organic compounds
2-{[2-(Pyridin-4-yl)-1H-benzimidazol-1-yl]methyl}phenol
aCollege of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, People's Republic of China, and bDepartment of Chemistry, Faculty of Education, University of Khartoum, Sudan
*Correspondence e-mail: jcliu8@nwnu.edu.cn
In the title compound, C19H15N3O, the benzimidazole ring system makes dihedral angles of 44.36 (7) and 75.67 (7)° with the pyridine and benzene rings, respectively. In the crystal, phenolic O—H⋯N hydrogen bonds to benzimidazole N-atom acceptors give rise to a chain extending along [011].
Related literature
For applications of benzimidazole derivatives as ligands, see: Janiak (2000); Kühler et al. (2002); Li et al. (2007); Carcanague et al. (2002); Yang et al. (2006). For the synthesis of the title compound, see: Fellah et al. (2010). For the structure of a similar compound, see: Kitazume & Ishikawa (1974).
Experimental
Crystal data
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Data collection: CrysAlis PRO (Agilent, 2012); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SUPERFLIP (Palatinus & Chapuis, 2007); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: OLEX2 (Dolomanov et al., 2009); software used to prepare material for publication: OLEX2.
Supporting information
https://doi.org/10.1107/S1600536813009458/zs2254sup1.cif
contains datablocks globalk, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536813009458/zs2254Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536813009458/zs2254Isup3.cml
2-[2-(Pyridin-4-yl)-1H-benzimidazol-1-ylmethyl]phenol was synthesized according to a modification of a previously reported procedure (Fellah et al., 2010). To a solution of o-phenylenediamine (2.16 g, 20 mmol) in ethanol (20 ml), 2-hydroxybenzaldehyde (1.22 g, 10 mmol) dissolved in ethanol (10 ml) was added dropwise. The mixture was stirred at room temperature for 8 h. A yellow precipitate formed and was isolated by filtration. The crude product,[(E)-2((2-aminophenylimino)methyl)], was then crystallized from ethanol and a solution of this product (2.12 g, 10 mmol) and pyridine-4-carbaldehyde (1.07 g, 10 mmol) in ethanol (50 ml) was heated for 10 h under reflux. The reaction mixture was cooled, and a white precipitate of the crude title compound formed and was filtered off (yield 71 wt%). This product was then recrystallized from an aqueous methanol solution (1:1 v/v). Colorless single block crystals of the title compound suitable for X-ray analysis were obtained.
The phenolic H atom was positioned and refined as a freely rotating O—H bond, with a fixed O—H bond length of 0.82 Å and with Uiso(H) = 1.5Ueq(O). Other H atoms were included in calculated positions and refined using a riding-model approximation, with C—H = 0.93 or 0.97 Å for aromatic and methylene H atoms, respectively, and with Uiso(H) = 1.2Ueq(C).
Supramolecular chemistry based on coordination compounds is a vast area of current research. Benzimidazole derivatives have attracted the attention of many synthetic chemists, due not only to their useful biological activities but also to their strong coordinating abilities as multidentate ligands (Kühler et al., 2002; Carcanague et al., 2002; Yang et al., 2006; Li et al., 2007). In our studies, we synthesized the substituted benzimidazole ligand 2-[2-(pyridin-4-yl)-1H-benzimidazol-1-ylmethyl]phenol, C19H15N3O, derived from the transformation of an unsymmetrical Schiff base and the structure is reported herein.
