organic compounds
Isopropyl 2-(5-methyl-3-methylsulfinyl-1-benzofuran-2-yl)acetate
aDepartment of Chemistry, Dongeui University, San 24 Kaya-dong, Busanjin-gu, Busan 614-714, Republic of Korea, and bDepartment of Chemistry, Pukyong National University, 599-1 Daeyeon 3-dong, Nam-gu, Busan 608-737, Republic of Korea
*Correspondence e-mail: uklee@pknu.ac.kr
The title compound, C15H18O4S, was prepared by the oxidation of isopropyl 2-(5-methyl-3-methylsulfanyl-1-benzofuran-2-yl)acetate with 3-chloroperoxybenzoic acid. The is stabilized by intermolecular π–π interactions between the benzene rings; the centroid–centroid distance between the adjacent benzene rings (symmetry code: ) is 3.713 (2) Å. In addition, C—H⋯π and weak intermolecular C—H⋯O interactions are present in the structure.
Related literature
For the crystal structures of similar 2-(5-methyl-3-methylsulfinyl-1-benzofuran-2-yl)acetic acid derivatives, see: Choi et al. (2007, 2008).
Experimental
Crystal data
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Data collection
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Refinement
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Data collection: SMART (Bruker, 2001); cell SAINT (Bruker, 2001); 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, 1998); software used to prepare material for publication: SHELXL97.
Supporting information
10.1107/S1600536808031796/fb2111sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808031796/fb2111Isup2.hkl
77% 3-chloroperoxybenzoic acid (471 mg, 2.1 mmol) was added in small portions to a stirred solution of isopropyl 2-(5-methyl-3-methylsulfanyl-1-benzofuran-2-yl)acetate (556 mg, 2.0 mmol) in dichloromethane (40 ml) at 273 K. After having been stirred for 3 h at room temperature, the mixture was washed with saturated sodium hydrogencarbonate solution and the organic layer was separated, dried over magnesium sulfate, filtered and concentrated under vacuum. The residue was purified by δ 1.25 (d, J = 6.20 Hz, 6H), 2.46 (s, 3H), 3.08 (s, 3H), 3.99 (s, 2H), 5.00–5.08 (m, 1H), 7.17 (d, J = 8.44 Hz, 1H), 7.39 (d, J = 8.44 Hz, 1H), 7.74 (s, 1H); EI—MS 294 [M+].
(ethyl acetate) to afford the title compound as a colorless solid [yield 81%, m.p. 403–404 K; Rf = 0.74 (ethyl acetate)]. Single crystals suitable for X-ray diffraction were prepared by evaporation of a solution of the title compound in ethyl acetate at room temperature. The average crystal size was approximately 1.0 x 1.0 x 0.5 mm. The crystals are colourless and soluble in polar solvents. Spectroscopic analysis: 1H NMR (CDCl3, 400 MHz)All the hydrogen atoms could have been distinguished in the difference electron density maps. However, all the H atoms were positioned geometrically and refined using a riding model, with C—H = 0.93 Å for the aryl, 0.97 Å for the methylene, 0.98 Å for the methine and 0.96 Å for the methyl H atoms. Uiso(H) = 1.2Ueq(C) for the aryl, methine and methylene H atoms, and Uiso(H) = 1.5Ueq(C) for the methyl H atoms.
