organic compounds
1,5-Bis(thiophen-2-yl)-3-(2,4,5-trimethoxyphenyl)pentane-1,5-dione
aX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, and bCrystal Materials Research Unit, Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
*Correspondence e-mail: hkfun@usm.my
In the title 1,5-diketone compound, C22H22O5S2, the benzene ring makes dihedral angles of 41.51 (6) and 25.83 (6)° with the two thiophene rings, while the dihedral angle between the thiophene rings is 26.67 (7)°. An intramolecular C—H⋯O interaction generates an S(9) ring motif. In the crystal, molecules are linked into a three-dimensional network by weak C—H⋯O and C—H⋯π interactions, and a π–π interaction with a centroid–centroid distance of 3.6527 (8) Å.
Related literature
For bond-length data, see: Allen et al. (1987). For hydrogen-bond motifs, see: Bernstein et al. (1995). For background and applications of 1,5-diketone compounds, see: Alagarsamy et al. (2007); Favaro et al. (2002); Harrowven & Hannam (1999); Pillai et al. (2004); Rai et al. (2008). For the preparation of the title compound, see: Suwunwong et al. (2011). For the stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986).
Experimental
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: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009).
Supporting information
https://doi.org/10.1107/S160053681104846X/is5007sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S160053681104846X/is5007Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S160053681104846X/is5007Isup3.cml
The title compound (I) is a symmetrical 1,5-diketone compound which was alternatively synthesized by the stirring of (E)-1-(2-thitenyl)-3-(2,4,5-trimethoxyphenyl)prop-2-en-1-one (0.57 g, 1.5 mmol) (Suwunwong et al., 2011) in methanol (15 ml) with a freshly prepared sodium methoxide (1.5 mmol of sodium in 40 ml of methanol). Excess malononitrile (0.20 g, 3.0 mmol) was then added with continuous stirring at room temperature until the precipitate separated out. The resulting solid was filtered. Colorless single crystals of the title compound suitable for X-ray
was obtained by recrystalization from acetone/methanol (1:1 v/v) by the slow evaporation of the solvent at room temperature after several days.All H atoms were placed in calculated positions, with C—H = 0.95, 1.00 and 0.99 Å for aromatic, CH and CH2, respectively, and Uiso(H) = 1.2Ueq(C), and with C—H = 0.98 Å and Uiso(H) = 1.5Ueq(C) for CH3 atoms. A rotating group model was used for the methyl groups.
Ketones are obviously one of the most important compounds in organic chemistry. There are many interesting applications of the compounds with the ketone group and the heterocyclic unit, which exhibit not only bioactivity such as antibacterial (Rai et al., 2008), anti-inflammatory (Pillai et al., 2004) and analgesic (Alagarsamy et al., 2007) activities, but also fluorescent property (Favaro et al., 2002). The 1,5-diketone compound is conventionally prepared by the oxidative cleavage of cyclopentenes or the conjugate addition of α,β-unsaturated (Harrowven & Hannam, 1999).
toIn the molecule of the title compound (Fig. 1), the pentane-1,5-dione unit (C5–C9/O1/O2) is puckered with the torsion angles C5–C6–C7–C8 = 170.36 (10)° and C6–C7–C8–C9 = -71.81 (13)°, making the two ketone groups pointing towards opposite directions. A weak intramolecular C3—H3A···O2 interaction (Table 1) which generates an S(9) ring motif (Bernstein et al., 1995) helps to stabilize this conformation. The dihedral angle between the two thiophene rings is 26.67 (7)°. The 2,4,5-trimethoxyphenyl ring makes dihedral angles of 41.51 (6) and 25.83 (6)° with the S1/C1–C4 and S2/C10–C13 thiophene rings, respectively. The three substituted methoxy groups of 2,4,5-trimethoxyphenyl unit have two different orientations in which the ortho- and para-methoxy groups (at atom C15 and C17 positions) are co-planar with the phenyl ring with torsion angles C20–O3–C15–C16 = -0.50 (18)° and C21–O4–C17–C18 = 179.46 (12)° whereas the meta-methoxy (at atom C18) is twisted with the torsion angle C22–O5–C18–C19 = 10.08 (19)° The bond distances in (I) are in normal ranges (Allen et al., 1987).
