organic compounds
(E)-4-Chloro-2-{[4-(3,5-dichloropyridin-2-yloxy)phenylimino]methyl}phenol
aDepartment of Chemistry, Zhejiang University, Hangzhou 310027, People's Republic of China, and bSchool of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310012, People's Republic of China
*Correspondence e-mail: wujunwu@zju.edu.cn
In the title molecule, C18H11Cl3N2O2, the central benzene ring is oriented at 8.44 (12) and 70.57 (11)° with respect to the terminal chlorophenol and dichloropyridine rings, respectively. The molecular structure is stabilized by an intramolecular O—H⋯N hydrogen bond, which generates an S(6) ring motif. In the crystal, π–π stacking between parallel pyridine rings is observed [centroid–centroid distance = 3.6561 (14) Å].
Related literature
For general background to the pharmacological activity of Schiff base compounds, see: Shapiro (1998); Venugopal & Jayashree (2008); Pandey et al. (2003); Bhat et al. (2005); Wadher et al. (2009). For a related structure, see: Fun et al. (2011).
Experimental
Crystal data
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Refinement
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Data collection: CrysAlis PRO (Oxford Diffraction, 2010); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); 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
10.1107/S1600536811041584/xu5335sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811041584/xu5335Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536811041584/xu5335Isup3.cml
The title compound was prepared by the condensation reaction of 5-chloro-2-hydroxybenzaldehyde (5 mmol, 0.78 g) and 4-(3,5-dichloropyridin-2-yloxy)benzenamine (5 mmol, 1.27 g) in anhydrous methanol (30 ml) at ambient temperature. The solution was magnetically stirred at ambient temperature for 10 min until it turned to yellow. Yellow single crystals suitable for X-ray structural determination were obtained by slow evaporation of the solution for 7 d.
H atoms were placed in idealized positions (C—H = 0.93 Å, O—H= 0.82 Å), and refined as riding, with Uiso(H) = 1.2Ueq(C) and 1.5Ueq(O).
Data collection: CrysAlis PRO (Oxford Diffraction, 2010); cell
CrysAlis PRO (Oxford Diffraction, 2010); data reduction: CrysAlis PRO (Oxford Diffraction, 2010); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); 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).Fig. 1. The molecular structure of title compound, with atom labels and 50% probability displacement ellipsoids for non-H atoms. |
C18H11Cl3N2O2 | F(000) = 800 |
Mr = 393.64 | Dx = 1.537 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 1892 reflections |
a = 13.8981 (7) Å | θ = 2.9–29.5° |
b = 11.7006 (8) Å | µ = 0.55 mm−1 |
c = 10.5034 (5) Å | T = 293 K |
β = 95.318 (5)° | Block, yellow |
V = 1700.67 (16) Å3 | 0.38 × 0.36 × 0.29 mm |
Z = 4 |
Oxford Diffraction Xcalibur Atlas Gemini ultra diffractometer | 3107 independent reflections |
