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Crystals 2012, 2(3), 1108-1115; doi:10.3390/cryst2031108
Article

Synthesis, Characterization and Crystal Structures of 3,5-Bis(4-fluorophenyl)-4,5-dihydro-1H-pyrazole-1-carboxamide and 3,5-Bis(4-fluorophenyl)-4,5-dihydro-1H-pyrazole-1-carbothioamide

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Received: 28 June 2012; in revised form: 19 July 2012 / Accepted: 24 July 2012 / Published: 15 August 2012
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Abstract: Two new pyrazoline derivatives, 3,5-bis(4-fluorophenyl)-4,5-dihydropyrazole-1-carboxamide (1) and 3,5-bis(4-fluorophenyl)-4,5-dihydropyrazole-1-carbothioamide (2), were synthesized by reacting 4,4'-difluoro chalcone with semicarbazide hydrochloride and thiosemicarbazide in ethanolic sodium hydroxide solution. Both the compounds were confirmed by single crystal X-ray diffraction data and supported by IR, NMR, and mass spectral data. In 1, crystal packing is stabilized by N–H…O hydrogen bonds and weak N–H...N, N–H…F and C–H…F intermolecular interactions. In 2, only weak N–H…F and N–H…S intermolecular interactions are observed. Crystal data: C16H13F2N3O, (1), Mr = 301.29, monoclinic, C2/c, a = 17.6219(6) Å, b = 10.8735(3) Å, c = 15.3216(5) Å, β = 102.864(3)°, V = 2862.11(16) Å3, Z = 8, T = 173 K, R(F) = 0.0511, wR(F2) = 0.1333; C16H13F2N3S, (2), Mr = 317.35, monoclinic, P21/c, a = 14.339(2) Å, b = 11.1478(17) Å, c = 9.541(2)(5) Å, β = 107.007(18)°, V = 1458.5(5) Å3, Z = 4, T = 173 K, R(F) = 0.0413, wR(F2) = 0.0959.
Keywords: pyrazoline derivatives; X-ray crystal structure; hydrogen bonds; weak intermolecular interactions pyrazoline derivatives; X-ray crystal structure; hydrogen bonds; weak intermolecular interactions
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Jasinski, J.P.; Golen, J.A.; Samshuddin, S.; Narayana, B.; Yathirajan, H.S. Synthesis, Characterization and Crystal Structures of 3,5-Bis(4-fluorophenyl)-4,5-dihydro-1H-pyrazole-1-carboxamide and 3,5-Bis(4-fluorophenyl)-4,5-dihydro-1H-pyrazole-1-carbothioamide. Crystals 2012, 2, 1108-1115.

AMA Style

Jasinski JP, Golen JA, Samshuddin S, Narayana B, Yathirajan HS. Synthesis, Characterization and Crystal Structures of 3,5-Bis(4-fluorophenyl)-4,5-dihydro-1H-pyrazole-1-carboxamide and 3,5-Bis(4-fluorophenyl)-4,5-dihydro-1H-pyrazole-1-carbothioamide. Crystals. 2012; 2(3):1108-1115.

Chicago/Turabian Style

Jasinski, Jerry P.; Golen, James A.; Samshuddin, Seranthimata; Narayana, Badiadka; Yathirajan, Hemmige S. 2012. "Synthesis, Characterization and Crystal Structures of 3,5-Bis(4-fluorophenyl)-4,5-dihydro-1H-pyrazole-1-carboxamide and 3,5-Bis(4-fluorophenyl)-4,5-dihydro-1H-pyrazole-1-carbothioamide." Crystals 2, no. 3: 1108-1115.


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