organic compounds
of 2-{[(naphthalen-1-yl)oxy]methyl}-5-(2,4,5-trifluorophenyl)-1,3,4-oxadiazole
aDepartment of Chemistry, Anna University, Chennai 600 025, India, bOrchid Chemicals & Pharmaceuticals Ltd, R&D Centre, Sholinganallur, Chennai 600 119, India, and cCentre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India
*Correspondence e-mail: kathsubramanianannauniv@gmail.com
In the title compound C19H11F3N2O2, the oxadiazole ring and the naphthalene ring system are approximately planar (r.m.s. deviations of 0.001 and 0.020 Å, respectively) and the oxadiazole ring makes dihedral angles of 13.11 (1) and 7.59 (1)° with the naphthalene ring system and the trifluorophenyl ring, respectively. In the crystal, C—H⋯N hydrogen bonds link molecules into chains along the a-axis direction, while C—H⋯F contacts form additional chains along the ac diagonal. These contacts generate sheets of molecules approximately parallel to the (011) plane.
Keywords: crystal structure; naphthalen-1-yloxy; trifluorophenyl; 1,3,4-oxadiazole; hydrogen bonding.
CCDC reference: 1049573
1. Related literature
For the biological activity and other applications of triazole derivatives, see: Desai et al. (2014); Bhat et al. (2011); Katrin et al. (2005); Shailaja et al. (2010).
2. Experimental
2.1. Crystal data
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2.3. Refinement
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Data collection: APEX2 (Bruker, 2008); cell SAINT (Bruker, 2008); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: SHELXL97 and PLATON (Spek, 2009).
Supporting information
CCDC reference: 1049573
10.1107/S2056989015003205/sj5445sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S2056989015003205/sj5445Isup2.hkl
Supporting information file. DOI: 10.1107/S2056989015003205/sj5445Isup3.cml
Iodobenzene diacetate (2.0 mol eq) was added to a solution of naphthalen-1-yloxy-acetic acid (2, 4, 5-trifluoro-benzylidene)-hydrazide (1.0 mole eq) in dioxane (10mL) at 25-30 ° C and stirred at the same temperature for 15-30 minutes. Completion of the reaction was confirmed by TLC (mobile phase ethyl acetate/hexane, 3:7). The dioxane was distilled off under vacuum. The resulting residue was dissolved in ethyl acetate and washed with saturated sodium bicarbonate solution, followed by water and brine solution. The separated organic layer was dried over anhydrous sodium sulfate and distilled under vacuum. The crude product was purified by
over silica gel (60-120 mesh) using hexane and ethyl acetate (9:1) as to afford the pure product of as an off-white solid. After purification the compound was crystallized from methanol by the slow evaporation method.The hydrogen atoms were placed in calculated positions with C—H = 0.93Å, refined in the riding model with fixed isotropic displacement parameters: Uiso(H) = 1.5Ueq(C) for the methyl group and Uiso(H) = 1.2Ueq(C) for other H atoms.