Radiation source: fine-focus sealed tube | 2186 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.025 |
Detector resolution: 10.3592 pixels mm-1 | θmax = 25.4°, θmin = 2.9° |
ω scans | h = −16→16 |
Absorption correction: multi-scan (CrysAlis PRO; Oxford Diffraction, 2010) | k = −14→8 |
Tmin = 0.817, Tmax = 0.856 | l = −12→12 |
7882 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)] = 0.040 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.100 | H-atom parameters constrained |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0376P)2 + 0.5849P] where P = (Fo2 + 2Fc2)/3 |
3107 reflections | (Δ/σ)max < 0.001 |
227 parameters | Δρmax = 0.27 e Å−3 |
0 restraints | Δρmin = −0.26 e Å−3 |
C18H11Cl3N2O2 | V = 1700.67 (16) Å3 |
Mr = 393.64 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 13.8981 (7) Å | µ = 0.55 mm−1 |
b = 11.7006 (8) Å | T = 293 K |
c = 10.5034 (5) Å | 0.38 × 0.36 × 0.29 mm |
β = 95.318 (5)° |
Oxford Diffraction Xcalibur Atlas Gemini ultra diffractometer | 3107 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Oxford Diffraction, 2010) | 2186 reflections with I > 2σ(I) |
Tmin = 0.817, Tmax = 0.856 | Rint = 0.025 |
7882 measured reflections |
R[F2 > 2σ(F2)] = 0.040 | 0 restraints |
wR(F2) = 0.100 | H-atom parameters constrained |
S = 1.03 | Δρmax = 0.27 e Å−3 |
3107 reflections | Δρmin = −0.26 e Å−3 |
227 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 | ||
Cl1 | −0.24721 (6) | 0.26343 (9) | 1.31374 (10) | 0.1009 (3) | |
Cl2 | 0.53771 (6) | 0.21299 (7) | 0.55024 (6) | 0.0716 (2) | |
Cl3 | 0.41754 (6) | 0.53738 (7) | 0.20843 (6) | 0.0723 (2) | |
O1 | 0.08837 (14) | 0.54210 (18) | 1.22171 (19) | 0.0727 (6) | |
H1 | 0.1140 | 0.5196 | 1.1591 | 0.109* | |
O2 | 0.37377 (13) | 0.29274 (16) | 0.67705 (16) | 0.0629 (5) | |
N1 | 0.11798 (14) | 0.40766 (18) | 1.03385 (17) | 0.0464 (5) | |
N2 | 0.32327 (15) | 0.4354 (2) | 0.53329 (19) | 0.0570 (6) | |
C1 | 0.01103 (17) | 0.4760 (2) | 1.2388 (2) | 0.0503 (6) | |
C2 | −0.0441 (2) | 0.5020 (3) | 1.3378 (2) | 0.0618 (7) | |
H2 | −0.0275 | 0.5646 | 1.3899 | 0.074* | |
C3 | −0.1226 (2) | 0.4374 (3) | 1.3606 (3) | 0.0635 (8) | |
H3 | −0.1592 | 0.4560 | 1.4274 | 0.076* | |
C4 | −0.14696 (18) | 0.3448 (3) | 1.2841 (3) | 0.0605 (7) | |
C5 | −0.09479 (18) | 0.3184 (2) | 1.1840 (2) | 0.0556 (6) | |
H5 | −0.1130 | 0.2563 | 1.1320 | 0.067* | |
C6 | −0.01468 (16) | 0.3832 (2) | 1.1588 (2) | 0.0452 (6) | |
C7 | 0.04132 (17) | 0.3533 (2) | 1.0541 (2) | 0.0479 (6) | |
H7 | 0.0209 | 0.2932 | 1.0004 | 0.057* | |
C8 | 0.17777 (16) | 0.3761 (2) | 0.9376 (2) | 0.0439 (6) | |
C9 | 0.16860 (18) | 0.2763 (2) | 0.8667 (2) | 0.0587 (7) | |
H9 | 0.1192 | 0.2251 | 0.8796 | 0.070* | |
C10 | 0.23239 (19) | 0.2524 (3) | 0.7770 (2) | 0.0580 (7) | |
H10 | 0.2258 | 0.1856 | 0.7290 | 0.070* | |
C11 | 0.30536 (18) | 0.3275 (2) | 0.7592 (2) | 0.0506 (6) | |
C12 | 0.31653 (19) | 0.4262 (2) | 0.8286 (3) | 0.0605 (7) | |
H12 | 0.3665 | 0.4766 | 0.8159 | 0.073* | |
