organic compounds
3-(4-Methoxybenzyl)-1-benzothiophene
aDepartment of Physics, AMET University, Kanathur, Chennai 603 112, India, bDepartment of Organic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, India, cDepartment of Physics, CPCL Polytechnic College, Chennai 600 068, India, and dDepartment of Research and Development, PRIST University, Vallam, Thanjavur 613 403, Tamil Nadu, India
*Correspondence e-mail: crystallography2010@gmail.com
In the title compound, C16H14OS, the dihedral angle between the benzothiophene ring system and the benzene ring is 72.41 (12)°. A weak intermolecular C—H⋯π interaction from the benzene ring to the benzothiophene ring system is observed in the crystal structure.
Related literature
For the biological activity of thiophene derivatives, see: Bonini et al. (2005); Brault et al. (2005); Isloora et al. (2010). For related structures, see: Gunasekaran et al. (2009); Umadevi et al. (2009). For bond-length data, see: Allen et al. (1987).
Experimental
Crystal data
|
Data collection: APEX2 (Bruker, 2004); cell SAINT (Bruker, 2004); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S1600536810018866/is2551sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810018866/is2551Isup2.hkl
To a solution of 1-(bromomethyl)-4-methoxybenzene (0.7 g, 3.48 mmol) in dry 1,2-dichloroethane (20 ml) ZnBr2 (0.23 g, 1.02 mmol) and benzo[b]thiophene (0.7 g, 5.22 mmol) were added. It was then stirred at room temperature for 6 h under N2 atmosphere. The solvent was removed and the residue was quenched with ice-water (50 ml) containing 1 ml of conc. HCl, extracted with chloroform (2 × 10 ml) and dried (Na2SO4). Removal of solvent followed by column chromatographic purification (n-hexane/ethyl acetate 94:6) afforded the product as a colourless crystal.
H atoms were positioned geometrically and refined using riding model with C—H = 0.93 Å and Uiso(H) = 1.2Ueq(C) for aromatic C—H, C—H = 0.97 Å and Uiso(H) = 1.2Ueq(C) for CH2, C—H = 0.96 Å and Uiso(H) = 1.5Ueq(C) for CH3.
Thiophene derivatives exhibit anti-HIV PR inhibitors (Bonini et al., 2005) and anti-breast cancer (Brault et al., 2005) activities. In addition, some of the benzo[b]thiophene derivatives shows significant antimicrobial and anti-inflammatory activities (Isloora et al., 2010).
The geometric parameters of the title molecule (Fig. 1) agree well with reported similar structures (Gunasekaran et al., 2009; Umadevi et al., 2009). The dihedral angle between the two benzene rings is 71.93 (8)°. The C1—S1 and C8—S1 bond distances are 1.738 (3) and 1.734 (3) Å respectively, which are comparable to the literature value of 1.712 (2) Å (Allen et al., 1987).
The crystal packing is stabilized by a weak C—H···π interaction [C14—H14···Cg (-1+x, y, -1+z), Table 1; Cg is the centroid of the ring defined by the atoms C1—C6] .
For the biological activity of thiophene derivatives, see: Bonini et al. (2005); Brault et al. (2005); Isloora et al. (2010). For related structures, see: Gunasekaran et al. (2009); Umadevi et al. (2009). For bond-length data, see: Allen et al. (1987).
