organic compounds
(E)-1-(2,5-Dimethyl-3-thienyl)-3-(2-hydroxyphenyl)prop-2-en-1-one
aThe Center of Excellence for Advanced Materials Research, King Abdul Aziz University, Jeddah 21589, PO Box 80203, Saudi Arabia, bDepartment of Chemistry, Faculty of Science, King Abdul Aziz University, Jeddah 21589, PO Box 80203, Saudi Arabia, and cDepartment of Physics, University of Sargodha, Sargodha, Pakistan
*Correspondence e-mail: dmntahir_uos@yahoo.com
In the title compound, C15H14O2S, the dihedral angle between the aromatic rings is 8.46 –(8)°. The central enone group is planar (r.m.s. deviation = 0.0267 Å) and is oriented at a dihedral angle of 1.20 (9)° with respect to the benzene ring and at 8.27 (9)° with respect to the thiophene group. In the crystal, the molecules are linked into polymeric chains extending along the b axis due to intermolecular O—H⋯O hydrogen bonding. An S(6) ring motif is formed due to a short intramolecular C—H⋯O contact. C—H⋯π interactions involving a methyl group of the 2,5-dimethylthienyl group and the benzene ring are present. π–π interactions between the centroids of the benzene and heterocyclic rings [3.7691 (9) Å] also occur.
Related literature
For background to ); Domínguez et al. (2001); Hans et al. (2010); Kayser & Kiderlen (2001); Mojzis et al. (2008); Vogel et al. (2010). For related structures, see: Asiri et al. (2010a,b); For graph-set notation, see: Bernstein et al. (1995).
and their biological activity, see: Bandgar & Gawande (2010Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2009); cell SAINT (Bruker, 2009); 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 for Windows (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON.
Supporting information
https://doi.org/10.1107/S1600536810031284/bq2228sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810031284/bq2228Isup2.hkl
A solution of 3-acetyl-2,5-dimethylthiophene (0.38 g, 2.5 mmol) and salicylaldehyde (0.30 g, 2.5 mmol) in an ethanolic solution of NaOH (3.0 g in 10 ml of ethanol) was stirred for 16 h at room temperature. The solution was poured into ice-cold water of pH = 2 (pH adjusted by HCl). The solid was separated and dissolved in CH2Cl2, this solution was washed with a
of NaHCO3 and then evaporated to dryness. The residue was recrystallized from methanol/chloroform.Yellow solid: Yield: 78%; m.p. 418–419 K.The H-atoms were positioned geometrically (O—H = 0.86, C–H = 0.93–0.96 Å) and refined as riding with Uiso(H) = xUeq(C, O), where x = 1.5 for hydroxy & methyl and x = 1.2 for aryl H-atoms.
An enone system between two aromatic rings is generally known as a
It is an important class of natural products which serve as precursors for the preparation of various and exhibit interesting pharmacological activities (Mojzis et al., 2008). Natural and synthetic have shown broad spectrum of biological activities such as anti-inflammatory (Vogel et al., 2010), antituberculosis (Hans et al., 2010), antifungal (Bandgar & Gawande, 2010), antimalarial (Domínguez et al., 2001) and antileish-manicidal (Kayser & Kiderlen 2001). Due to wide application of chalcons in the present communication, we report the synthesis and of title compound I (Fig. 1).Recently we have reported the crystal structures of (II) i.e. (E)-1-(2,5-dimethyl-3-thienyl)-3-(2,4,5-trimethoxyphenyl)prop-2-en-1-one (Asiri et al., 2010a) and (III) i.e. (2E)-3-(3,4-dimethoxyphenyl)-1-(2,5-dimethylthiophen-3-yl)prop-2-en-1-one (Asiri et al., 2010b) which are related to the title compound and differ from (I) due to substitutions at the phenyl ring.
In (I), the group A (C1—C6/O1) of salicylaldehyde, the central group B (C7—C9/O2) and group C (C10—C15/S1) of 2,5-dimethylthiophen-3-yl moiety are planar with r. m. s. deviation of 0.0063, 0.0267 and 0.0100 Å, respectively. The dihedral angles between A/B, A/C and B/C are 1.20 (9), 8.46 (8) and 8.27 (9)°, respectively. In the title compound, an S(6) ring motif (Bernstein et al., 1995) is formed due to intramolecular H-bonding of C—H···O type (Table 1, Fig. 2). The title compound is stabilized in the form of polymeric chains extending along the b axis due to O—H···O type of intermolecular H-bonding (Table 1, Fig. 2). The C—H···π (Table 1) and π–π interactions between the centroids of phenyl and heterocyclic rings at a distance of 3.7691 (9) Å [symmetry code: 1 - x, 1 - y, - z] also play important role in stabilizing the molecules.