Data collection: SMART (Bruker, 2001); cell
SAINT (Bruker, 2001); data reduction: SAINT (Bruker, 2001); 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, 1998); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).C15H18O4S | Z = 2 |
Mr = 294.35 | F(000) = 312 |
Triclinic, P1 | Dx = 1.327 Mg m−3 |
Hall symbol: -P_1 | Melting point = 403–404 K |
a = 8.1829 (5) Å | Mo Kα radiation, λ = 0.71073 Å |
b = 9.7027 (6) Å | Cell parameters from 4030 reflections |
c = 10.6545 (7) Å | θ = 2.4–28.2° |
α = 73.057 (1)° | µ = 0.23 mm−1 |
β = 77.463 (1)° | T = 298 K |
γ = 66.421 (1)° | Block, colourless |
V = 736.76 (8) Å3 | 0.40 × 0.30 × 0.30 mm |
Bruker SMART CCD diffractometer | 2479 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.035 |
Graphite monochromator | θmax = 26.0°, θmin = 2.7° |
Detector resolution: 10.0 pixels mm-1 | h = −10→10 |
ϕ and ω scans | k = −11→11 |
5802 measured reflections | l = −13→13 |
2838 independent 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)] = 0.036 | Hydrogen site location: difference Fourier map |
wR(F2) = 0.105 | H-atom parameters constrained |
S = 1.07 | w = 1/[σ2(Fo2) + (0.0509P)2 + 0.2101P] where P = (Fo2 + 2Fc2)/3 |
2838 reflections | (Δ/σ)max < 0.001 |
185 parameters | Δρmax = 0.22 e Å−3 |
0 restraints | Δρmin = −0.24 e Å−3 |
68 constraints |
C15H18O4S | γ = 66.421 (1)° |
Mr = 294.35 | V = 736.76 (8) Å3 |
Triclinic, P1 | Z = 2 |
a = 8.1829 (5) Å | Mo Kα radiation |
b = 9.7027 (6) Å | µ = 0.23 mm−1 |
c = 10.6545 (7) Å | T = 298 K |
α = 73.057 (1)° | 0.40 × 0.30 × 0.30 mm |
β = 77.463 (1)° |
Bruker SMART CCD diffractometer | 2479 reflections with I > 2σ(I) |
5802 measured reflections | Rint = 0.035 |
2838 independent reflections |
R[F2 > 2σ(F2)] = 0.036 | 0 restraints |
wR(F2) = 0.105 | H-atom parameters constrained |
S = 1.07 | Δρmax = 0.22 e Å−3 |
2838 reflections | Δρmin = −0.24 e Å−3 |
185 parameters |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'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 > 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 | ||
S | 0.74200 (6) | 0.64759 (5) | 0.04151 (4) | 0.04706 (16) | |
O1 | 0.84827 (15) | 0.47478 (12) | 0.40980 (11) | 0.0378 (3) | |
O2 | 0.7528 (2) | 0.53592 (18) | −0.03283 (14) | 0.0705 (4) | |
O3 | 0.73496 (17) | 0.88857 (15) | 0.23749 (16) | 0.0603 (4) | |
O4 | 1.00780 (15) | 0.88109 (12) | 0.25158 (12) | 0.0422 (3) | |
C1 | 0.7543 (2) | 0.55223 (18) | 0.20899 (15) | 0.0356 (3) | |
C2 | 0.6619 (2) | 0.45172 (16) | 0.29204 (15) | 0.0336 (3) | |
C3 | 0.5364 (2) | 0.39518 (18) | 0.27713 (16) | 0.0380 (4) | |
H3 | 0.4913 | 0.4233 | 0.1967 | 0.046* | |
C4 | 0.4806 (2) | 0.29641 (19) | 0.38454 (17) | 0.0405 (4) | |
C5 | 0.5499 (2) | 0.25528 (19) | 0.50517 (17) | 0.0424 (4) | |
H5 | 0.5109 | 0.1888 | 0.5761 | 0.051* | |
C6 | 0.6736 (2) | 0.30967 (18) | 0.52246 (16) | 0.0401 (4) | |
H6 | 0.7189 | 0.2818 | 0.6027 | 0.048* | |
C7 | 0.7260 (2) | 0.40767 (17) | 0.41396 (15) | 0.0343 (3) | |
C8 | 0.8622 (2) | 0.56095 (18) | 0.28352 (15) | 0.0361 (3) | |
C9 | 0.9868 (2) | 0.64659 (18) | 0.25585 (18) | 0.0405 (4) | |
