organic compounds
2-Oxo-2H-chromen-4-yl 4-methoxybenzoate
aLaboratoire de Cristallographie et Physique Moléculaire, UFR SSMT, Université de Cocody, 22 BP 582 Abidjan 22, Côte d'Ivoire, bLaboratoire de Chimie Bio-organique et de Phytochimie, Université de Ouagadougou, 03 BP 7021 Ouagadougou 03, Burkina Faso, and cLaboratoire de Physique des Interactions Ioniques et Moléculaires, Equipe-Spectrométries et Dynamique Moléculaire, Centre Saint Jérôme, Université de Provence, 13397 Marseille, France
*Correspondence e-mail: abou_akoun@yahoo.fr
In the title molecule, C17H12O5, the chromen-2-one ring and the 4-methoxybenzoate side chain are inclined to one another at a dihedral angle of 69.82 (9)°. The features parallel sheets of centrosymmetric R22(6) dimers joined by a C(7) chain, resulting in centrosymetric tetramers of hydrogen-bonded molecules with graph-set motif R44(40). These centrosymetric tetramers are connected by a pair of hydrogen bonds described by an R22(8) ring motif and a C(7) chain via C—H⋯O interactions. In the structure, there are also π–π stacking interactions between chromene benzene and the six-membered heterocyclic rings [centroid–centroid distance = 3.691 (2) Å] and weak C=O⋯π interactions [O⋯(ring centroid) distance = 3.357 (3) Å].
Related literature
For the biological activity of coumarin derivatives, see: Basanagouda et al. (2009); Vukovic et al. (2010); Emmanuel-Giota et al. (2001); Marchenko et al. (2006). For hydrogen-bond motifs, see: Bernstein et al. (1995). For π–π stacking interactions, see: Janiak (2000).
Experimental
Crystal data
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Data collection
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Refinement
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Data collection: COLLECT (Hooft, 1998); cell DENZO/SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO/SCALEPACK; program(s) used to solve structure: SIR2004 (Burla et al., 2005); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97, publCIF (Westrip, 2010) and WinGX (Farrugia, 2012).
Supporting information
10.1107/S1600536812047666/zs2245sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812047666/zs2245Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812047666/zs2245Isup3.cml
To a solution of 4-methoxybenzoyl chloride (40 mmol) in dried tetrahydrofuran (150 ml), was added dried triethylamine (120 mmol) and 4-hydroxycoumarin (40 mmol)in small portions over 30 min. The mixture was then refluxed for 3 h and poured in 300 ml of chloroform. The solution was acidified with dilute hydrochloric acid until the pH was 2–3. The organic layer was extracted, washed with water, dried over MgSO4 and the solvent removed. The crude product was recrystallized from chloroform. Colourless crystals of the title compound were obtained in a good yield (84%); m.p. 421–422 K. 1H NMR (Bruker TOPSPIN, CDCl3, 400 MHz, p.p.m.) δ: 6.63 (s, 1H, H8); 7.43 (d, 1H, H2); 7.33 (t.d, 1H, H3); 7.61 (t.d,1H, H4); 7.73 (d, 1H, H5); 8.2 (d, 2H, H12 and H16); 7.05 (d, 2H, H13 and H15); 3.93 (s, 3H, CH3). 13C NMR (Bruker TOPSPIN, CDCl3, 100 MHz, p.p.m.) δ: 162 (C7); 108 (C8); 161 (C9); 127 (C2); 124 (C3); 117 (C4); 126 (C5); 153 (C6); 115 (C1); 165 (C10); 160 (C11); 133 (C12 and C16); 113 (C13 and C15); 120 (C14); 55 (C17).
H atoms were placed in calculated positions [C—H = 0.93 (aromatic) or 0.96 Å (methyl group)] and refined using a riding model approximation with Uiso(H) constrained to 1.2 (aromatic) or 1.5 (methyl) times Ueq of the respective parent atom. The five reflections (1 - 5 17), (0 - 1 1), (0 0 1), (0 1 0), (1 0 1) were found to have too low intensities, caused by a systematic error, probably by shielding by the beam stop interference. They were omitted from the refinement.