In the crystal packing (Fig. 2), the molecules are linked into a three dimensional network through the enone unit by weak C—H···O interactions (Table 1), a weak C—H···π interaction (Table 1) and a π–π interaction with a Cg1···Cg1 distance of 3.6527 (8) Å; Cg1 is the centroid of S1/C1–C4 thiophene ring.
For bond-length data, see: Allen et al. (1987). For hydrogen-bond motifs, see: Bernstein et al. (1995). For background and applications of 1,5-diketone compounds, see: Alagarsamy et al. (2007); Favaro et al. (2002); Harrowven & Hannam (1999); Pillai et al. (2004); Rai et al. (2008). For the preparation of the title compound, see: Suwunwong et al. (2011). For the stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986).
Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).Fig. 1. The molecular structure of the title compound, showing 50% probability displacement ellipsoids and the atom-numbering scheme. The weak C—H···O interaction was shown as a dashed line. | |
Fig. 2. The crystal packing diagram of the title compound viewed along the b axis. Weak C—H···O interactions were shown as dashed lines. |
C22H22O5S2 | F(000) = 904 |
Mr = 430.54 | Dx = 1.392 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 6027 reflections |
a = 16.1955 (2) Å | θ = 2.4–30.1° |
b = 7.5777 (1) Å | µ = 0.29 mm−1 |
c = 16.7706 (2) Å | T = 100 K |
β = 93.490 (1)° | Block, colorless |
V = 2054.35 (4) Å3 | 0.26 × 0.20 × 0.18 mm |
Z = 4 |
Bruker APEXII CCD area-detector diffractometer | 6027 independent reflections |
Radiation source: sealed tube | 4962 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.030 |
φ and ω scans | θmax = 30.1°, θmin = 2.4° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −22→22 |
Tmin = 0.928, Tmax = 0.949 | k = −10→10 |
23337 measured reflections | l = −23→23 |
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) = 0.102 | H-atom parameters constrained |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0476P)2 + 0.7947P] where P = (Fo2 + 2Fc2)/3 |
6027 reflections | (Δ/σ)max = 0.001 |
265 parameters | Δρmax = 0.43 e Å−3 |
0 restraints | Δρmin = −0.46 e Å−3 |
C22H22O5S2 | V = 2054.35 (4) Å3 |
Mr = 430.54 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 16.1955 (2) Å | µ = 0.29 mm−1 |
b = 7.5777 (1) Å | T = 100 K |
c = 16.7706 (2) Å | 0.26 × 0.20 × 0.18 mm |
β = 93.490 (1)° |
Bruker APEXII CCD area-detector diffractometer | 6027 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 4962 reflections with I > 2σ(I) |
