organic compounds
(E)-4-[2-(4-Ethoxyphenyl)ethenyl]-1-methylpyridinium naphthalene-2-sulfonate
aCentre for Crystal Growth, School of Advanced Sciences, VIT University, Vellore 632 014, India, bCrystal Growth and Crystallography Division, School of Advanced Sciences, VIT University, Vellore 632 014, India, cSophisticated Test and Instrumentation Centre (STIC), Cochin University PO, Cochin 682 022, Kerala, India, and dDepartment of Physics, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh
*Correspondence e-mail: jpodder59@gmail.com
In the title salt, C16H18NO+·C10H7O3S−, the substituents attached to the central C=C bond adopt a trans conformation and the benzene and pyridinium rings are nearly coplanar, making a dihedral angle of 6.01 (9)°. The features weak C—H⋯O hydrogen bonds and C—H⋯π interactions .
Related literature
The title compound was synthesized as part of a search for materials with non-linear optical properties, see: Okada et al. (1990); Yang et al. (2007). For the synthesis of the pyridinium precursor, see: Okada et al. (1990). For related compounds, see: Ruiz et al. (2006); Murugavel et al. (2009).
Experimental
Crystal data
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Data collection: APEX2 (Bruker, 2004); cell APEX2 and SAINT (Bruker, 2004); data reduction: SAINT and XPREP (Bruker, 2004); program(s) used to solve structure: SIR92 (Altomare et al., 1993); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and Mercury (Macrae et al., 2006)'; software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S1600536813009240/bh2474sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536813009240/bh2474Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536813009240/bh2474Isup3.cml
4-[2-(4-Ethoxy-phenyl)-vinyl-pyridinium iodide was obtained by condensation reaction between 1,4-dimethyl pyridinium iodide, which was prepared from 4-methylpyridine and methyl iodide, and 4-ethoxybenzaldehyde (all were taken in an equimolar ratio) in the presence of piperidine added as a catalyst. The solution was refluxed for 5 h, yielding the expected pyridinium salt after filtration (Okada et al., 1990). Then the iodide salt was dissolved in water (20 ml) and aqueous sodium 2-naphthalenesulfonate was added. A yellow precipitate was formed, which was filtered off and dried in an oven at 413 K for 1 h (Ruiz et al., 2006). Single crystals suitable for X-ray diffraction were obtained by successive recrystallization (three times) from a methanol/water (8:2 v/v) mixture.
H atoms were placed in calculated positions and allowed to ride on their parent atoms, with C—H distances in the range 0.93–0.97 Å and with Uiso(H) = 1.2Ueq(parent C) for CH and CH2 groups, and Uiso(H) = 1.5Ueq(parent C) for methyl groups.
The title compound was synthesized in the search for materials with non-linear optical properties (Okada et al., 1990; Ruiz et al., 2006; Yang et al., 2007). In the title compound, C16H18NO+.C10H7O2S-, the pyridinium and benzene rings in the cation make a dihedral angle of 6.01 (9)°. This cation possess trans configuration, which can be confirmed from the torsion angle C6—C7—C8—C9, -177.8 (2)°. The C7═C8 group links the benzene and pyridinium rings, with a characteristic bond length of 1.329 (3) Å. These features are similar to those found in related compounds (Ruiz et al., 2006; Murugavel et al., 2009). All deviations from expected values for bond lengths are within ca. 0.05 Å. The ethoxy group has C1 and O1 atoms slightly deviated from the mean plane of the benzene ring, by 0.130 (2) and 0.015 (2) Å, respectively. The anion and cation are placed almost perpendicular each to other, the mean planes making an angle of 81.72 (6) Å.
Regarding the crystal packing, weak C—H···O hydrogen bonds and C—H···π interactions are stabilizing the The inter and intramolecular C—H···O interactions are formed mainly in cation-anion and anion-anion pairs. The pyridinium ring is significantly involved in the formation of C—H···O hydrogen bonds. Interestingly, there is a dimeric hydrogen bond between two symmetry-related anions (C25—H25···O3), and other hydrogen bonds exist between anions and cations (see Table 1). In addition, one C—H···π interaction is observed between the cation and the anion: C14—H14···Cgi (Cg is the centroid of ring C20/C21/C22/C24/C25/C26; symmetry code i: -1/2+x,1/2-y,1/2+z; see Table 1).
