organic compounds
2-((E)-{[3-(1H-Imidazol-1-yl)propyl]imino}methyl)-4-[(E)-(4-methylphenyl)diazenyl]phenol
aLCBAE, Equipe Chimie Moléculaire et Molécules Bioactives, Université Moulay Ismail, Faculté des Sciences, Meknès, Morocco, bUniversité d Angers, CNRS UMR 6200, Laboratoire MOLTECH-Anjou, 2 bd Lavoisier, 49045 Angers Cedex, France, and cLaboratoire de Chimie des Matériaux et Biotechnologie des Produits Naturels, E.Ma.Me.P.S., Université Moulay Ismail, Faculté des Sciences, Meknès, Morocco
*Correspondence e-mail: kyamni@hotmail.com
In the title compound, C20H21N5O, the dihedral angles between the central phenol ring and pendant toluyl and imidazole rings are 3.20 (16) and 81.44 (14)°, respectively; the dihedral angle between the pendant rings is 84.39 (16)°. An intramolecular O—H⋯N hydrogen bond occurs. A Hirshfeld fingerprint analysis indicates that H⋯H contacts account for 48.6% of the surface.
Keywords: crystal structure; hydrogen bonding; offset H⋯H interactions; Hirshfeld surface analysis.
CCDC reference: 1889270
Structure description
As a continuation of our studies of compounds based on azo Schiff base derivatives (Slassi et al., 2017), we report herein the synthesis and structure of the title compound.
The molecular structure of the title compound is shown in Fig. 1. The bond lengths and angles of the imidazol moiety are comparable with those reported for similar compounds (Slassi et al., 2017). The dihedral angles between the phenol ring and pendant toluyl and imidazole rings are 3.20 (16) and 81.44 (14)°, respectively; the dihedral angle between the pendant rings is 84.39 (16)°. The N1—N2 and N3—C14 bond lengths [1.174 (4) and 1.272 (4) Å, respectively] confirm their double-bond character, whereas the N4—C18 and N4—C19 values [1.347 (3) and 1.370 (3) Å, respectively] are shorter than (nominal) isolated C—N bonds (1.46 Å) due to conjugation. An intramolecular O—H⋯N hydrogen bond occurs (Table 1) but no directional interactions beyond van der Waals' contacts could be identified in the packing (Fig. 2).
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Two-dimensional Hirshfeld fingerprint plots (McKinnon et al., 2007) indicate that 48.6% of the surface is due to H⋯H contacts, followed by C⋯H, N⋯H and O⋯H interactions, which contribute 28.5, 15.2 and 6.1%, respectively.
Synthesis and crystallization
A diazonium-salt solution was prepared by dissolving p-toluidine amine (1.23 g, 0.01 mol) in a mixture of water and concentrated hydrochloric acid (8 and 3 ml, respectively). The resulting solution was cooled to 273 K, treated with aqueous (1.0 M) sodium nitrate (15 ml) dropwise and stirred for 15 min. Salicylaldehyde (2.2 g, 0.010 mol) was dissolved in 10% sodium hydroxide (50 ml). The diazonium solution was then added dropwise to initiate the coupling reaction. After the mixture had been stirred for 1 h at 273–278 K, the precipitate was filtered off. Crystals were obtained by recrystallization from ethanol solution. N-(3-Aminopropyl)imidazole (4.0 mmol) was added into a methanol solution (30 ml) of 2-hydroxy-5-(p-tolyldiazenyl)benzaldehyde (4.0 mmol) prepared in the first step of the reaction. The mixture was refluxed for 2 h and cooled to room temperature. The solvent was removed on a rotatory evaporator and the orange product was rinsed and recrystallized from mixed solvents of methanol and ether to give orange crystals after one week.
