organic compounds
2-{(1E)-1-[(3-{(E)-[1-(2-Hydroxy-4-methoxyphenyl)ethylidene]amino}-2,2-dimethylpropyl)imino]ethyl}-5-methoxyphenol
aDepartment of Chemistry, Saveh Branch, Islamic Azad University, Saveh, Iran, bDepartment of Chemistry, K. N. Toosi University of Technology, PO Box, 16315-1618, Tehran, Iran, cDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia, and dChemistry Department, Faculty of Science, King Abdulaziz University, PO Box 80203 Jeddah, Saudi Arabia
*Correspondence e-mail: Edward.Tiekink@gmail.com
Molecules of the title compound, C23H30N2O4, are located on a crystallographic mirror plane. The molecule has a curved shape with the dihedral angle formed between the two benzene rings being 55.26 (5)°. Intramolecular O—H⋯N hydrogen bonds are noted. In the crystal, supramolecular layers are formed in the ac plane owing to the presence of C—H⋯π interactions.
Experimental
Crystal data
|
Refinement
|
Data collection: CrysAlis PRO (Agilent, 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: ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
https://doi.org/10.1107/S1600536811038815/bt5648sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811038815/bt5648Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536811038815/bt5648Isup3.cml
To a stirred ethanolic solution (30 ml) of 2,2-dimethylpropylenediamine (0.102 g, 1 mmol), 2-hydroxy-4-methoxyacetophenone (0.332 g, 2 mmol) was added. The bright-yellow solution was stirred and heated under reflux for 1 h. Crystals were obtained by evaporation of an ethanol solution of the product at room temperature. Yield: 85%; M.pt. 423 K. Selected FT—IR data (cm-1): 3427 ν(O—H), 2929–2965 ν(C—H), 1607 ν(C═N), 1446 ν(C═C), 1022 ν(C—O). 1H NMR (δ): 1.23 (s, 6H, C(CH3)2), 2.31 (s, 6H, OCH3C═ N), 3.47 (s, 4H, NCH2), 3.80 (s, 6H, OCH3), 6.24–7.37 (m, 6H, ArH), 12.35 (s, 2H, OH) p.p.m..
The C-bound H-atoms were placed in calculated positions (C—H 0.93 to 0.97 Å) and were included in the
in the riding model approximation, with Uiso(H) set to 1.2 to 1.5Uequiv(C).The crystallographic investigation of the title compound, (I), was motivated by recent research in Schiff base complexes (Rayati et al., 2007; Rayati et al., 2010). The molecule of (I), Fig. 1, has crystallographically imposed mirror symmetry. The dihedral angle formed between the two benzene rings is 55.26 (5) ° indicating that, overall, the molecule has a curved shape. The presence of an intramolecular O—H···N hydrogen bond is noted, Table 1. The methoxy group is co-planar with the benzene ring to which it is attached as seen in the value of the C7—O2—C4—C3 torsion angle of -3.4 (3) °.
Molecules are assembled into layers in the ac plane through the agency of C—H···π interactions, Table 1 and Fig. 2, formed by methyl-H and the (C1—C6) benzene ring, indicating that the latter is bridging. Layers stack along the b axis, Fig. 3.
For our previous work on Schiff base complexes, see: Rayati et al. (2007, 2010).
