organic compounds
(2E)-3-[4-(1H-Benzimidazol-2-ylmethoxy)phenyl]-1-(4-methoxyphenyl)prop-2-en-1-one
aDepartment of Physics, Faculty of Sciences, Erciyes University, 38039 Kayseri, Turkey, bDepartment of Studies in Chemistry, Mangalore University, Mangalagangotri 574 199, India, and cDepartment of Studies in Chemistry, University of Mysore, Manasangotri, Mysore 570 006, India
*Correspondence e-mail: akkurt@erciyes.edu.tr
In the title compound, C24H20N2O3, the mean plane of the benzimidazole unit makes dihedral angles of 79.88 (11) and 85.44 (12)° with the benzene and 4-methoxybenzene rings, respectively. The benzene and 4-methoxybenzene rings maske a dihedral angle of 16.10 (14)°. A pair of intermolecular N—H⋯O hydrogen bonds connects adjacent molecules into an inversion dimer, generating an R22(26) ring motif. The is further stabilized by C—H⋯π interactions.
Related literature
For the biological activity of benzimidazoles, see: Dhar (1981); Pujar et al. (1988); Bouwman et al. 1990); Dimmock et al. (1999); Satyanarayana et al. (2004); Madkour et al. (2006); Sarojini et al. (2006). For related structures, see: Jian et al. (2003); Jasinski et al. (2010); Odabaşoğlu et al. (2007). For the graph-set analysis of hydrogen bonding, see: Bernstein et al. (1995).
Experimental
Crystal data
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Refinement
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Data collection: CrystalClear (Rigaku/MSC, 2005); cell CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supporting information
10.1107/S1600536811012645/xu5184sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811012645/xu5184Isup2.hkl
A mixture of a 4-(1H-benzimidazol-2-ylmethoxy)benzaldehyde (2.52 g, 0.01 mole) and p-methoxy acetophenone (1.5 g, 0.01 mole) in 50 ml ethanolic sodium hydroxide was stirred at 278–283 K for 3 h, then maintained at room temperature for 24 h and poured into ice cold water. The precipitate that appeared after neutralization with dilute HCl was filtered off and recystallized from 1,4-dioxane. The single crystals were grown from DMF by slow evaporation method and yield of the compound was 75% (m.p.: 521 K).
H atoms were placed in geometrically idealized positions [N—H = 0.86 Å and C—H = 0.93–0.97 Å], and refined as riding with Uiso(H) = 1.2Ueq(C,N) for amine, methylene and aromatic H atoms or 1.5Ueq(C) for methyl H atoms.
Data collection: CrystalClear (Rigaku/MSC, 2005); cell
CrystalClear (Rigaku/MSC, 2005); data reduction: CrystalClear (Rigaku/MSC, 2005); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).C24H20N2O3 | Z = 2 |
Mr = 384.42 | F(000) = 404 |