Tmin = 0.928, Tmax = 0.949 | Rint = 0.030 |
23337 measured reflections |
R[F2 > 2σ(F2)] = 0.038 | 0 restraints |
wR(F2) = 0.102 | H-atom parameters constrained |
S = 1.04 | Δρmax = 0.43 e Å−3 |
6027 reflections | Δρmin = −0.46 e Å−3 |
265 parameters |
Experimental. The crystal was placed in the cold stream of an Oxford Cryosystems Cobra open-flow nitrogen cryostat (Cosier & Glazer, 1986) operating at 120.0 (1) K. |
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds 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 > 2sigma(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 | 0.15320 (2) | −0.05956 (5) | 0.46899 (2) | 0.02686 (9) | |
S2 | 0.05511 (2) | 0.83742 (5) | 0.76099 (2) | 0.02604 (9) | |
O1 | 0.26302 (6) | −0.04470 (12) | 0.61509 (6) | 0.0210 (2) | |
O2 | 0.11405 (6) | 0.57870 (14) | 0.64643 (6) | 0.0245 (2) | |
O3 | 0.31333 (5) | 0.28911 (14) | 0.48626 (5) | 0.0200 (2) | |
O4 | 0.60447 (5) | 0.28712 (14) | 0.57867 (6) | 0.0221 (2) | |
O5 | 0.56590 (6) | 0.37664 (15) | 0.72042 (6) | 0.0228 (2) | |
C1 | 0.07060 (9) | 0.0369 (2) | 0.41872 (9) | 0.0287 (3) | |
H1A | 0.0469 | −0.0046 | 0.3690 | 0.034* | |
C2 | 0.04213 (9) | 0.1804 (2) | 0.45787 (9) | 0.0261 (3) | |
H2A | −0.0042 | 0.2484 | 0.4388 | 0.031* | |
C3 | 0.08930 (8) | 0.21756 (18) | 0.53040 (8) | 0.0203 (3) | |
H3A | 0.0790 | 0.3136 | 0.5648 | 0.024* | |
C4 | 0.15231 (8) | 0.09482 (17) | 0.54423 (8) | 0.0171 (2) | |
C5 | 0.21609 (7) | 0.08266 (16) | 0.60996 (7) | 0.0154 (2) | |
C6 | 0.22329 (7) | 0.23228 (17) | 0.66977 (7) | 0.0158 (2) | |
H6A | 0.2561 | 0.1920 | 0.7181 | 0.019* | |
H6B | 0.1674 | 0.2641 | 0.6858 | 0.019* | |
C7 | 0.26495 (7) | 0.39825 (16) | 0.63566 (7) | 0.0144 (2) | |
H7A | 0.2345 | 0.4293 | 0.5839 | 0.017* | |
C8 | 0.25704 (7) | 0.55376 (17) | 0.69304 (8) | 0.0169 (2) | |
H8A | 0.2753 | 0.5152 | 0.7477 | 0.020* | |
H8B | 0.2946 | 0.6493 | 0.6777 | 0.020* | |
C9 | 0.16998 (8) | 0.62670 (17) | 0.69406 (8) | 0.0176 (2) | |
C10 | 0.15454 (8) | 0.75825 (17) | 0.75553 (8) | 0.0172 (2) | |
C11 | 0.20817 (8) | 0.83333 (17) | 0.81330 (8) | 0.0184 (2) | |
H11A | 0.2656 | 0.8079 | 0.8194 | 0.022* | |
C12 | 0.16658 (9) | 0.95354 (18) | 0.86262 (8) | 0.0229 (3) | |
H12A | 0.1931 | 1.0169 | 0.9059 | 0.027* | |
C13 | 0.08427 (9) | 0.96710 (19) | 0.84048 (9) | 0.0269 (3) | |
H13A | 0.0472 | 1.0412 | 0.8668 | 0.032* | |
C14 | 0.35481 (7) | 0.36293 (16) | 0.61902 (7) | 0.0141 (2) | |
C15 | 0.37699 (7) | 0.31052 (16) | 0.54348 (7) | 0.0152 (2) | |
C16 | 0.46025 (7) | 0.28376 (17) | 0.52796 (7) | 0.0164 (2) | |