Data collection: CrysAlis PRO (Agilent, 2010); cell
CrysAlis PRO (Agilent, 2010); data reduction: CrysAlis PRO (Agilent, 2010); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).C23H30N2O4 | F(000) = 856 |
Mr = 398.49 | Dx = 1.249 Mg m−3 |
Orthorhombic, Pnma | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2n | Cell parameters from 2488 reflections |
a = 10.0764 (7) Å | θ = 2.3–27.5° |
b = 36.069 (2) Å | µ = 0.09 mm−1 |
c = 5.8322 (4) Å | T = 294 K |
V = 2119.7 (2) Å3 | Prism, yellow |
Z = 4 | 0.30 × 0.25 × 0.20 mm |
Agilent SuperNova Dual diffractometer with Atlas detector | 2419 independent reflections |
Radiation source: SuperNova (Mo) X-ray Source | 1952 reflections with I > 2σ(I) |
Mirror monochromator | Rint = 0.039 |
Detector resolution: 10.4041 pixels mm-1 | θmax = 27.6°, θmin = 3.4° |
ω scan | h = −9→13 |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2010) | k = −33→46 |
Tmin = 0.793, Tmax = 1.000 | l = −5→7 |
6816 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)] = 0.055 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.155 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.08 | w = 1/[σ2(Fo2) + (0.0642P)2 + 0.9075P] where P = (Fo2 + 2Fc2)/3 |
2419 reflections | (Δ/σ)max = 0.001 |
141 parameters | Δρmax = 0.23 e Å−3 |
1 restraint | Δρmin = −0.18 e Å−3 |
C23H30N2O4 | V = 2119.7 (2) Å3 |
Mr = 398.49 | Z = 4 |
Orthorhombic, Pnma | Mo Kα radiation |
a = 10.0764 (7) Å | µ = 0.09 mm−1 |
b = 36.069 (2) Å | T = 294 K |
c = 5.8322 (4) Å | 0.30 × 0.25 × 0.20 mm |
Agilent SuperNova Dual diffractometer with Atlas detector | 2419 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2010) | 1952 reflections with I > 2σ(I) |
Tmin = 0.793, Tmax = 1.000 | Rint = 0.039 |
6816 measured reflections |
R[F2 > 2σ(F2)] = 0.055 | 1 restraint |
wR(F2) = 0.155 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.08 | Δρmax = 0.23 e Å−3 |
2419 reflections | Δρmin = −0.18 e Å−3 |
141 parameters |
Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'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 | Occ. (<1) | |
O1 | 0.30246 (15) | 0.64954 (4) | 0.1933 (2) | 0.0531 (4) | |
H1 | 0.354 (3) | 0.6654 (8) | 0.256 (6) | 0.122 (13)* | |
O2 | 0.13785 (15) | 0.53184 (4) | 0.4322 (3) | 0.0574 (4) | |
N1 | 0.46777 (15) | 0.68176 (4) | 0.4452 (3) | 0.0419 (4) | |
C1 | 0.39243 (16) | 0.62163 (5) | 0.5332 (3) | 0.0352 (4) | |
C2 | 0.30646 (17) | 0.62129 (5) | 0.3409 (3) | 0.0372 (4) | |
C3 | 0.22205 (18) | 0.59119 (5) | 0.3013 (3) | 0.0409 (4) | |
H3 | 0.1682 | 0.5908 | 0.1719 | 0.049* | |
C4 | 0.21869 (18) | 0.56202 (5) | 0.4543 (3) | 0.0422 (4) | |
C5 | 0.3005 (2) | 0.56209 (5) | 0.6471 (3) | 0.0477 (5) | |
H5 | 0.2975 | 0.5425 | 0.7506 | 0.057* | |
C6 | 0.38514 (19) | 0.59118 (5) | 0.6829 (3) | 0.0436 (4) | |
H6 | 0.4399 | 0.5908 | 0.8112 | 0.052* | |
C7 | 0.0463 (2) | 0.53147 (6) | 0.2451 (5) | 0.0660 (6) | |