Within the ligand, the pyridine group is rigidly linked to the central C atom of the benzimidazole group, and the phenol ring is attached via a methylene group to an N-atom (Kitazume & Ishikawa, 1974). The dihedral angles between the pyridine and phenyl rings and the benzimidazole ring are 44.36 (7) and 75.67 (7)°, respectively. These deviations from planarity, in part, may be influenced by intermolecular phenolic O—H···N hydrogen bonds to benzimidazole N-atom acceptors (Table 1), giving one-dimensional chains extending along [110] (Fig. 2). In addition, the π–π stacking interactions involving the pyridine rings, with the shortest centroid to centroid distance between these planes of 3.9624 (10)Å]. This value is within the upper limit of the common range for π–π interactions (Janiak, 2000).
is stabilized by weak face-to-faceFor applications of benzimidazole derivatives as ligands, see: Janiak (2000); Kühler et al. (2002); Li et al. (2007); Carcanague et al. (2002); Yang et al. (2006). For the synthesis of the title compound, see: Fellah et al. (2010). For the structure of a similar compound, see: Kitazume & Ishikawa (1974).
Data collection: CrysAlis PRO (Agilent, 2012); cell
CrysAlis PRO (Agilent, 2012); data reduction: CrysAlis PRO (Agilent, 2012); program(s) used to solve structure: SUPERFLIP (Palatinus & Chapuis, 2007); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: OLEX2 (Dolomanov et al., 2009); software used to prepare material for publication: OLEX2 (Dolomanov et al., 2009).C19H15N3O | F(000) = 1264 |
Mr = 301.34 | Dx = 1.362 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.7107 Å |
a = 16.1886 (7) Å | Cell parameters from 2313 reflections |
b = 8.4863 (4) Å | θ = 3.1–28.4° |
c = 21.4316 (10) Å | µ = 0.09 mm−1 |
β = 93.756 (4)° | T = 291 K |
V = 2938.0 (2) Å3 | Block, colourless |
Z = 8 | 0.36 × 0.28 × 0.25 mm |
Agilent SuperNova CCD diffractometer | 3010 independent reflections |
Radiation source: SuperNova (Mo) X-ray Source | 2398 reflections with I > 2σ(I) |
Mirror monochromator | Rint = 0.026 |
Detector resolution: 16.0733 pixels mm-1 | θmax = 26.4°, θmin = 3.1° |
ω scans | h = −19→20 |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2012) | k = −10→8 |
Tmin = 0.982, Tmax = 1.000 | l = −26→12 |
6104 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)] = 0.047 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.119 | H-atom parameters constrained |
S = 1.06 | w = 1/[σ2(Fo2) + (0.0458P)2 + 1.9069P] where P = (Fo2 + 2Fc2)/3 |
