organic compounds
5-Bromo-3-(3-fluorophenylsulfinyl)-2-methyl-1-benzofuran
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
In the title compound, C15H10BrFO2S, the 3-fluorophenyl ring makes a dihedral angle of 85.0 (1)° with the mean plane [r.m.s. deviation = 0.008 (2) Å] of the benzofuran fragment. In the crystal, molecules are linked by weak C—H⋯O hydrogen bonds and a Br⋯O contact [3.200 (3) Å]. The also exhibits slipped π–π interactions between the benzene and furan rings of neighbouring molecules [centroid–centroid distance = 3.619 (4) Å and slippage of 1.389 (4) Å]. In the 3-fluorophenyl ring, the F atom is disordered over two positions with site-occupancy factors of 0.583 (5) and 0.417 (5).
Related literature
For background information and the crystal structures of related compounds, see: Choi et al. (2010a,b, 2012). For a review of halogen bonding, see: Politzer et al. (2007).
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: 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
https://doi.org/10.1107/S1600536812032394/kp2435sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536812032394/kp2435Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536812032394/kp2435Isup3.cml
3-Chloroperoxybenzoic acid (77%, 224 mg, 1.0 mmol) was added in small portions to a stirred solution of 5-bromo-3-(3-fluorophenylsulfanyl)-2-methyl-1-benzofurann (303 mg, 0.9 mmol) in dichloromethane (30 mL) at 273 K. After being stirred at room temperature for 4 h, the mixture was washed with saturated sodium bicarbonate solution and the organic layer was separated, dried over magnesium sulfate, filtered and concentrated at reduced pressure. The residue was purified by
(hexane–ethyl acetate, 2:1 v/v) to afford the title compound as a colourless solid [yield 74%, m.p. 393–394 K; Rf = 0.58 (hexane–ethyl acetate, 2:1 v/v)]. Single crystals suitable for X-ray diffraction were prepared by slow evaporation of a solution of the title compound in acetone at room temperature.All H atoms were positioned geometrically and refined using a riding model, with C—H = 0.95 Å for aryl and 0.98 Å for methyl H atoms. Uiso(H) = 1.2Ueq(C) for aryl and 1.5Ueq(C) for methyl H atoms. The positions of methyl hydrogens were optimized rotationally. The F1 atom of the 3-fluorophenyl ring is disordered over two positions with site occupancy factors, from
of 0.583 (5) (part A) and 0.417 (5) (part B). The distance of equivalent C-F pairs were restrained to 1.330 (5) Å using the SHELXL-97 command DFIX, and displacement ellipsoids of F1 set were restrained using the SHELXL-97 command ISOR.As a part of our ongoing study of 5-bromo-2-methyl-1-benzofuran derivatives containing 3-(4-fluorophenylsulfinyl) (Choi et al., 2010a), 3-(4-chlorophenylsulfinyl) (Choi et al., 2010b), and 3-(4-methylphenylsulfinyl) (Choi et al., 2012) substituents, we report herein the
of the title compound.In the title molecule (Fig. 1), the benzofuran unit is planar with a mean deviation of 0.008 (2) Å from the least-squares plane defined by the nine constituent atoms. In the 3-fluorophenyl ring, the F atom is disordered over two positions with site-occupancy factors, from ═O unit [Br···O2i = 3.200 (3) Å, C4—BrI···O2i = 159.51 (11)°] (Politzer et al., 2007). The crystal packing (Fig. 3) also exhibits slipped π–π interactions between the benzene and furan rings of neighbouring molecules, with a Cg1···Cg2iv distance of 3.619 (4) Å and an interplanar distance of 3.342 (4) Å resulting in a slippage of 1.389 (4) Å (Cg1 and Cg2 are the centroids of the C2-C7 benzene ring and the C1/C2/C7/O1/C8 furan ring, respectively).
of 0.583 (5)(part A) and 0.417 (5)(part B). The dihedral angle between the 3-fluorophenyl ring and the mean plane of the benzofuran ring is 85.0 (1)°. In the (Fig. 2), molecules are connected by weak C–H···O hydrogen bonds (Table 1), and a Br···O interaction between the bromine and the oxygen of the SFor background information and the crystal structures of related compounds, see: Choi et al. (2010a,b, 2012). For a review of halogen bonding, see: Politzer et al. (2007).