Data collection: APEX2 (Bruker, 2004); cell
SAINT (Bruker, 2004); data reduction: SAINT (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).Fig. 1. The molecular structure of (I), with atom labels and 30% probability displacement ellipsoids for non-H atoms. |
C16H14OS | F(000) = 268 |
Mr = 254.33 | Dx = 1.298 Mg m−3 |
Monoclinic, Pc | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P -2yc | Cell parameters from 4241 reflections |
a = 8.0158 (6) Å | θ = 2.7–28.3° |
b = 10.8230 (9) Å | µ = 0.23 mm−1 |
c = 8.1219 (6) Å | T = 295 K |
β = 112.563 (4)° | Block, colourless |
V = 650.68 (9) Å3 | 0.25 × 0.20 × 0.20 mm |
Z = 2 |
Bruker SMART APEXII CCD diffractometer | 2946 independent reflections |
Radiation source: fine-focus sealed tube | 2721 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.171 |
Detector resolution: 0 pixels mm-1 | θmax = 28.3°, θmin = 1.9° |
ω and φ scans | h = −10→9 |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | k = −12→14 |
Tmin = 0.946, Tmax = 0.954 | l = −10→10 |
6033 measured reflections |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.066 | H-atom parameters constrained |
wR(F2) = 0.176 | w = 1/[σ2(Fo2) + (0.1211P)2 + 0.025P] where P = (Fo2 + 2Fc2)/3 |
S = 1.06 | (Δ/σ)max < 0.001 |
2946 reflections | Δρmax = 0.35 e Å−3 |
164 parameters | Δρmin = −0.48 e Å−3 |
2 restraints | Absolute structure: Flack (1983), 1337 Friedel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: −0.04 (11) |
C16H14OS | V = 650.68 (9) Å3 |
Mr = 254.33 | Z = 2 |
Monoclinic, Pc | Mo Kα radiation |
a = 8.0158 (6) Å | µ = 0.23 mm−1 |
b = 10.8230 (9) Å | T = 295 K |
c = 8.1219 (6) Å | 0.25 × 0.20 × 0.20 mm |
β = 112.563 (4)° |
Bruker SMART APEXII CCD diffractometer | 2946 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2721 reflections with I > 2σ(I) |
Tmin = 0.946, Tmax = 0.954 | Rint = 0.171 |
6033 measured reflections |
R[F2 > 2σ(F2)] = 0.066 | H-atom parameters constrained |
wR(F2) = 0.176 | Δρmax = 0.35 e Å−3 |
S = 1.06 | Δρmin = −0.48 e Å−3 |
2946 reflections | Absolute structure: Flack (1983), 1337 Friedel pairs |
164 parameters | Absolute structure parameter: −0.04 (11) |
2 restraints |
x | y | z | Uiso*/Ueq | ||
C1 | 0.9043 (4) | 0.0721 (3) | 0.6766 (3) | 0.0493 (6) | |
C2 | 1.0778 (5) | 0.0242 (3) | 0.7621 (4) | 0.0607 (7) | |
H2 | 1.0969 | −0.0510 | 0.8219 | 0.073* | |
C3 | 1.2203 (5) | 0.0925 (4) | 0.7547 (5) | 0.0671 (9) | |
H3 | 1.3374 | 0.0627 | 0.8111 | 0.081* | |
C4 | 1.1926 (5) | 0.2048 (4) | 0.6648 (5) | 0.0616 (7) | |
H4 | 1.2912 | 0.2494 | 0.6634 | 0.074* | |
C5 | 1.0204 (4) | 0.2504 (3) | 0.5777 (4) | 0.0513 (6) | |
H5 | 1.0025 | 0.3250 | 0.5165 | 0.062* | |
C6 | 0.8728 (3) | 0.1837 (2) | 0.5821 (3) | 0.0423 (5) | |