Refinement
Crystal data, data collection and structure .
details are summarized in Table 2Structural data
CCDC reference: 1889270
https://doi.org/10.1107/S2414314619000361/hb4279sup1.cif
contains datablock I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2414314619000361/hb4279Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S2414314619000361/hb4279Isup3.cml
Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXT (Sheldrick, 2015a); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015b); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: publCIF (Westrip, 2010).C20H21N5O | F(000) = 736 |
Mr = 347.42 | Dx = 1.259 Mg m−3 |
Monoclinic, P2/n | Cu Kα radiation, λ = 1.54184 Å |
a = 12.2410 (4) Å | Cell parameters from 235 reflections |
b = 5.9386 (2) Å | θ = 0.7–32.0° |
c = 25.2112 (9) Å | µ = 0.65 mm−1 |
β = 90.317 (3)° | T = 293 K |
V = 1832.69 (11) Å3 | Prism, orange |
Z = 4 | 0.35 × 0.22 × 0.13 mm |
Agilent SuperNova CCD diffractometer | Rint = 0.016 |
Radiation source: fine-focus sealed tube | θmax = 73.5°, θmin = 4.0° |
ω and φ scans | h = −14→14 |
5548 measured reflections | k = −4→7 |
3487 independent reflections | l = −30→25 |
3037 reflections with I > 2σ(I) |
Refinement on F2 | Hydrogen site location: inferred from neighbouring sites |
Least-squares matrix: full | H-atom parameters constrained |
R[F2 > 2σ(F2)] = 0.084 | w = 1/[σ2(Fo2) + (0.1176P)2 + 1.9097P] where P = (Fo2 + 2Fc2)/3 |
wR(F2) = 0.245 | (Δ/σ)max < 0.001 |
S = 1.08 | Δρmax = 1.02 e Å−3 |
3487 reflections | Δρmin = −0.67 e Å−3 |
236 parameters | Extinction correction: SHELXL2014/7 (Sheldrick 2014, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
0 restraints | Extinction coefficient: 0.0012 (6) |
Primary atom site location: dual |
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. Hydrogen atoms were placed in calculated positions and treated as riding: (O—H = 0.82 Å, N—H = and C—H = 0.93 to 0.97 Å) and refined using a riding model, with Uiso(H) = 1.2Ueq(C) and 1.5Ueq(O). |
x | y | z | Uiso*/Ueq | ||
C13 | 0.8079 (4) | 0.4904 (8) | 0.15663 (17) | 0.0903 (14) | |
H13A | 0.7426 | 0.5753 | 0.1499 | 0.135* | |
H13B | 0.8425 | 0.4547 | 0.1236 | 0.135* | |
H13C | 0.7897 | 0.3537 | 0.1749 | 0.135* | |
C14 | 1.4876 (2) | 1.0267 (5) | 0.40967 (12) | 0.0478 (7) | |
H14 | 1.5059 | 0.8854 | 0.3965 | 0.057* | |
C15 | 1.6512 (2) | 1.0082 (5) | 0.45962 (14) | 0.0530 (8) | |
H15A | 1.6768 | 0.9101 | 0.4315 | 0.064* | |