Triclinic, P1 | Dx = 1.324 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 7.2244 (5) Å | Cell parameters from 1843 reflections |
b = 9.3201 (8) Å | θ = 2.4–26.4° |
c = 14.9422 (9) Å | µ = 0.09 mm−1 |
α = 98.449 (2)° | T = 294 K |
β = 99.183 (4)° | Block, pale yellow |
γ = 99.478 (4)° | 0.20 × 0.20 × 0.20 mm |
V = 964.01 (12) Å3 |
Rigaku R-AXIS RAPID-S diffractometer | 3952 independent reflections |
Radiation source: Sealed Tube | 2206 reflections with I > 2σ(I) |
Graphite Monochromator monochromator | Rint = 0.074 |
Detector resolution: 10.0000 pixels mm-1 | θmax = 26.4°, θmin = 2.3° |
dtprofit.ref scans | h = −9→9 |
Absorption correction: multi-scan (SORTAV; Blessing, 1995) | k = −11→10 |
Tmin = 0.983, Tmax = 0.983 | l = −18→18 |
20466 measured reflections |
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)] = 0.059 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.162 | H-atom parameters constrained |
S = 1.07 | w = 1/[σ2(Fo2) + (0.0423P)2 + 0.0726P] where P = (Fo2 + 2Fc2)/3 |
3952 reflections | (Δ/σ)max < 0.001 |
263 parameters | Δρmax = 0.19 e Å−3 |
0 restraints | Δρmin = −0.17 e Å−3 |
C24H20N2O3 | γ = 99.478 (4)° |
Mr = 384.42 | V = 964.01 (12) Å3 |
Triclinic, P1 | Z = 2 |
a = 7.2244 (5) Å | Mo Kα radiation |
b = 9.3201 (8) Å | µ = 0.09 mm−1 |
c = 14.9422 (9) Å | T = 294 K |
α = 98.449 (2)° | 0.20 × 0.20 × 0.20 mm |
β = 99.183 (4)° |
Rigaku R-AXIS RAPID-S diffractometer | 3952 independent reflections |
Absorption correction: multi-scan (SORTAV; Blessing, 1995) | 2206 reflections with I > 2σ(I) |
Tmin = 0.983, Tmax = 0.983 | Rint = 0.074 |
20466 measured reflections |
R[F2 > 2σ(F2)] = 0.059 | 0 restraints |
wR(F2) = 0.162 | H-atom parameters constrained |
S = 1.07 | Δρmax = 0.19 e Å−3 |
3952 reflections | Δρmin = −0.17 e Å−3 |
263 parameters |
Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All su's are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles |
Refinement. Refinement on F2 for ALL reflections except those flagged by the user for potential systematic errors. Weighted R-factors wR and all goodnesses of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The observed criterion of F2 > σ(F2) is used only for calculating -R-factor-obs 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 | 0.2640 (3) | 0.91719 (18) | 0.15238 (11) | 0.0644 (7) | |
O2 | 0.2171 (3) | 0.05475 (19) | −0.12143 (11) | 0.0687 (7) | |
O3 | 0.2682 (3) | −0.0583 (2) | −0.53944 (13) | 0.0787 (8) | |
N1 | 0.4160 (3) | 1.2698 (2) | 0.23251 (15) | 0.0660 (8) | |
N2 | 0.0984 (3) | 1.1935 (2) | 0.20220 (13) | 0.0620 (8) | |
C1 | 0.1351 (4) | 1.3169 (3) | 0.27147 (17) | 0.0617 (10) | |
C2 | 0.0158 (5) | 1.3923 (3) | 0.3165 (2) | 0.0805 (14) | |
C3 | 0.1061 (6) | 1.5136 (4) | 0.3826 (2) | 0.0951 (16) | |
