Related literature
The crystal structure of 2-methyl-3-(methylsulfinyl)naphtho[1,2-b]furan has been reported by Choi et al. (2006).
Experimental
Crystal data
C19H14O3S Mr = 322.36 Orthorhombic, P n a 21 a = 8.198 (4) Å b = 18.589 (8) Å c = 10.049 (4) Å V = 1531.4 (11) Å3 Z = 4 Mo Kα radiation μ = 0.22 mm−1 T = 173 (2) K 0.40 × 0.30 × 0.20 mm
|
Data collection
Bruker SMART CCD diffractometer Absorption correction: none 8102 measured reflections 2714 independent reflections 2538 reflections with I > 2σ(I) Rint = 0.048
|
Refinement
R[F2 > 2σ(F2)] = 0.031 wR(F2) = 0.083 S = 1.05 2714 reflections 208 parameters 1 restraint H-atom parameters constrained Δρmax = 0.26 e Å−3 Δρmin = −0.21 e Å−3 Absolute structure: Flack (1983), 1125 Friedel pairs Flack parameter: 0.04 (7)
|
Cg2⋯Cg3i | 3.616 (4) | Symmetry code: (i) . | |
D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A | C13—H13A⋯Cg1i | 0.98 | 2.64 | 3.483 (3) | 144 | C8—H8⋯O3ii | 0.95 | 2.51 | 3.406 (3) | 157 | C16—H16⋯O3iii | 0.95 | 2.51 | 3.430 (3) | 164 | Symmetry codes: (i) ; (ii) ; (iii) x-1, y, z. | |
Data collection: SMART (Bruker, 1997); cell refinement: SAINT (Bruker, 1997); 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
3-Chloroperbenzoic acid (77%, 560 mg, 2.5 mmol) was added in small portions to a stirred solution of 2-methyl-3-(phenylsulfanyl)naphtho[1,2-b] furan (348 mg, 1.2 mmol) in dichloromethane (40 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 in vacuum. The residue was purified by column chromatography (hexane-ethyl acetate, 2:1 v/v) to afford the title compound as a pale yellow solid [yield 84%, m.p. 412–413 K; Rf = 0.64 (hexane-ethyl acetate, 2:1 v/v)]. Single crystals suitable for X-ray diffraction were prepared by slow evaporation of a dilute 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 aromatic H atoms and 0.98 Å for methyl H atoms, respectively, and with Uiso(H) = 1.2Ueq(C) for all H atoms.
Data collection: SMART (Bruker, 1997); cell refinement: SAINT (Bruker, 1997); data reduction: SAINT (Bruker, 1997); 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).
2-Methyl-3-(phenylsulfonyl)naphtho[1,2-
b]furan
top Crystal data top C19H14O3S | F(000) = 672 |
Mr = 322.36 | Dx = 1.398 Mg m−3 |
Orthorhombic, Pna21 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2c -2n | Cell parameters from 5173 reflections |
a = 8.198 (4) Å | θ = 2.2–28.1° |
b = 18.589 (8) Å | µ = 0.22 mm−1 |
c = 10.049 (4) Å | T = 173 K |
V = 1531.4 (11) Å3 | Block, yellow |
Z = 4 | 0.40 × 0.30 × 0.20 mm |
Data collection top Bruker SMART CCD diffractometer | 2538 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.048 |
Graphite monochromator | θmax = 26.0°, θmin = 2.2° |
Detector resolution: 10.0 pixels mm-1 | h = −7→10 |
ϕ and ω scans | k = −22→22 |