Data collection: APEX2 (Bruker, 2008); cell
SAINT (Bruker, 2008); data reduction: SAINT (Bruker, 2008); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).C19H11F3N2O2 | Z = 2 |
Mr = 356.30 | F(000) = 364 |
Triclinic, P1 | Dx = 1.493 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 7.4817 (5) Å | Cell parameters from 3330 reflections |
b = 7.5928 (5) Å | θ = 1.3–26.8° |
c = 15.7908 (10) Å | µ = 0.12 mm−1 |
α = 78.673 (3)° | T = 293 K |
β = 78.404 (3)° | Block, colourless |
γ = 65.370 (3)° | 0.25 × 0.15 × 0.10 mm |
V = 792.36 (9) Å3 |
Bruker SMART APEXII area-detector diffractometer | 3330 independent reflections |
Radiation source: fine-focus sealed tube | 2402 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.031 |
ω and ϕ scans | θmax = 26.8°, θmin = 1.3° |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | h = −9→9 |
Tmin = 0.970, Tmax = 0.988 | k = −9→9 |
11539 measured reflections | l = −19→19 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.047 | H-atom parameters constrained |
wR(F2) = 0.140 | w = 1/[σ2(Fo2) + (0.062P)2 + 0.2065P] where P = (Fo2 + 2Fc2)/3 |
S = 1.04 | (Δ/σ)max < 0.001 |
3330 reflections | Δρmax = 0.22 e Å−3 |
236 parameters | Δρmin = −0.31 e Å−3 |
0 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.006 (2) |
C19H11F3N2O2 | γ = 65.370 (3)° |
Mr = 356.30 | V = 792.36 (9) Å3 |
Triclinic, P1 | Z = 2 |
a = 7.4817 (5) Å | Mo Kα radiation |
b = 7.5928 (5) Å | µ = 0.12 mm−1 |
c = 15.7908 (10) Å | T = 293 K |
α = 78.673 (3)° | 0.25 × 0.15 × 0.10 mm |
β = 78.404 (3)° |
Bruker SMART APEXII area-detector diffractometer | 3330 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | 2402 reflections with I > 2σ(I) |
Tmin = 0.970, Tmax = 0.988 | Rint = 0.031 |
11539 measured reflections |
R[F2 > 2σ(F2)] = 0.047 | 0 restraints |
wR(F2) = 0.140 | H-atom parameters constrained |
S = 1.04 | Δρmax = 0.22 e Å−3 |
3330 reflections | Δρmin = −0.31 e Å−3 |
236 parameters |
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > 2sigma(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. |
x | y | z | Uiso*/Ueq | ||
C1 | 0.4888 (3) | 0.3315 (3) | 0.37814 (13) | 0.0588 (5) | |
H1 | 0.5114 | 0.2802 | 0.4354 | 0.071* | |
C2 | 0.6415 (3) | 0.3567 (3) | 0.31604 (15) | 0.0691 (6) | |
H2 | 0.7656 | 0.3212 | 0.3326 | 0.083* | |
C3 | 0.6121 (3) | 0.4313 (3) | 0.23273 (14) | 0.0673 (5) | |
H3 | 0.7168 | 0.4439 | 0.1925 | 0.081* | |
C4 | 0.4239 (3) | 0.4907 (3) | 0.20584 (12) | 0.0543 (5) | |
C5 | 0.3867 (3) | 0.5717 (3) | 0.12011 (13) | 0.0670 (5) | |
H5 | 0.4891 | 0.5862 | 0.0789 | 0.080* | |
C6 | 0.2045 (4) | 0.6293 (3) | 0.09616 (14) | 0.0744 (6) | |
H6 | 0.1830 | 0.6829 | 0.0390 | 0.089* | |
