organic compounds
2-[N-(4-{4-[(E)-(2-Hydroxybenzylidene)amino]phenoxy}phenyl)carboximidoyl]phenol
aDepartment of Chemistry, Faculty of Science, Islamic Azad University, Tabriz Branch, Tabriz, PO Box 1655, Iran, and bDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
*Correspondence e-mail: Edward.Tiekink@gmail.com
The molecular structure of the title Schiff base compound, C26H20N2O3, shows that respective methylidene residues are almost coplanar with the adjacent terminal benzene ring owing to the presence of intramolecular O—H⋯N hydrogen bonds [the N—C—C—C torsion angles are −6.6 (7) and −6.7 (7)°]. However, twists are exhibited about each methylidene and respective benzene ring connected to the central O atom; the dihedral angles formed between the two inner and two outer benzene rings are 54.6 (2) and 45.6 (3)°, respectively. The conformation about each of the C=N bonds [1.285 (5) and 1.295 (5) Å] is E. In the crystal, extensive C—H⋯π contacts involving all benzene rings results in the formation of layers in the ac plane.
Related literature
For related structures of Schiff base ligands, see: Chu & Huang (2007); Xu et al. (2008); Prasath et al. (2010). For details of crystallization from a U-tube under non-ambient conditions, see: Harrowfield et al. (1996).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2007); cell SAINT (Bruker, 2007); data reduction: SAINT; 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
10.1107/S1600536811007847/hg5006sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811007847/hg5006Isup2.hkl
A solution of 4,4'-diaminodiphenyl ether (10 mmol) in ethanol (50 ml) was added drop wise to a solution of salicylaldehyde (20 mmol) in ethanol (50 ml). The mixture was stirred for 6 h. The resulting solution was filtered to obtain a Schiff base which was dried. Crystals of the title compound were obtained by using the branched tube method (Harrowfield et al., 1996) where the Schiff base (5 mmol) was placed in the arm to be heated. Methanol was carefully added to fill both arms, and then the arm to be heated was placed in a bath at 333 K. After 2 days, yellow crystals were deposited in the cooler arm, which were filtered, washed with water and air dried.
The O– and C-bound H atoms were geometrically placed (O—H = 0.82 Å and C–H = 0.93 Å) and refined as riding with Uiso(H) = yUeq(parent atom) for y = 1.5 (O) and 1.2 (C).
Data collection: APEX2 (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); 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).Fig. 1. The molecular structure of (I) showing the atom-labelling scheme and displacement ellipsoids at the 35% probability level. | |
