organic compounds
(E)-N′-(4-Methoxybenzylidene)-2-(2-methyl-4-nitro-1H-imidazol-1-yl)acetohydrazide
aX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, bDepartment of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia, cDepartment of Studies in Chemistry, Mangalore University, Mangalagangotri, Mangalore 574 199, India, and dDepartment of Chemistry, Canara Engineering College, Mangalore 574 199, India
*Correspondence e-mail: hkfun@usm.my
In the title compound, C14H15N5O4, the central –C=N—N—C(=O)—C– bridge is nearly planar [maximum deviation = 0.037 (1) Å] and forms dihedral angles of 7.37 (9) and 73.33 (5)°, respectively, with the benzene and imidazole rings. The dihedral angle between the benzene and imidazole rings is 66.08 (9)°. The methoxy and nitro groups are nearly coplanar with the benzene and imidazole rings, respectively, with a C—O—C—C torsion angle of 5.9 (2)° and an O—N—C—C angle of −0.2 (2)°. In the crystal, molecules are linked by a pair of N—H⋯O hydrogen bonds with an R22(8) ring motif, forming an inversion dimer. The dimers are further interconnected by C—H⋯O hydrogen bonds into a sheet parallel to the (111) plane. A C—H⋯π interaction is also observed between the sheets.
Related literature
For applications and biological activities of imidazole derivatives, see: Frank & Kalluraya (2005); Dobler (2003); Gauthier & Duceppe (1984); Khan & Nandan (1997); Khabnadideh et al. (2003). For the stability of the temperature controller used for data collection, see: Cosier & Glazer (1986). For hydrogen-bond motifs, see: Bernstein et al. (1995).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2009); cell SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009).
Supporting information
https://doi.org/10.1107/S1600536812039621/is5195sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536812039621/is5195Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536812039621/is5195Isup3.cml
The title compound was synthesized by refluxing a mixture of 2-(2-methyl-4-nitro-1H-imidazol-1-yl)acetohydrazide (0.1 mol) and 1-(4-methoxyphenyl)ethanone (0.1 mol) in glacial acetic acid for 1 h. On cooling the reaction mixture to room temperature and evaporation of the solvent under reduced pressure, the solid that separated out was filtered, washed with water and dried. Yellow plate-shaped crystals were grown from ethanol-dioxane mixture by slow evaporation method (m.p. 505 K).
The N-bound H atom was located in a difference Fourier map and refined freely [N2—H1N2 = 0.88 (2) Å]. The remaining H atoms were positioned geometrically (C—H = 0.95, 0.98 and 0.99 Å) and refined using a riding model with Uiso(H) = 1.2 or 1.5Ueq(C). A rotating group model was applied to the methyl group.
Various applications of imidazoles are listed in the literature with functions as widely divergent as dyestuffs, catalysts, polymerizing agents, drugs, herbicides and fungicides (Frank & Kalluraya, 2005). Imidazole derivatives show promising antiallergic (Gauthier & Duceppe, 1984), anti-inflammatory, analgesic (Khan & Nandan, 1997) and antibacterial (Khabnadideh et al., 2003) activities. Imidazole derivatives are also useful for the treatment of rheumatoid arthritis and inflammatory diseases (Dobler, 2003). In view of the apparent importance of imidazole derivatives as potential pharmacological agents, and in continuation of our research work in the field of biologically active imidazole derivatives, we report herein the
of the title compound.The ═N1—N2—C9(═O2)—C10— bridge is nearly planar [maximum deviation = 0.037 (1) Å at atom N2] and forms dihedral angles of 7.37 (9) and 73.33 (5)° with the benzene and imidazole rings, respectively. The methoxy (O1/C1) and nitro (O3/O4/N5) groups are coplanar with the benzene ring and the imidazole ring, respectively, as indicated by torsion angles C1—O1—C2—C3 [5.9 (2)°], O4—N5—C12—C11 [-0.2 (2)°] and O3—N5—C12—N4 [0.0 (2)°].
of the title compound is shown in Fig. 1. The benzene (C2–C7) and imidazole (N3/C11/C12/N4/C13) rings make a dihedral angle of 66.08 (9)° with each other. The —C8In the crystal (Fig. 2), molecules are linked by a pair of intermolecular N2—H1N2···O2 hydrogen bonds into an inversion dimer with an R22(8) ring motif (Bernstein et al., 1995). The dimers are further interconnected by C11—H11A···O4 and C14—H14A···O1 hydrogen bonds into a sheet structure parallel to the (111) plane. The crystal is further stabilized by a C—H···π interaction (Table 1), involving Cg1 which is the centroid of the N3/C11/C12/N4/C13 ring.