8102 measured reflections | l = −12→11 |
2714 independent reflections | |
Refinement top 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)] = 0.031 | H-atom parameters constrained |
wR(F2) = 0.083 | w = 1/[σ2(Fo2) + (0.0507P)2 + 0.1234P] where P = (Fo2 + 2Fc2)/3 |
S = 1.05 | (Δ/σ)max < 0.001 |
2714 reflections | Δρmax = 0.26 e Å−3 |
208 parameters | Δρmin = −0.21 e Å−3 |
1 restraint | Absolute structure: Flack (1983), 1125 Friedel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: 0.04 (7) |
Crystal data top C19H14O3S | V = 1531.4 (11) Å3 |
Mr = 322.36 | Z = 4 |
Orthorhombic, Pna21 | Mo Kα radiation |
a = 8.198 (4) Å | µ = 0.22 mm−1 |
b = 18.589 (8) Å | T = 173 K |
c = 10.049 (4) Å | 0.40 × 0.30 × 0.20 mm |
Data collection top Bruker SMART CCD diffractometer | 2538 reflections with I > 2σ(I) |
8102 measured reflections | Rint = 0.048 |
2714 independent reflections | |
Refinement top R[F2 > 2σ(F2)] = 0.031 | H-atom parameters constrained |
wR(F2) = 0.083 | Δρmax = 0.26 e Å−3 |
S = 1.05 | Δρmin = −0.21 e Å−3 |
2714 reflections | Absolute structure: Flack (1983), 1125 Friedel pairs |
208 parameters | Absolute structure parameter: 0.04 (7) |
1 restraint | |
Special details top Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s 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 > σ(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 | x | y | z | Uiso*/Ueq | |
S1 | 0.44268 (6) | 0.07870 (2) | 0.60161 (6) | 0.02617 (13) | |
O1 | 0.51082 (18) | 0.27348 (7) | 0.46110 (15) | 0.0291 (3) | |
O2 | 0.3904 (2) | 0.09804 (9) | 0.73361 (15) | 0.0373 (4) | |
O3 | 0.58124 (17) | 0.03221 (8) | 0.58544 (17) | 0.0369 (4) | |
C1 | 0.4858 (2) | 0.15710 (10) | 0.5141 (2) | 0.0253 (4) | |
C2 | 0.5822 (2) | 0.16115 (11) | 0.3939 (2) | 0.0260 (4) | |
C3 | 0.6620 (3) | 0.11149 (11) | 0.3089 (2) | 0.0293 (4) | |
H3 | 0.6565 | 0.0612 | 0.3254 | 0.035* | |
C4 | 0.7466 (3) | 0.13772 (11) | 0.2031 (2) | 0.0314 (5) | |
H4 | 0.8012 | 0.1048 | 0.1460 | 0.038* | |
C5 | 0.7564 (3) | 0.21297 (11) | 0.1745 (2) | 0.0296 (4) | |
C6 | 0.8432 (3) | 0.23949 (14) | 0.0629 (2) | 0.0379 (5) | |
H6 | 0.8960 | 0.2067 | 0.0045 | 0.045* | |
C7 | 0.8521 (3) | 0.31235 (14) | 0.0381 (3) | 0.0448 (6) | |
H7 | 0.9111 | 0.3293 | −0.0370 | 0.054* | |
C8 | 0.7749 (3) | 0.36149 (12) | 0.1225 (3) | 0.0421 (6) | |
H8 | 0.7828 | 0.4115 | 0.1042 | 0.051* | |
C9 | 0.6884 (3) | 0.33880 (11) | 0.2309 (2) | 0.0342 (5) | |
H9 | 0.6355 | 0.3726 | 0.2872 | 0.041* | |
C10 | 0.6786 (3) | 0.26389 (11) | 0.2582 (2) | 0.0276 (4) | |
C11 | 0.5932 (2) | 0.23396 (10) | 0.3665 (2) | 0.0270 (4) | |
C12 | 0.4468 (2) | 0.22595 (11) | 0.5500 (2) | 0.0282 (4) | |
C13 | 0.3579 (3) | 0.25867 (13) | 0.6634 (2) | 0.0375 (5) | |
H13A | 0.2672 | 0.2878 | 0.6297 | 0.045* | |