Fig. 2. View approximately in projection down the a axis of the unit-cell contents for (I). The C—H···π contacts are shown as purple dashed lines. |
C26H20N2O3 | F(000) = 856 |
Mr = 408.44 | Dx = 1.341 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 806 reflections |
a = 6.0234 (9) Å | θ = 2.6–20.9° |
b = 46.225 (7) Å | µ = 0.09 mm−1 |
c = 9.4371 (11) Å | T = 293 K |
β = 129.636 (7)° | Prism, yellow |
V = 2023.5 (5) Å3 | 0.35 × 0.24 × 0.08 mm |
Z = 4 |
Bruker APEXII CCD diffractometer | 3567 independent reflections |
Radiation source: fine-focus sealed tube | 1468 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.089 |
ϕ and ω scans | θmax = 25.0°, θmin = 1.8° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −7→7 |
Tmin = 0.856, Tmax = 1.000 | k = −54→31 |
10647 measured reflections | l = −11→11 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.069 | H-atom parameters constrained |
wR(F2) = 0.242 | w = 1/[σ2(Fo2) + (0.0859P)2] where P = (Fo2 + 2Fc2)/3 |
S = 1.05 | (Δ/σ)max < 0.001 |
3567 reflections | Δρmax = 0.33 e Å−3 |
283 parameters | Δρmin = −0.31 e Å−3 |
0 restraints | Extinction correction: SHELXL, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.012 (2) |
C26H20N2O3 | V = 2023.5 (5) Å3 |
Mr = 408.44 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 6.0234 (9) Å | µ = 0.09 mm−1 |
b = 46.225 (7) Å | T = 293 K |
c = 9.4371 (11) Å | 0.35 × 0.24 × 0.08 mm |
β = 129.636 (7)° |
Bruker APEXII CCD diffractometer | 3567 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 1468 reflections with I > 2σ(I) |
Tmin = 0.856, Tmax = 1.000 | Rint = 0.089 |
10647 measured reflections |
R[F2 > 2σ(F2)] = 0.069 | 0 restraints |
wR(F2) = 0.242 | H-atom parameters constrained |
S = 1.05 | Δρmax = 0.33 e Å−3 |
3567 reflections | Δρmin = −0.31 e Å−3 |
283 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 > 2σ(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 | 0.9581 (7) | 0.39134 (8) | 0.7320 (5) | 0.0577 (11) | |
H1o | 0.8694 | 0.3762 | 0.7075 | 0.087* | |
O2 | 0.1380 (6) | 0.24995 (7) | 0.6475 (4) | 0.0383 (9) | |
O3 | 0.7882 (8) | 0.10965 (8) | 0.5591 (5) | 0.0560 (11) | |
H3o | 0.7480 | 0.1245 | 0.5856 | 0.084* | |
N1 | 0.5304 (8) | 0.35847 (8) | 0.6345 (5) | 0.0365 (10) | |
N2 | 0.5548 (8) | 0.14148 (9) | 0.6585 (5) | 0.0384 (10) | |
C1 | 0.7827 (10) | 0.41395 (11) | 0.6882 (6) | 0.0405 (13) | |
C2 | 0.4989 (10) | 0.40991 (10) | 0.6172 (6) | 0.0339 (11) | |
C3 | 0.3264 (11) | 0.43421 (11) | 0.5699 (6) | 0.0428 (13) | |
H3 | 0.1367 | 0.4318 | 0.5221 | 0.051* | |
C4 | 0.4323 (12) | 0.46186 (11) | 0.5928 (7) | 0.0525 (15) | |
H4 | 0.3142 | 0.4779 | 0.5581 | 0.063* | |