Data collection: COLLECT (Hooft, 1998); cell
DENZO/SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO/SCALEPACK (Otwinowski & Minor, 1997); program(s) used to solve structure: SIR2004 (Burla et al., 2005); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008), publCIF (Westrip, 2010) and WinGX (Farrugia, 2012).C17H12O5 | Z = 2 |
Mr = 296.27 | F(000) = 308 |
Triclinic, P1 | Dx = 1.433 Mg m−3 |
Hall symbol: -P 1 | Melting point = 421–422 K |
a = 4.371 (1) Å | Mo Kα radiation, λ = 0.71073 Å |
b = 10.535 (4) Å | Cell parameters from 5683 reflections |
c = 15.193 (2) Å | θ = 2.3–27.0° |
α = 85.218 (3)° | µ = 0.11 mm−1 |
β = 83.688 (2)° | T = 298 K |
γ = 81.893 (1)° | Prism, colourless |
V = 686.8 (3) Å3 | 0.25 × 0.15 × 0.04 mm |
Nonius KappaCCD diffractometer | 1540 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.055 |
Graphite monochromator | θmax = 27.0°, θmin = 2.3° |
ϕ and ω scans | h = 0→5 |
5683 measured reflections | k = −12→13 |
2731 independent reflections | l = −18→19 |
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)] = 0.066 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.163 | H-atom parameters constrained |
S = 1.11 | w = 1/[σ2(Fo2) + (0.0324P)2 + 0.5861P] where P = (Fo2 + 2Fc2)/3 |
2731 reflections | (Δ/σ)max < 0.001 |
200 parameters | Δρmax = 0.17 e Å−3 |
0 restraints | Δρmin = −0.23 e Å−3 |
48 constraints |
C17H12O5 | γ = 81.893 (1)° |
Mr = 296.27 | V = 686.8 (3) Å3 |
Triclinic, P1 | Z = 2 |
a = 4.371 (1) Å | Mo Kα radiation |
b = 10.535 (4) Å | µ = 0.11 mm−1 |
c = 15.193 (2) Å | T = 298 K |
α = 85.218 (3)° | 0.25 × 0.15 × 0.04 mm |
β = 83.688 (2)° |
Nonius KappaCCD diffractometer | 1540 reflections with I > 2σ(I) |
5683 measured reflections | Rint = 0.055 |
2731 independent reflections |
R[F2 > 2σ(F2)] = 0.066 | 0 restraints |
wR(F2) = 0.163 | H-atom parameters constrained |
S = 1.11 | Δρmax = 0.17 e Å−3 |
2731 reflections | Δρmin = −0.23 e Å−3 |
200 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 | ||
O3 | 0.1598 (5) | 0.05340 (19) | 0.31179 (13) | 0.0542 (6) | |
O1 | −0.3230 (5) | 0.3325 (2) | 0.47003 (14) | 0.0528 (6) | |
O2 | −0.5808 (6) | 0.1879 (2) | 0.54685 (17) | 0.0722 (7) | |
C11 | 0.2683 (7) | −0.0573 (3) | 0.1811 (2) | 0.0447 (7) | |
O4 | −0.1068 (6) | 0.1288 (2) | 0.19569 (15) | 0.0656 (7) | |
O5 | 0.7433 (6) | −0.3598 (2) | 0.04518 (16) | 0.0702 (7) | |
C5 | −0.0670 (8) | 0.4966 (3) | 0.3926 (2) | 0.0525 (8) | |
H5 | −0.1839 | 0.5552 | 0.4297 | 0.063* | |
C9 | −0.0098 (7) | 0.1490 (3) | 0.3629 (2) | 0.0459 (8) | |
C1 | 0.0601 (7) | 0.2784 (3) | 0.3473 (2) | 0.0443 (7) | |