The title compound was synthesized as part of a search for materials with non-linear optical properties, see: Okada et al. (1990); Yang et al. (2007). For the synthesis of the pyridinium precursor, see: Okada et al. (1990). For related compounds, see: Ruiz et al. (2006); Murugavel et al. (2009).
Data collection: APEX2 (Bruker, 2004); cell
APEX2 and SAINT (Bruker, 2004); data reduction: SAINT and XPREP (Bruker, 2004); program(s) used to solve structure: SIR92 (Altomare et al., 1993); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and Mercury (Macrae et al., 2006)'; software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).Fig. 1. The molecular structure of the title compound, with 50% probability displacement ellipsoids. | |
Fig. 2. The crystal packing of the title salt, showing weak C—H···O, π···π aromatic and C—H···π interactions. |
C16H18NO+·C10H7O3S− | F(000) = 944 |
Mr = 447.53 | Dx = 1.329 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 2935 reflections |
a = 10.896 (1) Å | θ = 4.7–55.0° |
b = 17.2838 (16) Å | µ = 0.18 mm−1 |
c = 11.8888 (10) Å | T = 296 K |
β = 92.752 (4)° | Block, yellow |
V = 2236.4 (3) Å3 | 0.40 × 0.35 × 0.30 mm |
Z = 4 |
Bruker APEXII CCD diffractometer | 5354 independent reflections |
Radiation source: fine-focus sealed tube | 3678 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.020 |
ω and φ scan | θmax = 28.3°, θmin = 2.5° |
Absorption correction: multi-scan (SADABS; Bruker, 1999) | h = −14→14 |
Tmin = 0.932, Tmax = 0.949 | k = −22→11 |
9220 measured reflections | l = −15→9 |
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)] = 0.052 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.159 | H-atom parameters constrained |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0795P)2 + 0.5684P] where P = (Fo2 + 2Fc2)/3 |
5354 reflections | (Δ/σ)max = 0.004 |
291 parameters | Δρmax = 0.52 e Å−3 |
0 restraints | Δρmin = −0.32 e Å−3 |
0 constraints |
C16H18NO+·C10H7O3S− | V = 2236.4 (3) Å3 |
Mr = 447.53 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 10.896 (1) Å | µ = 0.18 mm−1 |
b = 17.2838 (16) Å | T = 296 K |
c = 11.8888 (10) Å | 0.40 × 0.35 × 0.30 mm |
β = 92.752 (4)° |
Bruker APEXII CCD diffractometer | 5354 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 1999) | 3678 reflections with I > 2σ(I) |
Tmin = 0.932, Tmax = 0.949 | Rint = 0.020 |
9220 measured reflections |
R[F2 > 2σ(F2)] = 0.052 | 0 restraints |
wR(F2) = 0.159 | H-atom parameters constrained |
S = 1.03 | Δρmax = 0.52 e Å−3 |
5354 reflections | Δρmin = −0.32 e Å−3 |
291 parameters |
x | y | z | Uiso*/Ueq | ||
S1 | −0.13928 (4) | 0.46834 (3) | 0.22800 (4) | 0.03758 (16) | |