C5 | 0.7160 (13) | 0.46527 (12) | 0.6678 (7) | 0.0545 (15) | |
H5 | 0.7903 | 0.4838 | 0.6866 | 0.065* | |
C6 | 0.8909 (12) | 0.44174 (12) | 0.7155 (7) | 0.0509 (15) | |
H6 | 1.0818 | 0.4444 | 0.7661 | 0.061* | |
C7 | 0.3857 (10) | 0.38160 (10) | 0.6009 (6) | 0.0372 (12) | |
H7 | 0.2021 | 0.3800 | 0.5649 | 0.045* | |
C8 | 0.4255 (9) | 0.33115 (10) | 0.6359 (6) | 0.0315 (11) | |
C9 | 0.4603 (9) | 0.30768 (10) | 0.5600 (6) | 0.0339 (11) | |
H9 | 0.5465 | 0.3104 | 0.5071 | 0.041* | |
C10 | 0.3696 (10) | 0.28052 (10) | 0.5618 (6) | 0.0366 (12) | |
H10 | 0.3878 | 0.2651 | 0.5067 | 0.044* | |
C11 | 0.2507 (9) | 0.27635 (9) | 0.6465 (6) | 0.0322 (12) | |
C12 | 0.2179 (9) | 0.29916 (10) | 0.7254 (6) | 0.0338 (12) | |
H12 | 0.1379 | 0.2962 | 0.7820 | 0.041* | |
C13 | 0.3047 (9) | 0.32640 (10) | 0.7197 (6) | 0.0349 (12) | |
H13 | 0.2823 | 0.3419 | 0.7726 | 0.042* | |
C14 | 0.2517 (10) | 0.22375 (10) | 0.6487 (6) | 0.0313 (12) | |
C15 | 0.5385 (10) | 0.21951 (10) | 0.7314 (6) | 0.0377 (13) | |
H15 | 0.6668 | 0.2350 | 0.7849 | 0.045* | |
C16 | 0.6329 (10) | 0.19221 (10) | 0.7340 (6) | 0.0352 (12) | |
H16 | 0.8251 | 0.1895 | 0.7878 | 0.042* | |
C17 | 0.4477 (9) | 0.16882 (10) | 0.6583 (6) | 0.0339 (12) | |
C18 | 0.1595 (9) | 0.17341 (10) | 0.5739 (6) | 0.0357 (12) | |
H18 | 0.0316 | 0.1579 | 0.5211 | 0.043* | |
C19 | 0.0608 (9) | 0.20082 (10) | 0.5677 (6) | 0.0349 (12) | |
H19 | −0.1331 | 0.2038 | 0.5092 | 0.042* | |
C20 | 0.4768 (10) | 0.11806 (10) | 0.6915 (6) | 0.0389 (13) | |
H20 | 0.3650 | 0.1194 | 0.7276 | 0.047* | |
C21 | 0.5609 (9) | 0.08991 (10) | 0.6732 (6) | 0.0348 (12) | |
C22 | 0.7033 (10) | 0.08644 (11) | 0.6017 (6) | 0.0386 (12) | |
C23 | 0.7609 (11) | 0.05915 (12) | 0.5731 (7) | 0.0485 (14) | |
H23 | 0.8522 | 0.0570 | 0.5231 | 0.058* | |
C24 | 0.6833 (11) | 0.03516 (12) | 0.6185 (7) | 0.0555 (16) | |
H24 | 0.7213 | 0.0168 | 0.5983 | 0.067* | |
C25 | 0.5489 (12) | 0.03808 (12) | 0.6941 (7) | 0.0549 (15) | |
H25 | 0.5031 | 0.0218 | 0.7284 | 0.066* | |
C26 | 0.4831 (11) | 0.06532 (11) | 0.7186 (6) | 0.0443 (13) | |
H26 | 0.3868 | 0.0673 | 0.7652 | 0.053* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.046 (2) | 0.053 (3) | 0.078 (3) | 0.0038 (19) | 0.041 (2) | −0.001 (2) |
O2 | 0.0476 (19) | 0.0225 (19) | 0.051 (2) | 0.0009 (16) | 0.0340 (18) | 0.0014 (14) |
O3 | 0.072 (3) | 0.046 (3) | 0.075 (3) | −0.003 (2) | 0.059 (2) | −0.002 (2) |
N1 | 0.043 (2) | 0.031 (2) | 0.036 (2) | −0.003 (2) | 0.026 (2) | −0.0042 (18) |
N2 | 0.036 (2) | 0.034 (3) | 0.038 (2) | −0.0007 (19) | 0.020 (2) | −0.0003 (18) |
C1 | 0.046 (3) | 0.038 (3) | 0.040 (3) | −0.002 (3) | 0.029 (3) | −0.003 (2) |
C2 | 0.036 (3) | 0.029 (3) | 0.036 (3) | −0.002 (2) | 0.023 (2) | −0.001 (2) |
