organic compounds\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

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COMMUNICATIONS
ISSN: 2056-9890

5-Bromo-2,4,6-tri­methyl-3-(3-methyl­phenyl­sulfin­yl)-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

(Received 6 March 2014; accepted 8 March 2014; online 15 March 2014)

In the title compound, C18H17BrO2S, the dihedral angle between the mean plane of the benzo­furan ring system and the benzene ring is 68.58 (4)°. In the crystal, mol­ecules are linked via pairs of C—H⋯O hydrogen bonds into inversion dimers. These dimers are linked by C—H⋯O hydrogen bonds and ππ inter­actions between the benzene rings of neighbouring mol­ecules [centroid–centroid distance = 3.783 (1) Å], forming a three-dimensional network. In addition, the stacked mol­ecules exhibit inversion-related S⋯O contacts [3.153 (1) Å] involving the sulfinyl groups.

Related literature

For background information and the crystal structures of related compounds, see: Choi et al. (2008[Choi, H. D., Seo, P. J., Son, B. W. & Lee, U. (2008). Acta Cryst. E64, o1826.], 2011[Choi, H. D., Seo, P. J., Son, B. W. & Lee, U. (2011). Acta Cryst. E67, o471.]). For details of sulfin­yl–sulfinyl inter­actions, see: Choi et al. (2013[Choi, H. D., Seo, P. J. & Lee, U. (2013). Acta Cryst. E69, o820.]) and for a review of carbon­yl–carbonyl inter­actions, see: Allen et al. (1998[Allen, F. H., Baalham, C. A., Lommerse, J. P. M. & Raithby, P. R. (1998). Acta Cryst. B54, 320-329.]).

[Scheme 1]

Experimental

Crystal data
  • C18H17BrO2S

  • Mr = 377.29

  • Triclinic, [P \overline 1]

  • a = 6.2336 (1) Å

  • b = 11.0353 (2) Å

  • c = 12.9149 (2) Å

  • α = 69.384 (1)°

  • β = 76.421 (1)°

  • γ = 76.799 (1)°

  • V = 797.84 (2) Å3

  • Z = 2

  • Mo Kα radiation

  • μ = 2.71 mm−1

  • T = 173 K

  • 0.35 × 0.34 × 0.28 mm

Data collection
  • Bruker SMART APEXII CCD diffractometer

  • Absorption correction: multi-scan (SADABS; Bruker, 2009[Bruker (2009). APEX2, SADABS and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.]) Tmin = 0.462, Tmax = 0.746

  • 14962 measured reflections

  • 4023 independent reflections

  • 3702 reflections with I > 2σ(I)

  • Rint = 0.031

Refinement
  • R[F2 > 2σ(F2)] = 0.026

  • wR(F2) = 0.070

  • S = 1.06

  • 4023 reflections

  • 203 parameters

  • H-atom parameters constrained

  • Δρmax = 0.36 e Å−3

  • Δρmin = −0.49 e Å−3

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A D—H H⋯A DA D—H⋯A
C6—H6⋯O1i 0.95 2.50 3.4478 (19) 172
C11—H11A⋯O2ii 0.98 2.36 3.244 (2) 150
Symmetry codes: (i) -x, -y+1, -z+1; (ii) x-1, y, z.

Data collection: APEX2 (Bruker, 2009[Bruker (2009). APEX2, SADABS and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.]); cell refinement: SAINT (Bruker, 2009[Bruker (2009). APEX2, SADABS and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.]); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012[Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849-854.]) and DIAMOND (Brandenburg, 1998[Brandenburg, K. (1998). DIAMOND. Crystal Impact GbR, Bonn, Germany.]); software used to prepare material for publication: SHELXL97.

Supporting information


Comment top

As a part of our continuing study of 5-bromo-2,4,6-trimethyl-1-benzofuran derivatives containing phenylsulfinyl (Choi et al., 2008) and 4-fluorophenylsulfinyl (Choi et al., 2011) substituents in the 3-position, we report herein on the crystal structure of the title compound.

In the title molecule (Fig. 1), the benzofuran unit is essentially planar, with a mean deviation of 0.027 (1) Å from the least-squares plane defined by the nine constituent atoms. The 3-methylphenyl ring is essentially planar, with a mean deviation of 0.011 (1) Å from the least-squares plane defined by the six constituent atoms. The dihedral angle formed by the benzofuran ring system and the 3-methylphenyl ring is 68.58 (4)°.