For background to
and their biological activity, see: Bandgar & Gawande (2010); Domínguez et al. (2001); Hans et al. (2010); Kayser & Kiderlen (2001); Mojzis et al. (2008); Vogel et al. (2010). For related structures, see: Asiri et al. (2010a,b); For graph-set notation, see: Bernstein et al. (1995).Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); 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) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON (Spek, 2009).C15H14O2S | Z = 2 |
Mr = 258.32 | F(000) = 272 |
Triclinic, P1 | Dx = 1.326 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 7.6095 (3) Å | Cell parameters from 2182 reflections |
b = 7.7900 (3) Å | θ = 2.5–25.3° |
c = 12.3109 (7) Å | µ = 0.24 mm−1 |
α = 98.527 (2)° | T = 296 K |
β = 91.943 (2)° | Prism, yellow |
γ = 115.551 (1)° | 0.30 × 0.24 × 0.22 mm |
V = 647.19 (5) Å3 |
Bruker Kappa APEXII CCD diffractometer | 3174 independent reflections |
Radiation source: fine-focus sealed tube | 2720 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.022 |
Detector resolution: 8.10 pixels mm-1 | θmax = 28.6°, θmin = 3.0° |
ω scans | h = −10→11 |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | k = −9→10 |
Tmin = 0.968, Tmax = 0.985 | l = −16→16 |
11156 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)] = 0.038 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.112 | H-atom parameters constrained |
S = 1.05 | w = 1/[σ2(Fo2) + (0.0593P)2 + 0.1362P] where P = (Fo2 + 2Fc2)/3 |
3174 reflections | (Δ/σ)max = 0.001 |
166 parameters | Δρmax = 0.30 e Å−3 |
0 restraints | Δρmin = −0.23 e Å−3 |
C15H14O2S | γ = 115.551 (1)° |
Mr = 258.32 | V = 647.19 (5) Å3 |
Triclinic, P1 | Z = 2 |
a = 7.6095 (3) Å | Mo Kα radiation |
b = 7.7900 (3) Å | µ = 0.24 mm−1 |
c = 12.3109 (7) Å | T = 296 K |
α = 98.527 (2)° | 0.30 × 0.24 × 0.22 mm |
β = 91.943 (2)° |
Bruker Kappa APEXII CCD diffractometer | 3174 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 2720 reflections with I > 2σ(I) |
Tmin = 0.968, Tmax = 0.985 | Rint = 0.022 |
11156 measured reflections |
R[F2 > 2σ(F2)] = 0.038 | 0 restraints |
wR(F2) = 0.112 | H-atom parameters constrained |
S = 1.05 | Δρmax = 0.30 e Å−3 |
3174 reflections | Δρmin = −0.23 e Å−3 |
166 parameters |
Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All su's are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles |
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 | ||
S1 | 0.67628 (6) | 1.06807 (5) | 0.38493 (3) | 0.0475 (1) | |
O1 | 0.75707 (17) | 0.38399 (14) | −0.02745 (8) | 0.0464 (3) | |
O2 | 0.73309 (16) | 1.04466 (13) | 0.01642 (8) | 0.0461 (3) | |
C1 | 0.79715 (18) | 0.57560 (16) | −0.16540 (10) | 0.0329 (3) | |
C2 | 0.78885 (19) | 0.40687 (17) | −0.13253 (10) | 0.0343 (3) | |
C3 | 0.8126 (2) | 0.26851 (19) | −0.20796 (12) | 0.0434 (4) | |
C4 | 0.8396 (3) | 0.2929 (2) | −0.31564 (12) | 0.0504 (5) | |