C7 | 0.0489 (3) | 0.6080 (3) | 0.15737 (14) | 0.0699 (6) | |
H7 | −0.0759 | 0.6483 | 0.1406 | 0.084* | |
C8 | 0.0783 (3) | 0.5289 (3) | 0.24135 (13) | 0.0578 (5) | |
H8 | −0.0265 | 0.5158 | 0.2814 | 0.069* | |
C9 | 0.2666 (3) | 0.4668 (2) | 0.26779 (11) | 0.0474 (4) | |
C10 | 0.3070 (3) | 0.3827 (2) | 0.35414 (11) | 0.0483 (4) | |
C11 | 0.1842 (3) | 0.2579 (3) | 0.49334 (11) | 0.0540 (4) | |
H11A | 0.2063 | 0.3365 | 0.5285 | 0.065* | |
H11B | 0.2998 | 0.1361 | 0.4898 | 0.065* | |
C12 | 0.0033 (3) | 0.2197 (2) | 0.53195 (11) | 0.0491 (4) | |
C13 | −0.1893 (3) | 0.1278 (2) | 0.63030 (12) | 0.0516 (4) | |
C14 | −0.2556 (3) | 0.0518 (3) | 0.71692 (12) | 0.0595 (5) | |
C15 | −0.1309 (4) | −0.0186 (3) | 0.78032 (14) | 0.0767 (6) | |
H15 | −0.0047 | −0.0168 | 0.7679 | 0.092* | |
C16 | −0.1951 (6) | −0.0916 (4) | 0.86218 (16) | 0.1020 (10) | |
C17 | −0.3818 (6) | −0.0941 (4) | 0.88135 (19) | 0.1061 (12) | |
C18 | −0.5058 (5) | −0.0245 (4) | 0.8207 (2) | 0.1034 (11) | |
H18 | −0.6323 | −0.0254 | 0.8342 | 0.124* | |
C19 | −0.4444 (4) | 0.0477 (3) | 0.73917 (17) | 0.0761 (7) | |
N1 | −0.1442 (3) | 0.2435 (2) | 0.49547 (10) | 0.0622 (4) | |
N2 | −0.2727 (2) | 0.1818 (2) | 0.56086 (11) | 0.0620 (4) | |
O1 | 0.14915 (18) | 0.35881 (19) | 0.40929 (8) | 0.0582 (4) | |
O2 | −0.01186 (18) | 0.14762 (17) | 0.61719 (7) | 0.0520 (3) | |
F1 | −0.0726 (4) | −0.1601 (3) | 0.92306 (11) | 0.1607 (9) | |
F2 | −0.4342 (4) | −0.1687 (3) | 0.96228 (11) | 0.1684 (11) | |
F3 | −0.5703 (2) | 0.1171 (3) | 0.68014 (13) | 0.1095 (6) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0581 (11) | 0.0638 (11) | 0.0548 (11) | −0.0257 (9) | −0.0118 (9) | 0.0004 (9) |
C2 | 0.0548 (11) | 0.0827 (14) | 0.0737 (14) | −0.0332 (10) | −0.0113 (10) | −0.0018 (11) |
C3 | 0.0564 (11) | 0.0796 (13) | 0.0672 (13) | −0.0357 (10) | 0.0033 (10) | −0.0038 (10) |
C4 | 0.0632 (11) | 0.0516 (9) | 0.0494 (10) | −0.0280 (8) | 0.0000 (8) | −0.0044 (8) |
C5 | 0.0804 (14) | 0.0697 (12) | 0.0523 (11) | −0.0389 (11) | 0.0030 (10) | −0.0017 (9) |
C6 | 0.0996 (18) | 0.0763 (14) | 0.0483 (11) | −0.0395 (13) | −0.0165 (11) | 0.0081 (10) |
C7 | 0.0737 (13) | 0.0743 (13) | 0.0643 (13) | −0.0317 (11) | −0.0240 (11) | 0.0069 (10) |
C8 | 0.0586 (11) | 0.0608 (11) | 0.0557 (11) | −0.0285 (9) | −0.0075 (9) | 0.0000 (8) |
C9 | 0.0538 (10) | 0.0431 (8) | 0.0461 (9) | −0.0215 (7) | −0.0049 (7) | −0.0038 (7) |
C10 | 0.0498 (10) | 0.0478 (9) | 0.0468 (10) | −0.0212 (7) | −0.0020 (8) | −0.0047 (7) |
C11 | 0.0594 (11) | 0.0543 (10) | 0.0452 (10) | −0.0225 (8) | −0.0082 (8) | 0.0021 (8) |
C12 | 0.0587 (10) | 0.0461 (9) | 0.0404 (9) | −0.0205 (8) | −0.0072 (8) | −0.0006 (7) |
C13 | 0.0597 (11) | 0.0440 (9) | 0.0495 (10) | −0.0213 (8) | −0.0028 (8) | −0.0049 (7) |