O1 | −0.22890 (17) | 0.26974 (11) | 0.70188 (18) | 0.0674 (5) | |
O2 | −0.17437 (15) | 0.39399 (10) | 0.27088 (15) | 0.0621 (5) | |
O3 | −0.15214 (14) | 0.47353 (9) | 0.10620 (13) | 0.0496 (4) | |
O4 | −0.19562 (15) | 0.53257 (11) | 0.28333 (15) | 0.0614 (5) | |
N1 | 0.67371 (16) | 0.21961 (12) | 0.39556 (15) | 0.0439 (4) | |
C1 | −0.4210 (2) | 0.24499 (16) | 0.7732 (2) | 0.0598 (7) | |
H1A | −0.4018 | 0.2784 | 0.8361 | 0.090* | |
H1B | −0.4758 | 0.2049 | 0.7956 | 0.090* | |
H1C | −0.4596 | 0.2744 | 0.7129 | 0.090* | |
C2 | −0.3040 (2) | 0.20899 (16) | 0.7340 (2) | 0.0569 (6) | |
H2A | −0.2636 | 0.1794 | 0.7943 | 0.068* | |
H2B | −0.3221 | 0.1747 | 0.6708 | 0.068* | |
C3 | −0.1151 (2) | 0.25166 (14) | 0.66518 (19) | 0.0464 (5) | |
C4 | −0.0432 (2) | 0.31443 (15) | 0.6413 (2) | 0.0565 (6) | |
H4 | −0.0741 | 0.3641 | 0.6501 | 0.068* | |
C5 | 0.0732 (2) | 0.30478 (14) | 0.6047 (2) | 0.0502 (6) | |
H5 | 0.1200 | 0.3480 | 0.5885 | 0.060* | |
C6 | 0.12266 (19) | 0.23083 (13) | 0.59137 (17) | 0.0382 (5) | |
C7 | 0.24500 (19) | 0.21686 (13) | 0.55280 (17) | 0.0396 (5) | |
H7 | 0.2698 | 0.1654 | 0.5500 | 0.048* | |
C8 | 0.3257 (2) | 0.26921 (13) | 0.52101 (18) | 0.0431 (5) | |
H8 | 0.3042 | 0.3211 | 0.5255 | 0.052* | |
C9 | 0.44579 (19) | 0.25042 (12) | 0.47955 (17) | 0.0389 (5) | |
C10 | 0.4916 (2) | 0.17538 (13) | 0.47388 (19) | 0.0457 (5) | |
H10 | 0.4452 | 0.1343 | 0.4992 | 0.055* | |
C11 | 0.6037 (2) | 0.16135 (14) | 0.4317 (2) | 0.0487 (5) | |
H11 | 0.6322 | 0.1107 | 0.4279 | 0.058* | |
C12 | 0.7940 (2) | 0.20278 (17) | 0.3504 (2) | 0.0599 (7) | |
H12A | 0.8180 | 0.2449 | 0.3036 | 0.090* | |
H12B | 0.7888 | 0.1562 | 0.3066 | 0.090* | |
H12C | 0.8540 | 0.1963 | 0.4115 | 0.090* | |
C13 | 0.0494 (2) | 0.16808 (14) | 0.6163 (2) | 0.0469 (5) | |
H13 | 0.0801 | 0.1183 | 0.6082 | 0.056* | |
C14 | −0.0689 (2) | 0.17784 (14) | 0.6530 (2) | 0.0504 (6) | |
H14 | −0.1166 | 0.1350 | 0.6692 | 0.060* | |
C15 | 0.6331 (2) | 0.29222 (15) | 0.4003 (2) | 0.0551 (6) | |
H15 | 0.6818 | 0.3323 | 0.3752 | 0.066* | |
C16 | 0.5214 (2) | 0.30866 (15) | 0.4413 (2) | 0.0559 (6) | |
H16 | 0.4953 | 0.3598 | 0.4438 | 0.067* | |
C17 | 0.02063 (18) | 0.47725 (11) | 0.26229 (16) | 0.0335 (4) | |
C18 | 0.0604 (2) | 0.46691 (12) | 0.37619 (17) | 0.0403 (5) | |
H18 | 0.0045 | 0.4519 | 0.4287 | 0.048* | |
C19 | 0.1800 (2) | 0.47885 (13) | 0.40938 (18) | 0.0457 (5) | |
H19 | 0.2046 | 0.4733 | 0.4849 | 0.055* | |
C20 | 0.26751 (19) | 0.49955 (13) | 0.33080 (19) | 0.0417 (5) | |
C21 | 0.3931 (2) | 0.51132 (15) | 0.3618 (2) | 0.0567 (7) | |
H21 | 0.4194 | 0.5074 | 0.4372 | 0.068* | |
C22 | 0.4766 (2) | 0.52831 (16) | 0.2831 (3) | 0.0651 (8) | |
H22 | 0.5590 | 0.5348 | 0.3049 | 0.078* | |