H9A | 1.0607 | 0.6321 | 0.1728 | 0.049* | |
H9B | 1.0657 | 0.6029 | 0.3247 | 0.049* | |
C10 | 0.8915 (2) | 0.81825 (18) | 0.24831 (16) | 0.0384 (4) | |
C11 | 0.3469 (3) | 0.2312 (3) | 0.3719 (2) | 0.0598 (5) | |
H11A | 0.2959 | 0.2846 | 0.2902 | 0.090* | |
H11B | 0.2533 | 0.2443 | 0.4443 | 0.090* | |
H11C | 0.4066 | 0.1232 | 0.3731 | 0.090* | |
C12 | 0.5114 (3) | 0.7722 (3) | 0.0561 (2) | 0.0717 (6) | |
H12A | 0.4814 | 0.8392 | −0.0284 | 0.108* | |
H12B | 0.4926 | 0.8332 | 0.1182 | 0.108* | |
H12C | 0.4367 | 0.7112 | 0.0865 | 0.108* | |
C13 | 0.9392 (2) | 1.04906 (18) | 0.24297 (18) | 0.0426 (4) | |
H13 | 0.8239 | 1.0791 | 0.2982 | 0.051* | |
C14 | 0.9158 (3) | 1.1356 (2) | 0.1023 (2) | 0.0603 (5) | |
H14A | 0.8323 | 1.1104 | 0.0707 | 0.090* | |
H14B | 1.0294 | 1.1071 | 0.0488 | 0.090* | |
H14C | 0.8708 | 1.2446 | 0.0974 | 0.090* | |
C15 | 1.0762 (3) | 1.0762 (2) | 0.2963 (3) | 0.0692 (6) | |
H15A | 1.1907 | 1.0407 | 0.2453 | 0.104* | |
H15B | 1.0850 | 1.0206 | 0.3868 | 0.104* | |
H15C | 1.0407 | 1.1846 | 0.2910 | 0.104* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S | 0.0572 (3) | 0.0469 (3) | 0.0365 (2) | −0.0241 (2) | −0.00906 (19) | 0.00182 (17) |
O1 | 0.0416 (6) | 0.0381 (6) | 0.0392 (6) | −0.0204 (5) | −0.0113 (5) | −0.0035 (5) |
O2 | 0.0994 (12) | 0.0694 (9) | 0.0444 (8) | −0.0262 (9) | −0.0159 (8) | −0.0158 (7) |
O3 | 0.0408 (7) | 0.0449 (7) | 0.0966 (11) | −0.0190 (6) | −0.0103 (7) | −0.0113 (7) |
O4 | 0.0420 (6) | 0.0328 (6) | 0.0568 (7) | −0.0177 (5) | −0.0114 (5) | −0.0075 (5) |
C1 | 0.0406 (8) | 0.0324 (7) | 0.0355 (8) | −0.0163 (7) | −0.0064 (6) | −0.0040 (6) |
C2 | 0.0373 (8) | 0.0292 (7) | 0.0352 (8) | −0.0128 (6) | −0.0055 (6) | −0.0067 (6) |
C3 | 0.0411 (9) | 0.0370 (8) | 0.0415 (8) | −0.0167 (7) | −0.0096 (7) | −0.0098 (7) |
C4 | 0.0394 (9) | 0.0362 (8) | 0.0512 (10) | −0.0175 (7) | −0.0047 (7) | −0.0124 (7) |
C5 | 0.0458 (9) | 0.0356 (8) | 0.0454 (9) | −0.0205 (7) | −0.0016 (7) | −0.0031 (7) |
C6 | 0.0449 (9) | 0.0377 (8) | 0.0375 (8) | −0.0165 (7) | −0.0095 (7) | −0.0024 (6) |
C7 | 0.0357 (8) | 0.0304 (7) | 0.0394 (8) | −0.0140 (6) | −0.0076 (6) | −0.0063 (6) |
C8 | 0.0395 (8) | 0.0312 (7) | 0.0386 (8) | −0.0159 (6) | −0.0057 (6) | −0.0040 (6) |
C9 | 0.0396 (9) | 0.0376 (8) | 0.0490 (9) | −0.0200 (7) | −0.0070 (7) | −0.0068 (7) |
C10 | 0.0394 (9) | 0.0387 (8) | 0.0397 (8) | −0.0206 (7) | −0.0038 (7) | −0.0038 (6) |
C11 | 0.0605 (12) | 0.0615 (12) | 0.0731 (13) | −0.0393 (10) | −0.0128 (10) | −0.0095 (10) |
C12 | 0.0665 (14) | 0.0616 (13) | 0.0692 (14) | −0.0084 (11) | −0.0246 (11) | 0.0023 (11) |
C13 | 0.0444 (9) | 0.0327 (8) | 0.0540 (10) | −0.0160 (7) | −0.0051 (8) | −0.0119 (7) |
C14 | 0.0797 (15) | 0.0395 (10) | 0.0607 (12) | −0.0235 (10) | −0.0124 (10) | −0.0039 (8) |
C15 | 0.0745 (15) | 0.0483 (11) | 0.1006 (18) | −0.0231 (11) | −0.0311 (13) | −0.0232 (11) |
S—O2 | 1.4839 (15) | C8—C9 | 1.490 (2) |
S—C1 | 1.7583 (16) | C9—C10 | 1.516 (2) |
S—C12 | 1.790 (2) | C9—H9A | 0.9700 |
O1—C8 | 1.3698 (18) | C9—H9B | 0.9700 |
O1—C7 | 1.3830 (18) | C11—H11A | 0.9600 |
O3—C10 | 1.199 (2) | C11—H11B | 0.9600 |
