gupta, Kamini Kapoor, S Samshuddin, B Narayana
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  ABSTRACT: In the title compound, C(35)H(32)N(4)O(4), the pyrazole ring forms a dihedral angle of 15.04 (8)° with the adjacent pyrimidine ring. The pyrimidine ring forms dihedral angles of 9.95 (8) and 1.86 (7)° with its adjacent meth-oxy-substituted benzene rings, whereas the equivalent angles are 80.24 (9) and 11.55 (9)° for the pyrazole ring and its adjacent benzene rings. The crystal packing features π-π inter-actions, the centroid-centroid distance between the pyrimidine and methoxyphenyl rings being 3.604 (1) Å. The pyrazole ring is nearly planar, with a maximum deviation of 0.020 (3) Å for the -CH(2)- carbon.
  Acta Crystallographica Section E Structure Reports Online 08/2012; 68(Pt 8):o2398. · 0.35 Impact Factor
• Source

  Available from: Narayana Balakrishna

  Article: (2E)-3-(4-Cyano-phen-yl)-1-(4,4''-difluoro-5'-meth-oxy-1,1':3',1''-terphenyl-4'-yl)prop-2-en-1-one.

  Hoong-Kun Fun, Wan-Sin Loh, S Samshuddin, B Narayana, B K Sarojini
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  ABSTRACT: In the title compound, C(29)H(19)F(2)NO(2), the central benzene ring forms a dihedral angle of 56.92 (12)° with the cyano-benzene ring and dihedral angles of 40.91 (12) and 44.76 (12)° with the two fluoro-benzene rings. In the crystal, C-H⋯O and C-H⋯F hydrogen bonds link the mol-ecules into sheets lying parallel to the ab plane. The crystal packing also features C-H⋯π inter-actions involving the central benzene ring.
  Acta Crystallographica Section E Structure Reports Online 06/2012; 68(Pt 6):o1877-8. · 0.35 Impact Factor
• Source

  Available from: Narayana Balakrishna

  Article: 3,5-Bis(4-fluoro-phen-yl)isoxazole.

  Hoong-Kun Fun, Suhana Arshad, S Samshuddin, B Narayana, B K Sarojini
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  ABSTRACT: In the crystal structure of the title compound, C(15)H(9)F(2)NO, the complete mol-ecule is generated by a crystallographic twofold rotation axis and the O and N atoms of the central isoxazole ring are statistically disordered with equal site occupancies. The terminal benzene rings form a dihedral angle of 24.23 (3)° with the isoxazole ring. The dihedral angle between the benzene rings is 47.39 (2)°. No significant inter-molecular inter-actions are observed.
  Acta Crystallographica Section E Structure Reports Online 06/2012; 68(Pt 6):o1783. · 0.35 Impact Factor
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  Available from: Narayana Balakrishna

  Article: [2,6-Bis(biphenyl-4-yl)-4-hy-droxy-4-(pyridin-2-yl)cyclo-hexane-1,3-di-yl]bis-[(pyridin-2-yl)methanone]-butan-2-one (1/1).

  Hoong-Kun Fun, Chin Wei Ooi, S Samshuddin, B Narayana, B K Sarojini
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  ABSTRACT: In the title solvate, C(47)H(37)N(3)O(3)·C(4)H(8)O, the cyclo-hexane ring adopts a chair conformation and the plane through its near coplanar atoms forms dihedral angles of 82.58 (7), 89.27 (7), 60.30 (8), 54.54 (7) and 72.03 (7)°, respectively, with the three pyridine rings and the two attached benzene rings. The rings of the biphenyl units are twisted from each other, making dihedral angles of 35.27 (7) and 45.41 (7)°. All the rings are in equatorial orientations in the cyclo-hexane ring, except for the C=O-bonded pyridine ring in position 1, which is axial. Intra-molecular O-H⋯N and C-H⋯O hydrogen bonds form one S(5) and three S(6) ring motifs. In the crystal, mol-ecules are linked via C-H⋯O hydrogen bonds into a chain along the c axis. The crystal structure also features weak C-H⋯π inter-actions and aromatic π-π stacking [centroid-centroid distances = 3.5856 (10) and 3.7090 (9) Å].
  Acta Crystallographica Section E Structure Reports Online 06/2012; 68(Pt 6):o1633-4. · 0.35 Impact Factor
• Source

  Available from: Narayana Balakrishna

  Article: (2E)-1-(4,4''-Difluoro-5'-meth-oxy-1,1':3',1''-terphenyl-4'-yl)-3-(2,6-difluoro-phen-yl)prop-2-en-1-one.

