organic compounds
2-Chloroethyl 2-(5-bromo-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
In the title compound, C13H12BrClO4S, the O atom and the methyl group of the methylsulfinyl substituent lie on opposite sides of the plane of the benzofuran fragment. There is a mean deviation of 0.016 (4) Å from the least-squares plane defined by the nine constituent benzofuran atoms. The is stabilized by aromatic π–π interactions between the benzene rings of neighbouring molecules [centroid–centroid distance = 3.689 (7) Å]and by a weak C—H⋯π interaction between an H atom of the methylene group bonded to the carboxylate O atom and the benzene ring of an adjacent molecule. In addition, the exhibits weak non-classical intermolecular C—H⋯O hydrogen bonds. The chloroethyl group is disordered over two positions, with refined site-occupancy factors of 0.767 (6) and 0.233 (6).
Related literature
For the crystal structures of similar alkyl 2-(5-bromo-3-methylsulfinyl-1-benzofuran-2-yl)acetate derivatives. see: Choi et al. (2008a,b).
Experimental
Crystal data
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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/S1600536809012847/sj2602sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536809012847/sj2602Isup2.hkl
77% 3-Chloroperoxybenzoic acid (271 mg, 1.1 mmol) was added in small portions to a stirred solution of 2-chloroethyl 2-(5-bromo-3-methylsulfanyl-1-benzofuran-2-yl)acetate (380 mg, 1.0 mmol) in dichloromethane (40 ml) at 273 K. After stirring for 3 h at room temperature, the mixture was washed with saturated sodium bicarbonate solution and the organic layer was separated, dried over magnesium sulfate, filtered and concentrated in vacuum. The residue was purified by δ 3.07 (s, 3H), 3.70 (t, J = 5.48 Hz, 2H), 4.12 (s, 2H), 4.41 (t, J = 5.48 Hz, 2H), 7.41 (d, J = 8.76 Hz, 1H), 7.71 (dd, J = 8.47 Hz and J = 1.82 Hz, 1H), 8.05 (s, 1H).
(hexane-ethyl acetate, 1:2 v/v) to afford the title compound as a colorless solid [yield 80%, m.p. 436-437 K; Rf = 0.41 (hexane-ethyl acetate, 1;2 v/v)]. Single crystals suitable for X-ray diffraction were prepared by evaporation of a solution of the title compound in chloroform at room temperature. Spectroscopic analysis: 1H NMR (CDCl3, 400 MHz)All 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, and 0.96 Å for the methyl H atoms.Uiso(H) = 1.2Ueq(C) for the aryl and methylene H atoms, and 1.5Ueq(C) for methyl H atoms. The chloroethyl group is disordered over two positions, with site–occupancy factors, from
of 0.767 (6) (C11A—C12A—ClA) and 0.233 (7) (C11B—C12B—ClB). Both sets of C and Cl atoms were restrained using the commands ISOR (0.01), EADP, and the C—C and C—Cl distances (A & B) were restrained to 1.46 (3) and 1.55 (3) Å, respectively, using the command DFIX. Despite this the atomic displacement parameters for the C atoms of the disordered chhloroethyl group were large, reflecting additional disorder and the room temperature data collection.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).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 a small spheres of arbitrary radius. | |