In the crystal structure (Fig. 2), molecules are linked via pairs of C–H···O hydrogen bonds into inversion dimers (Table 1). These dimers are further packed by C—H···O hydrogen bonds (Table 1) and π···π interactions between the benzene rings of neighbouring molecules, with a Cg1···Cg1iv distance of 3.783 (1) Å and an interplanar distance of 3.402 (1) Å resulting in a slippage of 1.655 (1) Å (Cg1 is the centroid of the C2–C7 benzene ring), forming a three-dimensional network. In addition, the crystal packing (Fig. 2) exhibits a sulfinyl–sulfinyl interaction (Choi et al., 2013) interpreted as similar to a type II carbonyl–carbonyl interaction (Allen et al. 1998), with S1···O2iii and O2iii···S1 distance of 3.153 (1) Å.

Related literature top

For background information and the crystal structures of related compounds, see: Choi et al. (2008, 2011). For details of sulfinyl–sulfinyl interactions, see: Choi et al. (2013) and for a review of carbonyl–carbonyl interactions, see: Allen et al. (1998).

Experimental top

3-Chloroperoxybenzoic acid (77%, 269 mg, 1.2 mmol) was added in small portions to a stirred solution of 5-bromo-2,4,6-trimethyl-3-(3-methylphenylsulfanyl)-1-benzofuran (397 mg, 1.1 mmol) in dichloromethane (35 mL) at 273 K. After being stirred at room temperature for 5h, 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, 2:1 v/v) to afford the title compound as a colorless solid [yield 72%, m.p. 469–470 K; Rf = 0.52 (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 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 0.95 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 using the SHELXL-97's command AFIX 137 (Sheldrick, 2008).

