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Acta Cryst. (2013). E69, o998    [ doi:10.1107/S160053681301461X ]

3-(2-Fluorophenylsulfinyl)-2,4,6-trimethyl-1-benzofuran

H. D. Choi, P. J. Seo and U. Lee

Abstract top

In the title compound, C17H15FO2S, the 2-fluorophenyl ring makes a dihedral angle of 87.53 (5)° with the mean plane [r.m.s. deviation = 0.013 (1) Å] of the benzofuran fragment. In the crystal, molecules are linked by weak C-H...F, C-H...O and C-H...[pi] interactions, forming a three-dimensional network.

Comment top

As a part of our continuing study of 2,4,6-trimethyl-1-benzofuran derivatives containing 4-fluorophenylsulinyl (Choi et al., 2010) and 3-fluorophenylsulfinyl (Seo et al., 2011) substituents in 3-position, we report herein the crystal structure of the title compound.

In the title molecule (Fig. 1), the benzofuran unit is essentially planar, with a mean deviation of 0.013 (1) Å from the least-squares plane defined by the nine constituent atoms. The dihedral angle formed by the 2-fluorophenyl ring and the mean plane of the benzofuran fragment is 87.53 (5)°. In the crystal packing, molecules are connected by weak C—H···F and C—H···O hydrogen bonds (Fig. 2 & Table 1), and by C—H···π interactions (Fig. 3 & Table 1), forming a three-dimensional network.

Related literature top

For background information and the crystal structures of related compounds, see: Choi et al. (2010); Seo et al. (2011).

Experimental top

3-Chloroperoxybenzoic acid (77%, 291 mg, 1.3 mmol) was added in small portions to a stirred solution of 3-(2-fluorophenylsulfanyl)-2,4,6-trimethyl-1-benzofuran (343 mg, 1.2 mmol) in dichloromethane (30 mL) at 273 K. After being stirred at room temperature for 4h, 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 column chromatography (hexane–ethyl acetate, 4:1 v/v) to afford the title compound as a colorless solid [yield 72%, m.p. 423–424 K; Rf = 0.67 (hexane–ethyl acetate, 4:1 v/v)]. Single crystals suitable for X-ray diffraction were prepared by slow evaporation of a solution of the title compound in ethyl acetate at room temperature.

Refinement top

All H atoms were positioned geometrically and refined using a riding model, with C—H = 0.95 Å for aryl and 0.98Å 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.

Computing details top

Data collection: APEX2 (Bruker, 2009); cell refinement: 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, 2012) and DIAMOND (Brandenburg, 1998); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).

Figures top
[Figure 1] Fig. 1. The molecular structure of the title compound with the atom numbering scheme. Displacement ellipsoids are drawn at the 50% probability level. H atoms are presented as small spheres of arbitrary radius.
[Figure 2] Fig. 2. A view of the C—H···F and C—H···O interactions (dotted lines) in the crystal structure of the title compound. H atoms non-participating in hydrogen-bonding were omitted for clarity. [Symmetry codes: (i) x, - y + 1/2, z - 1/2; (ii) - x + 1, - y + 1, - z + 1; (iii) - x + 2, - y, - z + 1; (vi) x, - y + 1/2, z + 1/2.]
[Figure 3] Fig. 3. A view of the C—H···π interactions (dotted lines) in the crystal structure of the title compound. H atoms non-participating in hydrogen-bonding were omitted for clarity. [Symmetry codes: (iv) x, y - 1, z; (v) - x + 1, y + 1/2, - z + 3/2; (vii) x, y + 1, z; (viii) - x + 2, y - 1/2, - z + 3/2.]
3-(2-Fluorophenylsulfinyl)-2,4,6-trimethyl-1-benzofuran top
Crystal data top
C17H15FO2SF(000) = 632
Mr = 302.35Dx = 1.417 Mg m3
Monoclinic, P21/cMelting point = 423–424 K
Hall symbol: -P 2ybcMo Kα radiation, λ = 0.71073 Å
a = 13.6892 (5) ÅCell parameters from 3545 reflections
b = 6.0339 (2) Åθ = 2.4–27.5°
c = 17.1786 (7) ŵ = 0.24 mm1
β = 92.741 (2)°T = 173 K
V = 1417.32 (9) Å3Block, colourless
Z = 40.32 × 0.27 × 0.12 mm
Data collection top
Bruker SMART APEXII CCD
diffractometer
3277 independent reflections
Radiation source: rotating anode2665 reflections with I > 2σ(I)
Graphite multilayer monochromatorRint = 0.048
Detector resolution: 10.0 pixels mm-1θmax = 27.6°, θmin = 1.5°
φ and ω scansh = 1717
Absorption correction: multi-scan
(SADABS; Bruker, 2009)
k = 77
Tmin = 0.527, Tmax = 0.746l = 2216
13205 measured reflections
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.043Hydrogen site location: difference Fourier map
wR(F2) = 0.114H-atom parameters constrained
S = 1.07 w = 1/[σ2(Fo2) + (0.049P)2 + 0.6536P]
where P = (Fo2 + 2Fc2)/3
3277 reflections(Δ/σ)max = 0.001
193 parametersΔρmax = 0.36 e Å3
0 restraintsΔρmin = 0.43 e Å3
Crystal data top
C17H15FO2SV = 1417.32 (9) Å3
Mr = 302.35Z = 4
Monoclinic, P21/cMo Kα radiation
a = 13.6892 (5) ŵ = 0.24 mm1
b = 6.0339 (2) ÅT = 173 K
c = 17.1786 (7) Å0.32 × 0.27 × 0.12 mm
β = 92.741 (2)°
Data collection top
Bruker SMART APEXII CCD
diffractometer
3277 independent reflections
Absorption correction: multi-scan
(SADABS; Bruker, 2009)
2665 reflections with I > 2σ(I)
Tmin = 0.527, Tmax = 0.746Rint = 0.048
13205 measured reflectionsθmax = 27.6°
Refinement top
R[F2 > 2σ(F2)] = 0.043H-atom parameters constrained
wR(F2) = 0.114Δρmax = 0.36 e Å3
S = 1.07Δρmin = 0.43 e Å3
3277 reflectionsAbsolute structure: ?
193 parametersFlack parameter: ?
0 restraintsRogers parameter: ?
Special details top