C23 | 0.10290 (18) | 0.49640 (11) | 0.18361 (16) | 0.0341 (4) | |
H23 | 0.0761 | 0.5022 | 0.1086 | 0.041* | |
C24 | 0.22918 (18) | 0.50750 (12) | 0.21552 (17) | 0.0367 (4) | |
C25 | 0.3178 (2) | 0.52578 (13) | 0.1359 (2) | 0.0476 (5) | |
H25 | 0.2938 | 0.5309 | 0.0601 | 0.057* | |
C26 | 0.4380 (2) | 0.53582 (16) | 0.1703 (3) | 0.0620 (7) | |
H26 | 0.4952 | 0.5479 | 0.1174 | 0.074* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0314 (3) | 0.0373 (3) | 0.0442 (3) | −0.0046 (2) | 0.00312 (19) | −0.0015 (2) |
O1 | 0.0487 (10) | 0.0612 (12) | 0.0944 (14) | 0.0025 (9) | 0.0244 (9) | 0.0087 (10) |
O2 | 0.0515 (10) | 0.0550 (11) | 0.0799 (12) | −0.0178 (8) | 0.0034 (9) | 0.0173 (9) |
O3 | 0.0410 (8) | 0.0584 (10) | 0.0486 (9) | −0.0081 (7) | −0.0055 (6) | 0.0012 (8) |
O4 | 0.0419 (9) | 0.0679 (12) | 0.0748 (11) | 0.0089 (8) | 0.0046 (8) | −0.0213 (9) |
N1 | 0.0359 (9) | 0.0542 (12) | 0.0424 (9) | −0.0050 (8) | 0.0097 (7) | 0.0004 (9) |
C1 | 0.0369 (13) | 0.0729 (19) | 0.0707 (17) | 0.0030 (12) | 0.0144 (11) | −0.0028 (14) |
C2 | 0.0491 (14) | 0.0530 (16) | 0.0687 (16) | −0.0018 (12) | 0.0035 (12) | −0.0022 (13) |
C3 | 0.0359 (11) | 0.0528 (14) | 0.0512 (13) | 0.0054 (10) | 0.0108 (9) | 0.0038 (11) |
C4 | 0.0502 (14) | 0.0406 (13) | 0.0805 (17) | 0.0066 (11) | 0.0215 (12) | 0.0006 (12) |
C5 | 0.0466 (13) | 0.0386 (13) | 0.0669 (15) | −0.0026 (10) | 0.0168 (11) | 0.0035 (11) |
C6 | 0.0348 (10) | 0.0409 (12) | 0.0393 (10) | 0.0007 (9) | 0.0057 (8) | 0.0026 (9) |
C7 | 0.0403 (11) | 0.0370 (11) | 0.0419 (11) | 0.0008 (9) | 0.0057 (8) | 0.0021 (9) |
C8 | 0.0422 (12) | 0.0369 (12) | 0.0510 (12) | 0.0015 (9) | 0.0118 (9) | 0.0027 (10) |
C9 | 0.0380 (11) | 0.0397 (12) | 0.0395 (10) | −0.0029 (9) | 0.0069 (8) | 0.0030 (9) |
C10 | 0.0423 (12) | 0.0394 (12) | 0.0568 (13) | −0.0086 (10) | 0.0158 (10) | 0.0021 (10) |
C11 | 0.0465 (13) | 0.0411 (13) | 0.0597 (13) | −0.0033 (10) | 0.0146 (10) | −0.0030 (11) |
C12 | 0.0354 (12) | 0.082 (2) | 0.0635 (15) | −0.0020 (12) | 0.0175 (10) | 0.0022 (14) |
C13 | 0.0407 (12) | 0.0381 (12) | 0.0628 (14) | 0.0024 (10) | 0.0105 (10) | 0.0025 (11) |
C14 | 0.0423 (12) | 0.0450 (14) | 0.0648 (14) | −0.0072 (10) | 0.0114 (10) | 0.0062 (11) |
C15 | 0.0482 (14) | 0.0476 (14) | 0.0710 (16) | −0.0131 (11) | 0.0179 (11) | 0.0094 (12) |
C16 | 0.0498 (14) | 0.0390 (13) | 0.0807 (17) | −0.0032 (11) | 0.0209 (12) | 0.0096 (12) |
C17 | 0.0336 (10) | 0.0283 (10) | 0.0386 (10) | −0.0002 (8) | 0.0004 (8) | −0.0022 (8) |
C18 | 0.0456 (12) | 0.0398 (12) | 0.0358 (10) | 0.0006 (9) | 0.0050 (8) | 0.0006 (9) |
C19 | 0.0521 (13) | 0.0468 (13) | 0.0374 (10) | 0.0054 (10) | −0.0070 (9) | −0.0005 (10) |
C20 | 0.0391 (11) | 0.0334 (11) | 0.0517 (12) | 0.0025 (9) | −0.0084 (9) | −0.0011 (10) |