Fig. 2. The π–π and C—H···π interactions (dotted lines) in the title compound. Cg denotes the ring centroid of the C2···C7 benzene ring. The disordered component of the chloroethyl group, part B, has been omitted for clarity as have H atoms not involved in intermolecular contacts. [Symmetry codes: (i)x, y-1, z; (ii) -x+1, -y, -z; (iii) -x+1, -y+1, -z; (iv) x, y+1, z.] | |
Fig. 3. The C—H···O hydrogen bonds (dotted lines) in the title compound. The disordered component of the chloroethyl group, part B, has been omitted for clarity as have H atoms not involved in intermolecular contacts. [Symmetry codes: (ii) -x+1, -y+1, -z+1; (iii) -x+1, -y+1, -z; (iv) -x, -y+1, -z (v) -x, -y+1, -z+1.] |
C13H12BrClO4S | Z = 2 |
Mr = 379.65 | F(000) = 380 |
Triclinic, P1 | Dx = 1.705 Mg m−3 |
Hall symbol: -p 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 8.495 (1) Å | Cell parameters from 2253 reflections |
b = 9.882 (2) Å | θ = 2.7–25.7° |
c = 10.277 (2) Å | µ = 3.11 mm−1 |
α = 71.095 (3)° | T = 298 K |
β = 80.331 (3)° | Block, colorless |
γ = 65.012 (2)° | 0.30 × 0.20 × 0.10 mm |
V = 739.3 (2) Å3 |
Bruker SMART CCD diffractometer | 2575 independent reflections |
Radiation source: fine-focus sealed tube | 1972 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.027 |
Detector resolution: 10.0 pixels mm-1 | θmax = 25.0°, θmin = 2.1° |
ϕ and ω scans | h = −10→10 |
Absorption correction: multi-scan (SADABS; Sheldrick, 1999) | k = −11→11 |
Tmin = 0.475, Tmax = 0.736 | l = −12→12 |
5479 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)] = 0.055 | Hydrogen site location: difference Fourier map |
wR(F2) = 0.133 | H-atom parameters constrained |
S = 1.07 | w = 1/[σ2(Fo2) + (0.054P)2 + 1.6319P] where P = (Fo2 + 2Fc2)/3 |
2575 reflections | (Δ/σ)max < 0.000 |
192 parameters | Δρmax = 0.80 e Å−3 |
57 restraints | Δρmin = −0.81 e Å−3 |
C13H12BrClO4S | γ = 65.012 (2)° |
Mr = 379.65 | V = 739.3 (2) Å3 |
Triclinic, P1 | Z = 2 |
a = 8.495 (1) Å | Mo Kα radiation |
b = 9.882 (2) Å | µ = 3.11 mm−1 |
c = 10.277 (2) Å | T = 298 K |
α = 71.095 (3)° | 0.30 × 0.20 × 0.10 mm |
β = 80.331 (3)° |
Bruker SMART CCD diffractometer | 2575 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1999) | 1972 reflections with I > 2σ(I) |
Tmin = 0.475, Tmax = 0.736 | Rint = 0.027 |
5479 measured reflections |
R[F2 > 2σ(F2)] = 0.055 | 57 restraints |
wR(F2) = 0.133 | H-atom parameters constrained |
S = 1.07 | Δρmax = 0.80 e Å−3 |
2575 reflections | Δρmin = −0.81 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) | |
Br | 0.68390 (9) | 0.78885 (8) | 0.10766 (7) | 0.0571 (3) | |