C13 | 0.25235 (18) | 0.4498 (2) | 0.9179 (2) | 0.0545 (6) | |
H13 | 0.2596 | 0.5167 | 0.9657 | 0.065* | |
C14 | 0.38386 (18) | 0.3526 (2) | 0.5682 (2) | 0.0483 (6) | |
C15 | 0.45916 (17) | 0.3205 (2) | 0.4973 (2) | 0.0463 (6) | |
C16 | 0.47057 (17) | 0.3767 (2) | 0.3851 (2) | 0.0475 (6) | |
H16 | 0.5199 | 0.3571 | 0.3351 | 0.057* | |
C17 | 0.40660 (18) | 0.4631 (2) | 0.3490 (2) | 0.0495 (6) | |
C18 | 0.33466 (19) | 0.4902 (2) | 0.4238 (2) | 0.0580 (7) | |
H18 | 0.2921 | 0.5488 | 0.3978 | 0.070* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1 | 0.0704 (5) | 0.0995 (7) | 0.1413 (8) | −0.0127 (5) | 0.0547 (5) | 0.0032 (6) |
Cl2 | 0.0835 (5) | 0.0768 (5) | 0.0579 (4) | 0.0333 (4) | 0.0250 (3) | 0.0073 (4) |
Cl3 | 0.0867 (5) | 0.0815 (6) | 0.0517 (4) | 0.0132 (4) | 0.0228 (3) | 0.0158 (3) |
O1 | 0.0733 (13) | 0.0749 (15) | 0.0738 (13) | −0.0208 (11) | 0.0273 (10) | −0.0201 (11) |
O2 | 0.0720 (12) | 0.0679 (13) | 0.0535 (10) | 0.0212 (10) | 0.0307 (9) | 0.0124 (9) |
N1 | 0.0459 (11) | 0.0541 (13) | 0.0406 (10) | 0.0016 (10) | 0.0124 (9) | 0.0025 (9) |
N2 | 0.0572 (13) | 0.0677 (15) | 0.0487 (12) | 0.0133 (11) | 0.0180 (10) | 0.0065 (11) |
C1 | 0.0479 (14) | 0.0581 (17) | 0.0461 (13) | −0.0003 (12) | 0.0102 (11) | 0.0045 (12) |
C2 | 0.0675 (18) | 0.0693 (19) | 0.0505 (15) | 0.0029 (15) | 0.0158 (13) | −0.0090 (14) |
C3 | 0.0595 (17) | 0.080 (2) | 0.0543 (15) | 0.0136 (15) | 0.0251 (13) | 0.0055 (15) |
C4 | 0.0474 (14) | 0.0638 (19) | 0.0734 (18) | 0.0041 (13) | 0.0226 (13) | 0.0107 (15) |
C5 | 0.0516 (14) | 0.0543 (16) | 0.0623 (16) | 0.0013 (13) | 0.0120 (13) | −0.0016 (13) |
C6 | 0.0448 (13) | 0.0490 (15) | 0.0426 (12) | 0.0053 (11) | 0.0082 (10) | 0.0051 (11) |
C7 | 0.0503 (14) | 0.0495 (15) | 0.0445 (13) | 0.0045 (12) | 0.0079 (11) | −0.0029 (11) |
C8 | 0.0442 (13) | 0.0513 (15) | 0.0372 (12) | 0.0039 (11) | 0.0083 (10) | 0.0028 (11) |
C9 | 0.0523 (15) | 0.0645 (19) | 0.0617 (16) | −0.0102 (13) | 0.0188 (13) | −0.0100 (14) |
C10 | 0.0607 (16) | 0.0637 (18) | 0.0505 (15) | 0.0014 (14) | 0.0097 (12) | −0.0125 (13) |
C11 | 0.0549 (15) | 0.0577 (17) | 0.0415 (13) | 0.0128 (13) | 0.0164 (11) | 0.0074 (12) |
C12 | 0.0572 (15) | 0.0607 (19) | 0.0674 (17) | −0.0055 (13) | 0.0259 (13) | −0.0009 (14) |
C13 | 0.0580 (15) | 0.0552 (17) | 0.0523 (14) | −0.0028 (13) | 0.0157 (12) | −0.0065 (12) |
C14 | 0.0541 (14) | 0.0533 (16) | 0.0393 (13) | 0.0034 (12) | 0.0139 (11) | −0.0016 (11) |
C15 | 0.0499 (13) | 0.0476 (15) | 0.0426 (12) | 0.0033 (11) | 0.0104 (11) | −0.0053 (11) |
C16 | 0.0478 (13) | 0.0570 (16) | 0.0398 (12) | −0.0020 (12) | 0.0149 (11) | −0.0093 (11) |
C17 | 0.0555 (15) | 0.0561 (16) | 0.0377 (12) | −0.0022 (12) | 0.0080 (11) | −0.0001 (11) |
C18 | 0.0603 (16) | 0.0653 (18) | 0.0499 (15) | 0.0129 (14) | 0.0129 (13) | 0.0074 (13) |
Cl1—C4 | 1.739 (3) | C5—H5 | 0.9300 |
Cl2—C15 | 1.724 (2) | C6—C7 | 1.448 (3) |
Cl3—C17 | 1.732 (2) | C7—H7 | 0.9300 |
O1—C1 | 1.349 (3) | C8—C13 | 1.379 (3) |