H15B | 1.6357 | 0.9160 | 0.4904 | 0.064* | |
C16 | 1.7384 (2) | 1.1766 (5) | 0.47322 (12) | 0.0463 (7) | |
H16A | 1.7086 | 1.2866 | 0.4976 | 0.056* | |
H16B | 1.7595 | 1.2556 | 0.4412 | 0.056* | |
C17 | 1.8392 (2) | 1.0701 (5) | 0.49814 (12) | 0.0495 (7) | |
H17A | 1.8915 | 1.1870 | 0.5070 | 0.059* | |
H17B | 1.8189 | 0.9943 | 0.5307 | 0.059* | |
C18 | 1.8979 (2) | 0.6838 (4) | 0.46977 (10) | 0.0405 (6) | |
H18 | 1.8738 | 0.6112 | 0.5002 | 0.049* | |
C19 | 1.9335 (2) | 0.9502 (5) | 0.41319 (11) | 0.0476 (7) | |
H19 | 1.9400 | 1.0892 | 0.3965 | 0.057* | |
C20 | 1.9650 (2) | 0.7472 (5) | 0.39414 (11) | 0.0501 (7) | |
H20 | 1.9972 | 0.7252 | 0.3612 | 0.060* | |
N3 | 1.55155 (17) | 1.1238 (4) | 0.44235 (11) | 0.0484 (6) | |
N4 | 1.89023 (16) | 0.9079 (4) | 0.46217 (8) | 0.0380 (5) | |
N6 | 1.9431 (2) | 0.5788 (4) | 0.42948 (9) | 0.0468 (6) | |
O1 | 1.42088 (16) | 1.4663 (3) | 0.44393 (9) | 0.0535 (6) | |
H1 | 1.4761 | 1.3929 | 0.4505 | 0.080* | |
C1 | 0.9844 (3) | 0.5444 (6) | 0.20574 (12) | 0.0658 (9) | |
H2 | 1.0071 | 0.4026 | 0.1947 | 0.079* | |
C2 | 0.8845 (3) | 0.6273 (6) | 0.19032 (12) | 0.0644 (9) | |
C3 | 0.8533 (4) | 0.8425 (7) | 0.20665 (14) | 0.0763 (11) | |
H3 | 0.7858 | 0.8970 | 0.1954 | 0.092* | |
C4 | 0.9149 (4) | 0.9741 (8) | 0.23747 (15) | 0.0763 (11) | |
H4 | 0.8913 | 1.1168 | 0.2474 | 0.092* | |
C5 | 1.0114 (4) | 0.8946 (6) | 0.25356 (12) | 0.0703 (11) | |
C6 | 1.0528 (3) | 0.6788 (8) | 0.23901 (13) | 0.0785 (12) | |
H6 | 1.1208 | 0.6285 | 0.2506 | 0.094* | |
C7 | 1.3171 (2) | 1.0200 (5) | 0.35781 (11) | 0.0489 (7) | |
H7 | 1.3370 | 0.8779 | 0.3457 | 0.059* | |
C8 | 1.2196 (2) | 1.1128 (6) | 0.34087 (11) | 0.0520 (7) | |
C9 | 1.1896 (2) | 1.3256 (6) | 0.35955 (12) | 0.0556 (8) | |
H9 | 1.1237 | 1.3890 | 0.3486 | 0.067* | |
C10 | 1.2569 (2) | 1.4428 (5) | 0.39417 (12) | 0.0511 (7) | |
H10 | 1.2358 | 1.5839 | 0.4065 | 0.061* | |
C11 | 1.3862 (2) | 1.1332 (5) | 0.39245 (11) | 0.0433 (6) | |
C12 | 1.3566 (2) | 1.3504 (5) | 0.41079 (11) | 0.0450 (6) | |
N1 | 1.0795 (3) | 1.0496 (5) | 0.28969 (13) | 0.0807 (11) | |
N2 | 1.1576 (2) | 0.9503 (6) | 0.30336 (11) | 0.0681 (9) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C13 | 0.116 (4) | 0.081 (3) | 0.074 (2) | 0.007 (3) | −0.042 (2) | −0.015 (2) |
C14 | 0.0355 (13) | 0.0398 (14) | 0.0683 (18) | 0.0006 (11) | 0.0102 (12) | −0.0050 (13) |
C15 | 0.0353 (14) | 0.0440 (15) | 0.080 (2) | 0.0054 (12) | 0.0043 (13) | 0.0064 (14) |