C14 | 0.0797 (13) | 0.0438 (9) | 0.0496 (11) | −0.0250 (9) | 0.0047 (9) | −0.0061 (8) |
C15 | 0.1047 (18) | 0.0658 (12) | 0.0487 (12) | −0.0290 (12) | −0.0033 (11) | −0.0001 (9) |
C16 | 0.170 (3) | 0.0668 (14) | 0.0494 (13) | −0.0327 (17) | −0.0085 (17) | 0.0005 (11) |
C17 | 0.174 (3) | 0.0633 (14) | 0.0662 (17) | −0.0576 (18) | 0.047 (2) | −0.0151 (12) |
C18 | 0.130 (3) | 0.0742 (16) | 0.100 (2) | −0.0583 (17) | 0.0498 (19) | −0.0246 (15) |
C19 | 0.0887 (16) | 0.0575 (12) | 0.0788 (15) | −0.0364 (11) | 0.0182 (13) | −0.0137 (11) |
N1 | 0.0677 (10) | 0.0713 (10) | 0.0480 (9) | −0.0315 (8) | −0.0122 (8) | 0.0060 (7) |
N2 | 0.0668 (10) | 0.0677 (10) | 0.0549 (10) | −0.0327 (8) | −0.0108 (8) | 0.0020 (8) |
O1 | 0.0534 (7) | 0.0692 (8) | 0.0444 (7) | −0.0241 (6) | −0.0046 (5) | 0.0083 (6) |
O2 | 0.0606 (8) | 0.0538 (7) | 0.0410 (7) | −0.0243 (6) | −0.0080 (5) | 0.0010 (5) |
F1 | 0.249 (3) | 0.1436 (16) | 0.0596 (10) | −0.0549 (17) | −0.0400 (13) | 0.0235 (10) |
F2 | 0.303 (3) | 0.1016 (12) | 0.0759 (11) | −0.1005 (16) | 0.0777 (14) | −0.0141 (9) |
F3 | 0.0853 (10) | 0.1222 (13) | 0.1295 (14) | −0.0566 (9) | 0.0005 (10) | −0.0139 (11) |
C1—C10 | 1.361 (3) | C11—C12 | 1.487 (3) |
C1—C2 | 1.401 (3) | C11—H11A | 0.9700 |
C1—H1 | 0.9300 | C11—H11B | 0.9700 |
C2—C3 | 1.349 (3) | C12—N1 | 1.277 (2) |
C2—H2 | 0.9300 | C12—O2 | 1.351 (2) |
C3—C4 | 1.415 (3) | C13—N2 | 1.283 (2) |
C3—H3 | 0.9300 | C13—O2 | 1.368 (2) |
C4—C5 | 1.404 (3) | C13—C14 | 1.451 (3) |
C4—C9 | 1.421 (2) | C14—C15 | 1.381 (3) |
C5—C6 | 1.355 (3) | C14—C19 | 1.398 (3) |
C5—H5 | 0.9300 | C15—C16 | 1.378 (3) |
C6—C7 | 1.400 (3) | C15—H15 | 0.9300 |
C6—H6 | 0.9300 | C16—F1 | 1.340 (4) |
C7—C8 | 1.364 (3) | C16—C17 | 1.376 (5) |
C7—H7 | 0.9300 | C17—F2 | 1.344 (3) |
C8—C9 | 1.410 (3) | C17—C18 | 1.344 (5) |
C8—H8 | 0.9300 | C18—C19 | 1.366 (4) |
C9—C10 | 1.422 (2) | C18—H18 | 0.9300 |
C10—O1 | 1.375 (2) | C19—F3 | 1.334 (3) |
C11—O1 | 1.411 (2) | N1—N2 | 1.413 (2) |
C10—C1—C2 | 119.51 (18) | C12—C11—H11A | 110.5 |
C10—C1—H1 | 120.2 | O1—C11—H11B | 110.5 |
C2—C1—H1 | 120.2 | C12—C11—H11B | 110.5 |
C3—C2—C1 | 121.32 (19) | H11A—C11—H11B | 108.7 |
C3—C2—H2 | 119.3 | N1—C12—O2 | 113.26 (16) |
C1—C2—H2 | 119.3 | N1—C12—C11 | 129.06 (16) |
C2—C3—C4 | 120.79 (18) | O2—C12—C11 | 117.67 (15) |
C2—C3—H3 | 119.6 | N2—C13—O2 | 112.38 (16) |
C4—C3—H3 | 119.6 | N2—C13—C14 | 129.71 (19) |
C5—C4—C3 | 122.47 (18) | O2—C13—C14 | 117.91 (17) |
C5—C4—C9 | 118.68 (18) | C15—C14—C19 | 118.1 (2) |
C3—C4—C9 | 118.85 (18) | C15—C14—C13 | 120.0 (2) |
C6—C5—C4 | 121.36 (19) | C19—C14—C13 | 122.0 (2) |
C6—C5—H5 | 119.3 | C16—C15—C14 | 119.4 (3) |
C4—C5—H5 | 119.3 | C16—C15—H15 | 120.3 |
