Abstract
The molecular geometry of the title compound, C17H18N2O2, displays an E configuration with respect to the azo group. The dihedral angle between the aromatic rings is 10.39 (4)°. In the molecule, an intramolecular O—H⋯O hydrogen bond generates an S(6) ring motif.
Related literature
For general background to azo compounds, see: Russ & Tappe (1994 ▶); Tsuda et al. (2000 ▶). For bond-length data, see: Allen et al. (1987 ▶); Deveci et al. (2005 ▶); Karadayı et al., (2006 ▶); El-Ghamry et al. (2008 ▶); Albayrak et al., 2009 ▶; Yazıcı et al. (2010 ▶).
Experimental
Crystal data
C17H18N2O2
M r = 282.33
Monoclinic,
a = 14.8315 (5) Å
b = 7.5573 (2) Å
c = 13.5020 (4) Å
β = 102.578 (3)°
V = 1477.07 (8) Å3
Z = 4
Mo Kα radiation
μ = 0.08 mm−1
T = 150 K
0.75 × 0.47 × 0.21 mm
Data collection
Stoe IPDS II diffractometer
Absorption correction: integration (X-RED32; Stoe & Cie, 2002 ▶) T min = 0.946, T max = 0.984
21625 measured reflections
3054 independent reflections
2680 reflections with I > 2σ(I)
R int = 0.039
Refinement
R[F 2 > 2σ(F 2)] = 0.035
wR(F 2) = 0.097
S = 1.04
3054 reflections
195 parameters
H atoms treated by a mixture of independent and constrained refinement
Δρmax = 0.21 e Å−3
Δρmin = −0.16 e Å−3
Data collection: X-AREA (Stoe & Cie, 2002 ▶); cell refinement: X-AREA; data reduction: X-RED32 (Stoe & Cie, 2002 ▶); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); 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 ▶).
Supplementary Material
Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536811004910/bh2335sup1.cif
Structure factors: contains datablocks I. DOI: 10.1107/S1600536811004910/bh2335Isup2.hkl
Additional supplementary materials: crystallographic information; 3D view; checkCIF report
Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| O1—H1⋯O2 | 0.921 (19) | 1.675 (18) | 2.5365 (13) | 154.3 (16) |
Acknowledgments
The authors wish to acknowledge the Faculty of Arts and Sciences, Ondokuz Mayıs University, Turkey, for the use of the Stoe IPDS II diffractometer (purchased under grant No. F279 of the University Research Fund).
supplementary crystallographic information
Comment
Azo colorants, which are characterized by one or more azo bonds, are the most versatile class of dyes. They are used in textiles, printing, cosmetics, drugs and other consumer goods (Russ & Tappe, 1994; Tsuda et al., 2000).
A view of a molecule of the title compound, together with the atom-numbering scheme, is shown in Fig. 1. The title molecule adopts the E configuration with respect to N═N bridge and the C1—N1—N2—C9 torsion angle is -178.33 (8)°. The A/B and B/C dihedral angles between the A (C1···C6), B (C9···14) and C (C12/C15/C16/C17) fragments are 10.39 (4) and 76.04 (8)°, respectively.
The N1—C1 and N2—C9 bond lengths of 1.4203 (12) and 1.4271 (12) Å, respectively, indicate single-bond character, whereas the N1—N2 bond length of 1.2572 (12) Å indicates double-bond character. In the molecule, all bond lengths are in good agreement with those reported for other azo compounds (Allen et al., 1987; Deveci et al., 2005; El-Ghamry et al., 2008; Albayrak et al., 2009; Yazıcı et al., 2010; Karadayı et al., 2006). There is a strong intra-molecular hydrogen bond of 2.5365 (13) Å between atoms O1 and O2. The crystal packing is controlled by dipole-dipole and van der Waals interactions, and molecules are stacked along crystallographic [010] direction.
Experimental
A mixture of 4-propylaniline (1.05 g, 7.8 mmol), water (20 ml) and concentrated hydrochloric acid (1.97 ml, 23.4 mmol) was stirred until a clear solution was obtained. This solution was cooled down to 0–5 °C and a solution of sodium nitrite (0.75 g 7.8 mmol) in water was added dropwise while the temperature was maintained below 5 °C. The resulting mixture was stirred for 30 min in an ice bath. 2-Hydroxyacetophenone (1.067 g, 7.8 mmol, solution at pH 9) was gradually added to a cooled solution of 4-propylbenzenediazonium chloride, prepared as described above, and the resulting mixture was stirred at 0–5 °C for 2 h in an ice bath. The product was recrystallized from ethanol to obtain solid (E)-2-acetyl-4-(4-propylphenyldiazenyl)phenol. Crystals were obtained after one day by slow evaporation from acetic acid (yield 45%, m.p. = 350–352 K).