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 (Farrugia, 1997) and DIAMOND (Brandenburg, 1998); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).C15H10BrFO2S | F(000) = 704 |
Mr = 353.20 | Dx = 1.681 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 3368 reflections |
a = 13.0488 (4) Å | θ = 2.4–26.5° |
b = 11.1874 (3) Å | µ = 3.10 mm−1 |
c = 9.9295 (3) Å | T = 173 K |
β = 105.709 (2)° | Block, colourless |
V = 1395.39 (7) Å3 | 0.25 × 0.24 × 0.13 mm |
Z = 4 |
Bruker SMART APEXII CCD diffractometer | 3460 independent reflections |
Radiation source: rotating anode | 2392 reflections with I > 2σ(I) |
Graphite multilayer monochromator | Rint = 0.048 |
Detector resolution: 10.0 pixels mm-1 | θmax = 28.3°, θmin = 1.6° |
φ and ω scans | h = −17→17 |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | k = −13→14 |
Tmin = 0.494, Tmax = 0.746 | l = −13→12 |
13225 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)] = 0.043 | Hydrogen site location: difference Fourier map |
wR(F2) = 0.115 | H-atom parameters constrained |
S = 1.02 | w = 1/[σ2(Fo2) + (0.0477P)2 + 0.9756P] where P = (Fo2 + 2Fc2)/3 |
3460 reflections | (Δ/σ)max < 0.001 |
192 parameters | Δρmax = 0.61 e Å−3 |
14 restraints | Δρmin = −1.10 e Å−3 |
C15H10BrFO2S | V = 1395.39 (7) Å3 |
Mr = 353.20 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 13.0488 (4) Å | µ = 3.10 mm−1 |
b = 11.1874 (3) Å | T = 173 K |
c = 9.9295 (3) Å | 0.25 × 0.24 × 0.13 mm |
β = 105.709 (2)° |
Bruker SMART APEXII CCD diffractometer | 3460 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 2392 reflections with I > 2σ(I) |
Tmin = 0.494, Tmax = 0.746 | Rint = 0.048 |
13225 measured reflections |
R[F2 > 2σ(F2)] = 0.043 | 14 restraints |
wR(F2) = 0.115 | H-atom parameters constrained |
S = 1.02 | Δρmax = 0.61 e Å−3 |
3460 reflections | Δρmin = −1.10 e Å−3 |
192 parameters |
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 | Occ. (<1) | |
Br1 | 0.78842 (3) | 0.16727 (3) | 0.52938 (5) | 0.06445 (17) | |
S1 | 0.70738 (6) | 0.67272 (7) | 0.23040 (7) | 0.03887 (19) | |
O1 | 0.93643 (16) | 0.67342 (18) | 0.5796 (2) | 0.0384 (5) | |
O2 | 0.7178 (2) | 0.5873 (2) | 0.1208 (2) | 0.0595 (7) | |
C1 | 0.8025 (2) | 0.6387 (3) | 0.3879 (3) | 0.0333 (6) | |
C2 | 0.8265 (2) | 0.5272 (3) | 0.4624 (3) | 0.0326 (6) | |
C3 | 0.7894 (2) | 0.4090 (3) | 0.4423 (3) | 0.0385 (7) | |
H3 | 0.7343 | 0.3862 | 0.3625 | 0.046* | |