For applications and biological activities of imidazole derivatives, see: Frank & Kalluraya (2005); Dobler (2003); Gauthier & Duceppe (1984); Khan & Nandan (1997); Khabnadideh et al. (2003). For the stability of the temperature controller used for data collection, see: Cosier & Glazer (1986). For hydrogen-bond motifs, see: Bernstein et al. (1995).
Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).Fig. 1. The molecular structure of the title compound with atom labels and 50% probability displacement ellipsoids. | |
Fig. 2. The crystal packing of the title compound viewed along the [101] axis. The dashed lines represent the hydrogen bonds. For clarity sake, hydrogen atoms not involved in hydrogen bonding have been omitted. |
C14H15N5O4 | Z = 2 |
Mr = 317.31 | F(000) = 332 |
Triclinic, P1 | Dx = 1.430 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 4.3366 (1) Å | Cell parameters from 5229 reflections |
b = 12.9773 (3) Å | θ = 2.3–30.0° |
c = 13.2138 (3) Å | µ = 0.11 mm−1 |
α = 84.919 (2)° | T = 100 K |
β = 87.353 (2)° | Plate, yellow |
γ = 84.611 (1)° | 0.51 × 0.19 × 0.11 mm |
V = 736.90 (3) Å3 |
Bruker SMART APEXII CCD area-detector diffractometer | 4303 independent reflections |
Radiation source: fine-focus sealed tube | 3252 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.035 |
φ and ω scans | θmax = 30.1°, θmin = 1.6° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −6→6 |
Tmin = 0.947, Tmax = 0.988 | k = −18→18 |
15663 measured reflections | l = −18→18 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.053 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.131 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0518P)2 + 0.496P] where P = (Fo2 + 2Fc2)/3 |
4303 reflections | (Δ/σ)max < 0.001 |
214 parameters | Δρmax = 0.34 e Å−3 |
0 restraints | Δρmin = −0.31 e Å−3 |
C14H15N5O4 | γ = 84.611 (1)° |
Mr = 317.31 | V = 736.90 (3) Å3 |
Triclinic, P1 | Z = 2 |
a = 4.3366 (1) Å | Mo Kα radiation |
b = 12.9773 (3) Å | µ = 0.11 mm−1 |
c = 13.2138 (3) Å | T = 100 K |
α = 84.919 (2)° | 0.51 × 0.19 × 0.11 mm |
β = 87.353 (2)° |
Bruker SMART APEXII CCD area-detector diffractometer | 4303 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 3252 reflections with I > 2σ(I) |
Tmin = 0.947, Tmax = 0.988 | Rint = 0.035 |
15663 measured reflections |
R[F2 > 2σ(F2)] = 0.053 | 0 restraints |
wR(F2) = 0.131 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | Δρmax = 0.34 e Å−3 |
4303 reflections | Δρmin = −0.31 e Å−3 |
214 parameters |
Experimental. The crystal was placed in the cold stream of an Oxford Cryosystems Cobra open-flow nitrogen cryostat (Cosier & Glazer, 1986) operating at 100.0 (1) K. |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s 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 > σ(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 | ||