Refinement
All C-bonded H atoms were positioned with idealized geometry using a riding model, with C—H = 0.93–0.97 Å. Hydroxyl H atom H1 was found in a difference map and refined freely. All H atoms were refined with Uiso=1.2Ueq(parent atom) or Uiso=1.5Ueq(parent atom)
Figures
Fig. 1.
An ORTEP view of the title compound, with the atom-numbering scheme and 30% probability displacement ellipsoids.
Crystal data
| C17H18N2O2 | F(000) = 600 |
| Mr = 282.33 | Dx = 1.270 Mg m−3 |
| Monoclinic, P21/c | Melting point: 350 K |
| Hall symbol: -P 2ybc | Mo Kα radiation, λ = 0.71073 Å |
| a = 14.8315 (5) Å | Cell parameters from 29224 reflections |
| b = 7.5573 (2) Å | θ = 1.5–28.0° |
| c = 13.5020 (4) Å | µ = 0.08 mm−1 |
| β = 102.578 (3)° | T = 150 K |
| V = 1477.07 (8) Å3 | Prism, brown |
| Z = 4 | 0.75 × 0.47 × 0.21 mm |
Data collection
| Stoe IPDS II diffractometer | 3054 independent reflections |
| Radiation source: fine-focus sealed tube | 2680 reflections with I > 2σ(I) |
| graphite | Rint = 0.039 |
| Detector resolution: 6.67 pixels mm-1 | θmax = 26.5°, θmin = 2.8° |
| ω scans | h = −18→18 |
| Absorption correction: integration (X-RED32; Stoe & Cie, 2002) | k = −9→9 |
| Tmin = 0.946, Tmax = 0.984 | l = −16→16 |
| 21625 measured reflections |
Refinement
| 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)] = 0.035 | Hydrogen site location: inferred from neighbouring sites |
| wR(F2) = 0.097 | H atoms treated by a mixture of independent and constrained refinement |
| S = 1.04 | w = 1/[σ2(Fo2) + (0.0487P)2 + 0.2885P] where P = (Fo2 + 2Fc2)/3 |
| 3054 reflections | (Δ/σ)max < 0.001 |
| 195 parameters | Δρmax = 0.21 e Å−3 |
| 0 restraints | Δρmin = −0.16 e Å−3 |
| 0 constraints |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2)
| x | y | z | Uiso*/Ueq | ||
| C1 | 0.47997 (7) | 0.68823 (13) | 0.36509 (7) | 0.0259 (2) | |
| C2 | 0.50206 (7) | 0.61432 (14) | 0.27782 (8) | 0.0288 (2) | |
| H2 | 0.5600 | 0.5644 | 0.2815 | 0.035* | |
| C3 | 0.43876 (7) | 0.61552 (14) | 0.18743 (8) | 0.0310 (2) | |
| H3 | 0.4540 | 0.5670 | 0.1299 | 0.037* | |
| C4 | 0.35131 (7) | 0.68914 (14) | 0.18103 (8) | 0.0293 (2) | |
| C5 | 0.32685 (7) | 0.76156 (13) | 0.26807 (7) | 0.0264 (2) | |
| C6 | 0.39293 (7) | 0.75846 (13) | 0.35970 (7) | 0.0260 (2) | |
| H6 | 0.3780 | 0.8045 | 0.4180 | 0.031* | |
| C7 | 0.23300 (7) | 0.83175 (13) | 0.26066 (8) | 0.0287 (2) | |
| C8 | 0.20412 (7) | 0.89985 (15) | 0.35252 (8) | 0.0319 (2) | |
| H8A | 0.1425 | 0.9460 | 0.3335 | 0.048* | |
| H8B | 0.2455 | 0.9921 | 0.3829 | 0.048* | |