O4—C10 | 1.3305 (19) | C11—H11C | 0.9600 |
O4—C13 | 1.4774 (19) | C12—H12A | 0.9600 |
C1—C8 | 1.349 (2) | C12—H12B | 0.9600 |
C1—C2 | 1.450 (2) | C12—H12C | 0.9600 |
C2—C7 | 1.392 (2) | C13—C15 | 1.500 (3) |
C2—C3 | 1.397 (2) | C13—C14 | 1.500 (3) |
C3—C4 | 1.386 (2) | C13—H13 | 0.9800 |
C3—H3 | 0.9300 | C14—H14A | 0.9600 |
C4—C5 | 1.403 (2) | C14—H14B | 0.9600 |
C4—C11 | 1.511 (2) | C14—H14C | 0.9600 |
C5—C6 | 1.379 (2) | C15—H15A | 0.9600 |
C5—H5 | 0.9300 | C15—H15B | 0.9600 |
C6—C7 | 1.376 (2) | C15—H15C | 0.9600 |
C6—H6 | 0.9300 | ||
O2—S—C1 | 108.11 (8) | H9A—C9—H9B | 107.7 |
O2—S—C12 | 106.21 (11) | O3—C10—O4 | 124.63 (15) |
C1—S—C12 | 97.74 (9) | O3—C10—C9 | 125.20 (14) |
C8—O1—C7 | 106.03 (11) | O4—C10—C9 | 110.14 (13) |
C10—O4—C13 | 117.80 (13) | C4—C11—H11A | 109.5 |
C8—C1—C2 | 107.31 (13) | C4—C11—H11B | 109.5 |
C8—C1—S | 123.03 (12) | H11A—C11—H11B | 109.5 |
C2—C1—S | 129.65 (12) | C4—C11—H11C | 109.5 |
C7—C2—C3 | 119.08 (14) | H11A—C11—H11C | 109.5 |
C7—C2—C1 | 104.42 (13) | H11B—C11—H11C | 109.5 |
C3—C2—C1 | 136.50 (15) | S—C12—H12A | 109.5 |
C4—C3—C2 | 118.66 (15) | S—C12—H12B | 109.5 |
C4—C3—H3 | 120.7 | H12A—C12—H12B | 109.5 |
C2—C3—H3 | 120.7 | S—C12—H12C | 109.5 |
C3—C4—C5 | 119.95 (15) | H12A—C12—H12C | 109.5 |
C3—C4—C11 | 120.26 (16) | H12B—C12—H12C | 109.5 |
C5—C4—C11 | 119.79 (16) | O4—C13—C15 | 105.45 (14) |
C6—C5—C4 | 122.50 (15) | O4—C13—C14 | 109.85 (14) |
C6—C5—H5 | 118.7 | C15—C13—C14 | 112.29 (17) |
C4—C5—H5 | 118.7 | O4—C13—H13 | 109.7 |
C7—C6—C5 | 116.08 (15) | C15—C13—H13 | 109.7 |
C7—C6—H6 | 122.0 | C14—C13—H13 | 109.7 |
C5—C6—H6 | 122.0 | C13—C14—H14A | 109.5 |
C6—C7—O1 | 125.47 (14) | C13—C14—H14B | 109.5 |
C6—C7—C2 | 123.73 (14) | H14A—C14—H14B | 109.5 |
O1—C7—C2 | 110.80 (13) | C13—C14—H14C | 109.5 |
C1—C8—O1 | 111.44 (13) | H14A—C14—H14C | 109.5 |
C1—C8—C9 | 132.89 (15) | H14B—C14—H14C | 109.5 |
O1—C8—C9 | 115.66 (13) | C13—C15—H15A | 109.5 |
C8—C9—C10 | 113.54 (14) | C13—C15—H15B | 109.5 |
C8—C9—H9A | 108.9 | H15A—C15—H15B | 109.5 |
C10—C9—H9A | 108.9 | C13—C15—H15C | 109.5 |
C8—C9—H9B | 108.9 | H15A—C15—H15C | 109.5 |
C10—C9—H9B | 108.9 | H15B—C15—H15C | 109.5 |
O2—S—C1—C8 | 133.07 (16) | C3—C2—C7—C6 | 0.4 (2) |
C12—S—C1—C8 | −117.00 (17) | C1—C2—C7—C6 | −179.35 (15) |
O2—S—C1—C2 | −45.61 (17) | C3—C2—C7—O1 | −179.98 (13) |
C12—S—C1—C2 | 64.32 (17) | C1—C2—C7—O1 | 0.30 (17) |
C8—C1—C2—C7 | 0.00 (18) | C2—C1—C8—O1 | −0.30 (19) |
S—C1—C2—C7 | 178.83 (13) | S—C1—C8—O1 | −179.23 (11) |
C8—C1—C2—C3 | −179.65 (18) | C2—C1—C8—C9 | −178.84 (17) |
S—C1—C2—C3 | −0.8 (3) | S—C1—C8—C9 | 2.2 (3) |
C7—C2—C3—C4 | −0.3 (2) | C7—O1—C8—C1 | 0.48 (18) |
C1—C2—C3—C4 | 179.36 (17) | C7—O1—C8—C9 | 179.29 (13) |
C2—C3—C4—C5 | 0.1 (2) | C1—C8—C9—C10 | 74.3 (2) |
C2—C3—C4—C11 | −179.20 (16) | O1—C8—C9—C10 | −104.20 (16) |
C3—C4—C5—C6 | 0.0 (3) | C13—O4—C10—O3 | 0.8 (2) |
C11—C4—C5—C6 | 179.31 (17) | C13—O4—C10—C9 | 179.02 (13) |
C4—C5—C6—C7 | 0.1 (3) | C8—C9—C10—O3 | −14.9 (2) |
C5—C6—C7—O1 | −179.86 (15) | C8—C9—C10—O4 | 166.85 (14) |
C5—C6—C7—C2 | −0.3 (2) | C10—O4—C13—C15 | 160.41 (17) |