H13B | 0.4325 | 0.2893 | 0.7143 | 0.045* | |
H13C | 0.3154 | 0.2206 | 0.7211 | 0.045* | |
C14 | 0.2753 (2) | 0.03853 (10) | 0.51984 (19) | 0.0249 (4) | |
C15 | 0.1181 (3) | 0.05753 (12) | 0.5593 (2) | 0.0312 (5) | |
H15 | 0.1021 | 0.0928 | 0.6265 | 0.037* | |
C16 | −0.0141 (3) | 0.02474 (14) | 0.5000 (2) | 0.0404 (5) | |
H16 | −0.1217 | 0.0368 | 0.5272 | 0.048* | |
C17 | 0.0105 (3) | −0.02571 (14) | 0.4009 (3) | 0.0469 (6) | |
H17 | −0.0805 | −0.0486 | 0.3604 | 0.056* | |
C18 | 0.1664 (3) | −0.04291 (13) | 0.3605 (3) | 0.0447 (6) | |
H18 | 0.1818 | −0.0767 | 0.2908 | 0.054* | |
C19 | 0.3008 (3) | −0.01150 (11) | 0.4204 (2) | 0.0327 (5) | |
H19 | 0.4082 | −0.0241 | 0.3937 | 0.039* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
S1 | 0.0274 (2) | 0.0262 (2) | 0.0250 (2) | −0.00075 (19) | −0.0024 (2) | 0.0041 (2) |
O1 | 0.0359 (8) | 0.0213 (6) | 0.0301 (8) | 0.0009 (6) | 0.0004 (6) | −0.0021 (6) |
O2 | 0.0459 (9) | 0.0419 (8) | 0.0241 (8) | −0.0059 (8) | −0.0011 (7) | 0.0014 (7) |
O3 | 0.0300 (8) | 0.0329 (7) | 0.0477 (11) | 0.0043 (6) | −0.0026 (7) | 0.0125 (8) |
C1 | 0.0254 (9) | 0.0224 (9) | 0.0282 (11) | −0.0009 (8) | −0.0043 (8) | 0.0008 (8) |
C2 | 0.0254 (10) | 0.0265 (10) | 0.0261 (10) | −0.0022 (8) | −0.0030 (8) | 0.0021 (8) |
C3 | 0.0337 (11) | 0.0226 (9) | 0.0317 (11) | −0.0016 (9) | −0.0024 (9) | −0.0003 (8) |
C4 | 0.0356 (12) | 0.0298 (10) | 0.0290 (11) | 0.0004 (9) | 0.0012 (9) | −0.0030 (9) |
C5 | 0.0321 (11) | 0.0337 (11) | 0.0229 (10) | −0.0027 (9) | −0.0040 (8) | 0.0025 (9) |
C6 | 0.0411 (13) | 0.0454 (14) | 0.0271 (12) | −0.0046 (11) | −0.0001 (9) | 0.0043 (9) |
C7 | 0.0469 (14) | 0.0538 (15) | 0.0337 (13) | −0.0117 (12) | −0.0025 (11) | 0.0163 (11) |
C8 | 0.0503 (14) | 0.0320 (11) | 0.0441 (15) | −0.0122 (10) | −0.0105 (11) | 0.0122 (11) |
C9 | 0.0381 (12) | 0.0278 (10) | 0.0366 (13) | −0.0050 (9) | −0.0084 (9) | 0.0021 (9) |
C10 | 0.0295 (11) | 0.0272 (10) | 0.0260 (10) | −0.0050 (8) | −0.0080 (8) | 0.0046 (8) |
C11 | 0.0287 (10) | 0.0237 (10) | 0.0286 (11) | −0.0013 (8) | −0.0042 (8) | −0.0021 (9) |
C12 | 0.0280 (10) | 0.0273 (10) | 0.0294 (10) | −0.0001 (9) | −0.0032 (8) | −0.0012 (8) |
C13 | 0.0426 (14) | 0.0349 (12) | 0.0349 (12) | 0.0055 (10) | 0.0026 (10) | −0.0042 (10) |
C14 | 0.0282 (10) | 0.0235 (9) | 0.0229 (11) | −0.0014 (8) | 0.0004 (8) | 0.0052 (8) |
C15 | 0.0327 (11) | 0.0338 (10) | 0.0271 (11) | 0.0014 (10) | 0.0036 (8) | 0.0036 (8) |
C16 | 0.0297 (11) | 0.0534 (14) | 0.0380 (14) | −0.0038 (11) | 0.0007 (10) | 0.0068 (11) |
C17 | 0.0412 (14) | 0.0608 (16) | 0.0386 (14) | −0.0207 (13) | −0.0045 (11) | 0.0009 (12) |
C18 | 0.0576 (15) | 0.0430 (13) | 0.0335 (13) | −0.0117 (12) | 0.0037 (11) | −0.0098 (11) |
C19 | 0.0354 (12) | 0.0311 (11) | 0.0316 (11) | −0.0021 (9) | 0.0058 (9) | −0.0032 (9) |