C5 | 0.8450 (3) | 0.4557 (2) | −0.35080 (12) | 0.0507 (5) | |
C6 | 0.8256 (2) | 0.5950 (2) | −0.27561 (11) | 0.0427 (4) | |
C7 | 0.77922 (19) | 0.73111 (17) | −0.09244 (10) | 0.0343 (3) | |
C8 | 0.7412 (2) | 0.74553 (17) | 0.01224 (11) | 0.0370 (3) | |
C9 | 0.72983 (18) | 0.92090 (16) | 0.06888 (10) | 0.0334 (3) | |
C10 | 0.71496 (18) | 0.94215 (17) | 0.18852 (10) | 0.0337 (3) | |
C11 | 0.7304 (2) | 0.81420 (19) | 0.25716 (11) | 0.0429 (4) | |
C12 | 0.7131 (2) | 0.8629 (2) | 0.36472 (12) | 0.0478 (4) | |
C13 | 0.7182 (3) | 0.7610 (3) | 0.45856 (15) | 0.0714 (7) | |
C14 | 0.68407 (19) | 1.08881 (17) | 0.24864 (10) | 0.0360 (4) | |
C15 | 0.6562 (3) | 1.2516 (2) | 0.21248 (12) | 0.0484 (5) | |
H1 | 0.75495 | 0.28106 | −0.01816 | 0.0696* | |
H3 | 0.81024 | 0.15882 | −0.18542 | 0.0520* | |
H4 | 0.85434 | 0.19895 | −0.36531 | 0.0605* | |
H5 | 0.86144 | 0.47102 | −0.42384 | 0.0609* | |
H6 | 0.83168 | 0.70550 | −0.29889 | 0.0513* | |
H7 | 0.79737 | 0.83780 | −0.12429 | 0.0411* | |
H8 | 0.72160 | 0.64484 | 0.04996 | 0.0445* | |
H11 | 0.75059 | 0.70703 | 0.22980 | 0.0515* | |
H13A | 0.73513 | 0.64780 | 0.43117 | 0.1070* | |
H13B | 0.59731 | 0.72392 | 0.49126 | 0.1070* | |
H13C | 0.82534 | 0.84640 | 0.51317 | 0.1070* | |
H15A | 0.77811 | 1.34346 | 0.19316 | 0.0725* | |
H15B | 0.61341 | 1.31403 | 0.27168 | 0.0725* | |
H15C | 0.55936 | 1.20163 | 0.14942 | 0.0725* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0656 (3) | 0.0486 (2) | 0.0318 (2) | 0.0290 (2) | 0.0077 (2) | 0.0051 (1) |
O1 | 0.0804 (7) | 0.0384 (5) | 0.0371 (5) | 0.0376 (5) | 0.0187 (5) | 0.0171 (4) |
O2 | 0.0761 (7) | 0.0373 (5) | 0.0389 (5) | 0.0353 (5) | 0.0124 (5) | 0.0139 (4) |
C1 | 0.0395 (6) | 0.0311 (5) | 0.0311 (6) | 0.0176 (5) | 0.0049 (5) | 0.0075 (4) |
C2 | 0.0425 (7) | 0.0312 (5) | 0.0321 (6) | 0.0183 (5) | 0.0060 (5) | 0.0075 (4) |
C3 | 0.0581 (8) | 0.0336 (6) | 0.0423 (7) | 0.0244 (6) | 0.0073 (6) | 0.0047 (5) |
C4 | 0.0663 (10) | 0.0471 (8) | 0.0384 (7) | 0.0292 (7) | 0.0063 (7) | −0.0037 (6) |
C5 | 0.0690 (10) | 0.0560 (8) | 0.0285 (6) | 0.0291 (7) | 0.0091 (6) | 0.0061 (6) |
C6 | 0.0581 (8) | 0.0422 (7) | 0.0332 (7) | 0.0250 (6) | 0.0081 (6) | 0.0126 (5) |
C7 | 0.0435 (7) | 0.0298 (5) | 0.0353 (6) | 0.0201 (5) | 0.0061 (5) | 0.0101 (4) |
C8 | 0.0528 (7) | 0.0299 (5) | 0.0358 (6) | 0.0238 (5) | 0.0077 (5) | 0.0094 (5) |
C9 | 0.0413 (6) | 0.0285 (5) | 0.0343 (6) | 0.0185 (5) | 0.0044 (5) | 0.0075 (4) |
C10 | 0.0399 (6) | 0.0301 (5) | 0.0335 (6) | 0.0174 (5) | 0.0046 (5) | 0.0065 (4) |
C11 | 0.0595 (8) | 0.0399 (6) | 0.0379 (7) | 0.0280 (6) | 0.0075 (6) | 0.0124 (5) |
C12 | 0.0636 (9) | 0.0472 (7) | 0.0384 (7) | 0.0276 (7) | 0.0067 (6) | 0.0145 (6) |
C13 | 0.1111 (16) | 0.0748 (12) | 0.0457 (9) | 0.0510 (11) | 0.0156 (10) | 0.0288 (8) |
C14 | 0.0428 (7) | 0.0336 (6) | 0.0329 (6) | 0.0186 (5) | 0.0030 (5) | 0.0044 (5) |