C16 | 0.0420 (14) | 0.0410 (14) | 0.0557 (16) | 0.0095 (11) | −0.0084 (12) | −0.0055 (12) |
C17 | 0.0467 (15) | 0.0449 (15) | 0.0568 (16) | 0.0099 (12) | −0.0092 (12) | −0.0075 (13) |
C18 | 0.0407 (13) | 0.0396 (13) | 0.0411 (13) | 0.0024 (10) | 0.0025 (10) | 0.0091 (10) |
C19 | 0.0426 (14) | 0.0500 (16) | 0.0503 (15) | 0.0007 (12) | 0.0023 (11) | 0.0206 (13) |
C20 | 0.0462 (15) | 0.0629 (18) | 0.0412 (14) | 0.0048 (13) | 0.0065 (11) | 0.0100 (13) |
N3 | 0.0309 (11) | 0.0414 (12) | 0.0728 (15) | 0.0034 (9) | 0.0024 (10) | −0.0025 (11) |
N4 | 0.0321 (10) | 0.0372 (11) | 0.0447 (11) | 0.0030 (8) | −0.0030 (8) | 0.0064 (9) |
N6 | 0.0483 (13) | 0.0435 (13) | 0.0486 (13) | 0.0037 (10) | 0.0030 (10) | 0.0032 (10) |
O1 | 0.0425 (10) | 0.0406 (11) | 0.0772 (14) | 0.0046 (8) | −0.0049 (9) | −0.0094 (10) |
C1 | 0.091 (3) | 0.067 (2) | 0.0394 (15) | −0.0114 (19) | −0.0074 (15) | 0.0012 (14) |
C2 | 0.089 (2) | 0.065 (2) | 0.0395 (15) | −0.0021 (18) | −0.0112 (15) | −0.0008 (14) |
C3 | 0.109 (3) | 0.068 (2) | 0.0517 (19) | −0.005 (2) | 0.0041 (19) | −0.0053 (17) |
C4 | 0.095 (3) | 0.074 (2) | 0.060 (2) | −0.004 (2) | 0.005 (2) | −0.0018 (19) |
C5 | 0.118 (3) | 0.058 (2) | 0.0353 (15) | −0.033 (2) | 0.0192 (17) | −0.0083 (14) |
C6 | 0.074 (2) | 0.121 (3) | 0.0412 (16) | −0.019 (2) | −0.0011 (15) | 0.032 (2) |
C7 | 0.0419 (14) | 0.0543 (16) | 0.0507 (15) | −0.0049 (12) | 0.0113 (12) | −0.0046 (13) |
C8 | 0.0432 (15) | 0.0693 (19) | 0.0436 (14) | −0.0089 (14) | 0.0083 (11) | 0.0039 (14) |
C9 | 0.0393 (14) | 0.077 (2) | 0.0506 (16) | 0.0053 (14) | 0.0014 (12) | 0.0181 (15) |
C10 | 0.0449 (15) | 0.0520 (16) | 0.0566 (17) | 0.0102 (13) | 0.0075 (12) | 0.0098 (13) |
C11 | 0.0327 (12) | 0.0440 (14) | 0.0532 (15) | −0.0010 (10) | 0.0075 (11) | −0.0006 (12) |
C12 | 0.0370 (13) | 0.0450 (15) | 0.0531 (15) | 0.0013 (11) | 0.0055 (11) | 0.0044 (12) |
N1 | 0.106 (3) | 0.0599 (18) | 0.076 (2) | 0.0242 (18) | 0.0444 (19) | 0.0206 (16) |
N2 | 0.0388 (13) | 0.099 (2) | 0.0666 (17) | 0.0065 (14) | 0.0089 (12) | 0.0411 (16) |
C13—C2 | 1.501 (5) | O1—C12 | 1.336 (3) |
C13—H13A | 0.9600 | O1—H1 | 0.8200 |
C13—H13B | 0.9600 | C1—C2 | 1.372 (5) |
C13—H13C | 0.9600 | C1—C6 | 1.427 (5) |
C14—N3 | 1.272 (4) | C1—H2 | 0.9300 |
C14—C11 | 1.457 (4) | C2—C3 | 1.397 (5) |
C14—H14 | 0.9300 | C3—C4 | 1.333 (6) |
C15—N3 | 1.464 (3) | C3—H3 | 0.9300 |
C15—C16 | 1.500 (4) | C4—C5 | 1.333 (6) |
C15—H15A | 0.9700 | C4—H4 | 0.9300 |