C4 | 0.3040 (7) | 1.5591 (4) | 0.4022 (2) | 0.1014 (16) | |
C5 | 0.4185 (5) | 1.4847 (3) | 0.3566 (2) | 0.0846 (14) | |
C6 | 0.3318 (4) | 1.3610 (3) | 0.28934 (18) | 0.0639 (10) | |
C7 | 0.2708 (4) | 1.1720 (3) | 0.18325 (17) | 0.0574 (9) | |
C8 | 0.2866 (4) | 1.0467 (3) | 0.11237 (17) | 0.0654 (10) | |
C9 | 0.2628 (4) | 0.7851 (3) | 0.09807 (16) | 0.0524 (8) | |
C10 | 0.2442 (4) | 0.6636 (3) | 0.14123 (17) | 0.0599 (10) | |
C11 | 0.2379 (4) | 0.5253 (3) | 0.09186 (17) | 0.0604 (10) | |
C12 | 0.2522 (3) | 0.5040 (3) | −0.00069 (16) | 0.0529 (9) | |
C13 | 0.2741 (4) | 0.6283 (3) | −0.04203 (16) | 0.0573 (9) | |
C14 | 0.2791 (4) | 0.7682 (3) | 0.00605 (16) | 0.0584 (9) | |
C15 | 0.2423 (4) | 0.3536 (3) | −0.04834 (17) | 0.0594 (9) | |
C16 | 0.2578 (4) | 0.3078 (3) | −0.13370 (17) | 0.0590 (9) | |
C17 | 0.2407 (4) | 0.1501 (3) | −0.17049 (17) | 0.0555 (9) | |
C18 | 0.2517 (3) | 0.1048 (3) | −0.26800 (16) | 0.0539 (9) | |
C19 | 0.2228 (4) | 0.1918 (3) | −0.33441 (18) | 0.0656 (10) | |
C20 | 0.2258 (4) | 0.1433 (3) | −0.42634 (18) | 0.0671 (11) | |
C21 | 0.2600 (4) | 0.0023 (3) | −0.45189 (18) | 0.0600 (9) | |
C22 | 0.2893 (4) | −0.0862 (3) | −0.38702 (18) | 0.0640 (10) | |
C23 | 0.2863 (4) | −0.0362 (3) | −0.29682 (18) | 0.0596 (9) | |
C24 | 0.2382 (4) | 0.0284 (4) | −0.60934 (19) | 0.0868 (13) | |
HN2 | −0.01170 | 1.14090 | 0.17640 | 0.0740* | |
H2 | −0.11640 | 1.36280 | 0.30290 | 0.0970* | |
H3 | 0.03240 | 1.56680 | 0.41520 | 0.1140* | |
H4 | 0.35910 | 1.64170 | 0.44720 | 0.1210* | |
H5 | 0.55060 | 1.51550 | 0.36980 | 0.1020* | |
H8A | 0.18820 | 1.03580 | 0.05810 | 0.0780* | |
H8B | 0.41040 | 1.06430 | 0.09430 | 0.0780* | |
H10 | 0.23600 | 0.67510 | 0.20330 | 0.0720* | |
H11 | 0.22380 | 0.44390 | 0.12120 | 0.0730* | |
H13 | 0.28580 | 0.61730 | −0.10360 | 0.0690* | |
H14 | 0.29320 | 0.84990 | −0.02310 | 0.0700* | |
H15 | 0.22230 | 0.27990 | −0.01320 | 0.0710* | |
H16 | 0.28010 | 0.37670 | −0.17180 | 0.0710* | |
H19 | 0.20050 | 0.28640 | −0.31680 | 0.0790* | |
H20 | 0.20550 | 0.20380 | −0.46980 | 0.0800* | |
H22 | 0.31120 | −0.18090 | −0.40480 | 0.0770* | |
H23 | 0.30770 | −0.09710 | −0.25370 | 0.0720* | |
H24A | 0.11020 | 0.04680 | −0.61620 | 0.1300* | |
H24B | 0.25670 | −0.02380 | −0.66660 | 0.1300* | |
H24C | 0.32740 | 0.12080 | −0.59240 | 0.1300* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.1020 (15) | 0.0440 (10) | 0.0521 (10) | 0.0225 (9) | 0.0220 (10) | 0.0067 (8) |
O2 | 0.0988 (15) | 0.0499 (11) | 0.0553 (11) | 0.0118 (10) | 0.0127 (10) | 0.0072 (9) |
O3 | 0.0908 (15) | 0.0888 (15) | 0.0566 (11) | 0.0184 (12) | 0.0189 (10) | 0.0062 (11) |
N1 | 0.0812 (16) | 0.0496 (13) | 0.0661 (14) | 0.0156 (12) | 0.0116 (12) | 0.0062 (11) |