3010 reflections | (Δ/σ)max < 0.001 |
209 parameters | Δρmax = 0.14 e Å−3 |
0 restraints | Δρmin = −0.19 e Å−3 |
C19H15N3O | V = 2938.0 (2) Å3 |
Mr = 301.34 | Z = 8 |
Monoclinic, C2/c | Mo Kα radiation |
a = 16.1886 (7) Å | µ = 0.09 mm−1 |
b = 8.4863 (4) Å | T = 291 K |
c = 21.4316 (10) Å | 0.36 × 0.28 × 0.25 mm |
β = 93.756 (4)° |
Agilent SuperNova CCD diffractometer | 3010 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2012) | 2398 reflections with I > 2σ(I) |
Tmin = 0.982, Tmax = 1.000 | Rint = 0.026 |
6104 measured reflections |
R[F2 > 2σ(F2)] = 0.047 | 0 restraints |
wR(F2) = 0.119 | H-atom parameters constrained |
S = 1.06 | Δρmax = 0.14 e Å−3 |
3010 reflections | Δρmin = −0.19 e Å−3 |
209 parameters |
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 | 0.14368 (7) | 0.81061 (16) | 0.41079 (6) | 0.0423 (3) | |
H1 | 0.0999 | 0.8588 | 0.4055 | 0.063* | |
N1 | 0.38187 (8) | 0.62034 (16) | 0.40429 (6) | 0.0283 (3) | |
N2 | 0.49801 (8) | 0.48060 (17) | 0.39527 (7) | 0.0336 (4) | |
N3 | 0.32187 (10) | 0.05156 (18) | 0.48316 (8) | 0.0428 (4) | |
C1 | 0.43786 (10) | 0.7203 (2) | 0.37809 (8) | 0.0295 (4) | |
C2 | 0.43205 (11) | 0.8769 (2) | 0.35956 (9) | 0.0389 (4) | |
H2 | 0.3843 | 0.9358 | 0.3640 | 0.047* | |
C3 | 0.50055 (12) | 0.9406 (3) | 0.33434 (10) | 0.0478 (5) | |
H3 | 0.4992 | 1.0456 | 0.3219 | 0.057* | |
C4 | 0.57225 (12) | 0.8523 (3) | 0.32683 (10) | 0.0475 (5) | |
H4 | 0.6170 | 0.8993 | 0.3091 | 0.057* | |
C5 | 0.57749 (11) | 0.6972 (2) | 0.34522 (9) | 0.0417 (5) | |
H5 | 0.6248 | 0.6381 | 0.3398 | 0.050* | |
C6 | 0.50936 (10) | 0.6314 (2) | 0.37236 (8) | 0.0318 (4) | |
C7 | 0.42090 (9) | 0.47799 (19) | 0.41279 (8) | 0.0281 (4) | |
C8 | 0.38405 (10) | 0.33423 (19) | 0.43756 (7) | 0.0283 (4) | |
C9 | 0.30488 (10) | 0.2814 (2) | 0.41897 (8) | 0.0325 (4) | |
H9 | 0.2709 | 0.3400 | 0.3910 | 0.039* | |
C10 | 0.27757 (12) | 0.1415 (2) | 0.44250 (9) | 0.0381 (4) | |
H10 | 0.2247 | 0.1075 | 0.4292 | 0.046* | |
C11 | 0.39780 (12) | 0.1031 (2) | 0.50078 (9) | 0.0433 (5) | |
H11 | 0.4299 | 0.0425 | 0.5293 | 0.052* | |
C12 | 0.43145 (11) | 0.2401 (2) | 0.47940 (8) | 0.0378 (4) | |
H12 | 0.4851 | 0.2695 | 0.4927 | 0.045* | |
C13 | 0.29647 (9) | 0.6653 (2) | 0.41536 (8) | 0.0289 (4) | |
H13A | 0.2968 | 0.7650 | 0.4375 | 0.035* | |
H13B | 0.2725 | 0.5864 | 0.4415 | 0.035* | |
C14 | 0.24385 (10) | 0.68048 (19) | 0.35455 (8) | 0.0274 (4) | |
C15 | 0.16757 (10) | 0.75871 (19) | 0.35461 (8) | 0.0296 (4) | |