ClA | −0.1810 (4) | −0.0480 (3) | 0.3580 (3) | 0.0928 (12) | 0.764 (6) |
ClB | −0.0308 (13) | −0.0729 (11) | 0.1579 (12) | 0.0928 (12) | 0.24 |
S | 0.25778 (18) | 0.40156 (16) | 0.46589 (13) | 0.0391 (4) | |
O1 | 0.1648 (4) | 0.5435 (4) | 0.0705 (3) | 0.0355 (8) | |
O2 | 0.0404 (6) | 0.1375 (5) | 0.2446 (7) | 0.0824 (18) | |
O3 | 0.2843 (6) | 0.1340 (5) | 0.2991 (5) | 0.0622 (12) | |
O4 | 0.2572 (6) | 0.5265 (5) | 0.5185 (4) | 0.0537 (11) | |
C1 | 0.2533 (6) | 0.4767 (6) | 0.2849 (5) | 0.0313 (11) | |
C2 | 0.3429 (6) | 0.5699 (5) | 0.1946 (5) | 0.0287 (11) | |
C3 | 0.4664 (7) | 0.6219 (6) | 0.2093 (6) | 0.0362 (12) | |
H3 | 0.5126 | 0.5960 | 0.2941 | 0.043* | |
C4 | 0.5167 (7) | 0.7138 (6) | 0.0920 (6) | 0.0379 (13) | |
C5 | 0.4497 (7) | 0.7563 (6) | −0.0359 (6) | 0.0395 (13) | |
H5 | 0.4849 | 0.8216 | −0.1110 | 0.047* | |
C6 | 0.3306 (7) | 0.7020 (6) | −0.0522 (6) | 0.0382 (13) | |
H6 | 0.2860 | 0.7271 | −0.1375 | 0.046* | |
C7 | 0.2815 (6) | 0.6090 (6) | 0.0641 (5) | 0.0326 (12) | |
C8 | 0.1505 (7) | 0.4640 (6) | 0.2065 (5) | 0.0328 (11) | |
C9 | 0.0354 (7) | 0.3767 (6) | 0.2371 (6) | 0.0377 (13) | |
H9A | −0.0383 | 0.4141 | 0.1598 | 0.045* | |
H9B | −0.0392 | 0.3968 | 0.3170 | 0.045* | |
C10 | 0.1380 (8) | 0.2042 (7) | 0.2639 (6) | 0.0446 (14) | |
C11A | 0.1269 (13) | −0.0271 (11) | 0.2556 (12) | 0.069 (3) | 0.764 (6) |
H11A | 0.2031 | −0.0798 | 0.3329 | 0.083* | 0.764 (6) |
H11B | 0.1968 | −0.0422 | 0.1725 | 0.083* | 0.764 (6) |
C12A | −0.004 (3) | −0.092 (3) | 0.275 (2) | 0.162 (6) | 0.764 (6) |
H12A | 0.0570 | −0.2031 | 0.3143 | 0.195* | 0.764 (6) |
H12B | −0.0332 | −0.0779 | 0.1832 | 0.195* | 0.764 (6) |
C11B | 0.107 (4) | −0.044 (3) | 0.343 (4) | 0.069 (3) | 0.24 |
H11C | 0.2242 | −0.1045 | 0.3153 | 0.083* | 0.236 (6) |
H11D | 0.1055 | −0.0480 | 0.4385 | 0.083* | 0.236 (6) |
C12B | −0.013 (10) | −0.105 (10) | 0.324 (4) | 0.162 (6) | 0.24 |
H12C | −0.1259 | −0.0542 | 0.3648 | 0.195* | 0.236 (6) |
H12D | 0.0286 | −0.2156 | 0.3696 | 0.195* | 0.236 (6) |
C13 | 0.4757 (8) | 0.2580 (7) | 0.4793 (7) | 0.0566 (17) | |
H13A | 0.5553 | 0.3084 | 0.4440 | 0.085* | |
H13B | 0.4904 | 0.1885 | 0.4269 | 0.085* | |
H13C | 0.4983 | 0.2002 | 0.5740 | 0.085* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Br | 0.0555 (4) | 0.0544 (4) | 0.0722 (5) | −0.0345 (3) | −0.0077 (3) | −0.0112 (3) |
ClA | 0.086 (2) | 0.0646 (16) | 0.118 (2) | −0.0415 (14) | 0.0202 (16) | −0.0107 (14) |
ClB | 0.086 (2) | 0.0646 (16) | 0.118 (2) | −0.0415 (14) | 0.0202 (16) | −0.0107 (14) |
S | 0.0433 (8) | 0.0443 (8) | 0.0292 (7) | −0.0198 (7) | −0.0030 (6) | −0.0056 (6) |
O1 | 0.039 (2) | 0.041 (2) | 0.0288 (19) | −0.0193 (17) | −0.0074 (16) | −0.0062 (16) |
O2 | 0.044 (3) | 0.040 (3) | 0.174 (6) | −0.012 (2) | −0.022 (3) | −0.040 (3) |
O3 | 0.045 (3) | 0.046 (3) | 0.087 (3) | −0.014 (2) | −0.021 (2) | −0.006 (2) |
O4 | 0.061 (3) | 0.065 (3) | 0.041 (2) | −0.022 (2) | −0.001 (2) | −0.027 (2) |