N2 | 0.0790 (16) | 0.0476 (13) | 0.0561 (13) | 0.0093 (11) | 0.0106 (11) | 0.0045 (10) |
C1 | 0.091 (2) | 0.0425 (15) | 0.0544 (16) | 0.0165 (14) | 0.0185 (15) | 0.0083 (12) |
C2 | 0.109 (3) | 0.0629 (19) | 0.079 (2) | 0.0315 (17) | 0.0324 (18) | 0.0101 (17) |
C3 | 0.147 (4) | 0.071 (2) | 0.079 (2) | 0.046 (2) | 0.040 (2) | 0.0025 (18) |
C4 | 0.145 (4) | 0.071 (2) | 0.078 (2) | 0.026 (2) | 0.010 (2) | −0.0136 (19) |
C5 | 0.108 (3) | 0.0615 (19) | 0.072 (2) | 0.0123 (18) | −0.0004 (18) | −0.0038 (16) |
C6 | 0.087 (2) | 0.0465 (16) | 0.0558 (16) | 0.0135 (14) | 0.0085 (15) | 0.0064 (13) |
C7 | 0.0799 (19) | 0.0430 (15) | 0.0524 (15) | 0.0162 (14) | 0.0154 (14) | 0.0107 (12) |
C8 | 0.098 (2) | 0.0464 (16) | 0.0559 (16) | 0.0187 (14) | 0.0212 (15) | 0.0095 (13) |
C9 | 0.0659 (16) | 0.0440 (14) | 0.0480 (14) | 0.0162 (12) | 0.0107 (12) | 0.0043 (11) |
C10 | 0.0854 (19) | 0.0510 (16) | 0.0483 (14) | 0.0188 (14) | 0.0196 (13) | 0.0108 (12) |
C11 | 0.0826 (19) | 0.0463 (15) | 0.0571 (16) | 0.0181 (13) | 0.0168 (14) | 0.0140 (12) |
C12 | 0.0614 (16) | 0.0461 (15) | 0.0503 (14) | 0.0128 (12) | 0.0089 (12) | 0.0051 (12) |
C13 | 0.0786 (18) | 0.0503 (15) | 0.0446 (14) | 0.0173 (13) | 0.0121 (12) | 0.0074 (12) |
C14 | 0.0809 (19) | 0.0470 (15) | 0.0504 (15) | 0.0172 (13) | 0.0139 (13) | 0.0119 (12) |
C15 | 0.0725 (18) | 0.0461 (15) | 0.0574 (16) | 0.0137 (13) | 0.0066 (13) | 0.0062 (12) |
C16 | 0.0737 (18) | 0.0472 (15) | 0.0542 (15) | 0.0136 (13) | 0.0088 (13) | 0.0047 (12) |
C17 | 0.0612 (16) | 0.0484 (15) | 0.0540 (15) | 0.0106 (12) | 0.0065 (12) | 0.0049 (13) |
C18 | 0.0619 (16) | 0.0450 (14) | 0.0518 (15) | 0.0118 (12) | 0.0059 (12) | 0.0026 (12) |
C19 | 0.086 (2) | 0.0477 (16) | 0.0610 (17) | 0.0143 (14) | 0.0112 (14) | 0.0039 (13) |
C20 | 0.080 (2) | 0.0628 (18) | 0.0590 (17) | 0.0132 (15) | 0.0098 (14) | 0.0166 (14) |
C21 | 0.0573 (16) | 0.0678 (18) | 0.0518 (15) | 0.0096 (14) | 0.0136 (12) | −0.0003 (14) |
C22 | 0.0735 (19) | 0.0558 (17) | 0.0622 (17) | 0.0178 (14) | 0.0155 (14) | 0.0003 (14) |
C23 | 0.0644 (17) | 0.0533 (16) | 0.0598 (16) | 0.0148 (13) | 0.0083 (13) | 0.0058 (13) |
C24 | 0.083 (2) | 0.116 (3) | 0.0620 (18) | 0.0126 (19) | 0.0149 (16) | 0.0243 (19) |
O1—C8 | 1.421 (3) | C17—C18 | 1.475 (3) |
O1—C9 | 1.369 (3) | C18—C23 | 1.397 (4) |
O2—C17 | 1.240 (3) | C18—C19 | 1.383 (4) |
O3—C21 | 1.361 (3) | C19—C20 | 1.386 (4) |
O3—C24 | 1.423 (4) | C20—C21 | 1.387 (4) |
N1—C6 | 1.392 (4) | C21—C22 | 1.375 (4) |
N1—C7 | 1.309 (3) | C22—C23 | 1.365 (4) |
N2—C1 | 1.388 (3) | C2—H2 | 0.9300 |
N2—C7 | 1.360 (4) | C3—H3 | 0.9300 |
N2—HN2 | 0.8600 | C4—H4 | 0.9300 |
C1—C2 | 1.391 (4) | C5—H5 | 0.9300 |
C1—C6 | 1.383 (4) | C8—H8A | 0.9700 |