C16 | 0.12004 (11) | 0.7808 (2) | 0.29896 (9) | 0.0365 (4) | |
H16 | 0.0702 | 0.8353 | 0.2991 | 0.044* | |
C17 | 0.14634 (11) | 0.7224 (2) | 0.24338 (9) | 0.0413 (5) | |
H17 | 0.1144 | 0.7380 | 0.2062 | 0.050* | |
C18 | 0.21993 (12) | 0.6410 (3) | 0.24306 (9) | 0.0437 (5) | |
H18 | 0.2370 | 0.5990 | 0.2060 | 0.052* | |
C19 | 0.26815 (10) | 0.6220 (2) | 0.29809 (8) | 0.0355 (4) | |
H19 | 0.3183 | 0.5687 | 0.2973 | 0.043* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0284 (7) | 0.0537 (9) | 0.0450 (7) | 0.0191 (6) | 0.0052 (5) | −0.0023 (6) |
N1 | 0.0204 (6) | 0.0291 (8) | 0.0358 (8) | 0.0049 (5) | 0.0060 (6) | 0.0042 (6) |
N2 | 0.0233 (7) | 0.0334 (8) | 0.0449 (9) | 0.0074 (6) | 0.0073 (6) | 0.0041 (7) |
N3 | 0.0508 (10) | 0.0338 (9) | 0.0452 (9) | 0.0011 (8) | 0.0126 (8) | 0.0048 (7) |
C1 | 0.0226 (8) | 0.0337 (9) | 0.0324 (8) | 0.0011 (7) | 0.0037 (7) | 0.0031 (7) |
C2 | 0.0303 (9) | 0.0353 (10) | 0.0516 (11) | 0.0054 (8) | 0.0064 (8) | 0.0087 (9) |
C3 | 0.0403 (11) | 0.0404 (11) | 0.0630 (13) | −0.0016 (9) | 0.0064 (10) | 0.0189 (10) |
C4 | 0.0314 (10) | 0.0546 (13) | 0.0571 (12) | −0.0072 (9) | 0.0088 (9) | 0.0173 (10) |
C5 | 0.0225 (8) | 0.0515 (12) | 0.0519 (11) | 0.0033 (8) | 0.0086 (8) | 0.0079 (10) |
C6 | 0.0231 (8) | 0.0346 (10) | 0.0378 (9) | 0.0022 (7) | 0.0026 (7) | 0.0050 (8) |
C7 | 0.0222 (8) | 0.0306 (9) | 0.0313 (8) | 0.0056 (7) | 0.0017 (6) | 0.0004 (7) |
C8 | 0.0297 (8) | 0.0273 (9) | 0.0286 (8) | 0.0056 (7) | 0.0078 (7) | −0.0009 (7) |
C9 | 0.0300 (9) | 0.0347 (10) | 0.0330 (9) | 0.0033 (7) | 0.0026 (7) | 0.0020 (7) |
C10 | 0.0384 (10) | 0.0356 (10) | 0.0411 (10) | −0.0040 (8) | 0.0078 (8) | −0.0014 (8) |
C11 | 0.0453 (11) | 0.0409 (11) | 0.0438 (11) | 0.0093 (9) | 0.0028 (9) | 0.0131 (9) |
C12 | 0.0332 (9) | 0.0403 (11) | 0.0394 (10) | 0.0055 (8) | −0.0010 (8) | 0.0048 (8) |
C13 | 0.0217 (8) | 0.0292 (9) | 0.0366 (9) | 0.0064 (7) | 0.0082 (7) | 0.0014 (7) |
C14 | 0.0220 (7) | 0.0244 (8) | 0.0363 (9) | 0.0016 (6) | 0.0061 (7) | 0.0025 (7) |
C15 | 0.0226 (8) | 0.0261 (9) | 0.0405 (9) | 0.0022 (7) | 0.0052 (7) | 0.0027 (7) |
C16 | 0.0240 (8) | 0.0363 (10) | 0.0489 (11) | 0.0016 (7) | 0.0001 (8) | 0.0074 (8) |
C17 | 0.0342 (10) | 0.0499 (12) | 0.0391 (10) | −0.0072 (8) | −0.0037 (8) | 0.0058 (9) |
C18 | 0.0381 (10) | 0.0574 (13) | 0.0363 (10) | −0.0058 (9) | 0.0077 (8) | −0.0041 (9) |
C19 | 0.0257 (8) | 0.0407 (11) | 0.0410 (10) | 0.0024 (8) | 0.0079 (7) | −0.0019 (8) |
O1—H1 | 0.8200 | C8—C12 | 1.393 (2) |
O1—C15 | 1.362 (2) | C9—H9 | 0.9300 |