C4 | 0.8371 (3) | 0.3279 (3) | 0.5442 (4) | 0.0426 (7) | |
C5 | 0.9200 (3) | 0.3574 (3) | 0.6612 (3) | 0.0445 (8) | |
H5 | 0.9500 | 0.2978 | 0.7285 | 0.053* | |
C6 | 0.9583 (2) | 0.4726 (3) | 0.6796 (3) | 0.0411 (7) | |
H6 | 1.0153 | 0.4945 | 0.7578 | 0.049* | |
C7 | 0.9100 (2) | 0.5543 (3) | 0.5793 (3) | 0.0345 (6) | |
C8 | 0.8706 (2) | 0.7221 (3) | 0.4607 (3) | 0.0352 (6) | |
C9 | 0.8858 (3) | 0.8504 (3) | 0.4392 (4) | 0.0463 (8) | |
H9A | 0.8629 | 0.8968 | 0.5096 | 0.069* | |
H9B | 0.8435 | 0.8738 | 0.3456 | 0.069* | |
H9C | 0.9613 | 0.8662 | 0.4482 | 0.069* | |
C10 | 0.5915 (2) | 0.6284 (3) | 0.2817 (3) | 0.0387 (7) | |
C11 | 0.5255 (3) | 0.5431 (3) | 0.2057 (4) | 0.0532 (9) | |
H11 | 0.5429 | 0.5013 | 0.1317 | 0.064* | |
C12 | 0.4339 (3) | 0.5211 (4) | 0.2412 (6) | 0.0788 (15) | 0.583 (5) |
H12 | 0.3870 | 0.4631 | 0.1877 | 0.095* | 0.583 (5) |
C12' | 0.4339 (3) | 0.5211 (4) | 0.2412 (6) | 0.0788 (15) | 0.42 |
F1' | 0.3631 (4) | 0.4412 (5) | 0.1945 (7) | 0.083 (2) | 0.417 (5) |
C13 | 0.4043 (3) | 0.5740 (6) | 0.3450 (6) | 0.0877 (17) | |
H13 | 0.3394 | 0.5553 | 0.3661 | 0.105* | |
C14 | 0.4731 (3) | 0.6561 (5) | 0.4180 (4) | 0.0805 (17) | 0.583 (5) |
F1 | 0.4478 (3) | 0.6915 (4) | 0.5278 (4) | 0.0791 (15) | 0.583 (5) |
C14' | 0.4731 (3) | 0.6561 (5) | 0.4180 (4) | 0.0805 (17) | 0.42 |
H14' | 0.4556 | 0.6940 | 0.4944 | 0.097* | 0.417 (5) |
C15 | 0.5663 (3) | 0.6885 (4) | 0.3896 (3) | 0.0542 (10) | |
H15 | 0.6111 | 0.7490 | 0.4414 | 0.065* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Br1 | 0.0542 (2) | 0.0364 (2) | 0.0981 (4) | 0.00465 (16) | 0.0128 (2) | 0.00779 (18) |
S1 | 0.0434 (4) | 0.0439 (4) | 0.0301 (4) | 0.0032 (3) | 0.0112 (3) | 0.0067 (3) |
O1 | 0.0351 (10) | 0.0423 (12) | 0.0376 (11) | −0.0004 (9) | 0.0096 (8) | −0.0034 (9) |
O2 | 0.0720 (16) | 0.0729 (18) | 0.0372 (12) | 0.0076 (14) | 0.0210 (11) | −0.0055 (11) |
C1 | 0.0307 (13) | 0.0405 (16) | 0.0317 (14) | 0.0033 (12) | 0.0134 (11) | 0.0013 (12) |
C2 | 0.0280 (12) | 0.0398 (16) | 0.0324 (14) | 0.0050 (12) | 0.0125 (11) | 0.0011 (12) |
C3 | 0.0323 (13) | 0.0404 (17) | 0.0427 (16) | 0.0037 (13) | 0.0099 (12) | −0.0013 (13) |
C4 | 0.0384 (15) | 0.0360 (17) | 0.0557 (19) | 0.0062 (13) | 0.0163 (14) | 0.0028 (14) |
C5 | 0.0433 (17) | 0.0472 (19) | 0.0441 (17) | 0.0180 (14) | 0.0139 (14) | 0.0079 (14) |
C6 | 0.0365 (15) | 0.050 (2) | 0.0343 (15) | 0.0097 (14) | 0.0059 (12) | −0.0037 (13) |