C2—C3 | 1.379 (4) | C8—H8B | 0.9700 |
C3—C4 | 1.393 (7) | C10—H10 | 0.9300 |
C4—C5 | 1.364 (6) | C11—H11 | 0.9300 |
C5—C6 | 1.397 (4) | C13—H13 | 0.9300 |
C7—C8 | 1.489 (4) | C14—H14 | 0.9300 |
C9—C10 | 1.382 (4) | C15—H15 | 0.9300 |
C9—C14 | 1.387 (3) | C16—H16 | 0.9300 |
C10—C11 | 1.378 (4) | C19—H19 | 0.9300 |
C11—C12 | 1.391 (3) | C20—H20 | 0.9300 |
C12—C13 | 1.389 (4) | C22—H22 | 0.9300 |
C12—C15 | 1.461 (4) | C23—H23 | 0.9300 |
C13—C14 | 1.385 (4) | C24—H24A | 0.9600 |
C15—C16 | 1.313 (4) | C24—H24B | 0.9600 |
C16—C17 | 1.469 (4) | C24—H24C | 0.9600 |
C8—O1—C9 | 117.93 (19) | C20—C21—C22 | 120.3 (2) |
C21—O3—C24 | 117.8 (2) | C21—C22—C23 | 120.5 (3) |
C6—N1—C7 | 103.6 (2) | C18—C23—C22 | 121.2 (2) |
C1—N2—C7 | 106.5 (2) | C1—C2—H2 | 122.00 |
C1—N2—HN2 | 127.00 | C3—C2—H2 | 122.00 |
C7—N2—HN2 | 127.00 | C2—C3—H3 | 119.00 |
N2—C1—C2 | 132.4 (3) | C4—C3—H3 | 119.00 |
C2—C1—C6 | 122.9 (3) | C3—C4—H4 | 119.00 |
N2—C1—C6 | 104.6 (2) | C5—C4—H4 | 119.00 |
C1—C2—C3 | 115.8 (3) | C4—C5—H5 | 121.00 |
C2—C3—C4 | 122.2 (4) | C6—C5—H5 | 121.00 |
C3—C4—C5 | 121.2 (3) | O1—C8—H8A | 110.00 |
C4—C5—C6 | 118.1 (3) | O1—C8—H8B | 110.00 |
N1—C6—C1 | 111.2 (2) | C7—C8—H8A | 110.00 |
C1—C6—C5 | 119.8 (3) | C7—C8—H8B | 110.00 |
N1—C6—C5 | 129.0 (3) | H8A—C8—H8B | 109.00 |
N2—C7—C8 | 121.4 (2) | C9—C10—H10 | 120.00 |
N1—C7—C8 | 124.6 (3) | C11—C10—H10 | 120.00 |
N1—C7—N2 | 114.0 (2) | C10—C11—H11 | 119.00 |
O1—C8—C7 | 107.2 (2) | C12—C11—H11 | 119.00 |
C10—C9—C14 | 120.1 (2) | C12—C13—H13 | 119.00 |
O1—C9—C10 | 115.3 (2) | C14—C13—H13 | 119.00 |
O1—C9—C14 | 124.6 (2) | C9—C14—H14 | 120.00 |
C9—C10—C11 | 119.6 (2) | C13—C14—H14 | 120.00 |
C10—C11—C12 | 121.8 (3) | C12—C15—H15 | 115.00 |
C11—C12—C15 | 118.4 (2) | C16—C15—H15 | 115.00 |
C11—C12—C13 | 117.4 (2) | C15—C16—H16 | 119.00 |
C13—C12—C15 | 124.2 (2) | C17—C16—H16 | 119.00 |
C12—C13—C14 | 121.8 (2) | C18—C19—H19 | 119.00 |
C9—C14—C13 | 119.3 (2) | C20—C19—H19 | 119.00 |
C12—C15—C16 | 129.1 (3) | C19—C20—H20 | 121.00 |
C15—C16—C17 | 121.5 (3) | C21—C20—H20 | 121.00 |
O2—C17—C18 | 119.5 (2) | C21—C22—H22 | 120.00 |
C16—C17—C18 | 119.0 (2) | C23—C22—H22 | 120.00 |
O2—C17—C16 | 121.5 (2) | C18—C23—H23 | 119.00 |
C19—C18—C23 | 117.2 (2) | C22—C23—H23 | 119.00 |
C17—C18—C19 | 123.9 (2) | O3—C24—H24A | 109.00 |
C17—C18—C23 | 118.8 (2) | O3—C24—H24B | 109.00 |
C18—C19—C20 | 122.5 (3) | O3—C24—H24C | 109.00 |
C19—C20—C21 | 118.3 (2) | H24A—C24—H24B | 109.00 |
O3—C21—C22 | 115.5 (2) | H24A—C24—H24C | 109.00 |
O3—C21—C20 | 124.3 (2) | H24B—C24—H24C | 109.00 |
C8—O1—C9—C10 | 178.8 (3) | C14—C9—C10—C11 | −1.4 (4) |
C8—O1—C9—C14 | −1.1 (4) | O1—C9—C14—C13 | −179.4 (3) |