N1—C1 | 1.387 (2) | C9—C10 | 1.374 (2) |
N1—C7 | 1.370 (2) | C10—H10 | 0.9300 |
N1—C13 | 1.4684 (19) | C11—H11 | 0.9300 |
N2—C6 | 1.387 (2) | C11—C12 | 1.376 (3) |
N2—C7 | 1.327 (2) | C12—H12 | 0.9300 |
N3—C10 | 1.332 (2) | C13—H13A | 0.9700 |
N3—C11 | 1.336 (3) | C13—H13B | 0.9700 |
C1—C2 | 1.389 (2) | C13—C14 | 1.515 (2) |
C1—C6 | 1.394 (2) | C14—C15 | 1.402 (2) |
C2—H2 | 0.9300 | C14—C19 | 1.388 (2) |
C2—C3 | 1.376 (3) | C15—C16 | 1.389 (2) |
C3—H3 | 0.9300 | C16—H16 | 0.9300 |
C3—C4 | 1.399 (3) | C16—C17 | 1.383 (3) |
C4—H4 | 0.9300 | C17—H17 | 0.9300 |
C4—C5 | 1.375 (3) | C17—C18 | 1.378 (3) |
C5—H5 | 0.9300 | C18—H18 | 0.9300 |
C5—C6 | 1.397 (2) | C18—C19 | 1.380 (3) |
C7—C8 | 1.472 (2) | C19—H19 | 0.9300 |
C8—C9 | 1.391 (2) | ||
C15—O1—H1 | 109.5 | N3—C10—C9 | 124.25 (18) |
C1—N1—C13 | 123.64 (13) | N3—C10—H10 | 117.9 |
C7—N1—C1 | 106.57 (13) | C9—C10—H10 | 117.9 |
C7—N1—C13 | 129.68 (14) | N3—C11—H11 | 118.0 |
C7—N2—C6 | 105.34 (14) | N3—C11—C12 | 124.03 (17) |
C10—N3—C11 | 116.32 (16) | C12—C11—H11 | 118.0 |
N1—C1—C2 | 131.86 (15) | C8—C12—H12 | 120.5 |
N1—C1—C6 | 105.87 (14) | C11—C12—C8 | 119.07 (17) |
C2—C1—C6 | 122.27 (15) | C11—C12—H12 | 120.5 |
C1—C2—H2 | 121.7 | N1—C13—H13A | 109.3 |
C3—C2—C1 | 116.55 (17) | N1—C13—H13B | 109.3 |
C3—C2—H2 | 121.7 | N1—C13—C14 | 111.43 (13) |
C2—C3—H3 | 119.0 | H13A—C13—H13B | 108.0 |
C2—C3—C4 | 122.08 (18) | C14—C13—H13A | 109.3 |
C4—C3—H3 | 119.0 | C14—C13—H13B | 109.3 |
C3—C4—H4 | 119.5 | C15—C14—C13 | 119.01 (14) |
C5—C4—C3 | 121.03 (17) | C19—C14—C13 | 122.95 (14) |
C5—C4—H4 | 119.5 | C19—C14—C15 | 118.03 (16) |
C4—C5—H5 | 121.1 | O1—C15—C14 | 117.08 (15) |
C4—C5—C6 | 117.82 (17) | O1—C15—C16 | 122.82 (15) |
C6—C5—H5 | 121.1 | C16—C15—C14 | 120.10 (16) |
N2—C6—C1 | 109.76 (14) | C15—C16—H16 | 119.8 |
N2—C6—C5 | 130.01 (16) | C17—C16—C15 | 120.43 (16) |
C1—C6—C5 | 120.21 (16) | C17—C16—H16 | 119.8 |
N1—C7—C8 | 125.77 (14) | C16—C17—H17 | 120.0 |
N2—C7—N1 | 112.44 (15) | C18—C17—C16 | 119.96 (17) |
N2—C7—C8 | 121.79 (14) | C18—C17—H17 | 120.0 |
C9—C8—C7 | 123.44 (15) | C17—C18—H18 | 120.2 |
C9—C8—C12 | 117.26 (16) | C17—C18—C19 | 119.66 (18) |
C12—C8—C7 | 119.21 (15) | C19—C18—H18 | 120.2 |
C8—C9—H9 | 120.5 | C14—C19—H19 | 119.1 |
C10—C9—C8 | 119.06 (16) | C18—C19—C14 | 121.77 (17) |
C10—C9—H9 | 120.5 | C18—C19—H19 | 119.1 |
O1—C15—C16—C17 | −178.45 (17) | C7—N1—C1—C6 | −0.32 (18) |
N1—C1—C2—C3 | −179.45 (18) | C7—N1—C13—C14 | −104.93 (19) |
N1—C1—C6—N2 | −0.75 (19) | C7—N2—C6—C1 | 1.54 (19) |