C7 | 0.0313 (13) | 0.0379 (16) | 0.0361 (15) | 0.0031 (12) | 0.0123 (11) | −0.0020 (12) |
C8 | 0.0339 (14) | 0.0410 (17) | 0.0353 (15) | 0.0030 (13) | 0.0170 (12) | 0.0021 (13) |
C9 | 0.0479 (18) | 0.0395 (18) | 0.055 (2) | −0.0038 (14) | 0.0197 (15) | 0.0019 (15) |
C10 | 0.0347 (14) | 0.0477 (18) | 0.0300 (14) | 0.0053 (13) | 0.0025 (11) | 0.0084 (13) |
C11 | 0.0481 (18) | 0.051 (2) | 0.055 (2) | 0.0010 (16) | 0.0041 (16) | 0.0024 (16) |
C12 | 0.044 (2) | 0.083 (3) | 0.101 (4) | −0.009 (2) | 0.006 (2) | 0.025 (3) |
C12' | 0.044 (2) | 0.083 (3) | 0.101 (4) | −0.009 (2) | 0.006 (2) | 0.025 (3) |
F1' | 0.068 (3) | 0.070 (4) | 0.101 (4) | −0.032 (3) | 0.007 (3) | −0.012 (3) |
C13 | 0.0324 (18) | 0.139 (5) | 0.090 (3) | −0.001 (2) | 0.014 (2) | 0.040 (3) |
C14 | 0.042 (2) | 0.151 (5) | 0.050 (2) | 0.012 (3) | 0.0150 (17) | 0.012 (3) |
F1 | 0.057 (2) | 0.120 (4) | 0.069 (3) | 0.005 (2) | 0.0304 (19) | −0.028 (2) |
C14' | 0.042 (2) | 0.151 (5) | 0.050 (2) | 0.012 (3) | 0.0150 (17) | 0.012 (3) |
C15 | 0.0370 (16) | 0.086 (3) | 0.0367 (17) | 0.0038 (17) | 0.0056 (13) | −0.0030 (17) |
Br1—C4 | 1.898 (3) | C6—H6 | 0.9500 |
Br1—O2i | 3.200 (3) | C8—C9 | 1.472 (4) |
S1—O2 | 1.482 (3) | C9—H9A | 0.9800 |
S1—C1 | 1.755 (3) | C9—H9B | 0.9800 |
S1—C10 | 1.792 (3) | C9—H9C | 0.9800 |
O1—C8 | 1.371 (3) | C10—C11 | 1.367 (5) |
O1—C7 | 1.377 (4) | C10—C15 | 1.378 (5) |
C1—C8 | 1.355 (4) | C11—C12 | 1.357 (6) |
C1—C2 | 1.441 (4) | C11—H11 | 0.9500 |
C2—C7 | 1.393 (4) | C12—C13 | 1.333 (7) |
C2—C3 | 1.404 (4) | C12—H12 | 0.9500 |
C3—C4 | 1.376 (4) | C13—C14 | 1.349 (7) |
C3—H3 | 0.9500 | C13—H13 | 0.9500 |
C4—C5 | 1.396 (5) | C14—F1 | 1.284 (4) |
C5—C6 | 1.377 (5) | C14—C15 | 1.370 (5) |
C5—H5 | 0.9500 | C15—H15 | 0.9500 |
C6—C7 | 1.373 (4) | ||
C4—Br1—O2i | 159.51 (11) | C1—C8—C9 | 133.6 (3) |
O2—S1—C1 | 109.35 (14) | O1—C8—C9 | 115.8 (3) |
O2—S1—C10 | 106.41 (16) | C8—C9—H9A | 109.5 |
C1—S1—C10 | 97.72 (13) | C8—C9—H9B | 109.5 |
C8—O1—C7 | 106.5 (2) | H9A—C9—H9B | 109.5 |
C8—C1—C2 | 107.6 (2) | C8—C9—H9C | 109.5 |
C8—C1—S1 | 122.0 (2) | H9A—C9—H9C | 109.5 |
C2—C1—S1 | 130.4 (2) | H9B—C9—H9C | 109.5 |
C7—C2—C3 | 119.0 (3) | C11—C10—C15 | 121.5 (3) |
C7—C2—C1 | 104.6 (3) | C11—C10—S1 | 119.4 (3) |
C3—C2—C1 | 136.4 (3) | C15—C10—S1 | 118.9 (3) |
C4—C3—C2 | 116.6 (3) | C12—C11—C10 | 116.8 (4) |
C4—C3—H3 | 121.7 | C12—C11—H11 | 121.6 |