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
S10.76961 (3)0.18134 (7)0.61409 (3)0.02772 (14)
F10.95958 (8)0.3216 (2)0.55355 (7)0.0387 (3)
O10.75116 (9)0.2075 (2)0.38753 (7)0.0263 (3)
O20.68255 (10)0.1904 (2)0.66215 (8)0.0380 (4)
C10.73907 (12)0.2512 (3)0.51663 (10)0.0236 (4)
C20.68389 (12)0.4305 (3)0.47829 (9)0.0205 (3)
C30.62608 (12)0.6111 (3)0.50021 (9)0.0215 (3)
C40.58790 (12)0.7440 (3)0.44025 (10)0.0235 (4)
H40.54960.86820.45380.028*
C50.60215 (12)0.7073 (3)0.36105 (10)0.0236 (4)
C60.65664 (12)0.5260 (3)0.33935 (10)0.0250 (4)
H60.66690.49380.28620.030*
C70.69534 (12)0.3945 (3)0.39892 (10)0.0219 (3)
C80.77602 (13)0.1244 (3)0.45981 (11)0.0256 (4)
C90.60497 (14)0.6599 (3)0.58346 (10)0.0292 (4)
H9A0.65800.74970.60730.044*
H9B0.59990.52040.61220.044*
H9C0.54320.74130.58520.044*
C100.55703 (14)0.8621 (3)0.30094 (11)0.0313 (4)
H10A0.57040.80810.24870.047*
H10B0.58511.01050.30830.047*
H10C0.48620.86870.30660.047*
C110.83800 (15)0.0766 (3)0.46046 (13)0.0355 (5)
H11A0.90240.03930.44150.053*
H11B0.80700.18950.42650.053*
H11C0.84570.13420.51370.053*
C120.84182 (13)0.4201 (3)0.64254 (10)0.0249 (4)
C130.93069 (13)0.4587 (3)0.61046 (10)0.0273 (4)
C140.99117 (14)0.6298 (3)0.63429 (11)0.0344 (4)
H141.05190.65320.61100.041*
C150.96141 (16)0.7673 (3)0.69317 (12)0.0375 (5)
H151.00160.88810.71020.045*
C160.87342 (16)0.7297 (4)0.72739 (11)0.0368 (5)
H160.85360.82410.76800.044*
C170.81432 (14)0.5551 (3)0.70271 (10)0.0313 (4)
H170.75470.52790.72710.038*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
S10.0300 (3)0.0266 (2)0.0265 (2)0.00358 (18)0.00096 (18)0.00813 (17)
F10.0313 (6)0.0457 (7)0.0401 (7)0.0008 (5)0.0103 (5)0.0076 (5)
O10.0266 (6)0.0262 (6)0.0264 (6)0.0024 (5)0.0039 (5)0.0054 (5)
O20.0360 (8)0.0495 (9)0.0292 (7)0.0118 (7)0.0083 (6)0.0102 (6)
C10.0242 (9)0.0221 (8)0.0244 (8)0.0027 (7)0.0015 (7)0.0010 (7)
C20.0209 (8)0.0209 (8)0.0199 (8)0.0026 (6)0.0015 (6)0.0001 (6)
C30.0213 (8)0.0242 (8)0.0193 (8)0.0022 (7)0.0037 (6)0.0018 (6)
C40.0223 (8)0.0242 (8)0.0245 (9)0.0023 (7)0.0041 (7)0.0009 (7)
C50.0217 (8)0.0287 (9)0.0205 (8)0.0022 (7)0.0017 (7)0.0016 (7)
C60.0241 (9)0.0328 (9)0.0183 (8)0.0036 (7)0.0033 (7)0.0020 (7)
C70.0206 (8)0.0227 (8)0.0228 (8)0.0021 (7)0.0047 (7)0.0048 (7)
C80.0232 (9)0.0234 (8)0.0302 (9)0.0032 (7)0.0016 (7)0.0015 (7)
C90.0362 (10)0.0315 (9)0.0202 (8)0.0035 (8)0.0054 (7)0.0036 (7)