O1 | −0.4105 (3) | 0.76565 (9) | 1.00477 (9) | 0.0228 (3) | |
O2 | 1.0816 (3) | 0.88398 (8) | 0.42690 (8) | 0.0168 (2) | |
O3 | 1.4713 (3) | 0.47331 (9) | 0.20227 (9) | 0.0237 (3) | |
O4 | 1.5848 (3) | 0.44149 (9) | 0.36131 (9) | 0.0256 (3) | |
N1 | 0.5223 (3) | 0.85992 (9) | 0.62488 (10) | 0.0157 (3) | |
N2 | 0.7370 (3) | 0.90552 (10) | 0.55866 (10) | 0.0151 (3) | |
N3 | 0.9336 (3) | 0.68443 (9) | 0.40406 (10) | 0.0156 (3) | |
N4 | 1.0435 (3) | 0.63333 (9) | 0.24863 (10) | 0.0164 (3) | |
N5 | 1.4374 (3) | 0.49076 (9) | 0.29156 (10) | 0.0175 (3) | |
C1 | −0.4567 (4) | 0.65710 (13) | 1.02022 (13) | 0.0243 (4) | |
H1A | −0.6064 | 0.6458 | 1.0771 | 0.036* | |
H1B | −0.2590 | 0.6171 | 1.0357 | 0.036* | |
H1C | −0.5361 | 0.6344 | 0.9584 | 0.036* | |
C2 | −0.2144 (4) | 0.79626 (12) | 0.92693 (12) | 0.0178 (3) | |
C3 | −0.0763 (4) | 0.73140 (12) | 0.85563 (12) | 0.0181 (3) | |
H3A | −0.1178 | 0.6605 | 0.8593 | 0.022* | |
C4 | 0.1213 (4) | 0.77065 (11) | 0.77954 (12) | 0.0164 (3) | |
H4A | 0.2139 | 0.7261 | 0.7311 | 0.020* | |
C5 | 0.1872 (4) | 0.87453 (11) | 0.77251 (11) | 0.0149 (3) | |
C6 | 0.0467 (4) | 0.93826 (12) | 0.84475 (12) | 0.0193 (3) | |
H6A | 0.0893 | 1.0090 | 0.8415 | 0.023* | |
C7 | −0.1527 (4) | 0.90054 (12) | 0.92063 (12) | 0.0204 (3) | |
H7A | −0.2477 | 0.9453 | 0.9685 | 0.025* | |
C8 | 0.4071 (4) | 0.91518 (11) | 0.69559 (12) | 0.0155 (3) | |
H8A | 0.4658 | 0.9836 | 0.6979 | 0.019* | |
C9 | 0.8830 (4) | 0.84969 (11) | 0.48733 (11) | 0.0141 (3) | |
C10 | 0.7805 (4) | 0.74033 (11) | 0.48597 (12) | 0.0172 (3) | |
H10A | 0.8265 | 0.7006 | 0.5518 | 0.021* | |
H10B | 0.5534 | 0.7452 | 0.4782 | 0.021* | |
C11 | 1.1547 (4) | 0.60235 (11) | 0.41596 (12) | 0.0162 (3) | |
H11A | 1.2447 | 0.5722 | 0.4771 | 0.019* | |
C12 | 1.2159 (4) | 0.57381 (11) | 0.31963 (12) | 0.0156 (3) | |
C13 | 0.8741 (4) | 0.70062 (11) | 0.30221 (12) | 0.0156 (3) | |
C14 | 0.6539 (4) | 0.78659 (12) | 0.26004 (13) | 0.0197 (3) | |
H14A | 0.6200 | 0.7773 | 0.1887 | 0.030* | |
H14B | 0.7403 | 0.8531 | 0.2645 | 0.030* | |
H14C | 0.4563 | 0.7861 | 0.2991 | 0.030* | |
H1N2 | 0.792 (5) | 0.9681 (18) | 0.5660 (16) | 0.031 (6)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0275 (7) | 0.0223 (6) | 0.0192 (6) | −0.0081 (5) | 0.0062 (5) | −0.0019 (4) |
O2 | 0.0186 (6) | 0.0126 (5) | 0.0197 (5) | −0.0047 (4) | 0.0036 (4) | −0.0028 (4) |
O3 | 0.0346 (7) | 0.0162 (5) | 0.0199 (6) | 0.0018 (5) | 0.0016 (5) | −0.0055 (4) |
O4 | 0.0341 (7) | 0.0176 (5) | 0.0242 (6) | 0.0067 (5) | −0.0071 (5) | −0.0021 (5) |
N1 | 0.0165 (6) | 0.0127 (5) | 0.0178 (6) | −0.0019 (5) | 0.0009 (5) | −0.0012 (5) |
N2 | 0.0173 (7) | 0.0104 (5) | 0.0181 (6) | −0.0040 (5) | 0.0031 (5) | −0.0033 (5) |
N3 | 0.0200 (7) | 0.0099 (5) | 0.0174 (6) | −0.0032 (5) | 0.0016 (5) | −0.0034 (4) |
N4 | 0.0195 (7) | 0.0113 (5) | 0.0185 (6) | −0.0022 (5) | 0.0003 (5) | −0.0023 (5) |