  Hoong-Kun Fun, Tze Shyang Chia, S Samshuddin, B Narayana, B K Sarojini
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  ABSTRACT: In the title compound, C(28)H(18)F(4)O(2), the central benzene ring makes dihedral angles of 44.27 (6), 56.33 (5) and 77.27 (6)° with the two adjacent fluoro-benzene rings and terminal difluoro-substituted benzene ring, respectively. The dihedral angle between the fluoro-benzene rings is 87.81 (6)°. The meth-oxy and prop-2-en-1-one groups are essentially coplanar with their attached benzene rings, as indicated by their C-O-C(ar)-C(ar) [-0.06 (15)°] and C-C-C(ar)-C(ar) [4.5 (2)°] (ar = aromatic) torsion angles. In the crystal, mol-ecules are linked by C-H⋯F and C-H⋯O hydrogen bonds into sheets lying parallel to the ac plane. The crystal structure also features C-H⋯π inter-actions.
  Acta Crystallographica Section E Structure Reports Online 05/2012; 68(Pt 5):o1560-1. · 0.35 Impact Factor
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  Available from: Narayana Balakrishna

  Article: (2E)-3-(2-Bromo-phen-yl)-1-(4,4''-difluoro-5'-meth-oxy-1,1':3',1''-terphenyl-4'-yl)prop-2-en-1-one.

  Hoong-Kun Fun, Tze Shyang Chia, S Samshuddin, B Narayana, B K Sarojini
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  ABSTRACT: In the title compound, C(28)H(19)BrF(2)O(2), the central benzene ring makes dihedral angles of 62.51 (18), 46.23 (18) and 48.19 (18)° with the bromo-substituted benzene ring and two terminal fluoro-substituted benzene rings, respectively. In the crystal, mol-ecules are linked by C-H⋯F hydrogen bonds into infinite chains along [110]. Weak C-H⋯π and π-π inter-actions [centroid-centroid distance = 3.683 (2) Å] also occur and short inter-molecular F⋯F contacts [2.833 (4) Å] are observed.
  Acta Crystallographica Section E Structure Reports Online 05/2012; 68(Pt 5):o1314-5. · 0.35 Impact Factor
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  Available from: Narayana Balakrishna

  Article: 1-[3-(4-Chloro-phen-yl)-5-(4-meth-oxy-phen-yl)-4,5-dihydro-1H-pyrazol-1-yl]butan-1-one.

  Hoong-Kun Fun, Ching Kheng Quah, S Samshuddin, B Narayana, B K Sarojini
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  ABSTRACT: In the title compound, C(20)H(21)ClN(2)O(2), the benzene rings form dihedral angles of 6.35 (5) and 81.82 (5)° with the mean plane of the 4,5-dihydro-1H-pyrazole ring (r.m.s. deviation = 0.145 Å). This latter ring adopts an envelope conformation with the CH grouping as the flap. The dihedral angle between the benzene rings is 75.63 (4)°. In the crystal, mol-ecules are linked by C-H⋯Cl and C-H⋯O hydrogen bonds into chains along [-201]. The crystal structure also features C-H⋯π inter-actions.
  Acta Crystallographica Section E Structure Reports Online 04/2012; 68(Pt 4):o975. · 0.35 Impact Factor
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  Available from: Narayana Balakrishna

  Article: 1-[3-(4-Chloro-phen-yl)-5-(4-meth-oxy-phen-yl)-4,5-dihydro-1H-pyrazol-1-yl]ethanone.