C2—C3—H3 | 121.7 | C10—C11—H11 | 121.6 |
C3—C4—C5 | 123.4 (3) | C13—C12—C11 | 125.4 (4) |
C3—C4—Br1 | 119.5 (2) | C13—C12—H12 | 117.3 |
C5—C4—Br1 | 117.1 (2) | C11—C12—H12 | 117.3 |
C6—C5—C4 | 120.2 (3) | C12—C13—C14 | 115.3 (4) |
C6—C5—H5 | 119.9 | C12—C13—H13 | 122.3 |
C4—C5—H5 | 119.9 | C14—C13—H13 | 122.3 |
C7—C6—C5 | 116.6 (3) | F1—C14—C13 | 112.3 (4) |
C7—C6—H6 | 121.7 | F1—C14—C15 | 122.6 (4) |
C5—C6—H6 | 121.7 | C13—C14—C15 | 124.6 (4) |
C6—C7—O1 | 125.2 (3) | C14—C15—C10 | 116.3 (4) |
C6—C7—C2 | 124.2 (3) | C14—C15—H15 | 121.8 |
O1—C7—C2 | 110.6 (2) | C10—C15—H15 | 121.8 |
C1—C8—O1 | 110.7 (3) | ||
O2—S1—C1—C8 | 127.1 (2) | C3—C2—C7—O1 | 178.8 (2) |
C10—S1—C1—C8 | −122.4 (3) | C1—C2—C7—O1 | 0.4 (3) |
O2—S1—C1—C2 | −51.6 (3) | C2—C1—C8—O1 | −1.2 (3) |
C10—S1—C1—C2 | 58.9 (3) | S1—C1—C8—O1 | 179.78 (19) |
C8—C1—C2—C7 | 0.5 (3) | C2—C1—C8—C9 | −179.9 (3) |
S1—C1—C2—C7 | 179.4 (2) | S1—C1—C8—C9 | 1.2 (5) |
C8—C1—C2—C3 | −177.5 (3) | C7—O1—C8—C1 | 1.4 (3) |
S1—C1—C2—C3 | 1.3 (5) | C7—O1—C8—C9 | −179.7 (3) |
C7—C2—C3—C4 | 2.1 (4) | O2—S1—C10—C11 | −9.5 (3) |
C1—C2—C3—C4 | 179.9 (3) | C1—S1—C10—C11 | −122.3 (3) |
C2—C3—C4—C5 | −1.5 (5) | O2—S1—C10—C15 | 176.0 (3) |
C2—C3—C4—Br1 | 177.6 (2) | C1—S1—C10—C15 | 63.1 (3) |
O2i—Br1—C4—C3 | −138.1 (3) | C15—C10—C11—C12 | 0.4 (5) |
O2i—Br1—C4—C5 | 41.0 (5) | S1—C10—C11—C12 | −174.0 (3) |
C3—C4—C5—C6 | 0.0 (5) | C10—C11—C12—C13 | −1.3 (7) |
Br1—C4—C5—C6 | −179.1 (2) | C11—C12—C13—C14 | 0.3 (7) |
C4—C5—C6—C7 | 0.9 (5) | C12—C13—C14—F1 | −170.9 (5) |
C5—C6—C7—O1 | 179.6 (3) | C12—C13—C14—C15 | 1.7 (7) |
C5—C6—C7—C2 | −0.3 (5) | F1—C14—C15—C10 | 169.4 (4) |
C8—O1—C7—C6 | 179.0 (3) | C13—C14—C15—C10 | −2.5 (7) |
C8—O1—C7—C2 | −1.1 (3) | C11—C10—C15—C14 | 1.4 (5) |
C3—C2—C7—C6 | −1.3 (4) | S1—C10—C15—C14 | 175.8 (3) |
C1—C2—C7—C6 | −179.7 (3) |
Symmetry code: (i) x, −y+1/2, z+1/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
C5—H5···O1ii | 0.95 | 2.50 | 3.429 (4) | 167 |
C9—H9A···O2iii | 0.98 | 2.44 | 3.269 (4) | 142 |
Symmetry codes: (ii) −x+2, y−1/2, −z+3/2; (iii) x, −y+3/2, z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C15H10BrFO2S |
Mr | 353.20 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 173 |
a, b, c (Å) | 13.0488 (4), 11.1874 (3), 9.9295 (3) |
β (°) | 105.709 (2) |
V (Å3) | 1395.39 (7) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 3.10 |