N5 | 0.0228 (7) | 0.0096 (5) | 0.0204 (7) | −0.0017 (5) | −0.0009 (5) | −0.0025 (5) |
C1 | 0.0275 (9) | 0.0232 (8) | 0.0224 (8) | −0.0092 (7) | 0.0021 (7) | 0.0024 (6) |
C2 | 0.0183 (8) | 0.0197 (7) | 0.0155 (7) | −0.0027 (6) | 0.0003 (6) | −0.0007 (6) |
C3 | 0.0219 (8) | 0.0135 (6) | 0.0191 (7) | −0.0031 (6) | −0.0011 (6) | −0.0009 (5) |
C4 | 0.0175 (8) | 0.0140 (6) | 0.0179 (7) | 0.0000 (6) | 0.0002 (6) | −0.0034 (5) |
C5 | 0.0151 (7) | 0.0128 (6) | 0.0168 (7) | −0.0007 (6) | −0.0005 (6) | −0.0020 (5) |
C6 | 0.0232 (8) | 0.0131 (6) | 0.0221 (8) | −0.0024 (6) | 0.0008 (7) | −0.0045 (6) |
C7 | 0.0231 (8) | 0.0182 (7) | 0.0204 (8) | −0.0022 (6) | 0.0040 (7) | −0.0065 (6) |
C8 | 0.0173 (7) | 0.0112 (6) | 0.0182 (7) | −0.0009 (6) | −0.0017 (6) | −0.0021 (5) |
C9 | 0.0153 (7) | 0.0111 (6) | 0.0163 (7) | −0.0014 (5) | −0.0019 (6) | −0.0022 (5) |
C10 | 0.0223 (8) | 0.0128 (6) | 0.0173 (7) | −0.0046 (6) | 0.0050 (6) | −0.0047 (5) |
C11 | 0.0205 (8) | 0.0101 (6) | 0.0185 (7) | −0.0034 (6) | −0.0003 (6) | −0.0015 (5) |
C12 | 0.0178 (8) | 0.0102 (6) | 0.0190 (7) | −0.0023 (6) | 0.0009 (6) | −0.0017 (5) |
C13 | 0.0188 (8) | 0.0096 (6) | 0.0191 (7) | −0.0035 (6) | 0.0002 (6) | −0.0029 (5) |
C14 | 0.0229 (8) | 0.0130 (6) | 0.0229 (8) | 0.0016 (6) | −0.0023 (7) | −0.0025 (6) |
O1—C2 | 1.3599 (19) | C3—C4 | 1.384 (2) |
O1—C1 | 1.437 (2) | C3—H3A | 0.9500 |
O2—C9 | 1.2340 (18) | C4—C5 | 1.398 (2) |
O3—N5 | 1.2206 (17) | C4—H4A | 0.9500 |
O4—N5 | 1.2410 (18) | C5—C6 | 1.399 (2) |
N1—C8 | 1.2825 (19) | C5—C8 | 1.460 (2) |
N1—N2 | 1.3853 (17) | C6—C7 | 1.380 (2) |
N2—C9 | 1.3394 (19) | C6—H6A | 0.9500 |
N2—H1N2 | 0.88 (2) | C7—H7A | 0.9500 |
N3—C11 | 1.368 (2) | C8—H8A | 0.9500 |
N3—C13 | 1.376 (2) | C9—C10 | 1.5284 (19) |
N3—C10 | 1.4565 (19) | C10—H10A | 0.9900 |
N4—C13 | 1.3208 (19) | C10—H10B | 0.9900 |
N4—C12 | 1.365 (2) | C11—C12 | 1.364 (2) |
N5—C12 | 1.4371 (19) | C11—H11A | 0.9500 |
C1—H1A | 0.9800 | C13—C14 | 1.485 (2) |
C1—H1B | 0.9800 | C14—H14A | 0.9800 |
C1—H1C | 0.9800 | C14—H14B | 0.9800 |
C2—C3 | 1.396 (2) | C14—H14C | 0.9800 |
C2—C7 | 1.399 (2) | ||
C2—O1—C1 | 117.64 (13) | C5—C6—H6A | 119.3 |
C8—N1—N2 | 115.67 (12) | C6—C7—C2 | 119.82 (14) |
C9—N2—N1 | 118.95 (12) | C6—C7—H7A | 120.1 |
C9—N2—H1N2 | 119.3 (14) | C2—C7—H7A | 120.1 |
N1—N2—H1N2 | 121.5 (14) | N1—C8—C5 | 121.01 (13) |
C11—N3—C13 | 107.62 (12) | N1—C8—H8A | 119.5 |
C11—N3—C10 | 125.49 (13) | C5—C8—H8A | 119.5 |
C13—N3—C10 | 126.83 (13) | O2—C9—N2 | 122.86 (13) |
C13—N4—C12 | 103.74 (13) | O2—C9—C10 | 122.67 (13) |
O3—N5—O4 | 124.20 (14) | N2—C9—C10 | 114.47 (13) |
O3—N5—C12 | 119.08 (13) | N3—C10—C9 | 112.56 (12) |
O4—N5—C12 | 116.72 (13) | N3—C10—H10A | 109.1 |
O1—C1—H1A | 109.5 | C9—C10—H10A | 109.1 |
O1—C1—H1B | 109.5 | N3—C10—H10B | 109.1 |
H1A—C1—H1B | 109.5 | C9—C10—H10B | 109.1 |