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 for Windows (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 molecule with the atom numbering scheme The displacement ellipsoids are drawn at the 50% probability level. The hydrogen atoms are presented as small spheres of arbitrary radius.
[Figure 2] Fig. 2. A view of the C—H···O, π···π and S···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, - z + 1; (ii) x - 1, y, z; (iii) - x + 2, - y + 1, - z; (iv) - x + 1, -y + 1, - z + 1; (v) x + 1, y, z.]
5-Bromo-2,4,6-trimethyl-3-(3-methylphenylsulfinyl)-1-benzofuran top
Crystal data top
C18H17BrO2SZ = 2
Mr = 377.29F(000) = 384
Triclinic, P1Dx = 1.570 Mg m3
Hall symbol: -P 1Melting point = 469–470 K
a = 6.2336 (1) ÅMo Kα radiation, λ = 0.71073 Å
b = 11.0353 (2) ÅCell parameters from 8866 reflections
c = 12.9149 (2) Åθ = 3.0–28.4°
α = 69.384 (1)°µ = 2.71 mm1
β = 76.421 (1)°T = 173 K
γ = 76.799 (1)°Block, colourless
V = 797.84 (2) Å30.35 × 0.34 × 0.28 mm
Data collection top
Bruker SMART APEXII CCD
diffractometer
4023 independent reflections
Radiation source: rotating anode3702 reflections with I > 2σ(I)
Graphite multilayer monochromatorRint = 0.031
Detector resolution: 10.0 pixels mm-1θmax = 28.4°, θmin = 1.7°
ϕ and ω scansh = 88
Absorption correction: multi-scan
(SADABS; Bruker, 2009)
k = 1414
Tmin = 0.462, Tmax = 0.746l = 1717
14962 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)] = 0.026Hydrogen site location: difference Fourier map
wR(F2) = 0.070H-atom parameters constrained
S = 1.06 w = 1/[σ2(Fo2) + (0.0354P)2 + 0.3061P]
where P = (Fo2 + 2Fc2)/3
4023 reflections(Δ/σ)max = 0.001
203 parametersΔρmax = 0.36 e Å3
0 restraintsΔρmin = 0.49 e Å3
Crystal data top
C18H17BrO2Sγ = 76.799 (1)°
Mr = 377.29V = 797.84 (2) Å3
Triclinic, P1Z = 2
a = 6.2336 (1) ÅMo Kα radiation
b = 11.0353 (2) ŵ = 2.71 mm1
c = 12.9149 (2) ÅT = 173 K
α = 69.384 (1)°0.35 × 0.34 × 0.28 mm
β = 76.421 (1)°
Data collection top
Bruker SMART APEXII CCD
diffractometer
4023 independent reflections
Absorption correction: multi-scan
(SADABS; Bruker, 2009)
3702 reflections with I > 2σ(I)
Tmin = 0.462, Tmax = 0.746Rint = 0.031
14962 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0260 restraints
wR(F2) = 0.070H-atom parameters constrained
S = 1.06Δρmax = 0.36 e Å3
4023 reflectionsΔρmin = 0.49 e Å3
203 parameters
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
Br10.62873 (3)0.900826 (16)0.403993 (14)0.03223 (7)
S10.75692 (6)0.51077 (3)0.11568 (3)0.01987 (9)
O10.27755 (19)0.45708 (11)0.37436 (9)0.0241 (2)
O20.99335 (19)0.51170 (11)0.12084 (10)0.0265 (2)
C10.5810 (3)0.51004 (14)0.24439 (12)0.0196 (3)
C20.5305 (2)0.59855 (14)0.31119 (12)0.0190 (3)
C30.6265 (3)0.69926 (14)0.31564 (12)0.0195 (3)
C40.5100 (3)0.76127 (15)0.39418 (13)0.0219 (3)
C50.3111 (3)0.72874 (16)0.46735 (13)0.0244 (3)
C60.2268 (3)0.62354 (17)0.46533 (13)0.0252 (3)
H60.09640.59540.51540.030*
C70.3399 (3)0.56176 (15)0.38791 (12)0.0214 (3)
C80.4262 (3)0.42809 (15)0.28649 (12)0.0221 (3)