H16A | 0.4744 | 0.2485 | 0.4762 | 0.020* | |
C17 | 0.52174 (7) | 0.30865 (17) | 0.58790 (8) | 0.0163 (2) | |
C18 | 0.50086 (7) | 0.35820 (17) | 0.66468 (7) | 0.0161 (2) | |
C19 | 0.41810 (7) | 0.38428 (17) | 0.67889 (7) | 0.0155 (2) | |
H19A | 0.4040 | 0.4177 | 0.7309 | 0.019* | |
C20 | 0.33368 (9) | 0.2389 (2) | 0.40790 (8) | 0.0235 (3) | |
H20A | 0.2827 | 0.2213 | 0.3742 | 0.035* | |
H20B | 0.3655 | 0.1288 | 0.4107 | 0.035* | |
H20C | 0.3668 | 0.3320 | 0.3849 | 0.035* | |
C21 | 0.62830 (8) | 0.2351 (2) | 0.50147 (8) | 0.0224 (3) | |
H21A | 0.6888 | 0.2286 | 0.5018 | 0.034* | |
H21B | 0.6079 | 0.3219 | 0.4617 | 0.034* | |
H21C | 0.6046 | 0.1191 | 0.4880 | 0.034* | |
C22 | 0.54575 (8) | 0.39764 (19) | 0.80143 (8) | 0.0205 (3) | |
H22A | 0.5967 | 0.4118 | 0.8354 | 0.031* | |
H22B | 0.5158 | 0.2931 | 0.8184 | 0.031* | |
H22C | 0.5109 | 0.5024 | 0.8061 | 0.031* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.02481 (18) | 0.0312 (2) | 0.02430 (18) | −0.00215 (14) | −0.00106 (13) | −0.00875 (14) |
S2 | 0.01850 (16) | 0.02694 (18) | 0.0325 (2) | 0.00698 (13) | −0.00001 (13) | −0.00871 (14) |
O1 | 0.0187 (4) | 0.0189 (5) | 0.0252 (5) | 0.0036 (4) | 0.0008 (4) | −0.0002 (4) |
O2 | 0.0178 (4) | 0.0264 (5) | 0.0284 (5) | 0.0055 (4) | −0.0049 (4) | −0.0080 (4) |
O3 | 0.0151 (4) | 0.0313 (5) | 0.0136 (4) | 0.0000 (4) | 0.0000 (3) | −0.0038 (4) |
O4 | 0.0122 (4) | 0.0352 (6) | 0.0194 (5) | 0.0024 (4) | 0.0040 (3) | −0.0034 (4) |
O5 | 0.0134 (4) | 0.0392 (6) | 0.0156 (4) | 0.0004 (4) | −0.0007 (3) | −0.0041 (4) |
C1 | 0.0254 (7) | 0.0389 (9) | 0.0209 (7) | −0.0112 (6) | −0.0061 (5) | 0.0037 (6) |
C2 | 0.0195 (6) | 0.0287 (7) | 0.0292 (7) | −0.0066 (5) | −0.0054 (5) | 0.0131 (6) |
C3 | 0.0166 (6) | 0.0212 (6) | 0.0227 (6) | −0.0059 (5) | −0.0017 (5) | 0.0037 (5) |
C4 | 0.0155 (5) | 0.0176 (6) | 0.0183 (6) | −0.0029 (4) | 0.0008 (4) | −0.0005 (5) |
C5 | 0.0130 (5) | 0.0167 (6) | 0.0168 (6) | −0.0014 (4) | 0.0031 (4) | 0.0008 (4) |
C6 | 0.0143 (5) | 0.0171 (6) | 0.0162 (6) | −0.0001 (4) | 0.0023 (4) | −0.0006 (4) |
C7 | 0.0124 (5) | 0.0155 (5) | 0.0152 (5) | 0.0008 (4) | 0.0011 (4) | −0.0006 (4) |
C8 | 0.0131 (5) | 0.0180 (6) | 0.0194 (6) | 0.0017 (4) | 0.0002 (4) | −0.0030 (5) |
C9 | 0.0162 (6) | 0.0167 (6) | 0.0199 (6) | 0.0024 (4) | 0.0007 (5) | −0.0004 (5) |
C10 | 0.0154 (5) | 0.0169 (6) | 0.0195 (6) | 0.0023 (4) | 0.0022 (4) | 0.0002 (5) |
C11 | 0.0193 (6) | 0.0177 (6) | 0.0183 (6) | 0.0009 (5) | 0.0023 (5) | −0.0007 (5) |