  Hoong-Kun Fun, Ching Kheng Quah, S Samshuddin, B Narayana, B K Sarojini
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  ABSTRACT: In the title compound, C(18)H(17)ClN(2)O(2), the benzene rings form dihedral angles of 6.69 (6) and 74.88 (5)° with the 4,5-dihydro-1H-pyrazole ring. The benzene rings form a dihedral angle of 76.67 (5)° with each other. In the crystal, mol-ecules are linked via bifurcated (C,C)-H⋯O hydrogen bonds into chains along [010]. The crystal structure is further consolidated by C-H⋯π inter-actions.
  Acta Crystallographica Section E Structure Reports Online 04/2012; 68(Pt 4):o1023. · 0.35 Impact Factor
• Source

  Available from: Jerry P. Jasinski

  Article: (6Z)-3,5-Bis(4-fluoro-phen-yl)-6-(1-hy-droxy-ethyl-idene)cyclo-hex-2-en-1-one.

  Jerry P Jasinski, James A Golen, S Samshuddin, B Narayana, H S Yathirajan
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  ABSTRACT: In the title compound, C(20)H(16)F(2)O(2), the cyclo-hex-2-en-1-one ring adopts a distorted envelope conformation and the dihedral angles between its six-atom mean plane and the fluorophenyl rings are 38.9(8) and 82.3(1)°. The two fluoro-phenyl rings are oriented at an angle of 77.3 (3)°. The long hy-droxy O-H bond length of 1.22 (3) and the H⋯O distance of 1.28 (3) Å, together with a longer than expected C=O bond length [1.290 (2) Å] in the hy-droxy(en-1-one) group, indicate sharing of the H atom as O⋯H⋯O between the two O atoms and the influence of electron delocalization. Weak C-H⋯O inter-molecular inter-actions form an infinite two-dimensional network in (011).
  Acta Crystallographica Section E Structure Reports Online 03/2012; 68(Pt 3):o638-9. · 0.35 Impact Factor
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  Available from: Jerry P. Jasinski

  Article: Ethyl 2-amino-4,6-bis-(4-fluoro-phen-yl)cyclo-hexa-1,3-diene-1-carboxyl-ate.

  Jerry P Jasinski, James A Golen, S Samshuddin, B Narayana, H S Yathirajan
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  ABSTRACT: In the title compound, C(21)H(19)F(2)NO(2), the cyclo-hexa-1,3-diene ring is in a distorted envelope conformation. The dihedral angles between the mean planes of the diene moiety and the two fluoro-phenyl rings are 42.8 (2) and 75.0 (5)°. The two fluoro-phenyl rings are inclined to one another by 87.0 (3)°. In the crystal, intra-molecular N-H⋯O hydrogen bonds and weak N-H⋯O and N-H⋯F inter-molecular inter-actions are observed forming an infinite two-dimensional network along [011].
  Acta Crystallographica Section E Structure Reports Online 03/2012; 68(Pt 3):o585. · 0.35 Impact Factor
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  Available from: Narayana Balakrishna

  Article: 2-[3,5-Bis-(4-fluoro-phen-yl)-4,5-dihydro-1H-pyrazol-1-yl]-4,6-bis(4-fluoro-phenyl)pyrimidine.

  Hoong-Kun Fun, Tze Shyang Chia, S Samshuddin, B Narayana, B K Sarojini
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  ABSTRACT: In the title compound, C(31)H(20)F(4)N(4), the pyrazole ring adopts an envelope conformation and forms a dihedral angle of 9.91 (6)° with the adjacent pyrimidine ring. The pyrimidine ring forms dihedral angles of 9.23 (6) and 2.16 (5)° with its adjacent fluoro-substituted benzene rings, whereas these angles are 88.22 (6) and 9.66 (6)° for the pyrazole ring and its adjacent benzene rings. In the crystal, mol-ecules are linked by C-H⋯F hydrogen bonds into ribbons along [01-1]. The crystal packing is further stabilized by C-H⋯π and by π-π inter-actions, with centroid-centroid distances of 3.7428 (7) and 3.7630 (6) Å.
  Acta Crystallographica Section E Structure Reports Online 03/2012; 68(Pt 3):o807-8. · 0.35 Impact Factor
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  Available from: Narayana Balakrishna

  Article: Ethyl ({5-[5'-(2-eth-oxy-2-oxoeth-oxy)-4,4''-difluoro-1,1':3',1''-terphenyl-4'-yl]-1,3,4-oxadiazol-2-yl}sulfan-yl)acetate.