C1 | 0.033 (3) | 0.033 (3) | 0.030 (3) | −0.013 (2) | −0.005 (2) | −0.009 (2) |
C2 | 0.030 (3) | 0.023 (2) | 0.029 (3) | −0.005 (2) | −0.002 (2) | −0.009 (2) |
C3 | 0.039 (3) | 0.033 (3) | 0.038 (3) | −0.012 (2) | −0.004 (2) | −0.014 (2) |
C4 | 0.039 (3) | 0.033 (3) | 0.049 (3) | −0.017 (2) | −0.002 (3) | −0.015 (3) |
C5 | 0.040 (3) | 0.035 (3) | 0.040 (3) | −0.015 (2) | 0.001 (3) | −0.007 (2) |
C6 | 0.042 (3) | 0.039 (3) | 0.030 (3) | −0.014 (3) | −0.004 (2) | −0.007 (2) |
C7 | 0.029 (3) | 0.028 (3) | 0.039 (3) | −0.007 (2) | −0.006 (2) | −0.012 (2) |
C8 | 0.033 (3) | 0.031 (3) | 0.033 (3) | −0.012 (2) | −0.001 (2) | −0.009 (2) |
C9 | 0.036 (3) | 0.045 (3) | 0.037 (3) | −0.020 (3) | −0.005 (2) | −0.012 (3) |
C10 | 0.045 (4) | 0.041 (3) | 0.048 (4) | −0.016 (3) | −0.003 (3) | −0.012 (3) |
C11A | 0.059 (4) | 0.062 (4) | 0.090 (5) | −0.019 (3) | −0.002 (4) | −0.032 (4) |
C12A | 0.170 (8) | 0.120 (7) | 0.171 (9) | −0.051 (6) | 0.035 (7) | −0.037 (7) |
C11B | 0.059 (4) | 0.062 (4) | 0.090 (5) | −0.019 (3) | −0.002 (4) | −0.032 (4) |
C12B | 0.170 (8) | 0.120 (7) | 0.171 (9) | −0.051 (6) | 0.035 (7) | −0.037 (7) |
C13 | 0.055 (4) | 0.051 (4) | 0.057 (4) | −0.010 (3) | −0.017 (3) | −0.012 (3) |
Br—C4 | 1.907 (5) | C5—H5 | 0.9300 |
ClA—C12A | 1.559 (19) | C6—C7 | 1.375 (7) |
ClB—C12B | 1.65 (3) | C6—H6 | 0.9300 |
S—O4 | 1.498 (4) | C8—C9 | 1.494 (7) |
S—C1 | 1.766 (5) | C9—C10 | 1.505 (8) |
S—C13 | 1.788 (6) | C9—H9A | 0.9700 |
O1—C8 | 1.377 (6) | C9—H9B | 0.9700 |
O1—C7 | 1.378 (6) | C11A—C12A | 1.459 (15) |
O2—C10 | 1.328 (7) | C11A—H11A | 0.9700 |
O2—C11A | 1.448 (9) | C11A—H11B | 0.9700 |
O2—C11B | 1.65 (2) | C12A—H12A | 0.9700 |
O3—C10 | 1.190 (7) | C12A—H12B | 0.9700 |
C1—C8 | 1.350 (7) | C11B—C12B | 1.45 (2) |
C1—C2 | 1.445 (7) | C11B—H11C | 0.9700 |
C2—C3 | 1.395 (7) | C11B—H11D | 0.9700 |
C2—C7 | 1.396 (7) | C12B—H12C | 0.9700 |
C3—C4 | 1.380 (7) | C12B—H12D | 0.9700 |
C3—H3 | 0.9300 | C13—H13A | 0.9600 |
C4—C5 | 1.385 (8) | C13—H13B | 0.9600 |
C5—C6 | 1.383 (7) | C13—H13C | 0.9600 |
O4—S—C1 | 105.9 (2) | C10—C9—H9B | 109.2 |
O4—S—C13 | 106.1 (3) | H9A—C9—H9B | 107.9 |
C1—S—C13 | 98.5 (3) | O3—C10—O2 | 123.5 (5) |
C8—O1—C7 | 106.5 (4) | O3—C10—C9 | 126.4 (5) |
C10—O2—C11A | 116.1 (6) | O2—C10—C9 | 110.0 (5) |
C10—O2—C11B | 109.4 (13) | O2—C11A—C12A | 108.9 (13) |
C11A—O2—C11B | 31.3 (12) | O2—C11A—H11A | 109.9 |
C8—C1—C2 | 107.4 (4) | C12A—C11A—H11A | 109.9 |
C8—C1—S | 123.8 (4) | O2—C11A—H11B | 109.9 |
C2—C1—S | 128.7 (4) | C12A—C11A—H11B | 109.9 |
C3—C2—C7 | 119.1 (5) | H11A—C11A—H11B | 108.3 |
C3—C2—C1 | 136.0 (5) | C11A—C12A—ClA | 128.4 (16) |
C7—C2—C1 | 104.9 (4) | C11A—C12A—H12A | 105.2 |
C4—C3—C2 | 116.8 (5) | ClA—C12A—H12A | 105.2 |
C4—C3—H3 | 121.6 | C11A—C12A—H12B | 105.2 |
C2—C3—H3 | 121.6 | ClA—C12A—H12B | 105.2 |
C3—C4—C5 | 123.3 (5) | H12A—C12A—H12B | 105.9 |