N1—C1—C6—C5 | 177.82 (16) | C7—N2—C6—C5 | −176.85 (19) |
N1—C7—C8—C9 | 44.3 (2) | C7—C8—C9—C10 | 176.76 (15) |
N1—C7—C8—C12 | −139.15 (18) | C7—C8—C12—C11 | −177.78 (16) |
N1—C13—C14—C15 | −164.53 (14) | C8—C9—C10—N3 | 0.7 (3) |
N1—C13—C14—C19 | 14.6 (2) | C9—C8—C12—C11 | −1.0 (3) |
N2—C7—C8—C9 | −134.83 (18) | C10—N3—C11—C12 | −0.2 (3) |
N2—C7—C8—C12 | 41.7 (2) | C11—N3—C10—C9 | −0.7 (3) |
N3—C11—C12—C8 | 1.1 (3) | C12—C8—C9—C10 | 0.2 (2) |
C1—N1—C7—N2 | 1.36 (19) | C13—N1—C1—C2 | 3.4 (3) |
C1—N1—C7—C8 | −177.87 (15) | C13—N1—C1—C6 | −176.74 (14) |
C1—N1—C13—C14 | 70.6 (2) | C13—N1—C7—N2 | 177.48 (15) |
C1—C2—C3—C4 | 0.8 (3) | C13—N1—C7—C8 | −1.7 (3) |
C2—C1—C6—N2 | 179.12 (17) | C13—C14—C15—O1 | −2.9 (2) |
C2—C1—C6—C5 | −2.3 (3) | C13—C14—C15—C16 | 176.89 (15) |
C2—C3—C4—C5 | −0.8 (3) | C13—C14—C19—C18 | −178.34 (16) |
C3—C4—C5—C6 | −0.8 (3) | C14—C15—C16—C17 | 1.8 (3) |
C4—C5—C6—N2 | −179.47 (19) | C15—C14—C19—C18 | 0.8 (3) |
C4—C5—C6—C1 | 2.3 (3) | C15—C16—C17—C18 | 0.3 (3) |
C6—N2—C7—N1 | −1.79 (19) | C16—C17—C18—C19 | −1.8 (3) |
C6—N2—C7—C8 | 177.48 (15) | C17—C18—C19—C14 | 1.2 (3) |
C6—C1—C2—C3 | 0.7 (3) | C19—C14—C15—O1 | 177.92 (16) |
C7—N1—C1—C2 | 179.83 (19) | C19—C14—C15—C16 | −2.3 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N2i | 0.82 | 1.95 | 2.7659 (18) | 177 |
Symmetry code: (i) x−1/2, y+1/2, z. |
Experimental details
Crystal data | |
Chemical formula | C19H15N3O |
Mr | 301.34 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 291 |
a, b, c (Å) | 16.1886 (7), 8.4863 (4), 21.4316 (10) |
β (°) | 93.756 (4) |
V (Å3) | 2938.0 (2) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.36 × 0.28 × 0.25 |
Data collection | |
Diffractometer | Agilent SuperNova CCD |
Absorption correction | Multi-scan (CrysAlis PRO; Agilent, 2012) |
Tmin, Tmax | 0.982, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 6104, 3010, 2398 |
Rint | 0.026 |
(sin θ/λ)max (Å−1) | 0.625 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.047, 0.119, 1.06 |
No. of reflections | 3010 |
No. of parameters | 209 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.14, −0.19 |
Computer programs: CrysAlis PRO (Agilent, 2012), SUPERFLIP (Palatinus & Chapuis, 2007), SHELXL97 (Sheldrick, 2008), OLEX2 (Dolomanov et al., 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N2i | 0.82 | 1.95 | 2.7659 (18) | 177 |
Symmetry code: (i) x−1/2, y+1/2, z. |
Acknowledgements
This work was supported by the Natural Science Foundation of Gansu (grant No. 0710RJ ZA113).