C100.0304 (10)0.0378 (10)0.0258 (9)0.0015 (8)0.0007 (8)0.0055 (8)
C110.0341 (10)0.0246 (9)0.0483 (12)0.0036 (8)0.0062 (9)0.0013 (8)
C120.0245 (9)0.0288 (9)0.0213 (8)0.0003 (7)0.0012 (7)0.0062 (7)
C130.0262 (9)0.0321 (9)0.0238 (8)0.0027 (7)0.0015 (7)0.0033 (7)
C140.0280 (10)0.0411 (11)0.0338 (10)0.0068 (8)0.0003 (8)0.0078 (9)
C150.0418 (12)0.0335 (10)0.0361 (11)0.0062 (9)0.0083 (9)0.0023 (8)
C160.0418 (12)0.0397 (11)0.0282 (10)0.0054 (9)0.0051 (9)0.0039 (8)
C170.0292 (10)0.0410 (11)0.0237 (9)0.0037 (8)0.0010 (7)0.0025 (8)
Geometric parameters (Å, º) top
S1—O21.4830 (15)C9—H9A0.9800
S1—C11.7575 (18)C9—H9B0.9800
S1—C121.8014 (19)C9—H9C0.9800
F1—C131.354 (2)C10—H10A0.9800
O1—C81.367 (2)C10—H10B0.9800
O1—C71.382 (2)C10—H10C0.9800
C1—C81.357 (3)C11—H11A0.9800
C1—C21.458 (2)C11—H11B0.9800
C2—C71.397 (2)C11—H11C0.9800
C2—C31.409 (2)C12—C131.379 (2)
C3—C41.388 (2)C12—C171.382 (3)
C3—C91.502 (2)C13—C141.373 (3)
C4—C51.401 (2)C14—C151.385 (3)
C4—H40.9500C14—H140.9500
C5—C61.385 (2)C15—C161.384 (3)
C5—C101.503 (2)C15—H150.9500
C6—C71.380 (2)C16—C171.382 (3)
C6—H60.9500C16—H160.9500
C8—C111.480 (2)C17—H170.9500
O2—S1—C1111.13 (8)H9A—C9—H9C109.5
O2—S1—C12105.34 (9)H9B—C9—H9C109.5
C1—S1—C1299.73 (8)C5—C10—H10A109.5
C8—O1—C7106.64 (13)C5—C10—H10B109.5
C8—C1—C2107.23 (15)H10A—C10—H10B109.5
C8—C1—S1118.03 (14)C5—C10—H10C109.5
C2—C1—S1134.65 (13)H10A—C10—H10C109.5
C7—C2—C3118.16 (15)H10B—C10—H10C109.5
C7—C2—C1104.22 (14)C8—C11—H11A109.5
C3—C2—C1137.61 (15)C8—C11—H11B109.5
C4—C3—C2116.43 (15)H11A—C11—H11B109.5
C4—C3—C9120.71 (16)C8—C11—H11C109.5
C2—C3—C9122.85 (15)H11A—C11—H11C109.5
C3—C4—C5124.36 (16)H11B—C11—H11C109.5
C3—C4—H4117.8C13—C12—C17118.43 (17)
C5—C4—H4117.8C13—C12—S1120.65 (14)
C6—C5—C4119.20 (16)C17—C12—S1120.58 (14)
C6—C5—C10120.98 (16)F1—C13—C14118.80 (17)
C4—C5—C10119.81 (16)F1—C13—C12118.61 (16)
C7—C6—C5116.55 (15)C14—C13—C12122.59 (18)
C7—C6—H6121.7C13—C14—C15118.30 (18)
C5—C6—H6121.7C13—C14—H14120.9
C6—C7—O1124.03 (15)C15—C14—H14120.9
C6—C7—C2125.26 (16)C16—C15—C14120.28 (19)
O1—C7—C2110.71 (15)C16—C15—H15119.9
C1—C8—O1111.18 (15)C14—C15—H15119.9
C1—C8—C11133.64 (18)C17—C16—C15120.22 (19)
O1—C8—C11115.16 (16)C17—C16—H16119.9
C3—C9—H9A109.5C15—C16—H16119.9
C3—C9—H9B109.5C12—C17—C16120.14 (18)
H9A—C9—H9B109.5C12—C17—H17119.9
C3—C9—H9C109.5C16—C17—H17119.9
O2—S1—C1—C8135.67 (14)C3—C2—C7—O1178.00 (14)
C12—S1—C1—C8113.59 (15)C1—C2—C7—O10.98 (18)
O2—S1—C1—C248.2 (2)C2—C1—C8—O11.1 (2)