C15 | 0.0726 (10) | 0.0449 (7) | 0.0412 (7) | 0.0395 (7) | 0.0063 (7) | 0.0046 (6) |
S1—C12 | 1.7228 (16) | C11—C12 | 1.349 (2) |
S1—C14 | 1.7099 (13) | C12—C13 | 1.504 (2) |
O1—C2 | 1.3476 (16) | C14—C15 | 1.498 (2) |
O2—C9 | 1.2298 (15) | C3—H3 | 0.9300 |
O1—H1 | 0.8200 | C4—H4 | 0.9300 |
C1—C6 | 1.4011 (18) | C5—H5 | 0.9300 |
C1—C7 | 1.4564 (18) | C6—H6 | 0.9300 |
C1—C2 | 1.4083 (17) | C7—H7 | 0.9300 |
C2—C3 | 1.393 (2) | C8—H8 | 0.9300 |
C3—C4 | 1.377 (2) | C11—H11 | 0.9300 |
C4—C5 | 1.384 (2) | C13—H13A | 0.9600 |
C5—C6 | 1.381 (2) | C13—H13B | 0.9600 |
C7—C8 | 1.3295 (18) | C13—H13C | 0.9600 |
C8—C9 | 1.4777 (18) | C15—H15A | 0.9600 |
C9—C10 | 1.4713 (17) | C15—H15B | 0.9600 |
C10—C11 | 1.4372 (19) | C15—H15C | 0.9600 |
C10—C14 | 1.3788 (19) | ||
S1···C4i | 3.686 (2) | C8···H11 | 2.7400 |
S1···H4ii | 3.1500 | C9···H15C | 3.0600 |
O1···O2iii | 2.7067 (14) | C9···H1iv | 3.0800 |
O1···C8 | 2.8416 (17) | C11···H8 | 2.6800 |
O1···C15iii | 3.2790 (18) | C15···H1iv | 2.9800 |
O1···C9i | 3.3986 (19) | H1···O2iii | 1.8900 |
O2···O1iv | 2.7067 (14) | H1···C9iii | 3.0800 |
O2···C3iv | 3.4160 (17) | H1···C15iii | 2.9800 |
O2···C15 | 2.919 (2) | H1···H3 | 2.2700 |
O2···C7v | 3.3745 (19) | H1···H15Aiii | 2.5600 |
O1···H15Aiii | 2.7900 | H1···H15Ciii | 2.5800 |
O1···H15Ciii | 2.8800 | H3···O2iii | 2.7600 |
O1···H8 | 2.2400 | H3···H1 | 2.2700 |
O2···H1iv | 1.8900 | H4···S1vii | 3.1500 |
O2···H3iv | 2.7600 | H6···H7 | 2.3200 |
O2···H15A | 2.8300 | H7···O2 | 2.4000 |
O2···H15C | 2.6200 | H7···H6 | 2.3200 |
O2···H7 | 2.4000 | H7···H15Cvi | 2.6000 |
O2···H15Cvi | 2.7700 | H8···O1 | 2.2400 |
C2···C10i | 3.583 (2) | H8···C2 | 2.9000 |
C3···O2iii | 3.4160 (17) | H8···C11 | 2.6800 |
C3···C14i | 3.559 (2) | H8···H11 | 2.1800 |
C4···S1i | 3.686 (2) | H11···C8 | 2.7400 |
C6···C14v | 3.442 (2) | H11···H8 | 2.1800 |
C7···C9v | 3.5138 (19) | H11···H13A | 2.5900 |
C7···O2v | 3.3745 (19) | H13A···H11 | 2.5900 |
C8···O1 | 2.8416 (17) | H15A···O1iv | 2.7900 |
C9···O1i | 3.3986 (19) | H15A···O2 | 2.8300 |
C9···C7v | 3.5138 (19) | H15A···H1iv | 2.5600 |
C10···C2i | 3.583 (2) | H15A···C1v | 3.0600 |
C14···C3i | 3.559 (2) | H15A···C5v | 3.0500 |
C14···C6v | 3.442 (2) | H15A···C6v | 2.9600 |
C15···O2 | 2.919 (2) | H15C···O1iv | 2.8800 |
C15···O1iv | 3.2790 (18) | H15C···O2 | 2.6200 |
C1···H15Av | 3.0600 | H15C···C9 | 3.0600 |
C2···H8 | 2.9000 | H15C···H1iv | 2.5800 |
C5···H15Av | 3.0500 | H15C···O2vi | 2.7700 |
C6···H15Av | 2.9600 | H15C···C7vi | 2.9200 |
C7···H15Cvi | 2.9200 | H15C···H7vi | 2.6000 |
C12—S1—C14 | 93.47 (7) | C2—C3—H3 | 120.00 |
C2—O1—H1 | 109.00 | C4—C3—H3 | 120.00 |
C2—C1—C7 | 124.39 (11) | C3—C4—H4 | 120.00 |
C6—C1—C7 | 118.02 (11) | C5—C4—H4 | 120.00 |
C2—C1—C6 | 117.59 (12) | C4—C5—H5 | 121.00 |
O1—C2—C3 | 121.65 (12) | C6—C5—H5 | 121.00 |
C1—C2—C3 | 120.04 (12) | C1—C6—H6 | 119.00 |