H7A | −0.0043 | 0.5089 | 0.2490 | 0.099* | |
H7B | 0.0942 | 0.5329 | 0.1031 | 0.099* | |
H7C | −0.0125 | 0.5523 | 0.2576 | 0.099* | |
C8 | 0.47861 (17) | 0.65354 (5) | 0.5787 (3) | 0.0360 (4) | |
C9 | 0.5749 (2) | 0.65215 (6) | 0.7746 (4) | 0.0538 (5) | |
H9A | 0.6438 | 0.6701 | 0.7504 | 0.081* | |
H9B | 0.6134 | 0.6278 | 0.7836 | 0.081* | |
H9C | 0.5293 | 0.6576 | 0.9151 | 0.081* | |
C10 | 0.54167 (19) | 0.71600 (5) | 0.4786 (4) | 0.0460 (5) | |
H10A | 0.6219 | 0.7153 | 0.3869 | 0.055* | |
H10B | 0.5674 | 0.7181 | 0.6384 | 0.055* | |
C11 | 0.4589 (2) | 0.7500 | 0.4108 (4) | 0.0342 (5) | |
C12 | 0.4327 (3) | 0.7500 | 0.1527 (4) | 0.0441 (6) | |
H12A | 0.5157 | 0.7500 | 0.0719 | 0.066* | |
H12B | 0.3830 | 0.7717 | 0.1121 | 0.066* | 0.50 |
H12C | 0.3830 | 0.7283 | 0.1121 | 0.066* | 0.50 |
C13 | 0.3269 (3) | 0.7500 | 0.5407 (5) | 0.0493 (7) | |
H13A | 0.3437 | 0.7500 | 0.7027 | 0.074* | |
H13B | 0.2770 | 0.7283 | 0.5005 | 0.074* | 0.50 |
H13C | 0.2770 | 0.7717 | 0.5005 | 0.074* | 0.50 |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0641 (9) | 0.0448 (7) | 0.0504 (8) | −0.0113 (7) | −0.0195 (7) | 0.0126 (6) |
O2 | 0.0598 (9) | 0.0403 (7) | 0.0721 (10) | −0.0103 (7) | −0.0096 (8) | 0.0061 (7) |
N1 | 0.0415 (8) | 0.0358 (7) | 0.0482 (8) | −0.0012 (6) | −0.0100 (7) | 0.0021 (6) |
C1 | 0.0334 (8) | 0.0348 (8) | 0.0375 (8) | 0.0061 (7) | 0.0004 (7) | −0.0005 (7) |
C2 | 0.0387 (9) | 0.0364 (8) | 0.0365 (8) | 0.0052 (7) | −0.0004 (7) | 0.0000 (7) |
C3 | 0.0405 (9) | 0.0397 (9) | 0.0425 (9) | 0.0020 (8) | −0.0043 (8) | −0.0016 (7) |
C4 | 0.0394 (9) | 0.0352 (9) | 0.0518 (10) | 0.0020 (8) | 0.0028 (8) | −0.0021 (8) |
C5 | 0.0526 (11) | 0.0398 (9) | 0.0507 (10) | 0.0033 (9) | −0.0001 (9) | 0.0104 (8) |
C6 | 0.0434 (10) | 0.0439 (9) | 0.0435 (9) | 0.0057 (8) | −0.0071 (8) | 0.0054 (8) |
C7 | 0.0645 (14) | 0.0506 (11) | 0.0829 (16) | −0.0150 (11) | −0.0162 (13) | −0.0018 (12) |
C8 | 0.0310 (8) | 0.0375 (8) | 0.0396 (8) | 0.0071 (7) | −0.0012 (7) | −0.0025 (7) |
C9 | 0.0536 (12) | 0.0484 (10) | 0.0594 (12) | 0.0001 (9) | −0.0215 (10) | 0.0064 (9) |
C10 | 0.0389 (10) | 0.0398 (9) | 0.0594 (11) | −0.0008 (8) | −0.0164 (9) | 0.0033 (8) |
C11 | 0.0301 (11) | 0.0377 (12) | 0.0348 (11) | 0.000 | −0.0039 (9) | 0.000 |
C12 | 0.0476 (14) | 0.0482 (14) | 0.0366 (12) | 0.000 | −0.0019 (11) | 0.000 |
C13 | 0.0399 (14) | 0.0658 (18) | 0.0422 (14) | 0.000 | 0.0010 (11) | 0.000 |
O1—C2 | 1.334 (2) | C7—H7C | 0.9600 |
O1—H1 | 0.857 (10) | C8—C9 | 1.500 (2) |
O2—C4 | 1.366 (2) | C9—H9A | 0.9600 |
O2—C7 | 1.429 (3) | C9—H9B | 0.9600 |
N1—C8 | 1.286 (2) | C9—H9C | 0.9600 |
N1—C10 | 1.455 (2) | C10—C11 | 1.535 (2) |
C1—C6 | 1.405 (2) | C10—H10A | 0.9700 |
C1—C2 | 1.417 (2) | C10—H10B | 0.9700 |
C1—C8 | 1.466 (2) | C11—C12 | 1.528 (3) |
C2—C3 | 1.399 (2) | C11—C13 | 1.531 (3) |
C3—C4 | 1.380 (3) | C11—C10i | 1.535 (2) |
C3—H3 | 0.9300 | C12—H12A | 0.9600 |