| H8C | 0.2058 | 0.8053 | 0.4004 | 0.048* | |
| C9 | 0.68461 (7) | 0.65001 (13) | 0.55710 (7) | 0.0253 (2) | |
| C10 | 0.65886 (7) | 0.69262 (14) | 0.64747 (8) | 0.0281 (2) | |
| H10 | 0.5984 | 0.7262 | 0.6467 | 0.034* | |
| C11 | 0.72316 (7) | 0.68489 (14) | 0.73810 (8) | 0.0290 (2) | |
| H11 | 0.7055 | 0.7149 | 0.7980 | 0.035* | |
| C12 | 0.81431 (7) | 0.63289 (13) | 0.74182 (8) | 0.0277 (2) | |
| C13 | 0.83931 (7) | 0.59345 (15) | 0.65066 (8) | 0.0310 (2) | |
| H13 | 0.8999 | 0.5611 | 0.6513 | 0.037* | |
| C14 | 0.77553 (7) | 0.60153 (14) | 0.55917 (8) | 0.0298 (2) | |
| H14 | 0.7934 | 0.5746 | 0.4991 | 0.036* | |
| C15 | 0.88314 (7) | 0.61869 (15) | 0.84173 (8) | 0.0323 (2) | |
| H15A | 0.9176 | 0.5094 | 0.8424 | 0.039* | |
| H15B | 0.8498 | 0.6120 | 0.8959 | 0.039* | |
| C16 | 0.95106 (7) | 0.77208 (15) | 0.86325 (8) | 0.0332 (2) | |
| H16A | 0.9171 | 0.8825 | 0.8588 | 0.040* | |
| H16B | 0.9881 | 0.7742 | 0.8122 | 0.040* | |
| C17 | 1.01453 (8) | 0.75689 (16) | 0.96802 (8) | 0.0364 (3) | |
| H17A | 1.0562 | 0.8557 | 0.9791 | 0.055* | |
| H17B | 1.0492 | 0.6489 | 0.9722 | 0.055* | |
| H17C | 0.9782 | 0.7565 | 1.0188 | 0.055* | |
| N1 | 0.54195 (6) | 0.69552 (12) | 0.46137 (6) | 0.0276 (2) | |
| N2 | 0.62283 (6) | 0.64756 (12) | 0.45996 (6) | 0.0276 (2) | |
| O1 | 0.29175 (6) | 0.68415 (12) | 0.09043 (6) | 0.0392 (2) | |
| O2 | 0.17695 (6) | 0.83191 (12) | 0.17831 (6) | 0.0416 (2) | |
| H1 | 0.2391 (13) | 0.734 (2) | 0.1040 (13) | 0.074 (5)* |
Atomic displacement parameters (Å2)
| U11 | U22 | U33 | U12 | U13 | U23 | |
| C1 | 0.0254 (5) | 0.0280 (5) | 0.0231 (5) | −0.0024 (4) | 0.0022 (4) | 0.0021 (4) |
| C2 | 0.0267 (5) | 0.0311 (5) | 0.0286 (5) | −0.0007 (4) | 0.0062 (4) | 0.0006 (4) |
| C3 | 0.0357 (6) | 0.0334 (5) | 0.0244 (5) | −0.0029 (4) | 0.0076 (4) | −0.0017 (4) |
| C4 | 0.0333 (5) | 0.0295 (5) | 0.0219 (5) | −0.0040 (4) | −0.0010 (4) | 0.0019 (4) |
| C5 | 0.0271 (5) | 0.0260 (5) | 0.0240 (5) | −0.0016 (4) | 0.0012 (4) | 0.0025 (4) |
| C6 | 0.0265 (5) | 0.0276 (5) | 0.0227 (5) | −0.0019 (4) | 0.0028 (4) | 0.0002 (4) |
| C7 | 0.0279 (5) | 0.0260 (5) | 0.0283 (5) | −0.0010 (4) | −0.0024 (4) | 0.0037 (4) |
| C8 | 0.0261 (5) | 0.0347 (6) | 0.0330 (6) | 0.0025 (4) | 0.0023 (4) | 0.0038 (4) |
| C9 | 0.0239 (5) | 0.0255 (5) | 0.0250 (5) | −0.0010 (4) | 0.0019 (4) | 0.0016 (4) |
| C10 | 0.0228 (5) | 0.0324 (5) | 0.0291 (5) | 0.0007 (4) | 0.0053 (4) | 0.0017 (4) |
| C11 | 0.0282 (5) | 0.0331 (5) | 0.0253 (5) | −0.0022 (4) | 0.0050 (4) | 0.0013 (4) |