O1—C2—C1 | 118.31 (12) | C5—C6—H6 | 119.00 |
C2—C3—C4 | 120.50 (13) | C1—C7—H7 | 115.00 |
C3—C4—C5 | 120.73 (15) | C8—C7—H7 | 115.00 |
C4—C5—C6 | 118.88 (14) | C7—C8—H8 | 120.00 |
C1—C6—C5 | 122.23 (13) | C9—C8—H8 | 120.00 |
C1—C7—C8 | 130.57 (12) | C10—C11—H11 | 123.00 |
C7—C8—C9 | 120.25 (11) | C12—C11—H11 | 123.00 |
O2—C9—C10 | 121.58 (12) | C12—C13—H13A | 109.00 |
C8—C9—C10 | 118.20 (11) | C12—C13—H13B | 109.00 |
O2—C9—C8 | 120.22 (11) | C12—C13—H13C | 109.00 |
C9—C10—C14 | 123.69 (11) | H13A—C13—H13B | 109.00 |
C11—C10—C14 | 111.61 (11) | H13A—C13—H13C | 110.00 |
C9—C10—C11 | 124.70 (12) | H13B—C13—H13C | 109.00 |
C10—C11—C12 | 114.24 (13) | C14—C15—H15A | 109.00 |
S1—C12—C13 | 121.37 (12) | C14—C15—H15B | 109.00 |
C11—C12—C13 | 128.61 (15) | C14—C15—H15C | 109.00 |
S1—C12—C11 | 110.00 (11) | H15A—C15—H15B | 109.00 |
S1—C14—C15 | 118.86 (10) | H15A—C15—H15C | 109.00 |
C10—C14—C15 | 130.46 (12) | H15B—C15—H15C | 110.00 |
S1—C14—C10 | 110.68 (10) | ||
C14—S1—C12—C11 | 0.02 (16) | C4—C5—C6—C1 | −1.2 (3) |
C14—S1—C12—C13 | −178.73 (15) | C1—C7—C8—C9 | −179.80 (15) |
C12—S1—C14—C10 | −0.21 (12) | C7—C8—C9—O2 | 8.3 (2) |
C12—S1—C14—C15 | 179.18 (14) | C7—C8—C9—C10 | −171.60 (14) |
C6—C1—C2—O1 | −178.51 (14) | O2—C9—C10—C11 | −173.33 (14) |
C6—C1—C2—C3 | 1.3 (2) | O2—C9—C10—C14 | 6.7 (2) |
C7—C1—C2—O1 | 1.8 (2) | C8—C9—C10—C11 | 6.6 (2) |
C7—C1—C2—C3 | −178.36 (14) | C8—C9—C10—C14 | −173.36 (14) |
C2—C1—C6—C5 | 0.1 (2) | C9—C10—C11—C12 | 179.67 (14) |
C7—C1—C6—C5 | 179.74 (16) | C14—C10—C11—C12 | −0.37 (19) |
C2—C1—C7—C8 | −4.6 (3) | C9—C10—C14—S1 | −179.69 (11) |
C6—C1—C7—C8 | 175.77 (16) | C9—C10—C14—C15 | 1.0 (3) |
O1—C2—C3—C4 | 178.23 (16) | C11—C10—C14—S1 | 0.36 (16) |
C1—C2—C3—C4 | −1.6 (2) | C11—C10—C14—C15 | −178.95 (16) |
C2—C3—C4—C5 | 0.4 (3) | C10—C11—C12—S1 | 0.21 (18) |
C3—C4—C5—C6 | 0.9 (3) | C10—C11—C12—C13 | 178.83 (17) |
Symmetry codes: (i) −x+1, −y+1, −z; (ii) x, y+1, z+1; (iii) x, y−1, z; (iv) x, y+1, z; (v) −x+2, −y+2, −z; (vi) −x+1, −y+2, −z; (vii) x, y−1, z−1. |
Cg2 is the centroid ofthe C1–C6 phenyl ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O2iii | 0.82 | 1.8900 | 2.7067 (14) | 174 |
C8—H8···O1 | 0.93 | 2.2400 | 2.8416 (17) | 122 |
C15—H15A···Cg2v | 0.96 | 2.79 | 3.652 (2) | 150 |
Symmetry codes: (iii) x, y−1, z; (v) −x+2, −y+2, −z. |
Experimental details
Crystal data | |
Chemical formula | C15H14O2S |
Mr | 258.32 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 296 |
a, b, c (Å) | 7.6095 (3), 7.7900 (3), 12.3109 (7) |
α, β, γ (°) | 98.527 (2), 91.943 (2), 115.551 (1) |
V (Å3) | 647.19 (5) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.24 |
Crystal size (mm) | 0.30 × 0.24 × 0.22 |
Data collection | |
Diffractometer | Bruker Kappa APEXII CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.968, 0.985 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 11156, 3174, 2720 |