C4—C5 | 1.394 (3) | C12—H12B | 0.9600 |
C5—C6 | 1.369 (3) | C12—H12C | 0.9600 |
C5—H5 | 0.9300 | C13—H13A | 0.9600 |
C6—H6 | 0.9300 | C13—H13B | 0.9600 |
C7—H7A | 0.9600 | C13—H13C | 0.9600 |
C7—H7B | 0.9600 | ||
C2—O1—H1 | 103 (3) | C8—C9—H9A | 109.5 |
C4—O2—C7 | 117.70 (16) | C8—C9—H9B | 109.5 |
C8—N1—C10 | 123.15 (15) | H9A—C9—H9B | 109.5 |
C6—C1—C2 | 116.94 (16) | C8—C9—H9C | 109.5 |
C6—C1—C8 | 122.15 (16) | H9A—C9—H9C | 109.5 |
C2—C1—C8 | 120.81 (15) | H9B—C9—H9C | 109.5 |
O1—C2—C3 | 117.90 (15) | N1—C10—C11 | 111.42 (14) |
O1—C2—C1 | 121.50 (16) | N1—C10—H10A | 109.3 |
C3—C2—C1 | 120.60 (16) | C11—C10—H10A | 109.3 |
C4—C3—C2 | 120.01 (17) | N1—C10—H10B | 109.3 |
C4—C3—H3 | 120.0 | C11—C10—H10B | 109.3 |
C2—C3—H3 | 120.0 | H10A—C10—H10B | 108.0 |
O2—C4—C3 | 124.15 (17) | C12—C11—C13 | 109.7 (2) |
O2—C4—C5 | 115.47 (16) | C12—C11—C10 | 110.34 (14) |
C3—C4—C5 | 120.38 (17) | C13—C11—C10 | 110.17 (14) |
C6—C5—C4 | 119.53 (17) | C12—C11—C10i | 110.34 (14) |
C6—C5—H5 | 120.2 | C13—C11—C10i | 110.17 (14) |
C4—C5—H5 | 120.2 | C10—C11—C10i | 106.04 (19) |
C5—C6—C1 | 122.50 (17) | C11—C12—H12A | 109.5 |
C5—C6—H6 | 118.8 | C11—C12—H12B | 109.5 |
C1—C6—H6 | 118.8 | H12A—C12—H12B | 109.5 |
O2—C7—H7A | 109.5 | C11—C12—H12C | 109.5 |
O2—C7—H7B | 109.5 | H12A—C12—H12C | 109.5 |
H7A—C7—H7B | 109.5 | H12B—C12—H12C | 109.5 |
O2—C7—H7C | 109.5 | C11—C13—H13A | 109.5 |
H7A—C7—H7C | 109.5 | C11—C13—H13B | 109.5 |
H7B—C7—H7C | 109.5 | H13A—C13—H13B | 109.5 |
N1—C8—C1 | 117.46 (15) | C11—C13—H13C | 109.5 |
N1—C8—C9 | 122.87 (16) | H13A—C13—H13C | 109.5 |
C1—C8—C9 | 119.67 (15) | H13B—C13—H13C | 109.5 |
C6—C1—C2—O1 | 177.56 (17) | C2—C1—C6—C5 | 0.5 (3) |
C8—C1—C2—O1 | 1.1 (3) | C8—C1—C6—C5 | 176.91 (17) |
C6—C1—C2—C3 | −2.0 (2) | C10—N1—C8—C1 | 176.40 (16) |
C8—C1—C2—C3 | −178.41 (16) | C10—N1—C8—C9 | −3.9 (3) |
O1—C2—C3—C4 | −177.35 (17) | C6—C1—C8—N1 | −172.62 (17) |
C1—C2—C3—C4 | 2.2 (3) | C2—C1—C8—N1 | 3.6 (2) |
C7—O2—C4—C3 | −3.4 (3) | C6—C1—C8—C9 | 7.7 (3) |
C7—O2—C4—C5 | 176.26 (19) | C2—C1—C8—C9 | −176.04 (16) |
C2—C3—C4—O2 | 178.73 (17) | C8—N1—C10—C11 | −144.49 (18) |
C2—C3—C4—C5 | −0.9 (3) | N1—C10—C11—C12 | −66.5 (2) |
O2—C4—C5—C6 | 179.79 (17) | N1—C10—C11—C13 | 54.8 (2) |
C3—C4—C5—C6 | −0.5 (3) | N1—C10—C11—C10i | 173.97 (11) |
C4—C5—C6—C1 | 0.7 (3) |
Symmetry code: (i) x, −y+3/2, z. |
Cg1 is the centroid of the C1–C6 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N1 | 0.86 (1) | 1.70 (2) | 2.507 (2) | 157 (4) |
C7—H7c···Cg1ii | 0.96 | 2.75 | 3.547 (2) | 141 |
C9—H9b···Cg1iii | 0.96 | 2.66 | 3.456 (2) | 140 |
Symmetry codes: (ii) x−3/2, y, −z−1/2; (iii) x−1/2, y, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C23H30N2O4 |
Mr | 398.49 |
Crystal system, space group | Orthorhombic, Pnma |
Temperature (K) | 294 |
a, b, c (Å) | 10.0764 (7), 36.069 (2), 5.8322 (4) |
V (Å3) | 2119.7 (2) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.30 × 0.25 × 0.20 |