C90.8457 (3)0.73299 (16)0.24263 (14)0.0242 (3)
H9A0.81710.81100.17820.036*
H9B0.92530.65920.21590.036*
H9C0.93720.75060.28630.036*
C100.1860 (3)0.80420 (19)0.54665 (16)0.0341 (4)
H10A0.05870.76190.59380.051*
H10B0.13180.89430.50330.051*
H10C0.28630.80540.59430.051*
C110.3854 (3)0.31944 (16)0.25548 (14)0.0270 (3)
H11A0.24700.34620.22400.041*
H11B0.37130.24220.32240.041*
H11C0.51080.29790.19950.041*
C120.6482 (3)0.67448 (14)0.03546 (12)0.0198 (3)
C130.7999 (3)0.75067 (15)0.04158 (12)0.0225 (3)
H130.95570.71830.04740.027*
C140.7230 (3)0.87472 (16)0.11039 (14)0.0275 (3)
C150.4952 (3)0.92001 (17)0.09772 (15)0.0329 (4)
H150.44111.00570.14250.039*
C160.3449 (3)0.84324 (19)0.02136 (15)0.0337 (4)
H160.18930.87650.01440.040*
C170.4195 (3)0.71802 (17)0.04509 (14)0.0272 (3)
H170.31680.66350.09590.033*
C180.8835 (4)0.9564 (2)0.19860 (17)0.0443 (5)
H18A0.84800.97330.27290.066*
H18B1.03660.90920.19530.066*
H18C0.87031.03990.18500.066*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Br10.04364 (12)0.02725 (10)0.03175 (10)0.01115 (8)0.00252 (8)0.01557 (7)
S10.02068 (18)0.01787 (17)0.02010 (17)0.00149 (13)0.00020 (13)0.00790 (13)
O10.0248 (6)0.0267 (6)0.0223 (5)0.0103 (5)0.0007 (4)0.0087 (4)
O20.0194 (5)0.0287 (6)0.0292 (6)0.0009 (4)0.0019 (4)0.0109 (5)
C10.0212 (7)0.0183 (6)0.0185 (6)0.0026 (5)0.0023 (5)0.0058 (5)
C20.0199 (7)0.0189 (7)0.0174 (6)0.0019 (5)0.0029 (5)0.0054 (5)
C30.0205 (7)0.0181 (6)0.0187 (6)0.0028 (5)0.0033 (5)0.0047 (5)
C40.0260 (8)0.0195 (7)0.0216 (7)0.0031 (6)0.0054 (6)0.0076 (6)
C50.0247 (8)0.0268 (8)0.0220 (7)0.0008 (6)0.0034 (6)0.0113 (6)
C60.0215 (7)0.0319 (8)0.0213 (7)0.0058 (6)0.0009 (6)0.0093 (6)
C70.0226 (7)0.0215 (7)0.0199 (7)0.0058 (6)0.0030 (6)0.0054 (5)
C80.0253 (8)0.0212 (7)0.0190 (7)0.0041 (6)0.0039 (6)0.0052 (5)
C90.0231 (7)0.0237 (7)0.0269 (7)0.0071 (6)0.0008 (6)0.0106 (6)
C100.0325 (9)0.0390 (10)0.0318 (9)0.0002 (8)0.0010 (7)0.0204 (8)
C110.0324 (9)0.0236 (8)0.0282 (8)0.0094 (7)0.0055 (7)0.0085 (6)
C120.0223 (7)0.0191 (7)0.0180 (6)0.0024 (6)0.0027 (5)0.0069 (5)
C130.0242 (8)0.0235 (7)0.0213 (7)0.0064 (6)0.0022 (6)0.0084 (6)
C140.0363 (9)0.0243 (8)0.0239 (7)0.0107 (7)0.0056 (7)0.0061 (6)
C150.0436 (11)0.0230 (8)0.0299 (8)0.0011 (7)0.0140 (8)0.0047 (6)
C160.0266 (9)0.0370 (10)0.0324 (9)0.0061 (7)0.0082 (7)0.0097 (7)
C170.0226 (8)0.0304 (8)0.0253 (8)0.0026 (6)0.0018 (6)0.0071 (6)
C180.0531 (13)0.0348 (10)0.0388 (10)0.0213 (9)0.0083 (9)0.0051 (8)
Geometric parameters (Å, º) top
Br1—C41.9073 (15)C9—H9C0.9800
S1—O21.4934 (12)C10—H10A0.9800
S1—C11.7619 (15)C10—H10B0.9800
S1—C121.8024 (15)C10—H10C0.9800
S1—O2i3.1527 (12)C11—H11A0.9800
O1—C81.3694 (19)C11—H11B0.9800
O1—C71.3770 (18)C11—H11C0.9800
C1—C81.361 (2)C12—C131.387 (2)
C1—C21.457 (2)C12—C171.387 (2)
C2—C71.393 (2)C13—C141.392 (2)
C2—C31.401 (2)C13—H130.9500
C3—C41.393 (2)C14—C151.385 (3)
C3—C91.508 (2)C14—C181.505 (2)
C4—C51.405 (2)C15—C161.381 (3)
C5—C61.390 (2)C15—H150.9500
C5—C101.510 (2)C16—C171.386 (2)
C6—C71.375 (2)C16—H160.9500
C6—H60.9500C17—H170.9500