Rint | 0.022 |
(sin θ/λ)max (Å−1) | 0.674 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.038, 0.112, 1.05 |
No. of reflections | 3174 |
No. of parameters | 166 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.30, −0.23 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2009), WinGX (Farrugia, 1999) and PLATON (Spek, 2009).
Cg2 is the centroid ofthe C1–C6 phenyl ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O2i | 0.82 | 1.8900 | 2.7067 (14) | 174 |
C8—H8···O1 | 0.93 | 2.2400 | 2.8416 (17) | 122 |
C15—H15A···Cg2ii | 0.96 | 2.79 | 3.652 (2) | 150 |
Symmetry codes: (i) x, y−1, z; (ii) −x+2, −y+2, −z. |
Acknowledgements
The authors would like to thank the Chemistry Department, King Abdul Aziz University, Jeddah, Saudi Arabia, for providing the research facilities and for the financial support of this work via grant No. (3–045/430).
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.
An enone system between two aromatic rings is generally known as a chalcones. It is an important class of natural products which serve as precursors for the preparation of various flavonoids and exhibit interesting pharmacological activities (Mojzis et al., 2008). Natural and synthetic chalcones have shown broad spectrum of biological activities such as anti-inflammatory (Vogel et al., 2010), antituberculosis (Hans et al., 2010), antifungal (Bandgar & Gawande, 2010), antimalarial (Domínguez et al., 2001) and antileish-manicidal (Kayser & Kiderlen 2001). Due to wide application of chalcons in the present communication, we report the synthesis and crystal structure of title compound I (Fig. 1).
Recently we have reported the crystal structures of (II) i.e. (E)-1-(2,5-dimethyl-3-thienyl)-3-(2,4,5-trimethoxyphenyl)prop-2-en-1-one (Asiri et al., 2010a) and (III) i.e. (2E)-3-(3,4-dimethoxyphenyl)-1-(2,5-dimethylthiophen-3-yl)prop-2-en-1-one (Asiri et al., 2010b) which are related to the title compound and differ from (I) due to substitutions at the phenyl ring.
In (I), the group A (C1—C6/O1) of salicylaldehyde, the central group B (C7—C9/O2) and group C (C10—C15/S1) of 2,5-dimethylthiophen-3-yl moiety are planar with r. m. s. deviation of 0.0063, 0.0267 and 0.0100 Å, respectively. The dihedral angles between A/B, A/C and B/C are 1.20 (9), 8.46 (8) and 8.27 (9)°, respectively. In the title compound, an S(6) ring motif (Bernstein et al., 1995) is formed due to intramolecular H-bonding of C—H···O type (Table 1, Fig. 2). The title compound is stabilized in the form of polymeric chains extending along the b axis due to O—H···O type of intermolecular H-bonding (Table 1, Fig. 2). The C—H···π (Table 1) and π–π interactions between the centroids of phenyl and heterocyclic rings at a distance of 3.7691 (9) Å [symmetry code: 1 - x, 1 - y, - z] also play important role in stabilizing the molecules.