Data collection | |
Diffractometer | Agilent SuperNova Dual diffractometer with Atlas detector |
Absorption correction | Multi-scan (CrysAlis PRO; Agilent, 2010) |
Tmin, Tmax | 0.793, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 6816, 2419, 1952 |
Rint | 0.039 |
(sin θ/λ)max (Å−1) | 0.651 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.055, 0.155, 1.08 |
No. of reflections | 2419 |
No. of parameters | 141 |
No. of restraints | 1 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.23, −0.18 |
Computer programs: CrysAlis PRO (Agilent, 2010), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006), publCIF (Westrip, 2010).
Cg1 is the centroid of the C1–C6 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N1 | 0.857 (10) | 1.695 (17) | 2.507 (2) | 157 (4) |
C7—H7c···Cg1i | 0.96 | 2.75 | 3.547 (2) | 141 |
C9—H9b···Cg1ii | 0.96 | 2.66 | 3.456 (2) | 140 |
Symmetry codes: (i) x−3/2, y, −z−1/2; (ii) x−1/2, y, −z+1/2. |
Footnotes
‡Additional correspondence author, e-mail: akbarghaemi@yahoo.com.
Acknowledgements
We gratefully acknowledge practical support of this study by K. N. Toosi University of Technology, Islamic Azad University (Saveh Branch), and thank the University of Malaya for support of the crystallographic facility.
References
Agilent (2010). CrysAlis PRO. Agilent Technologies, Yarnton, England. Google Scholar
Brandenburg, K. (2006). DIAMOND. Crystal Impact GbR, Bonn, Germany. Google Scholar
Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565. CrossRef IUCr Journals Google Scholar
Rayati, S., Sadeghzadeh, N. & Khavasi, H. R. (2007). Inorg. Chem. Commun. 10, 1545–1548. Web of Science CrossRef CAS Google Scholar
Rayati, S., Zakavi, S., Koliaei, M., Wojtczak, A. & Kozakiewicz, A. (2010). Inorg. Chem. Commun. 13, 203–207. Web of Science CSD CrossRef CAS Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Westrip, S. P. (2010). J. Appl. Cryst. 43, 920–925. Web of Science CrossRef CAS IUCr Journals 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.
The crystallographic investigation of the title compound, (I), was motivated by recent research in Schiff base complexes (Rayati et al., 2007; Rayati et al., 2010). The molecule of (I), Fig. 1, has crystallographically imposed mirror symmetry. The dihedral angle formed between the two benzene rings is 55.26 (5) ° indicating that, overall, the molecule has a curved shape. The presence of an intramolecular O—H···N hydrogen bond is noted, Table 1. The methoxy group is co-planar with the benzene ring to which it is attached as seen in the value of the C7—O2—C4—C3 torsion angle of -3.4 (3) °.
Molecules are assembled into layers in the ac plane through the agency of C—H···π interactions, Table 1 and Fig. 2, formed by methyl-H and the (C1—C6) benzene ring, indicating that the latter is bridging. Layers stack along the b axis, Fig. 3.