O1—C1—H1C | 109.5 | H10A—C10—H10B | 107.8 |
H1A—C1—H1C | 109.5 | C12—C11—N3 | 103.93 (14) |
H1B—C1—H1C | 109.5 | C12—C11—H11A | 128.0 |
O1—C2—C3 | 124.58 (14) | N3—C11—H11A | 128.0 |
O1—C2—C7 | 115.76 (14) | C11—C12—N4 | 113.11 (14) |
C3—C2—C7 | 119.66 (14) | C11—C12—N5 | 125.50 (14) |
C4—C3—C2 | 119.79 (14) | N4—C12—N5 | 121.40 (13) |
C4—C3—H3A | 120.1 | N4—C13—N3 | 111.59 (14) |
C2—C3—H3A | 120.1 | N4—C13—C14 | 125.55 (14) |
C3—C4—C5 | 121.31 (14) | N3—C13—C14 | 122.82 (13) |
C3—C4—H4A | 119.3 | C13—C14—H14A | 109.5 |
C5—C4—H4A | 119.3 | C13—C14—H14B | 109.5 |
C4—C5—C6 | 118.03 (14) | H14A—C14—H14B | 109.5 |
C4—C5—C8 | 121.61 (13) | C13—C14—H14C | 109.5 |
C6—C5—C8 | 120.30 (13) | H14A—C14—H14C | 109.5 |
C7—C6—C5 | 121.39 (14) | H14B—C14—H14C | 109.5 |
C7—C6—H6A | 119.3 | ||
C8—N1—N2—C9 | 175.35 (14) | C13—N3—C10—C9 | −74.30 (19) |
C1—O1—C2—C3 | 5.9 (2) | O2—C9—C10—N3 | −2.2 (2) |
C1—O1—C2—C7 | −174.01 (15) | N2—C9—C10—N3 | 177.07 (14) |
O1—C2—C3—C4 | −179.73 (15) | C13—N3—C11—C12 | 0.07 (16) |
C7—C2—C3—C4 | 0.2 (3) | C10—N3—C11—C12 | 177.30 (13) |
C2—C3—C4—C5 | 0.2 (2) | N3—C11—C12—N4 | −0.37 (17) |
C3—C4—C5—C6 | −0.2 (2) | N3—C11—C12—N5 | 179.33 (13) |
C3—C4—C5—C8 | 176.91 (15) | C13—N4—C12—C11 | 0.52 (17) |
C4—C5—C6—C7 | −0.3 (2) | C13—N4—C12—N5 | −179.19 (13) |
C8—C5—C6—C7 | −177.45 (16) | O3—N5—C12—C11 | −179.70 (15) |
C5—C6—C7—C2 | 0.8 (3) | O4—N5—C12—C11 | −0.2 (2) |
O1—C2—C7—C6 | 179.25 (16) | O3—N5—C12—N4 | 0.0 (2) |
C3—C2—C7—C6 | −0.7 (3) | O4—N5—C12—N4 | 179.49 (14) |
N2—N1—C8—C5 | −177.68 (14) | C12—N4—C13—N3 | −0.46 (16) |
C4—C5—C8—N1 | 7.6 (2) | C12—N4—C13—C14 | 177.23 (15) |
C6—C5—C8—N1 | −175.37 (15) | C11—N3—C13—N4 | 0.26 (17) |
N1—N2—C9—O2 | −178.50 (14) | C10—N3—C13—N4 | −176.93 (13) |
N1—N2—C9—C10 | 2.3 (2) | C11—N3—C13—C14 | −177.51 (14) |
C11—N3—C10—C9 | 108.99 (16) | C10—N3—C13—C14 | 5.3 (2) |
Cg1 is the centroid of the N3/C11/C12/N4/C13 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H1N2···O2i | 0.88 (2) | 2.06 (2) | 2.9372 (17) | 176 (2) |
C11—H11A···O4ii | 0.95 | 2.28 | 3.186 (2) | 160 |
C14—H14A···O1iii | 0.98 | 2.46 | 3.434 (2) | 173 |
C14—H14C···Cg1iv | 0.98 | 2.74 | 3.4747 (18) | 133 |
Symmetry codes: (i) −x+2, −y+2, −z+1; (ii) −x+3, −y+1, −z+1; (iii) x+1, y, z−1; (iv) x−1, y, z. |
Experimental details
Crystal data | |
Chemical formula | C14H15N5O4 |
Mr | 317.31 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 100 |
a, b, c (Å) | 4.3366 (1), 12.9773 (3), 13.2138 (3) |
α, β, γ (°) | 84.919 (2), 87.353 (2), 84.611 (1) |
V (Å3) | 736.90 (3) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.11 |
Crystal size (mm) | 0.51 × 0.19 × 0.11 |
Data collection | |
Diffractometer | Bruker SMART APEXII CCD area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.947, 0.988 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 15663, 4303, 3252 |