C12—S1—C1—C262.50 (19)S1—C1—C8—O1176.04 (11)
C8—C1—C2—C71.21 (18)C2—C1—C8—C11179.30 (19)
S1—C1—C2—C7175.18 (15)S1—C1—C8—C112.2 (3)
C8—C1—C2—C3177.45 (19)C7—O1—C8—C10.45 (19)
S1—C1—C2—C36.2 (3)C7—O1—C8—C11179.04 (15)
C7—C2—C3—C42.3 (2)O2—S1—C12—C13177.90 (14)
C1—C2—C3—C4179.19 (19)C1—S1—C12—C1366.86 (15)
C7—C2—C3—C9177.20 (16)O2—S1—C12—C174.74 (17)
C1—C2—C3—C91.3 (3)C1—S1—C12—C17119.98 (15)
C2—C3—C4—C51.0 (3)C17—C12—C13—F1177.51 (15)
C9—C3—C4—C5178.50 (17)S1—C12—C13—F14.2 (2)
C3—C4—C5—C60.8 (3)C17—C12—C13—C142.1 (3)
C3—C4—C5—C10179.86 (17)S1—C12—C13—C14175.40 (14)
C4—C5—C6—C71.3 (2)F1—C13—C14—C15179.24 (17)
C10—C5—C6—C7179.72 (16)C12—C13—C14—C150.4 (3)
C5—C6—C7—O1179.85 (15)C13—C14—C15—C160.9 (3)
C5—C6—C7—C20.1 (3)C14—C15—C16—C170.4 (3)
C8—O1—C7—C6179.66 (16)C13—C12—C17—C162.6 (3)
C8—O1—C7—C20.38 (18)S1—C12—C17—C16175.89 (14)
C3—C2—C7—C62.0 (3)C15—C16—C17—C121.4 (3)
C1—C2—C7—C6179.06 (16)
Hydrogen-bond geometry (Å, º) top
Cg1 and Cg2 are the centroids of the C2–C7 benzene ring and the C12–C17 2-fluorophenyl ring, respectively.
D—H···AD—HH···AD···AD—H···A
C6—H6···O2i0.952.423.347 (2)164
C10—H10C···O2ii0.982.423.385 (2)167
C11—H11A···F1iii0.982.543.160 (2)121
C11—H11B···Cg1iv0.982.693.476 (2)138
C15—H15···Cg2v0.952.713.548 (2)147
Symmetry codes: (i) x, y+1/2, z1/2; (ii) x+1, y+1, z+1; (iii) x+2, y, z+1; (iv) x, y1, z; (v) x+2, y+1/2, z+3/2.
Hydrogen-bond geometry (Å, º) top
Cg1 and Cg2 are the centroids of the C2–C7 benzene ring and the C12–C17 2-fluorophenyl ring, respectively.
D—H···AD—HH···AD···AD—H···A
C6—H6···O2i0.952.423.347 (2)164.2
C10—H10C···O2ii0.982.423.385 (2)167.0
C11—H11A···F1iii0.982.543.160 (2)120.9
C11—H11B···Cg1iv0.982.693.476 (2)137.9
C15—H15···Cg2v0.952.713.548 (2)147.1
Symmetry codes: (i) x, y+1/2, z1/2; (ii) x+1, y+1, z+1; (iii) x+2, y, z+1; (iv) x, y1, z; (v) x+2, y+1/2, z+3/2.
Acknowledgements top

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
References top

Brandenburg, K. (1998). DIAMOND. Crystal Impact GbR, Bonn, Germany.

Bruker (2009). APEX2, SADABS and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.

Choi, H. D., Seo, P. J., Son, B. W. & Lee, U. (2010). Acta Cryst. E66, o586.

Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849–854.

Seo, P. J., Choi, H. D., Son, B. W. & Lee, U. (2011). Acta Cryst. E67, o3113.

Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122.