  Hoong-Kun Fun, Suhana Arshad, S Samshuddin, B Narayana, B K Sarojini
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  ABSTRACT: In the title compound, C(28)H(24)F(2)N(2)O(6)S, the whole mol-ecule is disordered over two sites with refined occupancies of 0.778 (3) and 0.222 (3). The central benzene ring makes dihedral angles of 56.0 (4), 34.5 (4) and 70.9 (4)°, respectively, with the two terminal benzene rings and the 1,3,4-oxadiazole ring in the major component of the disordered mol-ecule. The corresponding angles in the minor component are 59.7 (16), 25.6 (13) and 75.5 (14)°. In the crystal, mol-ecules are linked via C-H⋯F, C-H⋯N, C-H⋯O and C-H⋯S hydrogen bonds into a three-dimensional network. In addition, C-H⋯π inter-actions are observed.
  Acta Crystallographica Section E Structure Reports Online 03/2012; 68(Pt 3):o674-5. · 0.35 Impact Factor
• Article: Ethyl 4,4''-difluoro-5'-meth-oxy-1,1':3',1''-terphenyl-4'-carboxyl-ate.

  Hoong-Kun Fun, Tze Shyang Chia, S Samshuddin, B Narayana, B K Sarojini
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  ABSTRACT: In the title compound, C(22)H(18)F(2)O(3), the two fluoro-substituted rings form dihedral angles of 25.89 (15) and 55.00 (12)° with the central benzene ring. The eth-oxy group in the mol-ecule is disordered over two positions with a site-occupancy ratio of 0.662 (7):0.338 (7). In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds into chains along the a axis. The crystal packing is further stabilized by C-H⋯π and π-π inter-actions, with centroid-centroid distances of 3.8605 (15) Å.
  Acta Crystallographica Section E Structure Reports Online 01/2012; 68(Pt 1):o172. · 0.35 Impact Factor
• Article: (1E,4E)-1-(3-Nitro-phen-yl)-5-phenyl-penta-1,4-dien-3-one.

  S Samshuddin, Ray J Butcher, Mehmet Akkurt, B Narayana, B K Sarojini, H S Yathirajan
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  ABSTRACT: In the title compound, C(17)H(13)NO(3), the dihedral angle between the benzene rings is 31.21 (5)°. In the crystal, inversion dimers linked by pairs of C-H⋯O hydrogen bonds occur. A C-H⋯π inter-action is also indicated.
  Acta Crystallographica Section E Structure Reports Online 01/2012; 68(Pt 1):o74-5. · 0.35 Impact Factor
• Article: 1-(4,4''-Difluoro-5'-meth-oxy-1,1':3',1''-terphenyl-4'-yl)ethanone.

  Hoong-Kun Fun, Madhukar Hemamalini, S Samshuddin, B Narayana, B K Sarojini
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  ABSTRACT: In the title compound, C(21)H(16)F(2)O(2), the central benzene ring is inclined at dihedral angles of 30.91 (8) and 46.88 (7)° to the two terminal fluoro-substituted rings. The dihedral angle between the two terminal fluoro-subsituted rings is 68.34 (8)°. An intra-molecular C-H⋯O hydrogen bond generates an S(6) ring motif. The crystal structure is stabilized by weak C-H⋯π inter-actions.
  Acta Crystallographica Section E Structure Reports Online 01/2012; 68(Pt 1):o163. · 0.35 Impact Factor
• Article: (2E)-2-[(3E)-4-Phenyl-but-3-en-2-yl-idene]hydrazinecarboxamide.

  S Samshuddin, Ray J Butcher, Sema Ozturk Yıldırım, Mehmet Akkurt, B Narayana, H S Yathirajan
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  ABSTRACT: In the title compound, C(11)H(13)N(3)O, the phenyl ring is disordered over two sites, with occupancy factors in a 0.520 (17):0.480 (17) ratio. The dihedral angle between the ring planes of the major and minor components of the disordered ring is 12.9 (2)°. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds, forming R(2) (2)(8) ring motifs. C-H⋯O, C-H⋯N and C-H⋯π inter-actions also occur.
  Acta Crystallographica Section E Structure Reports Online 01/2012; 68(Pt 1):o76-7. · 0.35 Impact Factor