C7 | 0.6844 (3) | 0.2155 (2) | 0.5029 (3) | 0.0433 (5) | |
C8 | 0.5818 (4) | 0.1302 (3) | 0.5405 (4) | 0.0488 (5) | |
H8 | 0.4568 | 0.1362 | 0.5004 | 0.059* | |
C9 | 0.6202 (4) | 0.3311 (3) | 0.3944 (4) | 0.0557 (6) | |
H9A | 0.6662 | 0.3315 | 0.3000 | 0.067* | |
H9B | 0.6716 | 0.4018 | 0.4703 | 0.067* | |
C10 | 0.4183 (4) | 0.3466 (3) | 0.3119 (3) | 0.0497 (6) | |
C11 | 0.3305 (4) | 0.4346 (3) | 0.3745 (4) | 0.0532 (6) | |
H11 | 0.3975 | 0.4844 | 0.4704 | 0.064* | |
C12 | 0.1454 (4) | 0.4492 (3) | 0.2967 (4) | 0.0542 (6) | |
H12 | 0.0899 | 0.5101 | 0.3387 | 0.065* | |
C13 | 0.0417 (4) | 0.3743 (3) | 0.1570 (3) | 0.0470 (6) | |
C14 | 0.1274 (4) | 0.2862 (3) | 0.0923 (3) | 0.0517 (6) | |
H14 | 0.0605 | 0.2357 | −0.0028 | 0.062* | |
C15 | 0.3130 (4) | 0.2744 (3) | 0.1708 (4) | 0.0563 (7) | |
H15 | 0.3690 | 0.2153 | 0.1265 | 0.068* | |
C16 | −0.2496 (5) | 0.3249 (5) | −0.0572 (6) | 0.0793 (11) | |
H16A | −0.2253 | 0.3485 | −0.1597 | 0.119* | |
H16B | −0.3746 | 0.3397 | −0.0799 | 0.119* | |
H16C | −0.2233 | 0.2386 | −0.0332 | 0.119* | |
O1 | −0.1408 (3) | 0.3948 (3) | 0.0910 (3) | 0.0653 (6) | |
S1 | 0.70297 (12) | 0.00836 (7) | 0.67020 (11) | 0.0601 (2) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0614 (14) | 0.0440 (15) | 0.0452 (11) | −0.0010 (11) | 0.0235 (10) | −0.0009 (10) |
C2 | 0.0703 (18) | 0.0529 (17) | 0.0552 (15) | 0.0134 (14) | 0.0201 (12) | 0.0062 (12) |
C3 | 0.0586 (16) | 0.074 (2) | 0.0644 (16) | 0.0158 (15) | 0.0191 (13) | −0.0042 (15) |
C4 | 0.0546 (14) | 0.0643 (18) | 0.0702 (15) | −0.0037 (14) | 0.0286 (12) | −0.0104 (16) |
C5 | 0.0569 (14) | 0.0447 (14) | 0.0579 (13) | −0.0035 (11) | 0.0283 (11) | −0.0016 (10) |
C6 | 0.0517 (12) | 0.0365 (12) | 0.0417 (9) | −0.0009 (9) | 0.0213 (9) | −0.0032 (8) |
C7 | 0.0511 (11) | 0.0377 (12) | 0.0430 (10) | −0.0007 (10) | 0.0203 (8) | −0.0007 (9) |
C8 | 0.0549 (13) | 0.0414 (13) | 0.0537 (11) | −0.0035 (11) | 0.0250 (10) | −0.0008 (10) |
C9 | 0.0563 (14) | 0.0430 (15) | 0.0645 (14) | 0.0016 (12) | 0.0196 (11) | 0.0102 (12) |
C10 | 0.0580 (14) | 0.0403 (13) | 0.0511 (12) | 0.0057 (11) | 0.0211 (10) | 0.0068 (10) |
C11 | 0.0699 (16) | 0.0396 (14) | 0.0490 (11) | −0.0006 (12) | 0.0218 (11) | −0.0037 (10) |
C12 | 0.0717 (17) | 0.0425 (14) | 0.0544 (12) | 0.0106 (12) | 0.0309 (12) | −0.0033 (11) |
C13 | 0.0583 (14) | 0.0412 (13) | 0.0447 (10) | 0.0112 (10) | 0.0233 (10) | 0.0049 (9) |
C14 | 0.0597 (14) | 0.0473 (15) | 0.0442 (10) | 0.0103 (12) | 0.0155 (10) | −0.0068 (10) |
C15 | 0.0633 (16) | 0.0526 (17) | 0.0528 (12) | 0.0161 (12) | 0.0221 (11) | −0.0033 (11) |
C16 | 0.0594 (19) | 0.078 (3) | 0.090 (2) | 0.0062 (16) | 0.0179 (17) | −0.014 (2) |