C8—O1—C7—C6 | 179.16 (15) | C10—O4—C13—C14 | −78.39 (19) |
C8—O1—C7—C2 | −0.48 (17) |
D—H···A | D—H | H···A | D···A | D—H···A |
C9—H9A···O2i | 0.97 | 2.38 | 3.249 (2) | 149 |
C13—H13···Cg1ii | 0.98 | 2.91 | 3.656 (2) | 134 |
C15—H15C···Cg2ii | 0.96 | 2.96 | 3.837 (2) | 152 |
Symmetry codes: (i) −x+2, −y+1, −z; (ii) x, y+1, z. |
Experimental details
Crystal data | |
Chemical formula | C15H18O4S |
Mr | 294.35 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 298 |
a, b, c (Å) | 8.1829 (5), 9.7027 (6), 10.6545 (7) |
α, β, γ (°) | 73.057 (1), 77.463 (1), 66.421 (1) |
V (Å3) | 736.76 (8) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.23 |
Crystal size (mm) | 0.40 × 0.30 × 0.30 |
Data collection | |
Diffractometer | Bruker SMART CCD diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5802, 2838, 2479 |
Rint | 0.035 |
(sin θ/λ)max (Å−1) | 0.617 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.036, 0.105, 1.07 |
No. of reflections | 2838 |
No. of parameters | 185 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.22, −0.24 |
Computer programs: SMART (Bruker, 2001), SAINT (Bruker, 2001), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 1998).
D—H···A | D—H | H···A | D···A | D—H···A |
C9—H9A···O2i | 0.97 | 2.38 | 3.249 (2) | 149.4 |
C13—H13···Cg1ii | 0.98 | 2.91 | 3.656 (2) | 134 |
C15—H15C···Cg2ii | 0.96 | 2.96 | 3.837 (2) | 152 |
Symmetry codes: (i) −x+2, −y+1, −z; (ii) x, y+1, z. |
References
Brandenburg, K. (1998). DIAMOND. Crystal Impact GbR, Bonn, Germany. Google Scholar
Bruker (2001). SAINT and SMART. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Choi, H. D., Seo, P. J., Son, B. W. & Lee, U. (2007). Acta Cryst. E63, o3839. Web of Science CSD CrossRef IUCr Journals Google Scholar
Choi, H. D., Seo, P. J., Son, B. W. & Lee, U. (2008). Acta Cryst. E64, o1711. Web of Science CSD CrossRef IUCr Journals Google Scholar
Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565. CrossRef IUCr Journals Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
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This work is related to our previous communications on the synthesis and structure of 2-(5-methyl-3-methylsulfinyl-1-benzofuran-2-yl)acetic acid analogues, viz. ethyl 2-(5-methyl-3-methylsulfinyl-1-benzofuran-2-yl)acetate (Choi et al., 2007) and methyl 2-(5-methyl-3-methylsulfinyl-1-benzofuran-2-yl)acetate (Choi et al., 2008). Here we report the crystal structure of the title compound, isopropyl 2-(5-methyl-3-methylsulfinyl-1-benzofuran-2-yl)acetate (Fig. 1).
The benzofuran unit is essentially planar, with a mean deviation of 0.004 (1) Å from the least-squares plane defined by the nine constituent atoms. The molecular packing (Fig. 2) is stabilized by π—π electron interactions between the benzofuran rings of the adjacent molecules. The distances between the centroids of the stacked benzene rings are 3.713 (2) Å (symmetry code: 1-x, 1-y, 1-z). The crystal packing is further stabilized by C—H···π electron interactions (Tab. 1). Additionally, intermolecular C—H···O interactions are present in the structure (Tab. 1).