C6 | −0.1068 (7) | 0.3679 (3) | 0.4027 (2) | 0.0455 (8) | |
C14 | 0.5790 (7) | −0.2567 (3) | 0.0861 (2) | 0.0512 (8) | |
C10 | 0.0876 (8) | 0.0505 (3) | 0.2267 (2) | 0.0500 (8) | |
C4 | 0.1473 (8) | 0.5360 (3) | 0.3273 (2) | 0.0586 (9) | |
H4 | 0.1758 | 0.6222 | 0.3199 | 0.070* | |
C7 | −0.3849 (8) | 0.2081 (3) | 0.4861 (2) | 0.0532 (8) | |
C12 | 0.4725 (7) | −0.1501 (3) | 0.2215 (2) | 0.0510 (8) | |
H12 | 0.5054 | −0.1455 | 0.2805 | 0.061* | |
C15 | 0.3792 (8) | −0.1649 (3) | 0.0454 (2) | 0.0612 (10) | |
H15 | 0.3468 | −0.1691 | −0.0138 | 0.073* | |
C8 | −0.2172 (8) | 0.1147 (3) | 0.4278 (2) | 0.0520 (8) | |
H8 | −0.2550 | 0.0296 | 0.4359 | 0.062* | |
C13 | 0.6278 (8) | −0.2498 (3) | 0.1738 (2) | 0.0565 (9) | |
H13 | 0.7656 | −0.3125 | 0.2008 | 0.068* | |
C16 | 0.2264 (8) | −0.0658 (3) | 0.0939 (2) | 0.0618 (10) | |
H16 | 0.0905 | −0.0027 | 0.0665 | 0.074* | |
C3 | 0.3223 (8) | 0.4490 (3) | 0.2719 (2) | 0.0585 (9) | |
H3 | 0.4692 | 0.4768 | 0.2283 | 0.070* | |
C2 | 0.2795 (7) | 0.3217 (3) | 0.2813 (2) | 0.0525 (8) | |
H2 | 0.3965 | 0.2639 | 0.2437 | 0.063* | |
C17 | 0.7156 (10) | −0.3667 (4) | −0.0473 (2) | 0.0784 (12) | |
H17A | 0.5023 | −0.3692 | −0.0560 | 0.118* | |
H17B | 0.8401 | −0.4429 | −0.0680 | 0.118* | |
H17C | 0.7859 | −0.2924 | −0.0800 | 0.118* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O3 | 0.0695 (15) | 0.0459 (12) | 0.0453 (13) | 0.0091 (10) | −0.0096 (11) | −0.0155 (10) |
O1 | 0.0634 (14) | 0.0459 (13) | 0.0478 (13) | −0.0031 (10) | 0.0020 (11) | −0.0138 (10) |
O2 | 0.0892 (19) | 0.0661 (16) | 0.0575 (16) | −0.0115 (13) | 0.0144 (14) | −0.0096 (12) |
C11 | 0.0515 (19) | 0.0393 (17) | 0.0429 (18) | −0.0017 (13) | −0.0024 (14) | −0.0103 (14) |
O4 | 0.0724 (16) | 0.0624 (15) | 0.0601 (15) | 0.0189 (12) | −0.0207 (13) | −0.0215 (12) |
O5 | 0.0938 (19) | 0.0529 (14) | 0.0594 (16) | 0.0174 (13) | −0.0090 (13) | −0.0219 (12) |
C5 | 0.060 (2) | 0.0451 (19) | 0.054 (2) | 0.0007 (15) | −0.0131 (17) | −0.0166 (15) |
C9 | 0.057 (2) | 0.0391 (17) | 0.0418 (18) | 0.0060 (14) | −0.0117 (16) | −0.0130 (14) |
C1 | 0.0482 (18) | 0.0443 (18) | 0.0404 (17) | 0.0026 (14) | −0.0096 (14) | −0.0106 (14) |
C6 | 0.0508 (19) | 0.0458 (18) | 0.0407 (18) | −0.0030 (14) | −0.0080 (15) | −0.0095 (14) |
C14 | 0.060 (2) | 0.0394 (17) | 0.053 (2) | 0.0007 (15) | −0.0023 (16) | −0.0139 (15) |
C10 | 0.055 (2) | 0.0488 (19) | 0.047 (2) | −0.0023 (16) | −0.0085 (16) | −0.0116 (15) |
C4 | 0.070 (2) | 0.047 (2) | 0.061 (2) | −0.0107 (17) | −0.0139 (19) | −0.0028 (17) |