| C12 | 0.0266 (5) | 0.0254 (5) | 0.0285 (5) | −0.0028 (4) | 0.0003 (4) | 0.0037 (4) |
| C13 | 0.0226 (5) | 0.0343 (5) | 0.0344 (6) | 0.0035 (4) | 0.0029 (4) | 0.0005 (4) |
| C14 | 0.0268 (5) | 0.0343 (5) | 0.0281 (5) | 0.0024 (4) | 0.0057 (4) | −0.0016 (4) |
| C15 | 0.0298 (5) | 0.0336 (6) | 0.0297 (5) | −0.0012 (4) | −0.0019 (4) | 0.0058 (4) |
| C16 | 0.0316 (5) | 0.0325 (5) | 0.0311 (5) | −0.0010 (4) | −0.0032 (4) | 0.0037 (4) |
| C17 | 0.0321 (6) | 0.0419 (6) | 0.0311 (6) | −0.0022 (5) | −0.0019 (4) | 0.0017 (5) |
| N1 | 0.0236 (4) | 0.0315 (4) | 0.0259 (4) | 0.0001 (3) | 0.0015 (3) | 0.0012 (3) |
| N2 | 0.0238 (4) | 0.0314 (4) | 0.0265 (4) | 0.0001 (3) | 0.0026 (3) | 0.0014 (3) |
| O1 | 0.0409 (5) | 0.0493 (5) | 0.0220 (4) | 0.0021 (4) | −0.0050 (3) | −0.0028 (3) |
| O2 | 0.0359 (4) | 0.0484 (5) | 0.0326 (4) | 0.0095 (4) | −0.0100 (3) | −0.0021 (4) |
Geometric parameters (Å, °)
| C1—C6 | 1.3830 (14) | C10—C11 | 1.3792 (14) |
| C1—C2 | 1.4057 (14) | C10—H10 | 0.9300 |
| C1—N1 | 1.4203 (12) | C11—C12 | 1.3982 (14) |
| C2—C3 | 1.3682 (14) | C11—H11 | 0.9300 |
| C2—H2 | 0.9300 | C12—C13 | 1.3930 (15) |
| C3—C4 | 1.3965 (15) | C12—C15 | 1.5079 (13) |
| C3—H3 | 0.9300 | C13—C14 | 1.3840 (14) |
| C4—O1 | 1.3444 (12) | C13—H13 | 0.9300 |
| C4—C5 | 1.4135 (15) | C14—H14 | 0.9300 |
| C5—C6 | 1.4013 (13) | C15—C16 | 1.5217 (15) |
| C5—C7 | 1.4725 (14) | C15—H15A | 0.9700 |
| C6—H6 | 0.9300 | C15—H15B | 0.9700 |
| C7—O2 | 1.2349 (12) | C16—C17 | 1.5233 (14) |
| C7—C8 | 1.4893 (15) | C16—H16A | 0.9700 |
| C8—H8A | 0.9600 | C16—H16B | 0.9700 |
| C8—H8B | 0.9600 | C17—H17A | 0.9600 |
| C8—H8C | 0.9600 | C17—H17B | 0.9600 |
| C9—C14 | 1.3917 (14) | C17—H17C | 0.9600 |
| C9—C10 | 1.3933 (14) | N1—N2 | 1.2572 (12) |
| C9—N2 | 1.4271 (12) | O1—H1 | 0.919 (19) |
| C6—C1—C2 | 119.58 (9) | C10—C11—C12 | 121.34 (10) |
| C6—C1—N1 | 116.35 (9) | C10—C11—H11 | 119.3 |
| C2—C1—N1 | 124.06 (9) | C12—C11—H11 | 119.3 |
| C3—C2—C1 | 120.34 (10) | C13—C12—C11 | 118.02 (9) |
| C3—C2—H2 | 119.8 | C13—C12—C15 | 121.11 (9) |
| C1—C2—H2 | 119.8 | C11—C12—C15 | 120.87 (9) |
| C2—C3—C4 | 120.37 (10) | C14—C13—C12 | 121.16 (9) |
| C2—C3—H3 | 119.8 | C14—C13—H13 | 119.4 |
| C4—C3—H3 | 119.8 | C12—C13—H13 | 119.4 |
| O1—C4—C3 | 117.55 (9) | C13—C14—C9 | 120.04 (10) |
| O1—C4—C5 | 122.04 (10) | C13—C14—H14 | 120.0 |
| C3—C4—C5 | 120.39 (9) | C9—C14—H14 | 120.0 |
| C6—C5—C4 | 118.09 (9) | C12—C15—C16 | 114.06 (8) |
| C6—C5—C7 | 122.34 (9) | C12—C15—H15A | 108.7 |
| C4—C5—C7 | 119.54 (9) | C16—C15—H15A | 108.7 |
| C1—C6—C5 | 121.21 (9) | C12—C15—H15B | 108.7 |