C12 | 0.0273 (7) | 0.0214 (6) | 0.0202 (6) | −0.0016 (5) | 0.0029 (5) | −0.0034 (5) |
C13 | 0.0291 (7) | 0.0223 (7) | 0.0300 (7) | 0.0041 (6) | 0.0082 (6) | −0.0074 (6) |
C14 | 0.0129 (5) | 0.0146 (5) | 0.0149 (5) | 0.0003 (4) | 0.0021 (4) | 0.0005 (4) |
C15 | 0.0145 (5) | 0.0169 (6) | 0.0141 (5) | −0.0007 (4) | −0.0001 (4) | 0.0011 (4) |
C16 | 0.0163 (5) | 0.0188 (6) | 0.0146 (6) | 0.0007 (4) | 0.0038 (4) | −0.0003 (4) |
C17 | 0.0127 (5) | 0.0189 (6) | 0.0174 (6) | 0.0006 (4) | 0.0030 (4) | 0.0004 (5) |
C18 | 0.0138 (5) | 0.0191 (6) | 0.0152 (6) | 0.0002 (4) | 0.0000 (4) | 0.0000 (4) |
C19 | 0.0149 (5) | 0.0175 (6) | 0.0144 (5) | 0.0004 (4) | 0.0020 (4) | −0.0008 (4) |
C20 | 0.0236 (6) | 0.0320 (7) | 0.0148 (6) | 0.0027 (6) | −0.0004 (5) | −0.0045 (5) |
C21 | 0.0189 (6) | 0.0279 (7) | 0.0212 (6) | 0.0034 (5) | 0.0072 (5) | −0.0021 (5) |
C22 | 0.0178 (6) | 0.0279 (7) | 0.0156 (6) | 0.0006 (5) | −0.0008 (5) | −0.0024 (5) |
S1—C1 | 1.7021 (16) | C8—H8A | 0.9900 |
S1—C4 | 1.7214 (13) | C8—H8B | 0.9900 |
S2—C13 | 1.6998 (15) | C9—C10 | 1.4665 (18) |
S2—C10 | 1.7261 (13) | C10—C11 | 1.3835 (19) |
O1—C5 | 1.2283 (15) | C11—C12 | 1.4266 (18) |
O2—C9 | 1.2259 (16) | C11—H11A | 0.9500 |
O3—C15 | 1.3747 (15) | C12—C13 | 1.366 (2) |
O3—C20 | 1.4258 (15) | C12—H12A | 0.9500 |
O4—C17 | 1.3678 (14) | C13—H13A | 0.9500 |
O4—C21 | 1.4288 (16) | C14—C15 | 1.3954 (16) |
O5—C18 | 1.3722 (15) | C14—C19 | 1.3998 (17) |
O5—C22 | 1.4253 (15) | C15—C16 | 1.4035 (16) |
C1—C2 | 1.365 (2) | C16—C17 | 1.3842 (18) |
C1—H1A | 0.9500 | C16—H16A | 0.9500 |
C2—C3 | 1.425 (2) | C17—C18 | 1.4022 (17) |
C2—H2A | 0.9500 | C18—C19 | 1.3897 (16) |
C3—C4 | 1.3897 (19) | C19—H19A | 0.9500 |
C3—H3A | 0.9500 | C20—H20A | 0.9800 |
C4—C5 | 1.4669 (18) | C20—H20B | 0.9800 |
C5—C6 | 1.5136 (17) | C20—H20C | 0.9800 |
C6—C7 | 1.5527 (17) | C21—H21A | 0.9800 |
C6—H6A | 0.9900 | C21—H21B | 0.9800 |
C6—H6B | 0.9900 | C21—H21C | 0.9800 |
C7—C14 | 1.5222 (16) | C22—H22A | 0.9800 |
C7—C8 | 1.5317 (17) | C22—H22B | 0.9800 |
C7—H7A | 1.0000 | C22—H22C | 0.9800 |
C8—C9 | 1.5155 (17) | ||
C1—S1—C4 | 91.71 (7) | C10—C11—H11A | 124.1 |
C13—S2—C10 | 91.55 (7) | C12—C11—H11A | 124.1 |
C15—O3—C20 | 117.99 (10) | C13—C12—C11 | 112.20 (13) |
C17—O4—C21 | 117.13 (10) | C13—C12—H12A | 123.9 |
C18—O5—C22 | 116.74 (10) | C11—C12—H12A | 123.9 |
C2—C1—S1 | 112.47 (11) | C12—C13—S2 | 112.93 (11) |
C2—C1—H1A | 123.8 | C12—C13—H13A | 123.5 |
S1—C1—H1A | 123.8 | S2—C13—H13A | 123.5 |
C1—C2—C3 | 112.88 (13) | C15—C14—C19 | 117.79 (11) |