Crystal size (mm) | 0.25 × 0.24 × 0.13 |
Data collection | |
Diffractometer | Bruker SMART APEXII CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.494, 0.746 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 13225, 3460, 2392 |
Rint | 0.048 |
(sin θ/λ)max (Å−1) | 0.668 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.043, 0.115, 1.02 |
No. of reflections | 3460 |
No. of parameters | 192 |
No. of restraints | 14 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.61, −1.10 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), 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 |
C5—H5···O1i | 0.95 | 2.50 | 3.429 (4) | 167.0 |
C9—H9A···O2ii | 0.98 | 2.44 | 3.269 (4) | 141.7 |
Symmetry codes: (i) −x+2, y−1/2, −z+3/2; (ii) x, −y+3/2, z+1/2. |
Acknowledgements
This work was supported by the Blue-Bio Industry Regional Innovation Center (RIC08-06-07) at Dongeui University as an RIC program under the Ministry of Knowledge Economy and Busan city.
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.
As a part of our ongoing study of 5-bromo-2-methyl-1-benzofuran derivatives containing 3-(4-fluorophenylsulfinyl) (Choi et al., 2010a), 3-(4-chlorophenylsulfinyl) (Choi et al., 2010b), and 3-(4-methylphenylsulfinyl) (Choi et al., 2012) substituents, we report herein the crystal structure of the title compound.
In the title molecule (Fig. 1), the benzofuran unit is planar with a mean deviation of 0.008 (2) Å from the least-squares plane defined by the nine constituent atoms. In the 3-fluorophenyl ring, the F atom is disordered over two positions with site-occupancy factors, from refinement of 0.583 (5)(part A) and 0.417 (5)(part B). The dihedral angle between the 3-fluorophenyl ring and the mean plane of the benzofuran ring is 85.0 (1)°. In the crystal structure (Fig. 2), molecules are connected by weak C–H···O hydrogen bonds (Table 1), and a Br···O interaction between the bromine and the oxygen of the S═O unit [Br···O2i = 3.200 (3) Å, C4—BrI···O2i = 159.51 (11)°] (Politzer et al., 2007). The crystal packing (Fig. 3) also exhibits slipped π–π interactions between the benzene and furan rings of neighbouring molecules, with a Cg1···Cg2iv distance of 3.619 (4) Å and an interplanar distance of 3.342 (4) Å resulting in a slippage of 1.389 (4) Å (Cg1 and Cg2 are the centroids of the C2-C7 benzene ring and the C1/C2/C7/O1/C8 furan ring, respectively).