O1—H1 | 0.8200 | C8—C9 | 1.384 (3) |
O2—C14 | 1.359 (3) | C9—C10 | 1.381 (3) |
O2—C11 | 1.402 (3) | C9—H9 | 0.9300 |
N1—C7 | 1.275 (3) | C10—C11 | 1.368 (4) |
N1—C8 | 1.416 (3) | C10—H10 | 0.9300 |
N2—C14 | 1.314 (3) | C11—C12 | 1.367 (4) |
N2—C18 | 1.339 (3) | C12—C13 | 1.381 (3) |
C1—C2 | 1.381 (3) | C12—H12 | 0.9300 |
C1—C6 | 1.400 (3) | C13—H13 | 0.9300 |
C2—C3 | 1.366 (4) | C14—C15 | 1.391 (3) |
C2—H2 | 0.9300 | C15—C16 | 1.371 (3) |
C3—C4 | 1.372 (4) | C16—C17 | 1.376 (3) |
C3—H3 | 0.9300 | C16—H16 | 0.9300 |
C4—C5 | 1.366 (3) | C17—C18 | 1.365 (3) |
C5—C6 | 1.393 (3) | C18—H18 | 0.9300 |
C1—O1—H1 | 109.5 | C10—C9—H9 | 119.8 |
C14—O2—C11 | 119.80 (19) | C8—C9—H9 | 119.8 |
C7—N1—C8 | 122.9 (2) | C11—C10—C9 | 119.6 (3) |
C14—N2—C18 | 118.0 (2) | C11—C10—H10 | 120.2 |
O1—C1—C2 | 118.6 (2) | C9—C10—H10 | 120.2 |
O1—C1—C6 | 121.8 (2) | C12—C11—C10 | 121.2 (2) |
C2—C1—C6 | 119.6 (2) | C12—C11—O2 | 121.6 (2) |
C3—C2—C1 | 121.1 (3) | C10—C11—O2 | 116.9 (2) |
C3—C2—H2 | 119.4 | C11—C12—C13 | 118.9 (2) |
C1—C2—H2 | 119.4 | C11—C12—H12 | 120.6 |
C2—C3—C4 | 119.5 (3) | C13—C12—H12 | 120.6 |
C2—C3—H3 | 120.3 | C8—C13—C12 | 121.2 (2) |
C4—C3—H3 | 120.3 | C8—C13—H13 | 119.4 |
C5—C4—C3 | 120.6 (3) | C12—C13—H13 | 119.4 |
C5—C4—Cl1 | 120.3 (2) | N2—C14—O2 | 120.1 (2) |
C3—C4—Cl1 | 119.0 (2) | N2—C14—C15 | 123.0 (2) |
C4—C5—C6 | 120.9 (3) | O2—C14—C15 | 116.9 (2) |
C4—C5—H5 | 119.5 | C16—C15—C14 | 118.9 (2) |
C6—C5—H5 | 119.5 | C16—C15—Cl2 | 120.45 (18) |
C5—C6—C1 | 118.2 (2) | C14—C15—Cl2 | 120.63 (18) |
C5—C6—C7 | 120.6 (2) | C15—C16—C17 | 117.8 (2) |
C1—C6—C7 | 121.2 (2) | C15—C16—H16 | 121.1 |
N1—C7—C6 | 121.5 (2) | C17—C16—H16 | 121.1 |
N1—C7—H7 | 119.2 | C18—C17—C16 | 120.0 (2) |
C6—C7—H7 | 119.2 | C18—C17—Cl3 | 120.1 (2) |
C13—C8—C9 | 118.7 (2) | C16—C17—Cl3 | 119.89 (19) |
C13—C8—N1 | 116.3 (2) | N2—C18—C17 | 122.3 (2) |
C9—C8—N1 | 125.0 (2) | N2—C18—H18 | 118.8 |
C10—C9—C8 | 120.3 (2) | C17—C18—H18 | 118.8 |
Experimental details
Crystal data | |
Chemical formula | C18H11Cl3N2O2 |
Mr | 393.64 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 293 |
a, b, c (Å) | 13.8981 (7), 11.7006 (8), 10.5034 (5) |
β (°) | 95.318 (5) |
V (Å3) | 1700.67 (16) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.55 |
Crystal size (mm) | 0.38 × 0.36 × 0.29 |
Data collection | |
Diffractometer | Oxford Diffraction Xcalibur Atlas Gemini ultra diffractometer |
Absorption correction | Multi-scan (CrysAlis PRO; Oxford Diffraction, 2010) |
Tmin, Tmax | 0.817, 0.856 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7882, 3107, 2186 |
Rint | 0.025 |
(sin θ/λ)max (Å−1) | 0.602 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.040, 0.100, 1.03 |
No. of reflections | 3107 |
No. of parameters | 227 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.27, −0.26 |
Computer programs: CrysAlis PRO (Oxford Diffraction, 2010), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), OLEX2 (Dolomanov et al., 2009).