C1—C2—H2A | 123.6 | C15—C14—C7 | 121.22 (11) |
C3—C2—H2A | 123.6 | C19—C14—C7 | 120.98 (10) |
C4—C3—C2 | 111.13 (13) | O3—C15—C14 | 116.35 (10) |
C4—C3—H3A | 124.4 | O3—C15—C16 | 122.80 (11) |
C2—C3—H3A | 124.4 | C14—C15—C16 | 120.85 (11) |
C3—C4—C5 | 130.07 (12) | C17—C16—C15 | 120.17 (11) |
C3—C4—S1 | 111.80 (10) | C17—C16—H16A | 119.9 |
C5—C4—S1 | 118.11 (9) | C15—C16—H16A | 119.9 |
O1—C5—C4 | 120.42 (12) | O4—C17—C16 | 124.60 (11) |
O1—C5—C6 | 121.32 (12) | O4—C17—C18 | 115.38 (11) |
C4—C5—C6 | 118.25 (11) | C16—C17—C18 | 120.02 (11) |
C5—C6—C7 | 112.35 (10) | O5—C18—C19 | 125.25 (11) |
C5—C6—H6A | 109.1 | O5—C18—C17 | 115.77 (10) |
C7—C6—H6A | 109.1 | C19—C18—C17 | 118.98 (11) |
C5—C6—H6B | 109.1 | C18—C19—C14 | 122.17 (11) |
C7—C6—H6B | 109.1 | C18—C19—H19A | 118.9 |
H6A—C6—H6B | 107.9 | C14—C19—H19A | 118.9 |
C14—C7—C8 | 111.59 (10) | O3—C20—H20A | 109.5 |
C14—C7—C6 | 111.52 (10) | O3—C20—H20B | 109.5 |
C8—C7—C6 | 109.69 (10) | H20A—C20—H20B | 109.5 |
C14—C7—H7A | 108.0 | O3—C20—H20C | 109.5 |
C8—C7—H7A | 108.0 | H20A—C20—H20C | 109.5 |
C6—C7—H7A | 108.0 | H20B—C20—H20C | 109.5 |
C9—C8—C7 | 113.65 (10) | O4—C21—H21A | 109.5 |
C9—C8—H8A | 108.8 | O4—C21—H21B | 109.5 |
C7—C8—H8A | 108.8 | H21A—C21—H21B | 109.5 |
C9—C8—H8B | 108.8 | O4—C21—H21C | 109.5 |
C7—C8—H8B | 108.8 | H21A—C21—H21C | 109.5 |
H8A—C8—H8B | 107.7 | H21B—C21—H21C | 109.5 |
O2—C9—C10 | 120.59 (11) | O5—C22—H22A | 109.5 |
O2—C9—C8 | 122.38 (12) | O5—C22—H22B | 109.5 |
C10—C9—C8 | 117.03 (11) | H22A—C22—H22B | 109.5 |
C11—C10—C9 | 130.18 (11) | O5—C22—H22C | 109.5 |
C11—C10—S2 | 111.58 (9) | H22A—C22—H22C | 109.5 |
C9—C10—S2 | 118.23 (10) | H22B—C22—H22C | 109.5 |
C10—C11—C12 | 111.72 (12) | ||
C4—S1—C1—C2 | −0.79 (12) | C11—C12—C13—S2 | 0.05 (17) |
S1—C1—C2—C3 | 1.29 (16) | C10—S2—C13—C12 | 0.45 (12) |
C1—C2—C3—C4 | −1.21 (17) | C8—C7—C14—C15 | −142.95 (12) |
C2—C3—C4—C5 | 178.95 (12) | C6—C7—C14—C15 | 93.99 (14) |
C2—C3—C4—S1 | 0.60 (14) | C8—C7—C14—C19 | 36.21 (16) |
C1—S1—C4—C3 | 0.09 (10) | C6—C7—C14—C19 | −86.85 (14) |
C1—S1—C4—C5 | −178.48 (10) | C20—O3—C15—C14 | 178.82 (12) |
C3—C4—C5—O1 | 174.25 (13) | C20—O3—C15—C16 | −0.50 (18) |
S1—C4—C5—O1 | −7.49 (16) | C19—C14—C15—O3 | 179.39 (11) |
C3—C4—C5—C6 | −6.94 (19) | C7—C14—C15—O3 | −1.42 (17) |
S1—C4—C5—C6 | 171.32 (9) | C19—C14—C15—C16 | −1.26 (18) |
O1—C5—C6—C7 | 103.44 (13) | C7—C14—C15—C16 | 177.92 (11) |
C4—C5—C6—C7 | −75.37 (13) | O3—C15—C16—C17 | 179.52 (11) |
C5—C6—C7—C14 | −65.51 (13) | C14—C15—C16—C17 | 0.22 (19) |