C3 | 0.047 (3) | 0.034 (3) | 0.046 (3) | 0.000 (3) | 0.029 (3) | −0.001 (2) |
C4 | 0.070 (4) | 0.030 (3) | 0.053 (4) | 0.003 (3) | 0.037 (3) | −0.002 (3) |
C5 | 0.071 (4) | 0.039 (4) | 0.053 (4) | −0.021 (3) | 0.039 (3) | −0.007 (3) |
C6 | 0.054 (3) | 0.051 (4) | 0.053 (4) | −0.008 (3) | 0.036 (3) | −0.001 (3) |
C7 | 0.035 (3) | 0.035 (3) | 0.042 (3) | 0.002 (2) | 0.025 (2) | −0.002 (2) |
C8 | 0.032 (3) | 0.028 (3) | 0.031 (3) | 0.001 (2) | 0.019 (2) | 0.000 (2) |
C9 | 0.040 (3) | 0.033 (3) | 0.036 (3) | 0.000 (2) | 0.027 (2) | −0.002 (2) |
C10 | 0.048 (3) | 0.029 (3) | 0.039 (3) | 0.006 (2) | 0.031 (3) | 0.000 (2) |
C11 | 0.036 (3) | 0.028 (3) | 0.028 (3) | 0.002 (2) | 0.019 (2) | 0.001 (2) |
C12 | 0.037 (3) | 0.034 (3) | 0.034 (3) | 0.003 (2) | 0.025 (2) | −0.002 (2) |
C13 | 0.044 (3) | 0.028 (3) | 0.036 (3) | 0.002 (2) | 0.027 (3) | −0.006 (2) |
C14 | 0.038 (3) | 0.027 (3) | 0.032 (3) | 0.002 (2) | 0.024 (3) | 0.001 (2) |
C15 | 0.040 (3) | 0.032 (3) | 0.033 (3) | −0.005 (2) | 0.019 (3) | −0.001 (2) |
C16 | 0.032 (3) | 0.029 (3) | 0.037 (3) | −0.002 (2) | 0.019 (2) | −0.002 (2) |
C17 | 0.036 (3) | 0.037 (3) | 0.030 (3) | 0.001 (2) | 0.022 (2) | −0.001 (2) |
C18 | 0.039 (3) | 0.026 (3) | 0.039 (3) | −0.006 (2) | 0.023 (2) | −0.005 (2) |
C19 | 0.032 (3) | 0.036 (3) | 0.034 (3) | −0.003 (2) | 0.020 (2) | 0.000 (2) |
C20 | 0.044 (3) | 0.036 (3) | 0.039 (3) | −0.003 (3) | 0.028 (3) | −0.001 (2) |
C21 | 0.033 (3) | 0.031 (3) | 0.037 (3) | −0.001 (2) | 0.020 (2) | −0.001 (2) |
C22 | 0.039 (3) | 0.032 (3) | 0.041 (3) | 0.002 (2) | 0.024 (3) | 0.000 (2) |
C23 | 0.045 (3) | 0.046 (4) | 0.052 (4) | 0.006 (3) | 0.030 (3) | −0.003 (3) |
C24 | 0.049 (3) | 0.037 (4) | 0.059 (4) | 0.006 (3) | 0.025 (3) | −0.005 (3) |
C25 | 0.061 (4) | 0.032 (3) | 0.056 (4) | −0.002 (3) | 0.030 (3) | 0.008 (3) |
C26 | 0.052 (3) | 0.033 (3) | 0.048 (3) | −0.003 (3) | 0.032 (3) | 0.005 (2) |
O1—C1 | 1.350 (5) | C10—H10 | 0.9300 |
O1—H1o | 0.8200 | C11—C12 | 1.376 (6) |
O2—C14 | 1.388 (5) | C12—C13 | 1.378 (6) |
O2—C11 | 1.399 (5) | C12—H12 | 0.9300 |
O3—C22 | 1.356 (5) | C13—H13 | 0.9300 |
O3—H3o | 0.8200 | C14—C19 | 1.381 (6) |
N1—C7 | 1.285 (5) | C14—C15 | 1.382 (6) |
N1—C8 | 1.416 (6) | C15—C16 | 1.378 (6) |
N2—C20 | 1.295 (5) | C15—H15 | 0.9300 |
N2—C17 | 1.418 (6) | C16—C17 | 1.381 (6) |
C1—C6 | 1.388 (7) | C16—H16 | 0.9300 |
C1—C2 | 1.395 (6) | C17—C18 | 1.389 (6) |
C2—C3 | 1.396 (6) | C18—C19 | 1.385 (6) |
C2—C7 | 1.438 (6) | C18—H18 | 0.9300 |
C3—C4 | 1.383 (6) | C19—H19 | 0.9300 |
C3—H3 | 0.9300 | C20—C21 | 1.447 (6) |
C4—C5 | 1.379 (7) | C20—H20 | 0.9300 |
C4—H4 | 0.9300 | C21—C26 | 1.397 (6) |