Geometric parameters (Å, º) top S1—O3 | 1.437 (2) | C8—C9 | 1.367 (3) |
S1—O2 | 1.440 (2) | C8—H8 | 0.9500 |
S1—C1 | 1.738 (2) | C9—C10 | 1.422 (3) |
S1—C14 | 1.765 (2) | C9—H9 | 0.9500 |
O1—C12 | 1.361 (3) | C10—C11 | 1.409 (3) |
O1—C11 | 1.378 (2) | C12—C13 | 1.483 (3) |
C1—C12 | 1.368 (3) | C13—H13A | 0.9800 |
C1—C2 | 1.446 (3) | C13—H13B | 0.9800 |
C2—C11 | 1.384 (3) | C13—H13C | 0.9800 |
C2—C3 | 1.418 (3) | C14—C19 | 1.381 (3) |
C3—C4 | 1.360 (3) | C14—C15 | 1.394 (3) |
C3—H3 | 0.9500 | C15—C16 | 1.378 (3) |
C4—C5 | 1.430 (3) | C15—H15 | 0.9500 |
C4—H4 | 0.9500 | C16—C17 | 1.383 (4) |
C5—C6 | 1.417 (3) | C16—H16 | 0.9500 |
C5—C10 | 1.417 (3) | C17—C18 | 1.379 (4) |
C6—C7 | 1.379 (4) | C17—H17 | 0.9500 |
C6—H6 | 0.9500 | C18—C19 | 1.384 (3) |
C7—C8 | 1.398 (4) | C18—H18 | 0.9500 |
C7—H7 | 0.9500 | C19—H19 | 0.9500 |
| | | |
Cg2···Cg3i | 3.616 (4) | | |
| | | |
O3—S1—O2 | 119.3 (1) | C11—C10—C5 | 114.7 (2) |
O3—S1—C1 | 106.6 (1) | C11—C10—C9 | 124.3 (2) |
O2—S1—C1 | 108.5 (1) | C5—C10—C9 | 121.0 (2) |
O3—S1—C14 | 107.9 (1) | O1—C11—C2 | 110.6 (2) |
O2—S1—C14 | 107.7 (1) | O1—C11—C10 | 124.5 (2) |
C1—S1—C14 | 106.1 (1) | C2—C11—C10 | 124.9 (2) |
C12—O1—C11 | 107.2 (2) | O1—C12—C1 | 110.2 (2) |
C12—C1—C2 | 107.4 (2) | O1—C12—C13 | 115.3 (2) |
C12—C1—S1 | 127.1 (2) | C1—C12—C13 | 134.5 (2) |
C2—C1—S1 | 125.3 (2) | C12—C13—H13A | 109.5 |
C11—C2—C3 | 119.1 (2) | C12—C13—H13B | 109.5 |
C11—C2—C1 | 104.6 (2) | H13A—C13—H13B | 109.5 |
C3—C2—C1 | 136.2 (2) | C12—C13—H13C | 109.5 |
C4—C3—C2 | 118.2 (2) | H13A—C13—H13C | 109.5 |
C4—C3—H3 | 120.9 | H13B—C13—H13C | 109.5 |
C2—C3—H3 | 120.9 | C19—C14—C15 | 121.1 (2) |
C3—C4—C5 | 122.4 (2) | C19—C14—S1 | 120.3 (2) |
C3—C4—H4 | 118.8 | C15—C14—S1 | 118.6 (2) |
C5—C4—H4 | 118.8 | C16—C15—C14 | 119.4 (2) |
C6—C5—C10 | 117.6 (2) | C16—C15—H15 | 120.3 |
C6—C5—C4 | 121.8 (2) | C14—C15—H15 | 120.3 |
C10—C5—C4 | 120.6 (2) | C15—C16—C17 | 119.8 (2) |
C7—C6—C5 | 120.8 (2) | C15—C16—H16 | 120.1 |
C7—C6—H6 | 119.6 | C17—C16—H16 | 120.1 |
C5—C6—H6 | 119.6 | C18—C17—C16 | 120.3 (2) |
C6—C7—C8 | 120.5 (2) | C18—C17—H17 | 119.9 |
C6—C7—H7 | 119.7 | C16—C17—H17 | 119.9 |
C8—C7—H7 | 119.7 | C17—C18—C19 | 120.8 (2) |
C9—C8—C7 | 121.1 (2) | C17—C18—H18 | 119.6 |
C9—C8—H8 | 119.4 | C19—C18—H18 | 119.6 |
C7—C8—H8 | 119.4 | C14—C19—C18 | 118.5 (2) |
C8—C9—C10 | 119.0 (2) | C14—C19—H19 | 120.7 |
C8—C9—H9 | 120.5 | C18—C19—H19 | 120.7 |
C10—C9—H9 | 120.5 | | |
| | | |
O3—S1—C1—C12 | −142.38 (19) | C3—C2—C11—O1 | −178.86 (17) |
O2—S1—C1—C12 | −12.7 (2) | C1—C2—C11—O1 | 0.0 (2) |
C14—S1—C1—C12 | 102.8 (2) | C3—C2—C11—C10 | 0.2 (3) |
O3—S1—C1—C2 | 32.34 (19) | C1—C2—C11—C10 | 179.12 (19) |
O2—S1—C1—C2 | 162.06 (16) | C5—C10—C11—O1 | 179.07 (18) |
C14—S1—C1—C2 | −82.51 (18) | C9—C10—C11—O1 | −1.2 (3) |