C5—C6—C7—C8 | 170.36 (10) | C21—O4—C17—C16 | −0.06 (19) |
C14—C7—C8—C9 | 164.10 (10) | C21—O4—C17—C18 | 179.46 (12) |
C6—C7—C8—C9 | −71.81 (13) | C15—C16—C17—O4 | −179.56 (12) |
C7—C8—C9—O2 | −8.19 (18) | C15—C16—C17—C18 | 0.94 (19) |
C7—C8—C9—C10 | 171.37 (11) | C22—O5—C18—C19 | 10.08 (19) |
O2—C9—C10—C11 | −178.32 (14) | C22—O5—C18—C17 | −169.80 (12) |
C8—C9—C10—C11 | 2.1 (2) | O4—C17—C18—O5 | −0.66 (17) |
O2—C9—C10—S2 | 2.17 (18) | C16—C17—C18—O5 | 178.88 (12) |
C8—C9—C10—S2 | −177.40 (9) | O4—C17—C18—C19 | 179.45 (11) |
C13—S2—C10—C11 | −0.83 (11) | C16—C17—C18—C19 | −1.01 (19) |
C13—S2—C10—C9 | 178.76 (11) | O5—C18—C19—C14 | −179.96 (12) |
C9—C10—C11—C12 | −178.53 (13) | C17—C18—C19—C14 | −0.08 (19) |
S2—C10—C11—C12 | 1.00 (15) | C15—C14—C19—C18 | 1.20 (19) |
C10—C11—C12—C13 | −0.68 (17) | C7—C14—C19—C18 | −177.99 (11) |
Cg2 is the centroid of the C14–C19 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C2—H2A···O2i | 0.95 | 2.57 | 3.5002 (18) | 166 |
C3—H3A···O2 | 0.95 | 2.48 | 3.3677 (17) | 156 |
C8—H8B···O1ii | 0.99 | 2.58 | 3.3154 (16) | 131 |
C21—H21A···O1iii | 0.98 | 2.57 | 3.0692 (17) | 112 |
C22—H22A···O1iv | 0.98 | 2.39 | 3.3489 (16) | 165 |
C21—H21B···Cg2v | 0.98 | 2.91 | 3.8317 (16) | 158 |
Symmetry codes: (i) −x, −y+1, −z+1; (ii) x, y+1, z; (iii) −x+1, −y, −z+1; (iv) −x+1, y+1/2, −z+3/2; (v) −x+1, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C22H22O5S2 |
Mr | 430.54 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 100 |
a, b, c (Å) | 16.1955 (2), 7.5777 (1), 16.7706 (2) |
β (°) | 93.490 (1) |
V (Å3) | 2054.35 (4) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.29 |
Crystal size (mm) | 0.26 × 0.20 × 0.18 |
Data collection | |
Diffractometer | Bruker APEXII CCD area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.928, 0.949 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 23337, 6027, 4962 |
Rint | 0.030 |
(sin θ/λ)max (Å−1) | 0.705 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.038, 0.102, 1.04 |
No. of reflections | 6027 |
No. of parameters | 265 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.43, −0.46 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
Cg2 is the centroid of the C14–C19 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C2—H2A···O2i | 0.95 | 2.57 | 3.5002 (18) | 166 |
C3—H3A···O2 | 0.95 | 2.48 | 3.3677 (17) | 156 |
C8—H8B···O1ii | 0.99 | 2.58 | 3.3154 (16) | 131 |
C21—H21A···O1iii | 0.98 | 2.57 | 3.0692 (17) | 112 |
C22—H22A···O1iv | 0.98 | 2.39 | 3.3489 (16) | 165 |