O1 | 0.0607 (12) | 0.0675 (16) | 0.0672 (12) | 0.0173 (11) | 0.0238 (9) | −0.0048 (11) |
S1 | 0.0723 (4) | 0.0462 (4) | 0.0659 (4) | −0.0059 (3) | 0.0312 (3) | 0.0108 (3) |
C1—C2 | 1.394 (5) | C9—H9A | 0.9700 |
C1—C6 | 1.401 (4) | C9—H9B | 0.9700 |
C1—S1 | 1.738 (3) | C10—C15 | 1.376 (4) |
C2—C3 | 1.381 (6) | C10—C11 | 1.392 (4) |
C2—H2 | 0.9300 | C11—C12 | 1.380 (4) |
C3—C4 | 1.391 (6) | C11—H11 | 0.9300 |
C3—H3 | 0.9300 | C12—C13 | 1.383 (4) |
C4—C5 | 1.379 (5) | C12—H12 | 0.9300 |
C4—H4 | 0.9300 | C13—O1 | 1.369 (4) |
C5—C6 | 1.398 (4) | C13—C14 | 1.391 (4) |
C5—H5 | 0.9300 | C14—C15 | 1.381 (4) |
C6—C7 | 1.438 (4) | C14—H14 | 0.9300 |
C7—C8 | 1.347 (4) | C15—H15 | 0.9300 |
C7—C9 | 1.503 (4) | C16—O1 | 1.406 (5) |
C8—S1 | 1.734 (3) | C16—H16A | 0.9600 |
C8—H8 | 0.9300 | C16—H16B | 0.9600 |
C9—C10 | 1.504 (4) | C16—H16C | 0.9600 |
C2—C1—C6 | 121.9 (3) | C10—C9—H9B | 108.5 |
C2—C1—S1 | 127.2 (3) | H9A—C9—H9B | 107.5 |
C6—C1—S1 | 110.9 (2) | C15—C10—C11 | 117.3 (3) |
C3—C2—C1 | 117.6 (3) | C15—C10—C9 | 121.3 (3) |
C3—C2—H2 | 121.2 | C11—C10—C9 | 121.5 (3) |
C1—C2—H2 | 121.2 | C12—C11—C10 | 121.1 (3) |
C2—C3—C4 | 121.5 (3) | C12—C11—H11 | 119.4 |
C2—C3—H3 | 119.2 | C10—C11—H11 | 119.4 |
C4—C3—H3 | 119.2 | C11—C12—C13 | 120.7 (2) |
C5—C4—C3 | 120.6 (3) | C11—C12—H12 | 119.6 |
C5—C4—H4 | 119.7 | C13—C12—H12 | 119.6 |
C3—C4—H4 | 119.7 | O1—C13—C12 | 116.2 (2) |
C4—C5—C6 | 119.5 (3) | O1—C13—C14 | 124.9 (3) |
C4—C5—H5 | 120.2 | C12—C13—C14 | 118.9 (3) |
C6—C5—H5 | 120.2 | C15—C14—C13 | 119.3 (3) |
C5—C6—C1 | 118.9 (3) | C15—C14—H14 | 120.3 |
C5—C6—C7 | 128.2 (2) | C13—C14—H14 | 120.3 |
C1—C6—C7 | 112.9 (2) | C10—C15—C14 | 122.7 (3) |
C8—C7—C6 | 111.2 (2) | C10—C15—H15 | 118.7 |
C8—C7—C9 | 127.0 (3) | C14—C15—H15 | 118.7 |
C6—C7—C9 | 121.8 (2) | O1—C16—H16A | 109.5 |
C7—C8—S1 | 114.3 (2) | O1—C16—H16B | 109.5 |
C7—C8—H8 | 122.9 | H16A—C16—H16B | 109.5 |
S1—C8—H8 | 122.9 | O1—C16—H16C | 109.5 |
C7—C9—C10 | 114.9 (2) | H16A—C16—H16C | 109.5 |
C7—C9—H9A | 108.5 | H16B—C16—H16C | 109.5 |
C10—C9—H9A | 108.5 | C13—O1—C16 | 117.8 (3) |
C7—C9—H9B | 108.5 | C8—S1—C1 | 90.76 (14) |
C6—C1—C2—C3 | 1.6 (4) | C6—C7—C9—C10 | 176.5 (2) |
S1—C1—C2—C3 | −178.0 (2) | C7—C9—C10—C15 | −71.9 (4) |
C1—C2—C3—C4 | −0.3 (5) | C7—C9—C10—C11 | 108.3 (3) |
C2—C3—C4—C5 | −0.9 (5) | C15—C10—C11—C12 | −0.6 (4) |
C3—C4—C5—C6 | 0.8 (5) | C9—C10—C11—C12 | 179.2 (3) |
C4—C5—C6—C1 | 0.5 (4) | C10—C11—C12—C13 | 1.7 (4) |
C4—C5—C6—C7 | 179.1 (3) | C11—C12—C13—O1 | 179.0 (3) |
C2—C1—C6—C5 | −1.7 (4) | C11—C12—C13—C14 | −1.9 (4) |
S1—C1—C6—C5 | 177.95 (19) | O1—C13—C14—C15 | −179.9 (3) |
C2—C1—C6—C7 | 179.4 (3) | C12—C13—C14—C15 | 1.1 (4) |
S1—C1—C6—C7 | −0.9 (3) | C11—C10—C15—C14 | −0.3 (5) |