C3—C4—Br | 118.2 (4) | C12B—C11B—O2 | 106 (4) |
C5—C4—Br | 118.4 (4) | C12B—C11B—H11C | 110.5 |
C6—C5—C4 | 120.3 (5) | O2—C11B—H11C | 110.5 |
C6—C5—H5 | 119.9 | C12B—C11B—H11D | 110.5 |
C4—C5—H5 | 119.9 | O2—C11B—H11D | 110.5 |
C7—C6—C5 | 116.6 (5) | H11C—C11B—H11D | 108.7 |
C7—C6—H6 | 121.7 | C11B—C12B—ClB | 110 (3) |
C5—C6—H6 | 121.7 | C11B—C12B—H12C | 109.7 |
C6—C7—O1 | 126.0 (5) | ClB—C12B—H12C | 109.7 |
C6—C7—C2 | 123.8 (5) | C11B—C12B—H12D | 109.7 |
O1—C7—C2 | 110.3 (4) | ClB—C12B—H12D | 109.7 |
C1—C8—O1 | 110.9 (4) | H12C—C12B—H12D | 108.2 |
C1—C8—C9 | 133.1 (5) | S—C13—H13A | 109.5 |
O1—C8—C9 | 115.9 (4) | S—C13—H13B | 109.5 |
C8—C9—C10 | 112.0 (4) | H13A—C13—H13B | 109.5 |
C8—C9—H9A | 109.2 | S—C13—H13C | 109.5 |
C10—C9—H9A | 109.2 | H13A—C13—H13C | 109.5 |
C8—C9—H9B | 109.2 | H13B—C13—H13C | 109.5 |
O4—S—C1—C8 | −135.7 (5) | C1—C2—C7—O1 | −1.1 (5) |
C13—S—C1—C8 | 114.8 (5) | C2—C1—C8—O1 | −0.5 (6) |
O4—S—C1—C2 | 39.3 (5) | S—C1—C8—O1 | 175.4 (3) |
C13—S—C1—C2 | −70.2 (5) | C2—C1—C8—C9 | 176.0 (5) |
C8—C1—C2—C3 | −178.3 (6) | S—C1—C8—C9 | −8.1 (9) |
S—C1—C2—C3 | 6.0 (9) | C7—O1—C8—C1 | −0.1 (5) |
C8—C1—C2—C7 | 0.9 (5) | C7—O1—C8—C9 | −177.3 (4) |
S—C1—C2—C7 | −174.7 (4) | C1—C8—C9—C10 | −71.8 (8) |
C7—C2—C3—C4 | 1.7 (7) | O1—C8—C9—C10 | 104.6 (5) |
C1—C2—C3—C4 | −179.1 (5) | C11A—O2—C10—O3 | −5.9 (11) |
C2—C3—C4—C5 | 0.7 (8) | C11B—O2—C10—O3 | 27.3 (16) |
C2—C3—C4—Br | 179.5 (4) | C11A—O2—C10—C9 | 175.0 (7) |
C3—C4—C5—C6 | −2.4 (8) | C11B—O2—C10—C9 | −151.7 (14) |
Br—C4—C5—C6 | 178.8 (4) | C8—C9—C10—O3 | 21.9 (9) |
C4—C5—C6—C7 | 1.5 (8) | C8—C9—C10—O2 | −159.1 (5) |
C5—C6—C7—O1 | 179.8 (5) | C10—O2—C11A—C12A | 162.3 (11) |
C5—C6—C7—C2 | 0.9 (8) | C11B—O2—C11A—C12A | 78 (3) |
C8—O1—C7—C6 | −178.2 (5) | O2—C11A—C12A—ClA | −36 (3) |
C8—O1—C7—C2 | 0.8 (5) | C10—O2—C11B—C12B | 176 (3) |
C3—C2—C7—C6 | −2.6 (8) | C11A—O2—C11B—C12B | −76 (4) |
C1—C2—C7—C6 | 178.0 (5) | O2—C11B—C12B—ClB | 52 (6) |
C3—C2—C7—O1 | 178.4 (4) |
D—H···A | D—H | H···A | D···A | D—H···A |
C11A—H11B···Cgi | 0.97 | 3.07 | 3.779 (7) | 131 |
C3—H3···O4ii | 0.93 | 2.60 | 3.483 (7) | 159 |
C5—H5···O3iii | 0.93 | 2.58 | 3.423 (7) | 150 |
C9—H9A···O1iv | 0.97 | 2.60 | 3.545 (6) | 165 |
C9—H9B···O4v | 0.97 | 2.34 | 3.294 (7) | 170 |
Symmetry codes: (i) x, y−1, z; (ii) −x+1, −y+1, −z+1; (iii) −x+1, −y+1, −z; (iv) −x, −y+1, −z; (v) −x, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C13H12BrClO4S |
Mr | 379.65 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 298 |
a, b, c (Å) | 8.495 (1), 9.882 (2), 10.277 (2) |
α, β, γ (°) | 71.095 (3), 80.331 (3), 65.012 (2) |
V (Å3) | 739.3 (2) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 3.11 |
Crystal size (mm) | 0.30 × 0.20 × 0.10 |
Data collection | |
Diffractometer | Bruker SMART CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1999) |
Tmin, Tmax | 0.475, 0.736 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5479, 2575, 1972 |