C21—H21B···Cg2v | 0.98 | 2.91 | 3.8317 (16) | 158 |
Symmetry codes: (i) −x, −y+1, −z+1; (ii) x, y+1, z; (iii) −x+1, −y, −z+1; (iv) −x+1, y+1/2, −z+3/2; (v) −x+1, −y+1, −z+1. |
Acknowledgements
TS thanks the Crystal Materials Research Unit for financial support. NW thanks the Prince of Songkla University for a postdoctoral fellowship. The authors also thank the Prince of Songkla University and Universiti Sains Malaysia for the Research University Grant No. 1001/PFIZIK/811160.
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.
Ketones are obviously one of the most important compounds in organic chemistry. There are many interesting applications of the compounds with the ketone group and the heterocyclic unit, which exhibit not only bioactivity such as antibacterial (Rai et al., 2008), anti-inflammatory (Pillai et al., 2004) and analgesic (Alagarsamy et al., 2007) activities, but also fluorescent property (Favaro et al., 2002). The 1,5-diketone compound is conventionally prepared by the oxidative cleavage of cyclopentenes or the conjugate addition of enolates to α,β-unsaturated ketones (Harrowven & Hannam, 1999).
In the molecule of the title compound (Fig. 1), the pentane-1,5-dione unit (C5–C9/O1/O2) is puckered with the torsion angles C5–C6–C7–C8 = 170.36 (10)° and C6–C7–C8–C9 = -71.81 (13)°, making the two ketone groups pointing towards opposite directions. A weak intramolecular C3—H3A···O2 interaction (Table 1) which generates an S(9) ring motif (Bernstein et al., 1995) helps to stabilize this conformation. The dihedral angle between the two thiophene rings is 26.67 (7)°. The 2,4,5-trimethoxyphenyl ring makes dihedral angles of 41.51 (6) and 25.83 (6)° with the S1/C1–C4 and S2/C10–C13 thiophene rings, respectively. The three substituted methoxy groups of 2,4,5-trimethoxyphenyl unit have two different orientations in which the ortho- and para-methoxy groups (at atom C15 and C17 positions) are co-planar with the phenyl ring with torsion angles C20–O3–C15–C16 = -0.50 (18)° and C21–O4–C17–C18 = 179.46 (12)° whereas the meta-methoxy (at atom C18) is twisted with the torsion angle C22–O5–C18–C19 = 10.08 (19)° The bond distances in (I) are in normal ranges (Allen et al., 1987).
In the crystal packing (Fig. 2), the molecules are linked into a three dimensional network through the enone unit by weak C—H···O interactions (Table 1), a weak C—H···π interaction (Table 1) and a π–π interaction with a Cg1···Cg1 distance of 3.6527 (8) Å; Cg1 is the centroid of S1/C1–C4 thiophene ring.