C21 | 0.0458 (13) | 0.0534 (15) | 0.0688 (15) | 0.0015 (11) | −0.0197 (12) | −0.0015 (12) |
C22 | 0.0343 (12) | 0.0618 (17) | 0.098 (2) | −0.0072 (12) | −0.0126 (13) | 0.0035 (15) |
C23 | 0.0341 (10) | 0.0322 (10) | 0.0359 (9) | −0.0023 (8) | 0.0008 (7) | 0.0015 (8) |
C24 | 0.0341 (10) | 0.0308 (10) | 0.0449 (11) | −0.0008 (8) | −0.0004 (8) | 0.0015 (9) |
C25 | 0.0386 (12) | 0.0463 (13) | 0.0581 (13) | −0.0033 (10) | 0.0036 (10) | 0.0060 (11) |
C26 | 0.0391 (13) | 0.0583 (17) | 0.089 (2) | −0.0074 (11) | 0.0099 (12) | 0.0050 (14) |
S1—O2 | 1.4408 (17) | C10—H10 | 0.9300 |
S1—O4 | 1.4425 (17) | C11—H11 | 0.9300 |
S1—O3 | 1.4510 (16) | C12—H12A | 0.9600 |
S1—C17 | 1.777 (2) | C12—H12B | 0.9600 |
O1—C3 | 1.371 (3) | C12—H12C | 0.9600 |
O1—C2 | 1.396 (3) | C13—C14 | 1.390 (3) |
N1—C15 | 1.333 (3) | C13—H13 | 0.9300 |
N1—C11 | 1.346 (3) | C14—H14 | 0.9300 |
N1—C12 | 1.470 (3) | C15—C16 | 1.362 (3) |
C1—C2 | 1.512 (3) | C15—H15 | 0.9300 |
C1—H1A | 0.9600 | C16—H16 | 0.9300 |
C1—H1B | 0.9600 | C17—C23 | 1.367 (3) |
C1—H1C | 0.9600 | C17—C18 | 1.413 (3) |
C2—H2A | 0.9700 | C18—C19 | 1.359 (3) |
C2—H2B | 0.9700 | C18—H18 | 0.9300 |
C3—C4 | 1.375 (3) | C19—C20 | 1.412 (3) |
C3—C14 | 1.382 (3) | C19—H19 | 0.9300 |
C4—C5 | 1.371 (3) | C20—C21 | 1.415 (3) |
C4—H4 | 0.9300 | C20—C24 | 1.420 (3) |
C5—C6 | 1.399 (3) | C21—C22 | 1.368 (4) |
C5—H5 | 0.9300 | C21—H21 | 0.9300 |
C6—C13 | 1.387 (3) | C22—C26 | 1.392 (4) |
C6—C7 | 1.451 (3) | C22—H22 | 0.9300 |
C7—C8 | 1.329 (3) | C23—C24 | 1.423 (3) |
C7—H7 | 0.9300 | C23—H23 | 0.9300 |
C8—C9 | 1.457 (3) | C24—C25 | 1.420 (3) |
C8—H8 | 0.9300 | C25—C26 | 1.365 (3) |
C9—C16 | 1.391 (3) | C25—H25 | 0.9300 |
C9—C10 | 1.393 (3) | C26—H26 | 0.9300 |
C10—C11 | 1.364 (3) | ||
O2—S1—O4 | 113.52 (11) | N1—C12—H12A | 109.5 |
O2—S1—O3 | 113.19 (10) | N1—C12—H12B | 109.5 |
O4—S1—O3 | 112.62 (11) | H12A—C12—H12B | 109.5 |
O2—S1—C17 | 105.67 (10) | N1—C12—H12C | 109.5 |
O4—S1—C17 | 105.23 (10) | H12A—C12—H12C | 109.5 |
O3—S1—C17 | 105.68 (9) | H12B—C12—H12C | 109.5 |
C3—O1—C2 | 117.9 (2) | C6—C13—C14 | 121.6 (2) |
C15—N1—C11 | 119.78 (19) | C6—C13—H13 | 119.2 |
C15—N1—C12 | 120.4 (2) | C14—C13—H13 | 119.2 |
C11—N1—C12 | 119.9 (2) | C3—C14—C13 | 119.5 (2) |
C2—C1—H1A | 109.5 | C3—C14—H14 | 120.2 |
C2—C1—H1B | 109.5 | C13—C14—H14 | 120.2 |
H1A—C1—H1B | 109.5 | N1—C15—C16 | 121.0 (2) |
C2—C1—H1C | 109.5 | N1—C15—H15 | 119.5 |
H1A—C1—H1C | 109.5 | C16—C15—H15 | 119.5 |
H1B—C1—H1C | 109.5 | C15—C16—C9 | 121.3 (2) |
O1—C2—C1 | 106.8 (2) | C15—C16—H16 | 119.4 |
O1—C2—H2A | 110.4 | C9—C16—H16 | 119.4 |
C1—C2—H2A | 110.4 | C23—C17—C18 | 120.35 (18) |
O1—C2—H2B | 110.4 | C23—C17—S1 | 122.14 (15) |