References
Agilent (2012). CrysAlis PRO. Agilent Technologies, Yarnton, England. Google Scholar
Carcanague, D., Shue, Y.-K., Wuonola, M. A., Uria-Nickelsen, M., Joubran, C., Abedi, J. K., Jones, J. & Kühler, T. C. (2002). J. Med. Chem. 45, 4300–4309. Web of Science CrossRef PubMed CAS Google Scholar
Dolomanov, O. V., Bourhis, L. J., Gildea, R. J., Howard, J. A. K. & Puschmann, H. (2009). J. Appl. Cryst. 42, 339–341. Web of Science CrossRef CAS IUCr Journals Google Scholar
Fellah, F. Z. C., Costes, J.-P., Duhayon, C., Daran, J.-C. & Tuchagues, J.-P. (2010). Polyhedron, 29, 2111–2119. Google Scholar
Janiak, C. (2000). Dalton Trans. 21, 3885–3896. CrossRef Google Scholar
Kitazume, T. & Ishikawa, N. (1974). Bull. Chem. Soc. Jpn, 47, 785–786. CrossRef CAS Web of Science Google Scholar
Kühler, T. C., Swanson, M., Christenson, B., Klintenberg, A.-C., Lamm, B., Fägherhag, J., Gatti, R., Ölwegård-Halvarsson, M., Shcherbuchin, V., Elebring, T. & Sjöström, J.-E. (2002). J. Med. Chem. 45, 4282–4299. Web of Science PubMed Google Scholar
Li, X.-P., Pan, M., Zheng, S.-R., Liu, Y.-R., He, Q.-T., Kang, B.-S. & Su, C.-Y. (2007). Cryst. Growth Des. 7, 1569–1574. CAS Google Scholar
Palatinus, L. & Chapuis, G. (2007). J. Appl. Cryst. 40, 786–790. Web of Science CrossRef CAS IUCr Journals Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Yang, X.-P., Jones, R. A., Lai, R. J., Waheed, A., Oye, M. M. & Holmes, A. L. (2006). Polyhedron, 25, 881–887. Web of Science CSD CrossRef CAS Google Scholar
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.
Supramolecular chemistry based on coordination compounds is a vast area of current research. Benzimidazole derivatives have attracted the attention of many synthetic chemists, due not only to their useful biological activities but also to their strong coordinating abilities as multidentate ligands (Kühler et al., 2002; Carcanague et al., 2002; Yang et al., 2006; Li et al., 2007). In our studies, we synthesized the substituted benzimidazole ligand 2-[2-(pyridin-4-yl)-1H-benzimidazol-1-ylmethyl]phenol, C19H15N3O, derived from the transformation of an unsymmetrical Schiff base and the structure is reported herein.
Within the ligand, the pyridine group is rigidly linked to the central C atom of the benzimidazole group, and the phenol ring is attached via a methylene group to an N-atom (Kitazume & Ishikawa, 1974). The dihedral angles between the pyridine and phenyl rings and the benzimidazole ring are 44.36 (7) and 75.67 (7)°, respectively. These deviations from planarity, in part, may be influenced by intermolecular phenolic O—H···N hydrogen bonds to benzimidazole N-atom acceptors (Table 1), giving one-dimensional chains extending along [110] (Fig. 2). In addition, the crystal structure is stabilized by weak face-to-face π–π stacking interactions involving the pyridine rings, with the shortest centroid to centroid distance between these planes of 3.9624 (10)Å]. This value is within the upper limit of the common range for π–π interactions (Janiak, 2000).