C5—C6—C7 | 120.0 (2) | C14—C15—H15 | 120.3 |
C5—C6—H6 | 120.0 | F1—C16—C17 | 120.4 (3) |
C7—C6—H6 | 120.0 | F1—C16—C15 | 118.9 (3) |
C8—C7—C6 | 120.7 (2) | C17—C16—C15 | 120.7 (3) |
C8—C7—H7 | 119.6 | F2—C17—C18 | 121.7 (4) |
C6—C7—H7 | 119.6 | F2—C17—C16 | 117.6 (4) |
C7—C8—C9 | 120.36 (18) | C18—C17—C16 | 120.7 (3) |
C7—C8—H8 | 119.8 | C17—C18—C19 | 119.4 (3) |
C9—C8—H8 | 119.8 | C17—C18—H18 | 120.3 |
C8—C9—C4 | 118.84 (17) | C19—C18—H18 | 120.3 |
C8—C9—C10 | 123.12 (16) | F3—C19—C18 | 118.4 (3) |
C4—C9—C10 | 118.04 (16) | F3—C19—C14 | 119.9 (2) |
C1—C10—O1 | 124.10 (16) | C18—C19—C14 | 121.7 (3) |
C1—C10—C9 | 121.46 (16) | C12—N1—N2 | 105.99 (15) |
O1—C10—C9 | 114.45 (15) | C13—N2—N1 | 106.01 (15) |
O1—C11—C12 | 106.06 (14) | C10—O1—C11 | 117.48 (14) |
O1—C11—H11A | 110.5 | C12—O2—C13 | 102.37 (13) |
C10—C1—C2—C3 | 0.2 (3) | C13—C14—C15—C16 | −179.59 (18) |
C1—C2—C3—C4 | 1.4 (3) | C14—C15—C16—F1 | 179.8 (2) |
C2—C3—C4—C5 | 179.02 (19) | C14—C15—C16—C17 | −0.3 (4) |
C2—C3—C4—C9 | −1.2 (3) | F1—C16—C17—F2 | −0.6 (4) |
C3—C4—C5—C6 | −179.3 (2) | C15—C16—C17—F2 | 179.5 (2) |
C9—C4—C5—C6 | 0.9 (3) | F1—C16—C17—C18 | 179.6 (2) |
C4—C5—C6—C7 | −0.2 (3) | C15—C16—C17—C18 | −0.3 (4) |
C5—C6—C7—C8 | −0.3 (3) | F2—C17—C18—C19 | −179.3 (2) |
C6—C7—C8—C9 | −0.1 (3) | C16—C17—C18—C19 | 0.6 (4) |
C7—C8—C9—C4 | 0.9 (3) | C17—C18—C19—F3 | −179.6 (2) |
C7—C8—C9—C10 | −179.79 (17) | C17—C18—C19—C14 | −0.2 (4) |
C5—C4—C9—C8 | −1.3 (3) | C15—C14—C19—F3 | 179.00 (19) |
C3—C4—C9—C8 | 178.98 (17) | C13—C14—C19—F3 | −0.7 (3) |
C5—C4—C9—C10 | 179.36 (16) | C15—C14—C19—C18 | −0.4 (3) |
C3—C4—C9—C10 | −0.4 (2) | C13—C14—C19—C18 | 179.84 (19) |
C2—C1—C10—O1 | 178.07 (17) | O2—C12—N1—N2 | −0.3 (2) |
C2—C1—C10—C9 | −1.9 (3) | C11—C12—N1—N2 | 178.92 (17) |
C8—C9—C10—C1 | −177.39 (17) | O2—C13—N2—N1 | −0.1 (2) |
C4—C9—C10—C1 | 2.0 (2) | C14—C13—N2—N1 | 179.94 (17) |
C8—C9—C10—O1 | 2.7 (2) | C12—N1—N2—C13 | 0.2 (2) |
C4—C9—C10—O1 | −177.99 (14) | C1—C10—O1—C11 | −6.4 (3) |
O1—C11—C12—N1 | 9.7 (3) | C9—C10—O1—C11 | 173.59 (14) |
O1—C11—C12—O2 | −171.20 (14) | C12—C11—O1—C10 | −169.31 (14) |
N2—C13—C14—C15 | 172.59 (19) | N1—C12—O2—C13 | 0.18 (19) |
O2—C13—C14—C15 | −7.3 (3) | C11—C12—O2—C13 | −179.10 (14) |
N2—C13—C14—C19 | −7.7 (3) | N2—C13—O2—C12 | −0.01 (19) |
O2—C13—C14—C19 | 172.39 (16) | C14—C13—O2—C12 | 179.92 (14) |
C19—C14—C15—C16 | 0.7 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1···N2i | 0.93 | 2.61 | 3.449 (3) | 151 |
C5—H5···F2ii | 0.93 | 2.51 | 3.290 (3) | 141 |
Symmetry codes: (i) x+1, y, z; (ii) x+1, y+1, z−1. |
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1···N2i | 0.93 | 2.61 | 3.449 (3) | 151 |
C5—H5···F2ii | 0.93 | 2.51 | 3.290 (3) | 141 |