C5—C6 | 1.375 (7) | C21—C22 | 1.398 (7) |
C5—H5 | 0.9300 | C22—C23 | 1.380 (6) |
C6—H6 | 0.9300 | C23—C24 | 1.374 (7) |
C7—H7 | 0.9300 | C23—H23 | 0.9300 |
C8—C9 | 1.387 (6) | C24—C25 | 1.386 (8) |
C8—C13 | 1.392 (6) | C24—H24 | 0.9300 |
C9—C10 | 1.374 (6) | C25—C26 | 1.383 (7) |
C9—H9 | 0.9300 | C25—H25 | 0.9300 |
C10—C11 | 1.385 (6) | C26—H26 | 0.9300 |
C1—O1—H1o | 109.5 | C12—C13—H13 | 119.5 |
C14—O2—C11 | 121.5 (4) | C8—C13—H13 | 119.5 |
C22—O3—H3o | 109.5 | C19—C14—C15 | 120.2 (4) |
C7—N1—C8 | 120.5 (4) | C19—C14—O2 | 115.6 (4) |
C20—N2—C17 | 120.7 (4) | C15—C14—O2 | 124.1 (4) |
O1—C1—C6 | 118.5 (5) | C16—C15—C14 | 119.5 (5) |
O1—C1—C2 | 121.6 (4) | C16—C15—H15 | 120.2 |
C6—C1—C2 | 120.0 (5) | C14—C15—H15 | 120.2 |
C1—C2—C3 | 118.7 (5) | C15—C16—C17 | 121.3 (4) |
C1—C2—C7 | 121.7 (4) | C15—C16—H16 | 119.3 |
C3—C2—C7 | 119.5 (4) | C17—C16—H16 | 119.3 |
C4—C3—C2 | 121.3 (5) | C16—C17—C18 | 118.6 (5) |
C4—C3—H3 | 119.4 | C16—C17—N2 | 118.7 (4) |
C2—C3—H3 | 119.4 | C18—C17—N2 | 122.5 (4) |
C5—C4—C3 | 118.9 (5) | C19—C18—C17 | 120.6 (4) |
C5—C4—H4 | 120.6 | C19—C18—H18 | 119.7 |
C3—C4—H4 | 120.6 | C17—C18—H18 | 119.7 |
C6—C5—C4 | 121.1 (5) | C14—C19—C18 | 119.7 (4) |
C6—C5—H5 | 119.4 | C14—C19—H19 | 120.2 |
C4—C5—H5 | 119.4 | C18—C19—H19 | 120.2 |
C5—C6—C1 | 120.0 (5) | N2—C20—C21 | 121.0 (5) |
C5—C6—H6 | 120.0 | N2—C20—H20 | 119.5 |
C1—C6—H6 | 120.0 | C21—C20—H20 | 119.5 |
N1—C7—C2 | 122.0 (4) | C26—C21—C22 | 118.9 (5) |
N1—C7—H7 | 119.0 | C26—C21—C20 | 118.9 (5) |
C2—C7—H7 | 119.0 | C22—C21—C20 | 122.0 (4) |
C9—C8—C13 | 118.4 (4) | O3—C22—C23 | 118.4 (5) |
C9—C8—N1 | 118.5 (4) | O3—C22—C21 | 121.1 (4) |
C13—C8—N1 | 122.9 (4) | C23—C22—C21 | 120.5 (5) |
C10—C9—C8 | 121.1 (4) | C24—C23—C22 | 119.9 (5) |
C10—C9—H9 | 119.5 | C24—C23—H23 | 120.0 |
C8—C9—H9 | 119.5 | C22—C23—H23 | 120.0 |
C9—C10—C11 | 119.4 (4) | C23—C24—C25 | 120.6 (5) |
C9—C10—H10 | 120.3 | C23—C24—H24 | 119.7 |
C11—C10—H10 | 120.3 | C25—C24—H24 | 119.7 |
C12—C11—C10 | 120.7 (4) | C26—C25—C24 | 119.9 (5) |
C12—C11—O2 | 115.3 (4) | C26—C25—H25 | 120.1 |
C10—C11—O2 | 123.8 (4) | C24—C25—H25 | 120.1 |
C11—C12—C13 | 119.4 (4) | C25—C26—C21 | 120.1 (5) |
C11—C12—H12 | 120.3 | C25—C26—H26 | 119.9 |
C13—C12—H12 | 120.3 | C21—C26—H26 | 119.9 |
C12—C13—C8 | 121.0 (4) | ||
O1—C1—C2—C3 | −178.2 (4) | C11—O2—C14—C19 | −151.5 (4) |
C6—C1—C2—C3 | 1.9 (7) | C11—O2—C14—C15 | 31.5 (6) |
O1—C1—C2—C7 | 5.1 (7) | C19—C14—C15—C16 | −0.7 (7) |
C6—C1—C2—C7 | −174.8 (5) | O2—C14—C15—C16 | 176.3 (4) |
C1—C2—C3—C4 | −0.2 (7) | C14—C15—C16—C17 | −1.1 (7) |
C7—C2—C3—C4 | 176.6 (4) | C15—C16—C17—C18 | 1.8 (7) |
C2—C3—C4—C5 | −1.5 (8) | C15—C16—C17—N2 | 177.5 (4) |