C7 | 0.065 (2) | 0.049 (2) | 0.045 (2) | −0.0026 (16) | −0.0074 (17) | −0.0086 (15) |
C12 | 0.063 (2) | 0.0443 (18) | 0.0452 (19) | −0.0020 (15) | −0.0084 (16) | −0.0076 (15) |
C15 | 0.077 (2) | 0.059 (2) | 0.047 (2) | 0.0108 (18) | −0.0159 (18) | −0.0186 (17) |
C8 | 0.066 (2) | 0.0430 (18) | 0.0464 (19) | −0.0012 (15) | −0.0070 (17) | −0.0073 (15) |
C13 | 0.071 (2) | 0.0420 (18) | 0.053 (2) | 0.0105 (16) | −0.0108 (17) | −0.0073 (16) |
C16 | 0.078 (2) | 0.054 (2) | 0.051 (2) | 0.0165 (17) | −0.0171 (18) | −0.0157 (17) |
C3 | 0.065 (2) | 0.062 (2) | 0.051 (2) | −0.0137 (17) | −0.0056 (17) | −0.0051 (17) |
C2 | 0.056 (2) | 0.057 (2) | 0.0447 (19) | 0.0012 (16) | −0.0072 (16) | −0.0129 (15) |
C17 | 0.103 (3) | 0.071 (3) | 0.057 (2) | 0.015 (2) | −0.006 (2) | −0.029 (2) |
O3—C10 | 1.368 (4) | C14—C15 | 1.365 (4) |
O3—C9 | 1.400 (3) | C14—C13 | 1.381 (4) |
O1—C7 | 1.373 (4) | C4—C3 | 1.387 (5) |
O1—C6 | 1.379 (4) | C4—H4 | 0.9300 |
O2—C7 | 1.214 (4) | C7—C8 | 1.445 (4) |
C11—C16 | 1.369 (4) | C12—C13 | 1.381 (4) |
C11—C12 | 1.380 (4) | C12—H12 | 0.9300 |
C11—C10 | 1.467 (4) | C15—C16 | 1.379 (4) |
O4—C10 | 1.204 (4) | C15—H15 | 0.9300 |
O5—C14 | 1.370 (3) | C8—H8 | 0.9300 |
O5—C17 | 1.433 (4) | C13—H13 | 0.9300 |
C5—C4 | 1.368 (4) | C16—H16 | 0.9300 |
C5—C6 | 1.385 (4) | C3—C2 | 1.373 (4) |
C5—H5 | 0.9300 | C3—H3 | 0.9300 |
C9—C8 | 1.327 (4) | C2—H2 | 0.9300 |
C9—C1 | 1.434 (4) | C17—H17A | 0.9600 |
C1—C6 | 1.391 (4) | C17—H17B | 0.9600 |
C1—C2 | 1.403 (4) | C17—H17C | 0.9600 |
C10—O3—C9 | 117.2 (2) | O1—C7—C8 | 116.9 (3) |
C7—O1—C6 | 122.2 (2) | C11—C12—C13 | 119.6 (3) |
C16—C11—C12 | 119.0 (3) | C11—C12—H12 | 120.2 |
C16—C11—C10 | 117.4 (3) | C13—C12—H12 | 120.2 |
C12—C11—C10 | 123.6 (3) | C14—C15—C16 | 118.4 (3) |
C14—O5—C17 | 117.5 (3) | C14—C15—H15 | 120.8 |
C4—C5—C6 | 118.9 (3) | C16—C15—H15 | 120.8 |
C4—C5—H5 | 120.6 | C9—C8—C7 | 120.8 (3) |
C6—C5—H5 | 120.6 | C9—C8—H8 | 119.6 |
C8—C9—O3 | 118.5 (3) | C7—C8—H8 | 119.6 |
C8—C9—C1 | 122.3 (3) | C12—C13—C14 | 120.2 (3) |
O3—C9—C1 | 119.1 (3) | C12—C13—H13 | 119.9 |
C6—C1—C2 | 117.9 (3) | C14—C13—H13 | 119.9 |
C6—C1—C9 | 116.4 (3) | C11—C16—C15 | 122.1 (3) |
C2—C1—C9 | 125.7 (3) | C11—C16—H16 | 118.9 |
O1—C6—C5 | 116.8 (3) | C15—C16—H16 | 118.9 |
O1—C6—C1 | 121.3 (3) | C2—C3—C4 | 120.2 (3) |
C5—C6—C1 | 121.9 (3) | C2—C3—H3 | 119.9 |
C15—C14—O5 | 123.9 (3) | C4—C3—H3 | 119.9 |
C15—C14—C13 | 120.6 (3) | C3—C2—C1 | 120.4 (3) |
O5—C14—C13 | 115.5 (3) | C3—C2—H2 | 119.8 |
O4—C10—O3 | 121.8 (3) | C1—C2—H2 | 119.8 |
O4—C10—C11 | 125.8 (3) | O5—C17—H17A | 109.5 |
O3—C10—C11 | 112.4 (3) | O5—C17—H17B | 109.5 |