Rint | 0.027 |
(sin θ/λ)max (Å−1) | 0.594 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.055, 0.133, 1.07 |
No. of reflections | 2575 |
No. of parameters | 192 |
No. of restraints | 57 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.80, −0.81 |
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 |
C11A—H11B···Cgi | 0.97 | 3.07 | 3.779 (7) | 130.8 |
C3—H3···O4ii | 0.93 | 2.60 | 3.483 (7) | 159.0 |
C5—H5···O3iii | 0.93 | 2.58 | 3.423 (7) | 150.3 |
C9—H9A···O1iv | 0.97 | 2.60 | 3.545 (6) | 164.5 |
C9—H9B···O4v | 0.97 | 2.34 | 3.294 (7) | 169.8 |
Symmetry codes: (i) x, y−1, z; (ii) −x+1, −y+1, −z+1; (iii) −x+1, −y+1, −z; (iv) −x, −y+1, −z; (v) −x, −y+1, −z+1. |
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. (2008a). Acta Cryst. E64, o2250. Web of Science CSD CrossRef IUCr Journals Google Scholar
Choi, H. D., Seo, P. J., Son, B. W. & Lee, U. (2008b). Acta Cryst. E64, o2397. 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. (1999). SADABS. University of Göttingen, Germany. 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 alkyl 2-(5-bromo-3-methylsulfinyl-1-benzofuran-2-yl)acetate analogues, viz. isopropyl 2-(5-bromo-3-methylsulfinyl-1-benzofuran-2-yl)acetate (Choi et al., 2008a) and methyl 2-(5-bromo-3-methylsulfinyl-1-benzofuran-2-yl)acetate (Choi et al., 2008b). Here we report the crystal structure of the title compound, 2-chloroethyl 2-(5-bromo-3-methylsulfinyl-1-benzofuran-2-yl)acetate (Fig. 1).
The benzofuran unit is essentially planar, with a mean deviation of 0.016 (4) Å from the least-squares plane defined by the nine constituent atoms. The chloroethyl group is disordered over two positions with site–occupancy factors of 0.767 (6) (for atoms labelled A) and 0.233 (7) (for atoms labelled B). The molecular packing (Fig. 2) is stabilized by aromatic π–π interactions between the benzene rings of neighbouring molecules, with a Cg···Cgiii distance of 3.689 (7) Å (Cg is the centroid of the C2-C7 benzene ring; symmetry codes as in Fig. 2). The crystal packing is further stabilized by an intermolecular C—H···π interaction between an H atom of the methylene group bonded to the carboxylate O atom and the benzene ring of a neighbouring molecule, with a C11—H11B···Cgi distance of 3.07 Å (Table 1 and Fig. 2; symmetry code as in Fig. 2, Cgi is the centroid of the C2···C7 benzene ring). Additionally, the crystal structure exhibits weak, non-classical, intermolecular C—H···O hydrogen bonds; the first between a benzene H atom and the S═O unit, the second between a benzene H atom and the C═O unit, the third between an H atom of the methylene group bonded to the carboxylate C atom and the furan O atom, and the fourth between an H atom of the methylene group bonded to the carboxylate C atom and the S═O unit, respectively (Table 1 and Fig. 3; symmetry codes as in Fig. 3).