C3—C4—C5—C6 | 1.6 (8) | C20—N2—C17—C16 | 140.5 (4) |
C4—C5—C6—C1 | 0.1 (8) | C20—N2—C17—C18 | −44.0 (6) |
O1—C1—C6—C5 | 178.3 (5) | C16—C17—C18—C19 | −0.7 (7) |
C2—C1—C6—C5 | −1.8 (7) | N2—C17—C18—C19 | −176.2 (4) |
C8—N1—C7—C2 | 173.4 (4) | C15—C14—C19—C18 | 1.7 (7) |
C1—C2—C7—N1 | −6.6 (7) | O2—C14—C19—C18 | −175.5 (4) |
C3—C2—C7—N1 | 176.7 (4) | C17—C18—C19—C14 | −1.0 (7) |
C7—N1—C8—C9 | 140.4 (4) | C17—N2—C20—C21 | 173.5 (4) |
C7—N1—C8—C13 | −43.6 (6) | N2—C20—C21—C26 | 177.0 (4) |
C13—C8—C9—C10 | 2.1 (6) | N2—C20—C21—C22 | −6.7 (7) |
N1—C8—C9—C10 | 178.3 (4) | C26—C21—C22—O3 | −178.7 (4) |
C8—C9—C10—C11 | −2.3 (7) | C20—C21—C22—O3 | 5.0 (7) |
C9—C10—C11—C12 | 1.2 (7) | C26—C21—C22—C23 | 1.3 (7) |
C9—C10—C11—O2 | 176.5 (4) | C20—C21—C22—C23 | −175.1 (4) |
C14—O2—C11—C12 | −152.1 (4) | O3—C22—C23—C24 | 178.6 (4) |
C14—O2—C11—C10 | 32.4 (6) | C21—C22—C23—C24 | −1.3 (8) |
C10—C11—C12—C13 | 0.0 (7) | C22—C23—C24—C25 | −0.4 (8) |
O2—C11—C12—C13 | −175.7 (4) | C23—C24—C25—C26 | 2.2 (8) |
C11—C12—C13—C8 | −0.2 (7) | C24—C25—C26—C21 | −2.3 (8) |
C9—C8—C13—C12 | −0.9 (6) | C22—C21—C26—C25 | 0.6 (7) |
N1—C8—C13—C12 | −176.9 (4) | C20—C21—C26—C25 | 177.0 (4) |
Cg1–Cg4 are the centroids of the C1—C6, C8–C13, C14–C19 and C21–C26 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1o···N1 | 0.82 | 1.88 | 2.602 (5) | 147 |
O3—H3o···N2 | 0.82 | 1.86 | 2.589 (5) | 147 |
C23—H23···Cg1i | 0.93 | 2.90 | 3.556 (6) | 129 |
C26—H26···Cg1ii | 0.93 | 2.90 | 3.566 (6) | 129 |
C16—H16···Cg2iii | 0.93 | 2.76 | 3.469 (6) | 133 |
C19—H19···Cg2iv | 0.93 | 2.86 | 3.582 (5) | 135 |
C9—H9···Cg3i | 0.93 | 2.76 | 3.462 (5) | 133 |
C12—H12···Cg3ii | 0.93 | 2.88 | 3.584 (5) | 134 |
C3—H3···Cg4iv | 0.93 | 2.87 | 3.512 (6) | 128 |
C6—H6···Cg4iii | 0.93 | 2.95 | 3.626 (7) | 131 |
Symmetry codes: (i) x, −y−3/2, z−5/2; (ii) x, −y−3/2, z−3/2; (iii) x+1, −y−3/2, z−3/2; (iv) x−1, −y−3/2, z−5/2. |
Experimental details
Crystal data | |
Chemical formula | C26H20N2O3 |
Mr | 408.44 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 293 |
a, b, c (Å) | 6.0234 (9), 46.225 (7), 9.4371 (11) |
β (°) | 129.636 (7) |
V (Å3) | 2023.5 (5) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.35 × 0.24 × 0.08 |
Data collection | |
Diffractometer | Bruker APEXII CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.856, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 10647, 3567, 1468 |
Rint | 0.089 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.069, 0.242, 1.05 |
No. of reflections | 3567 |
No. of parameters | 283 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.33, −0.31 |
Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006), publCIF (Westrip, 2010).