C5—C4—C3 | 120.8 (3) | H17A—C17—H17B | 109.5 |
C5—C4—H4 | 119.6 | O5—C17—H17C | 109.5 |
C3—C4—H4 | 119.6 | H17A—C17—H17C | 109.5 |
O2—C7—O1 | 116.6 (3) | H17B—C17—H17C | 109.5 |
O2—C7—C8 | 126.4 (3) | ||
C10—O3—C9—C8 | 107.7 (3) | C6—C5—C4—C3 | 0.0 (5) |
C10—O3—C9—C1 | −76.3 (4) | C6—O1—C7—O2 | −179.7 (3) |
C8—C9—C1—C6 | −1.4 (4) | C6—O1—C7—C8 | −1.3 (4) |
O3—C9—C1—C6 | −177.3 (3) | C16—C11—C12—C13 | −0.6 (5) |
C8—C9—C1—C2 | 178.8 (3) | C10—C11—C12—C13 | 178.6 (3) |
O3—C9—C1—C2 | 2.9 (5) | O5—C14—C15—C16 | 179.8 (3) |
C7—O1—C6—C5 | 179.5 (3) | C13—C14—C15—C16 | −0.3 (5) |
C7—O1—C6—C1 | 0.1 (4) | O3—C9—C8—C7 | 176.2 (3) |
C4—C5—C6—O1 | 179.4 (3) | C1—C9—C8—C7 | 0.3 (5) |
C4—C5—C6—C1 | −1.3 (5) | O2—C7—C8—C9 | 179.3 (3) |
C2—C1—C6—O1 | −179.0 (3) | O1—C7—C8—C9 | 1.1 (5) |
C9—C1—C6—O1 | 1.2 (4) | C11—C12—C13—C14 | 0.0 (5) |
C2—C1—C6—C5 | 1.7 (4) | C15—C14—C13—C12 | 0.5 (5) |
C9—C1—C6—C5 | −178.1 (3) | O5—C14—C13—C12 | −179.7 (3) |
C17—O5—C14—C15 | 3.8 (5) | C12—C11—C16—C15 | 0.7 (5) |
C17—O5—C14—C13 | −176.1 (3) | C10—C11—C16—C15 | −178.5 (3) |
C9—O3—C10—O4 | 2.2 (5) | C14—C15—C16—C11 | −0.3 (6) |
C9—O3—C10—C11 | −177.0 (3) | C5—C4—C3—C2 | 0.9 (5) |
C16—C11—C10—O4 | 4.1 (5) | C4—C3—C2—C1 | −0.5 (5) |
C12—C11—C10—O4 | −175.1 (3) | C6—C1—C2—C3 | −0.8 (5) |
C16—C11—C10—O3 | −176.7 (3) | C9—C1—C2—C3 | 179.0 (3) |
C12—C11—C10—O3 | 4.1 (4) |
D—H···A | D—H | H···A | D···A | D—H···A |
C8—H8···O2i | 0.93 | 2.48 | 3.407 (4) | 173 |
C2—H2···O4ii | 0.93 | 2.49 | 3.340 (4) | 151 |
C17—H17B···O5iii | 0.96 | 2.59 | 3.461 (4) | 151 |
Symmetry codes: (i) −x−1, −y, −z+1; (ii) x+1, y, z; (iii) −x+2, −y−1, −z. |
Experimental details
Crystal data | |
Chemical formula | C17H12O5 |
Mr | 296.27 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 298 |
a, b, c (Å) | 4.371 (1), 10.535 (4), 15.193 (2) |
α, β, γ (°) | 85.218 (3), 83.688 (2), 81.893 (1) |
V (Å3) | 686.8 (3) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.11 |
Crystal size (mm) | 0.25 × 0.15 × 0.04 |
Data collection | |
Diffractometer | Nonius KappaCCD diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5683, 2731, 1540 |
Rint | 0.055 |
(sin θ/λ)max (Å−1) | 0.638 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.066, 0.163, 1.11 |
No. of reflections | 2731 |
No. of parameters | 200 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.17, −0.23 |
Computer programs: COLLECT (Hooft, 1998), DENZO/SCALEPACK (Otwinowski & Minor, 1997), SIR2004 (Burla et al., 2005), PLATON (Spek, 2009), SHELXL97 (Sheldrick, 2008), publCIF (Westrip, 2010) and WinGX (Farrugia, 2012).