Acknowledgements
The project was supported by the National Natural Science Foundation of China (grant No. 31071720) and the Natural Science Foundation of Zhejiang Province, China (grant No. D3080282).
References
Bhat, M. A., Imran, M., Khan, S. A. & Siddiqui, N. (2005). J. Pharm. Sci. 67, 151–159. 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
Fun, H.-K., Quah, C. K., Viveka, S., Madhukumar, D. J. & Nagaraja, G. K. (2011). Acta Cryst. E67, o1933. Web of Science CSD CrossRef IUCr Journals Google Scholar
Oxford Diffraction (2010). CrysAlis PRO. Oxford Diffraction Ltd, Yarnton, England. Google Scholar
Pandey, S. N., Lakshmi, V. S. & Pandey, A. (2003). Indian J. Pharm. Sci. 65, 213–222. Google Scholar
Shapiro, H. K. (1998). Am. J. Ther. 5, 323–353. CrossRef PubMed CAS Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Venugopal, K. N. & Jayashree, B. S. (2008). Indian J. Pharm. Sci. 70, 88–91. Web of Science PubMed Google Scholar
Wadher, S. J., Puranik, M. P., Karande, N. A. & Yeole, P. G. (2009). Int. J. Pharm. Tech. Res. 1, 22–33. 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.
In 2011, much attention has been focused on the biological properties of Schiff bases compounds, Schiff base ligands may contain a variety of substituents with different electron-donating or electron-withdrawing groups and therefore may have interesting chemical properties. They have attracted particular interest due to their biological activities (Shapiro, 1998). They have been found to posses the pharmacological activities such as antimalarial, anticancer, antibacterial (Venugopal & Jayashree, 2008), antifungal (Pandey et al., 2003), antitubercular (Bhat et al., 2005), anti-inflammatoryand antimicrobial (Wadher et al., 2009) properties.
The crystal structures of a number of Schiff bases compounds have also been determined. Herein, we report on the synthesis and crystal structure of a new Schiff bases compound, prepared by the reaction of 5-chloro-2-hydroxybenzaldehyde with 4-(3,5-dichloropyridin-2-yloxy) benzenamine.
In the title molecule (Fig. 1), the C8-benzene ring forms dihedral angles of 8.5 (2)° and 70.6 (1)° with the chlorophenol and dichloropyridine rings, respectively. The title molecule exists in trans configuration with respect to the C7=N1 bond [C7=N1 = 1.275 (3) Å]. In the crystal packing, π-π stacking interactions between the centroid of C1—C6 (Cg1) and C8—C13 (Cg2) benzene rings, with Cg1···Cg2i distance of 3.792 (2) Å [symmetry code: (i) -x, 1 - y, 2 - z] are observed. N2/C14—C18 (Cg3)···Cg3ii distance of 3.656 (1)Å [symmetry code: (ii), 1 - x,1 - y,1 - z]. The molecular structure is stabilized by an intramolecular O–H···N hydrogen bond, which generates an S(6) ring motif (Table 1). No significant intermolecular hydrogen bonds are observed.