C8—C111.479 (2)C18—H18A0.9800
C9—H9A0.9800C18—H18B0.9800
C9—H9B0.9800C18—H18C0.9800
O2—S1—C1111.08 (7)C5—C10—H10A109.5
O2—S1—C12106.70 (7)C5—C10—H10B109.5
C1—S1—C1296.91 (7)H10A—C10—H10B109.5
O2—S1—O2i78.25 (6)C5—C10—H10C109.5
C1—S1—O2i169.73 (6)H10A—C10—H10C109.5
C12—S1—O2i83.97 (5)H10B—C10—H10C109.5
C8—O1—C7106.60 (12)C8—C11—H11A109.5
C8—C1—C2107.12 (13)C8—C11—H11B109.5
C8—C1—S1118.68 (12)H11A—C11—H11B109.5
C2—C1—S1133.04 (11)C8—C11—H11C109.5
C7—C2—C3119.45 (14)H11A—C11—H11C109.5
C7—C2—C1104.27 (13)H11B—C11—H11C109.5
C3—C2—C1136.25 (14)C13—C12—C17121.63 (14)
C4—C3—C2115.39 (14)C13—C12—S1117.57 (12)
C4—C3—C9123.20 (13)C17—C12—S1120.62 (12)
C2—C3—C9121.37 (13)C12—C13—C14119.71 (15)
C3—C4—C5125.00 (14)C12—C13—H13120.1
C3—C4—Br1117.82 (11)C14—C13—H13120.1
C5—C4—Br1117.18 (11)C15—C14—C13118.57 (16)
C6—C5—C4118.23 (14)C15—C14—C18120.73 (16)
C6—C5—C10119.23 (15)C13—C14—C18120.69 (17)
C4—C5—C10122.54 (15)C16—C15—C14121.38 (16)
C7—C6—C5117.29 (14)C16—C15—H15119.3
C7—C6—H6121.4C14—C15—H15119.3
C5—C6—H6121.4C15—C16—C17120.44 (17)
C6—C7—O1124.56 (14)C15—C16—H16119.8
C6—C7—C2124.45 (14)C17—C16—H16119.8
O1—C7—C2110.98 (13)C16—C17—C12118.19 (16)
C1—C8—O1110.99 (13)C16—C17—H17120.9
C1—C8—C11133.49 (15)C12—C17—H17120.9
O1—C8—C11115.50 (14)C14—C18—H18A109.5
C3—C9—H9A109.5C14—C18—H18B109.5
C3—C9—H9B109.5H18A—C18—H18B109.5
H9A—C9—H9B109.5C14—C18—H18C109.5
C3—C9—H9C109.5H18A—C18—H18C109.5
H9A—C9—H9C109.5H18B—C18—H18C109.5
H9B—C9—H9C109.5
O2—S1—C1—C8136.06 (12)C8—O1—C7—C21.35 (16)
C12—S1—C1—C8113.02 (13)C3—C2—C7—C64.5 (2)
O2—S1—C1—C258.06 (17)C1—C2—C7—C6177.07 (15)
C12—S1—C1—C252.85 (16)C3—C2—C7—O1176.74 (13)
C8—C1—C2—C71.46 (16)C1—C2—C7—O11.73 (16)
S1—C1—C2—C7165.60 (13)C2—C1—C8—O10.71 (17)
C8—C1—C2—C3176.62 (17)S1—C1—C8—O1168.54 (10)
S1—C1—C2—C316.3 (3)C2—C1—C8—C11179.18 (16)
C7—C2—C3—C44.3 (2)S1—C1—C8—C119.9 (2)
C1—C2—C3—C4177.88 (16)C7—O1—C8—C10.35 (17)
C7—C2—C3—C9173.53 (14)C7—O1—C8—C11178.42 (13)
C1—C2—C3—C94.3 (3)O2—S1—C12—C1325.77 (14)
C2—C3—C4—C50.9 (2)C1—S1—C12—C13140.27 (12)
C9—C3—C4—C5176.88 (15)O2—S1—C12—C17158.95 (13)
C2—C3—C4—Br1179.31 (10)C1—S1—C12—C1744.45 (14)
C9—C3—C4—Br12.9 (2)C17—C12—C13—C140.8 (2)
C3—C4—C5—C62.7 (2)S1—C12—C13—C14176.07 (12)
Br1—C4—C5—C6177.13 (12)C12—C13—C14—C151.6 (2)
C3—C4—C5—C10176.77 (15)C12—C13—C14—C18176.88 (16)
Br1—C4—C5—C103.4 (2)C13—C14—C15—C162.1 (3)
C4—C5—C6—C72.7 (2)C18—C14—C15—C16176.39 (18)
C10—C5—C6—C7176.80 (15)C14—C15—C16—C170.1 (3)
C5—C6—C7—O1179.40 (14)C15—C16—C17—C122.3 (3)
C5—C6—C7—C20.8 (2)C13—C12—C17—C162.8 (2)
C8—O1—C7—C6177.44 (15)S1—C12—C17—C16177.85 (13)
Symmetry code: (i) x+2, y+1, z.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
C6—H6···O1ii0.952.503.4478 (19)172
C11—H11A···O2iii0.982.363.244 (2)150
Symmetry codes: (ii) x, y+1, z+1; (iii) x1, y, z.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
C6—H6···O1i0.952.503.4478 (19)171.8
C11—H11A···O2ii0.982.363.244 (2)149.8
Symmetry codes: (i) x, y+1, z+1; (ii) x1, y, z.
 

References

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