C15—H15B | 0.9700 | C5—C6 | 1.426 (6) |
C16—C17 | 1.520 (4) | C5—N1 | 1.537 (5) |
C16—H16A | 0.9700 | C6—H6 | 0.9300 |
C16—H16B | 0.9700 | C7—C8 | 1.381 (4) |
C17—N4 | 1.465 (3) | C7—C11 | 1.386 (4) |
C17—H17A | 0.9700 | C7—H7 | 0.9300 |
C17—H17B | 0.9700 | C8—C9 | 1.399 (5) |
C18—N6 | 1.317 (3) | C8—N2 | 1.547 (5) |
C18—N4 | 1.347 (3) | C9—C10 | 1.385 (5) |
C18—H18 | 0.9300 | C9—H9 | 0.9300 |
C19—C20 | 1.354 (4) | C10—C12 | 1.401 (4) |
C19—N4 | 1.370 (3) | C10—H10 | 0.9300 |
C19—H19 | 0.9300 | C11—C12 | 1.417 (4) |
C20—N6 | 1.367 (4) | N1—N2 | 1.174 (4) |
C20—H20 | 0.9300 | ||
C2—C13—H13A | 109.5 | C18—N6—C20 | 103.9 (2) |
C2—C13—H13B | 109.5 | C12—O1—H1 | 109.5 |
H13A—C13—H13B | 109.5 | C2—C1—C6 | 119.0 (4) |
C2—C13—H13C | 109.5 | C2—C1—H2 | 120.5 |
H13A—C13—H13C | 109.5 | C6—C1—H2 | 120.5 |
H13B—C13—H13C | 109.5 | C1—C2—C3 | 119.3 (4) |
N3—C14—C11 | 121.1 (3) | C1—C2—C13 | 121.2 (4) |
N3—C14—H14 | 119.5 | C3—C2—C13 | 119.4 (4) |
C11—C14—H14 | 119.5 | C4—C3—C2 | 123.6 (4) |
N3—C15—C16 | 110.2 (2) | C4—C3—H3 | 118.2 |
N3—C15—H15A | 109.6 | C2—C3—H3 | 118.2 |
C16—C15—H15A | 109.6 | C3—C4—C5 | 117.8 (4) |
N3—C15—H15B | 109.6 | C3—C4—H4 | 121.1 |
C16—C15—H15B | 109.6 | C5—C4—H4 | 121.1 |
H15A—C15—H15B | 108.1 | C4—C5—C6 | 123.7 (4) |
C15—C16—C17 | 113.1 (2) | C4—C5—N1 | 116.4 (4) |
C15—C16—H16A | 109.0 | C6—C5—N1 | 119.9 (4) |
C17—C16—H16A | 109.0 | C5—C6—C1 | 116.5 (4) |
C15—C16—H16B | 109.0 | C5—C6—H6 | 121.8 |
C17—C16—H16B | 109.0 | C1—C6—H6 | 121.8 |
H16A—C16—H16B | 107.8 | C8—C7—C11 | 121.6 (3) |
N4—C17—C16 | 111.5 (2) | C8—C7—H7 | 119.2 |
N4—C17—H17A | 109.3 | C11—C7—H7 | 119.2 |
C16—C17—H17A | 109.3 | C7—C8—C9 | 119.0 (3) |
N4—C17—H17B | 109.3 | C7—C8—N2 | 111.1 (3) |
C16—C17—H17B | 109.3 | C9—C8—N2 | 129.8 (3) |
H17A—C17—H17B | 108.0 | C10—C9—C8 | 120.7 (3) |
N6—C18—N4 | 112.8 (2) | C10—C9—H9 | 119.7 |
N6—C18—H18 | 123.6 | C8—C9—H9 | 119.7 |
N4—C18—H18 | 123.6 | C9—C10—C12 | 120.4 (3) |
C20—C19—N4 | 105.6 (2) | C9—C10—H10 | 119.8 |
C20—C19—H19 | 127.2 | C12—C10—H10 | 119.8 |
N4—C19—H19 | 127.2 | C7—C11—C12 | 119.4 (3) |
C19—C20—N6 | 111.3 (2) | C7—C11—C14 | 119.5 (3) |
C19—C20—H20 | 124.4 | C12—C11—C14 | 121.1 (3) |
N6—C20—H20 | 124.4 | O1—C12—C10 | 119.6 (3) |
C14—N3—C15 | 119.3 (3) | O1—C12—C11 | 121.5 (2) |
C18—N4—C19 | 106.4 (2) | C10—C12—C11 | 118.9 (3) |
C18—N4—C17 | 126.2 (2) | N2—N1—C5 | 108.1 (3) |
C19—N4—C17 | 127.3 (2) | N1—N2—C8 | 105.2 (3) |
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