C1—C2—H2B | 110.4 | C18—C17—S1 | 117.46 (15) |
H2A—C2—H2B | 108.6 | C19—C18—C17 | 120.31 (19) |
O1—C3—C4 | 114.7 (2) | C19—C18—H18 | 119.8 |
O1—C3—C14 | 125.7 (2) | C17—C18—H18 | 119.8 |
C4—C3—C14 | 119.5 (2) | C18—C19—C20 | 120.97 (19) |
C5—C4—C3 | 120.9 (2) | C18—C19—H19 | 119.5 |
C5—C4—H4 | 119.5 | C20—C19—H19 | 119.5 |
C3—C4—H4 | 119.5 | C19—C20—C21 | 122.6 (2) |
C4—C5—C6 | 121.0 (2) | C19—C20—C24 | 119.10 (18) |
C4—C5—H5 | 119.5 | C21—C20—C24 | 118.3 (2) |
C6—C5—H5 | 119.5 | C22—C21—C20 | 121.3 (2) |
C13—C6—C5 | 117.5 (2) | C22—C21—H21 | 119.4 |
C13—C6—C7 | 119.0 (2) | C20—C21—H21 | 119.4 |
C5—C6—C7 | 123.6 (2) | C21—C22—C26 | 120.0 (2) |
C8—C7—C6 | 127.4 (2) | C21—C22—H22 | 120.0 |
C8—C7—H7 | 116.3 | C26—C22—H22 | 120.0 |
C6—C7—H7 | 116.3 | C17—C23—C24 | 120.52 (17) |
C7—C8—C9 | 124.2 (2) | C17—C23—H23 | 119.7 |
C7—C8—H8 | 117.9 | C24—C23—H23 | 119.7 |
C9—C8—H8 | 117.9 | C25—C24—C20 | 119.16 (19) |
C16—C9—C10 | 116.0 (2) | C25—C24—C23 | 122.15 (18) |
C16—C9—C8 | 120.3 (2) | C20—C24—C23 | 118.69 (18) |
C10—C9—C8 | 123.65 (19) | C26—C25—C24 | 120.2 (2) |
C11—C10—C9 | 120.9 (2) | C26—C25—H25 | 119.9 |
C11—C10—H10 | 119.6 | C24—C25—H25 | 119.9 |
C9—C10—H10 | 119.6 | C25—C26—C22 | 121.2 (2) |
N1—C11—C10 | 121.0 (2) | C25—C26—H26 | 119.4 |
N1—C11—H11 | 119.5 | C22—C26—H26 | 119.4 |
C10—C11—H11 | 119.5 |
Cg1 is the centroid of the C20–C24 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C23—H23···O3 | 0.93 | 2.54 | 2.912 (2) | 105 |
C10—H10···O3i | 0.93 | 2.52 | 3.433 (3) | 168 |
C11—H11···O3ii | 0.93 | 2.42 | 3.323 (3) | 165 |
C12—H12B···O4ii | 0.96 | 2.58 | 3.488 (3) | 159 |
C15—H15···O2iii | 0.93 | 2.31 | 3.189 (3) | 158 |
C25—H25···O3iv | 0.93 | 2.45 | 3.323 (3) | 156 |
C14—H14···Cg1v | 0.93 | 2.84 | 3.686 (3) | 152 |
Symmetry codes: (i) x+1/2, −y+1/2, z+1/2; (ii) −x+1/2, y−1/2, −z+1/2; (iii) x+1, y, z; (iv) −x, −y+1, −z; (v) x−1/2, −y+1/2, z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C16H18NO+·C10H7O3S− |
Mr | 447.53 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 296 |
a, b, c (Å) | 10.896 (1), 17.2838 (16), 11.8888 (10) |
β (°) | 92.752 (4) |
V (Å3) | 2236.4 (3) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.18 |
Crystal size (mm) | 0.40 × 0.35 × 0.30 |
Data collection | |
Diffractometer | Bruker APEXII CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 1999) |
Tmin, Tmax | 0.932, 0.949 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 9220, 5354, 3678 |
Rint | 0.020 |
(sin θ/λ)max (Å−1) | 0.666 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.052, 0.159, 1.03 |
No. of reflections | 5354 |
No. of parameters | 291 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.52, −0.32 |