C9—O1—C8—C7 | 176.5 (2) | C9—C10—C11—C12 | 0.8 (4) |
C24—O3—C21—C22 | 179.8 (3) | C10—C11—C12—C15 | −179.4 (3) |
C24—O3—C21—C20 | −0.5 (4) | C10—C11—C12—C13 | 0.3 (4) |
C6—N1—C7—C8 | −178.8 (2) | C11—C12—C13—C14 | −0.9 (4) |
C6—N1—C7—N2 | 1.1 (3) | C13—C12—C15—C16 | 2.5 (5) |
C7—N1—C6—C5 | 179.9 (3) | C15—C12—C13—C14 | 178.8 (3) |
C7—N1—C6—C1 | −1.1 (3) | C11—C12—C15—C16 | −177.8 (3) |
C1—N2—C7—C8 | 179.2 (2) | C12—C13—C14—C9 | 0.3 (4) |
C7—N2—C1—C6 | −0.1 (3) | C12—C15—C16—C17 | −179.0 (3) |
C1—N2—C7—N1 | −0.7 (3) | C15—C16—C17—C18 | 177.6 (3) |
C7—N2—C1—C2 | 178.2 (3) | C15—C16—C17—O2 | −2.4 (5) |
N2—C1—C2—C3 | −179.5 (3) | O2—C17—C18—C19 | 160.7 (3) |
C6—C1—C2—C3 | −1.5 (4) | C16—C17—C18—C23 | 163.2 (3) |
N2—C1—C6—N1 | 0.8 (3) | O2—C17—C18—C23 | −16.9 (4) |
C2—C1—C6—C5 | 1.3 (4) | C16—C17—C18—C19 | −19.3 (4) |
N2—C1—C6—C5 | 179.8 (2) | C17—C18—C23—C22 | 177.0 (3) |
C2—C1—C6—N1 | −177.7 (2) | C19—C18—C23—C22 | −0.7 (4) |
C1—C2—C3—C4 | 0.9 (5) | C17—C18—C19—C20 | −177.1 (3) |
C2—C3—C4—C5 | −0.2 (5) | C23—C18—C19—C20 | 0.5 (4) |
C3—C4—C5—C6 | 0.0 (5) | C18—C19—C20—C21 | −0.3 (4) |
C4—C5—C6—N1 | 178.3 (3) | C19—C20—C21—C22 | 0.2 (4) |
C4—C5—C6—C1 | −0.6 (4) | C19—C20—C21—O3 | −179.5 (3) |
N1—C7—C8—O1 | 102.5 (3) | O3—C21—C22—C23 | 179.3 (3) |
N2—C7—C8—O1 | −77.4 (3) | C20—C21—C22—C23 | −0.4 (5) |
O1—C9—C10—C11 | 178.8 (3) | C21—C22—C23—C18 | 0.7 (4) |
C10—C9—C14—C13 | 0.8 (4) |
Cg1 and Cg4 are the centroids of the N1/N2/C1/C6/C7 and C18–C23 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—HN2···O2i | 0.86 | 2.12 | 2.927 (3) | 157 |
C11—H11···Cg1ii | 0.93 | 2.58 | 3.490 (3) | 165 |
C24—H24A···Cg4iii | 0.96 | 2.61 | 3.467 (3) | 149 |
Symmetry codes: (i) −x, −y+1, −z; (ii) x, y−1, z; (iii) −x, −y, −z−1. |
Experimental details
Crystal data | |
Chemical formula | C24H20N2O3 |
Mr | 384.42 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 294 |
a, b, c (Å) | 7.2244 (5), 9.3201 (8), 14.9422 (9) |
α, β, γ (°) | 98.449 (2), 99.183 (4), 99.478 (4) |
V (Å3) | 964.01 (12) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.20 × 0.20 × 0.20 |
Data collection | |
Diffractometer | Rigaku R-AXIS RAPID-S diffractometer |
Absorption correction | Multi-scan (SORTAV; Blessing, 1995) |
Tmin, Tmax | 0.983, 0.983 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 20466, 3952, 2206 |
Rint | 0.074 |
(sin θ/λ)max (Å−1) | 0.626 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.059, 0.162, 1.07 |
No. of reflections | 3952 |
No. of parameters | 263 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.19, −0.17 |
Computer programs: CrystalClear (Rigaku/MSC, 2005), SIR97 (Altomare et al., 1999), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997), WinGX (Farrugia, 1999).