Rint | 0.035 |
(sin θ/λ)max (Å−1) | 0.706 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.053, 0.131, 1.03 |
No. of reflections | 4303 |
No. of parameters | 214 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.34, −0.31 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
Cg1 is the centroid of the N3/C11/C12/N4/C13 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H1N2···O2i | 0.88 (2) | 2.06 (2) | 2.9372 (17) | 176 (2) |
C11—H11A···O4ii | 0.95 | 2.28 | 3.186 (2) | 160 |
C14—H14A···O1iii | 0.98 | 2.46 | 3.434 (2) | 173 |
C14—H14C···Cg1iv | 0.98 | 2.74 | 3.4747 (18) | 133 |
Symmetry codes: (i) −x+2, −y+2, −z+1; (ii) −x+3, −y+1, −z+1; (iii) x+1, y, z−1; (iv) x−1, y, z. |
Acknowledgements
HKF and TSC thank Universiti Sains Malaysia (USM) for a Research University Grant (1001/PFIZIK/811160). TSC thanks the Malaysian government and USM for the award of a research fellowship.
References
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Various applications of imidazoles are listed in the literature with functions as widely divergent as dyestuffs, catalysts, polymerizing agents, drugs, herbicides and fungicides (Frank & Kalluraya, 2005). Imidazole derivatives show promising antiallergic (Gauthier & Duceppe, 1984), anti-inflammatory, analgesic (Khan & Nandan, 1997) and antibacterial (Khabnadideh et al., 2003) activities. Imidazole derivatives are also useful for the treatment of rheumatoid arthritis and inflammatory diseases (Dobler, 2003). In view of the apparent importance of imidazole derivatives as potential pharmacological agents, and in continuation of our research work in the field of biologically active imidazole derivatives, we report herein the crystal structure of the title compound.
The asymmetric unit of the title compound is shown in Fig. 1. The benzene (C2–C7) and imidazole (N3/C11/C12/N4/C13) rings make a dihedral angle of 66.08 (9)° with each other. The —C8═N1—N2—C9(═O2)—C10— bridge is nearly planar [maximum deviation = 0.037 (1) Å at atom N2] and forms dihedral angles of 7.37 (9) and 73.33 (5)° with the benzene and imidazole rings, respectively. The methoxy (O1/C1) and nitro (O3/O4/N5) groups are coplanar with the benzene ring and the imidazole ring, respectively, as indicated by torsion angles C1—O1—C2—C3 [5.9 (2)°], O4—N5—C12—C11 [-0.2 (2)°] and O3—N5—C12—N4 [0.0 (2)°].
In the crystal (Fig. 2), molecules are linked by a pair of intermolecular N2—H1N2···O2 hydrogen bonds into an inversion dimer with an R22(8) ring motif (Bernstein et al., 1995). The dimers are further interconnected by C11—H11A···O4 and C14—H14A···O1 hydrogen bonds into a sheet structure parallel to the (111) plane. The crystal is further stabilized by a C—H···π interaction (Table 1), involving Cg1 which is the centroid of the N3/C11/C12/N4/C13 ring.