Computer programs: APEX2 (Bruker, 2004), APEX2 and SAINT (Bruker, 2004), SAINT and XPREP (Bruker, 2004), SIR92 (Altomare et al., 1993), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 2012) and Mercury (Macrae et al., 2006)'.
Cg1 is the centroid of the C20–C24 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C10—H10···O3i | 0.93 | 2.52 | 3.433 (3) | 167.64 |
C11—H11···O3ii | 0.93 | 2.42 | 3.323 (3) | 164.53 |
C12—H12B···O4ii | 0.96 | 2.58 | 3.488 (3) | 159.00 |
C15—H15···O2iii | 0.93 | 2.31 | 3.189 (3) | 158.36 |
C25—H25···O3iv | 0.93 | 2.45 | 3.323 (3) | 156.26 |
C14—H14···Cg1v | 0.93 | 2.84 | 3.686 (3) | 152.39 |
Symmetry codes: (i) x+1/2, −y+1/2, z+1/2; (ii) −x+1/2, y−1/2, −z+1/2; (iii) x+1, y, z; (iv) −x, −y+1, −z; (v) x−1/2, −y+1/2, z+1/2. |
Acknowledgements
The authors acknowledge STIC, Cochin-682022, for single-crystal XRD facility. The authors also thank VIT University for providing the research facilities.
References
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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 title compound was synthesized in the search for materials with non-linear optical properties (Okada et al., 1990; Ruiz et al., 2006; Yang et al., 2007). In the title compound, C16H18NO+.C10H7O2S-, the pyridinium and benzene rings in the cation make a dihedral angle of 6.01 (9)°. This cation possess trans configuration, which can be confirmed from the torsion angle C6—C7—C8—C9, -177.8 (2)°. The C7═C8 group links the benzene and pyridinium rings, with a characteristic bond length of 1.329 (3) Å. These features are similar to those found in related compounds (Ruiz et al., 2006; Murugavel et al., 2009). All deviations from expected values for bond lengths are within ca. 0.05 Å. The ethoxy group has C1 and O1 atoms slightly deviated from the mean plane of the benzene ring, by 0.130 (2) and 0.015 (2) Å, respectively. The anion and cation are placed almost perpendicular each to other, the mean planes making an angle of 81.72 (6) Å.
Regarding the crystal packing, weak C—H···O hydrogen bonds and C—H···π interactions are stabilizing the crystal structure. The inter and intramolecular C—H···O interactions are formed mainly in cation-anion and anion-anion pairs. The pyridinium ring is significantly involved in the formation of C—H···O hydrogen bonds. Interestingly, there is a dimeric hydrogen bond between two symmetry-related anions (C25—H25···O3), and other hydrogen bonds exist between anions and cations (see Table 1). In addition, one C—H···π interaction is observed between the cation and the anion: C14—H14···Cgi (Cg is the centroid of ring C20/C21/C22/C24/C25/C26; symmetry code i: -1/2+x,1/2-y,1/2+z; see Table 1).