Cg1 and Cg4 are the centroids of the N1/N2/C1/C6/C7 and C18–C23 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—HN2···O2i | 0.86 | 2.12 | 2.927 (3) | 157 |
C11—H11···Cg1ii | 0.93 | 2.58 | 3.490 (3) | 165 |
C24—H24A···Cg4iii | 0.96 | 2.61 | 3.467 (3) | 149 |
Symmetry codes: (i) −x, −y+1, −z; (ii) x, y−1, z; (iii) −x, −y, −z−1. |
Acknowledgements
ZB and MA thank the Unit of the Scientific Research Projects of Erciyes University, Turkey, for the research grant FBD-10–2949, and for support of the data collection at Atatürk University, Turkey. SS thanks Mangalore University and the UGC SAP for financial assistance for the purchase of chemicals. HSY thanks the UOM for sabbatical leave.
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.
The benzimidazole ring system and its related compounds play an important role in pharmaceutical and agricultural fields due to their broad spectrum of biological activities (Pujar et al., 1988, Bouwman et al., 1990). The synthesis of novel benzimidazole derivatives remains a main focus of medicinal research. Benzimidazoles are also useful as insecticides, acaricides, nematocides, herbicides and other plant-protective agents in the field of pest control (Madkour et al., 2006). In recent years, attention has increasingly been given to the synthesis of benzimidazole derivatives as a source of new antimicrobial agents. In addition, benzimidazole derivatives have played a crucial role in the theoretical development of heterocyclic chemistry and are also used extensively in organic synthesis. Chalcones constitute an important family of substances belonging to flavonoids, a large group of natural and synthetic products with interesting physicochemical properties, biological activity and structural characteristics. Chalcones are highly reactive substances of varied nature. They have been reported to possess many interesting pharmacological activities (Dhar, 1981) including anti-inflammatory, antimicrobial, antifungal, antioxidant, cytotoxic, antitumor and anticancer activities (Dimmock et al., 1999; Satyanarayana et al., 2004). Chalcones are also finding application as organic nonlinear optical materials (NLO) for their SHG conversion efficiency (Sarojini et al., 2006).
The crystal structures of some benzimidazole derivatives viz., 2-chloromethyl-1H-benzimidazole nitrate (Jian et al., 2003) and 5-methoxy-1H-benzo[d]imidazole-2(3H)-thione (Odabaşoğlu et al., 2007) have been reported. In continuation of our work on the synthesis of benzimidazole derivatives (Jasinski et al., 2010) and in view of the importance of benzimidazoles, the title compound (I) is synthesized and its crystal structure is reported here.
In the title compound (I), (Fig. 1). the dihedral angles between the least squares planes of the benzimidazole (N1/N2/C1–C7) and the benzene (C9–C14) and 4-methoxybenzene (C18–C23) rings are79.88 (11)° and 85.44 (12)°, respectively. The benzene and 4-methoxybenzene rings form a dihedral angle of 16.10 (14)° with each other.
Molecule conformation of (I) is stabilized by one weak intramolecular C15—H15···O2 interaction (Table 1). Two molecules are connected by N—H···O hydrogen bonds into an inversion dimer, forming an R22(26) ring motif (Bernstein et al., 1995; Table 1, Fig. 2). Furthermore, crystal packing is stabilized by C—H···π interactions (Table 1), involving N1/N2/C1/C6/C7 (centroid Cg1) and C18–C23 (centroid Cg4) rings.