| C1—C6—H6 | 119.4 | C16—C15—H15B | 108.7 |
| C5—C6—H6 | 119.4 | H15A—C15—H15B | 107.6 |
| O2—C7—C5 | 120.17 (10) | C15—C16—C17 | 111.68 (9) |
| O2—C7—C8 | 119.36 (9) | C15—C16—H16A | 109.3 |
| C5—C7—C8 | 120.46 (9) | C17—C16—H16A | 109.3 |
| C7—C8—H8A | 109.5 | C15—C16—H16B | 109.3 |
| C7—C8—H8B | 109.5 | C17—C16—H16B | 109.3 |
| H8A—C8—H8B | 109.5 | H16A—C16—H16B | 107.9 |
| C7—C8—H8C | 109.5 | C16—C17—H17A | 109.5 |
| H8A—C8—H8C | 109.5 | C16—C17—H17B | 109.5 |
| H8B—C8—H8C | 109.5 | H17A—C17—H17B | 109.5 |
| C14—C9—C10 | 119.50 (9) | C16—C17—H17C | 109.5 |
| C14—C9—N2 | 116.13 (9) | H17A—C17—H17C | 109.5 |
| C10—C9—N2 | 124.35 (9) | H17B—C17—H17C | 109.5 |
| C11—C10—C9 | 119.92 (9) | N2—N1—C1 | 113.86 (8) |
| C11—C10—H10 | 120.0 | N1—N2—C9 | 113.96 (8) |
| C9—C10—H10 | 120.0 | C4—O1—H1 | 103.0 (11) |
| C6—C1—C2—C3 | 1.58 (15) | N2—C9—C10—C11 | 177.63 (9) |
| N1—C1—C2—C3 | −178.81 (9) | C9—C10—C11—C12 | −0.73 (15) |
| C1—C2—C3—C4 | −0.41 (15) | C10—C11—C12—C13 | 1.73 (15) |
| C2—C3—C4—O1 | −179.12 (9) | C10—C11—C12—C15 | −177.81 (9) |
| C2—C3—C4—C5 | −0.68 (16) | C11—C12—C13—C14 | −1.41 (15) |
| O1—C4—C5—C6 | 178.96 (9) | C15—C12—C13—C14 | 178.13 (9) |
| C3—C4—C5—C6 | 0.59 (15) | C12—C13—C14—C9 | 0.11 (16) |
| O1—C4—C5—C7 | 0.93 (15) | C10—C9—C14—C13 | 0.93 (15) |
| C3—C4—C5—C7 | −177.43 (9) | N2—C9—C14—C13 | −177.46 (9) |
| C2—C1—C6—C5 | −1.67 (15) | C13—C12—C15—C16 | 77.33 (13) |
| N1—C1—C6—C5 | 178.69 (9) | C11—C12—C15—C16 | −103.14 (12) |
| C4—C5—C6—C1 | 0.59 (15) | C12—C15—C16—C17 | 176.16 (9) |
| C7—C5—C6—C1 | 178.56 (9) | C6—C1—N1—N2 | −172.82 (9) |
| C6—C5—C7—O2 | 180.00 (10) | C2—C1—N1—N2 | 7.55 (14) |
| C4—C5—C7—O2 | −2.06 (15) | C1—N1—N2—C9 | −178.33 (8) |
| C6—C5—C7—C8 | −1.21 (15) | C14—C9—N2—N1 | −178.69 (9) |
| C4—C5—C7—C8 | 176.72 (9) | C10—C9—N2—N1 | 3.01 (14) |
| C14—C9—C10—C11 | −0.62 (15) |
Hydrogen-bond geometry (Å, °)
| D—H···A | D—H | H···A | D···A | D—H···A |
| O1—H1···O2 | 0.921 (19) | 1.675 (18) | 2.5365 (13) | 154.3 (16) |
Footnotes
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: BH2335).
References
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Associated Data
This section collects any data citations, data availability statements, or supplementary materials included in this article.
Supplementary Materials
Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536811004910/bh2335sup1.cif
Structure factors: contains datablocks I. DOI: 10.1107/S1600536811004910/bh2335Isup2.hkl
Additional supplementary materials: crystallographic information; 3D view; checkCIF report