D—H···A | D—H | H···A | D···A | D—H···A |
C8—H8···O2i | 0.93 | 2.48 | 3.407 (4) | 173.3 |
C2—H2···O4ii | 0.93 | 2.49 | 3.340 (4) | 151.2 |
C17—H17B···O5iii | 0.96 | 2.59 | 3.461 (4) | 151.0 |
Symmetry codes: (i) −x−1, −y, −z+1; (ii) x+1, y, z; (iii) −x+2, −y−1, −z. |
Acknowledgements
The authors thank the Spectropôle Service of the Faculty of Sciences and Techniques of Saint Jérôme (France) for the use of the diffractometer and the NMR spectrometer.
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.
Coumarin constitutes one of the major classes of naturally occurring compounds and interest in its chemistry continues unabated because of its usefulness as a biologically active agent. It also represents the core structure of several molecules of pharmaceutical importance. Coumarin and its derivatives have been reported to serve as anti-bacterial (Basanagouda et al., 2009), anti-oxidant (Vukovic et al., 2010), anti-inflammatory (Emmanuel-Giota et al., 2001) and anti-tumour agents (Marchenko, et al., 2006). Therefore, the synthesis of new coumarin derivatives is of considerable interest. In order to study the influence of new substituents on the activity of the coumarin derivatives, the title compound, the ester C17H12O5 has been synthesized and its molecular and crystal structure is reported herein.
In the title compound (Fig. 1), the side chain is tilted with respect to the chromen-2-one ring with torsion angles C1—C9—O3—C10 = -76.3 (4)° and C8—C9—O3—C10 = 107.7 (3)°. The dihedral angle between the chromene ring and the side chain is 69.82 (9) °.
In the crystal structure, weak intermolecular C—H···O hydrogen bonds (Table 1) generate hydrogen-bonding motifs ranging from a chain to various rings. Indeed, in the methoxy group, an H atom of the methyl group (H17B) bonds to the oxygen atom of the same group on a neighbouring molecule (related by an inversion center) to form parallel sheets of centrosymetric dimers [graph set R22(6) (Bernstein et al., 1995)]. Also, a hydrogen of the chromene-benzene ring (H2) bonds to the oxygen atom of the carbonyl group of the side chain of a neighbouring molecule to form an infinite chain [graph set C(7)]. The combination of the C(7) chain and the R22(6) dimers results in a ring of hydrogen-bonded molecules described by the graph set R44(40) (Fig. 2). Further, the hydrogen of the six-membered heterocyclic ring bonds to the oxygen atom of the carbonyl group of the chromen-2-one moiety of an inversion-related neighbouring molecule to form a pair of hydrogen bonds [graph set R22(8)]. The latter hydrogen bonds and the C(7) chain connect the R44(40) centrosymmetric tetramers, resulting in a supramolecular aggregation (Fig. 3) which is further consolidated by weak C═ O···π interactions [O2···Cg1 (x - 1, y, z) = 3.357 (3) Å], where Cg1 is the centroid of the six-membered O containing ring, and π–π stacking between the chromene-benzene C1—C6 and the six-membered heterocyclic rings; in the latter, the centroid···centroid distance, [Cg2···Cg1 (x + 1, y, z) or Cg1···Cg2 (x - 1, y, z) = 3.691 (2) Å], is less than 3.8 Å, the maximum regarded as relevant for π–π interactions (Janiak, 2000) (Fig. 4).