C5—C6—C7—C8 | −178.0 (3) | C9—C10—C15—C14 | 179.9 (3) |
C1—C6—C7—C8 | 0.8 (3) | C13—C14—C15—C10 | 0.0 (5) |
C5—C6—C7—C9 | 1.7 (4) | C12—C13—O1—C16 | 176.7 (3) |
C1—C6—C7—C9 | −179.6 (2) | C14—C13—O1—C16 | −2.4 (5) |
C6—C7—C8—S1 | −0.3 (3) | C7—C8—S1—C1 | −0.2 (2) |
C9—C7—C8—S1 | −179.9 (2) | C2—C1—S1—C8 | −179.7 (3) |
C8—C7—C9—C10 | −3.9 (4) | C6—C1—S1—C8 | 0.6 (2) |
Cg1 is the centroid of the C1–C6 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C14—H14···Cgi | 0.93 | 2.83 | 3.617 (2) | 143 |
Symmetry code: (i) x−1, y, z−1. |
Experimental details
Crystal data | |
Chemical formula | C16H14OS |
Mr | 254.33 |
Crystal system, space group | Monoclinic, Pc |
Temperature (K) | 295 |
a, b, c (Å) | 8.0158 (6), 10.8230 (9), 8.1219 (6) |
β (°) | 112.563 (4) |
V (Å3) | 650.68 (9) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.23 |
Crystal size (mm) | 0.25 × 0.20 × 0.20 |
Data collection | |
Diffractometer | Bruker SMART APEXII CCD |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.946, 0.954 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 6033, 2946, 2721 |
Rint | 0.171 |
(sin θ/λ)max (Å−1) | 0.667 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.066, 0.176, 1.06 |
No. of reflections | 2946 |
No. of parameters | 164 |
No. of restraints | 2 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.35, −0.48 |
Absolute structure | Flack (1983), 1337 Friedel pairs |
Absolute structure parameter | −0.04 (11) |
Computer programs: APEX2 (Bruker, 2004), SAINT (Bruker, 2004), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2009).
Cg1 is the centroid of the C1–C6 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C14—H14···Cgi | 0.93 | 2.83 | 3.617 (2) | 143 |
Symmetry code: (i) x−1, y, z−1. |
Acknowledgements
BG thanks AMET University management, India, for their kind support.
References
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Thiophene derivatives exhibit anti-HIV PR inhibitors (Bonini et al., 2005) and anti-breast cancer (Brault et al., 2005) activities. In addition, some of the benzo[b]thiophene derivatives shows significant antimicrobial and anti-inflammatory activities (Isloora et al., 2010).
The geometric parameters of the title molecule (Fig. 1) agree well with reported similar structures (Gunasekaran et al., 2009; Umadevi et al., 2009). The dihedral angle between the two benzene rings is 71.93 (8)°. The C1—S1 and C8—S1 bond distances are 1.738 (3) and 1.734 (3) Å respectively, which are comparable to the literature value of 1.712 (2) Å (Allen et al., 1987).
The crystal packing is stabilized by a weak C—H···π interaction [C14—H14···Cg (-1+x, y, -1+z), Table 1; Cg is the centroid of the ring defined by the atoms C1—C6] .