Cg1–Cg4 are the centroids of the C1—C6, C8–C13, C14–C19 and C21–C26 rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1o···N1 | 0.82 | 1.88 | 2.602 (5) | 147 |
O3—H3o···N2 | 0.82 | 1.86 | 2.589 (5) | 147 |
C23—H23···Cg1i | 0.93 | 2.90 | 3.556 (6) | 129 |
C26—H26···Cg1ii | 0.93 | 2.90 | 3.566 (6) | 129 |
C16—H16···Cg2iii | 0.93 | 2.76 | 3.469 (6) | 133 |
C19—H19···Cg2iv | 0.93 | 2.86 | 3.582 (5) | 135 |
C9—H9···Cg3i | 0.93 | 2.76 | 3.462 (5) | 133 |
C12—H12···Cg3ii | 0.93 | 2.88 | 3.584 (5) | 134 |
C3—H3···Cg4iv | 0.93 | 2.87 | 3.512 (6) | 128 |
C6—H6···Cg4iii | 0.93 | 2.95 | 3.626 (7) | 131 |
Symmetry codes: (i) x, −y−3/2, z−5/2; (ii) x, −y−3/2, z−3/2; (iii) x+1, −y−3/2, z−3/2; (iv) x−1, −y−3/2, z−5/2. |
Footnotes
‡Additional correspondence author, e-mail: Shahverdizadeh@iaut.ac.ir.
Acknowledgements
Tabriz Azad University is gratefully acknowledged for the support of this work.
References
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In continuation of structural studies of Schiff base ligands (Prasath et al., 2010), attention is now directed to evaluating the structures of flexible derivatives (Chu & Huang, 2007; Xu et al., 2008) which have been shown, for example, to lead to helical coordination polymers (Chu & Huang, 2007). In this context the title compound (I) was prepared and characterized crystallographically.
The molecule of (I) is twisted at both the central O atom, and about each of the methylidene residues. Thus, the dihedral angle formed between the least-squares planes through the benzene rings directly connected to the central O atom is 54.6 (2) °. Similarly, the dihedral angles formed between the terminal benzene ring and the adjacent benzene ring are 51.6 (2) ° for each of C1–C6/C8–C13 and C14–C19/C21–C26. Finally, the dihedral angle formed between the terminal benzene rings is 45.6 (3) °. The conformation about each of the C═N bonds [N1═C7 is 1.285 (5) Å and N2═C20 is 1.295 (5) Å] is E. The presence of intramolecular O—H···N hydrogen bonds, Table 1, ensures co-planarity between the respective terminal benzene rings and methylidene residues as reflected in the C1—C2—C7—N1 and N2—C20—C21—C22 torsion angles of -6.6 (7) and -6.7 (7) °. respectively.
The crystal packing is dominated by C—H···π interactions, Table 1, whereby each of the four benzene rings accepts two such contacts. The result is the formation of layers in the ac plane, Fig. 2.