Symmetry codes: (i) x+1, y, z; (ii) x+1, y+1, z−1. |
Acknowledgements
MG thanks the management of Orchid Chemicals & Pharmaceuticals Ltd for their support. The authors thank the TBI X-ray facility, CAS in Crystallography and Biophysics, University of Madras, India, for the data collection.
References
Bhat, K. I., Sufeera, K. & Sunil Kumar, P. C. (2011). J. Young Pharm. 3, 310–314. CrossRef CAS PubMed Google Scholar
Bruker (2008). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Desai, N. C., Dodiya, A. M., Rajpara, K. M. & Rupala, Y. M. (2014). J. Saudi Chem. Soc. 18, 255–261. Web of Science CrossRef Google Scholar
Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849–854. Web of Science CrossRef CAS IUCr Journals Google Scholar
Katrin, B., Heinz, H. P. & Klaus, R. (2005). Arch. Pharm. Chem. Life Sci. 338, 78–86. Google Scholar
Shailaja, M., Anitha, M., Manujla, A. & Vittal, R. B. (2010). Indian J. Chem. Sect. B, 49, 1088–1097. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Spek, A. L. (2009). Acta Cryst. D65, 148–155. Web of Science CrossRef CAS IUCr Journals Google Scholar
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1,3,4-Oxadiazoles are a class of 5-membered heterocyclic compounds that have a wide range of biological activity as well as polymer and material science applications (Shailaja et al., 2010). Their derivatives are commonly used pharmacophores due to their metabolic profile and ability to engage in hydrogen bonding. Their pharmaceutical applications include use as anti-inflammatory, analgesic, anti-HIV, antimycobacterial agents, cathepsin K, tyrosinase and monoamine oxidase (MAO) inhibitors (Desai et al., 2014). They are also used as anticonvulsant, anticancer, antifungal and tuberculostatic drugs (Bhat et al.,2011). They also have analgesic, antiplatelet and antithrombotic activities (Katrin et al., 2005). Moreover, their amino derivatives are very commonly used as antimicrobial and germicidal agents.
In the title compound C19H11N2O2F3, Fig. 1, the oxadiazole, napthalene and trifluorophenyl rings are planar and the oxadiazole ring (C12/N1/N2/C13/O2) makes dihedral angles of 13.11 (1)° and 7.59 (1)° with the naphthalene (C1-C10) ring system and the trifluorophenyl (C14—C19) ring respectively. The fluorine F1, F2 and F3 atoms deviate from the benzene ring by -0.0017 Å, 0.0175 Å and -0.0163 Å respectively.
In the crystal C1–H1···N2 hydrogen bonds link molecules into chains along a while C5–H5···F2 contacts form additional chains along the ac diagonal. These contacts generate sheets of molecules approximately parallel to the (011) plane. Within these sheets groups of four molecules form R44(37) ring motifs.