C12—C1—C2—C11 | −0.1 (2) | C5—C10—C11—C2 | 0.1 (3) |
S1—C1—C2—C11 | −175.74 (15) | C9—C10—C11—C2 | 179.8 (2) |
C12—C1—C2—C3 | 178.5 (2) | C11—O1—C12—C1 | −0.2 (2) |
S1—C1—C2—C3 | 2.9 (3) | C11—O1—C12—C13 | 177.78 (17) |
C11—C2—C3—C4 | 0.0 (3) | C2—C1—C12—O1 | 0.2 (2) |
C1—C2—C3—C4 | −178.5 (2) | S1—C1—C12—O1 | 175.70 (14) |
C2—C3—C4—C5 | −0.5 (3) | C2—C1—C12—C13 | −177.2 (2) |
C3—C4—C5—C6 | −179.2 (2) | S1—C1—C12—C13 | −1.7 (4) |
C3—C4—C5—C10 | 0.9 (3) | O3—S1—C14—C19 | −22.04 (19) |
C10—C5—C6—C7 | 0.5 (3) | O2—S1—C14—C19 | −152.05 (17) |
C4—C5—C6—C7 | −179.5 (2) | C1—S1—C14—C19 | 91.94 (18) |
C5—C6—C7—C8 | −0.2 (4) | O3—S1—C14—C15 | 156.92 (16) |
C6—C7—C8—C9 | −0.4 (4) | O2—S1—C14—C15 | 26.90 (19) |
C7—C8—C9—C10 | 0.6 (3) | C1—S1—C14—C15 | −89.10 (18) |
C6—C5—C10—C11 | 179.43 (18) | C19—C14—C15—C16 | 1.4 (3) |
C4—C5—C10—C11 | −0.6 (3) | S1—C14—C15—C16 | −177.59 (17) |
C6—C5—C10—C9 | −0.3 (3) | C14—C15—C16—C17 | −1.0 (3) |
C4—C5—C10—C9 | 179.69 (19) | C15—C16—C17—C18 | −0.5 (4) |
C8—C9—C10—C11 | −179.9 (2) | C16—C17—C18—C19 | 1.6 (4) |
C8—C9—C10—C5 | −0.3 (3) | C15—C14—C19—C18 | −0.2 (3) |
C12—O1—C11—C2 | 0.1 (2) | S1—C14—C19—C18 | 178.69 (18) |
C12—O1—C11—C10 | −178.99 (19) | C17—C18—C19—C14 | −1.2 (4) |
Symmetry code: (i) x−1/2, −y+1/2, z. |
Hydrogen-bond geometry (Å, º) top D—H···A | D—H | H···A | D···A | D—H···A |
C13—H13A···Cg1i | 0.98 | 2.64 | 3.483 (3) | 144 |
C8—H8···O3ii | 0.95 | 2.51 | 3.406 (3) | 157 |
C16—H16···O3iii | 0.95 | 2.51 | 3.430 (3) | 164 |
Symmetry codes: (i) x−1/2, −y+1/2, z; (ii) −x+3/2, y+1/2, z−1/2; (iii) x−1, y, z. |
Experimental details
Crystal data |
Chemical formula | C19H14O3S |
Mr | 322.36 |
Crystal system, space group | Orthorhombic, Pna21 |
Temperature (K) | 173 |
a, b, c (Å) | 8.198 (4), 18.589 (8), 10.049 (4) |
V (Å3) | 1531.4 (11) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.22 |
Crystal size (mm) | 0.40 × 0.30 × 0.20 |
|
Data collection |
Diffractometer | Bruker SMART CCD diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8102, 2714, 2538 |
Rint | 0.048 |
(sin θ/λ)max (Å−1) | 0.616 |
|
Refinement |
R[F2 > 2σ(F2)], wR(F2), S | 0.031, 0.083, 1.05 |
No. of reflections | 2714 |
No. of parameters | 208 |
No. of restraints | 1 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.26, −0.21 |
Absolute structure | Flack (1983), 1125 Friedel pairs |
Absolute structure parameter | 0.04 (7) |
Selected interatomic distances (Å) topSymmetry code: (i) x−1/2, −y+1/2, z. |
Hydrogen-bond geometry (Å, º) top D—H···A | D—H | H···A | D···A | D—H···A |
C13—H13A···Cg1i | 0.98 | 2.64 | 3.483 (3) | 143.8 |
C8—H8···O3ii | 0.95 | 2.51 | 3.406 (3) | 156.7 |
C16—H16···O3iii | 0.95 | 2.51 | 3.430 (3) | 164.0 |
Symmetry codes: (i) x−1/2, −y+1/2, z; (ii) −x+3/2, y+1/2, z−1/2; (iii) x−1, y, z. |
References
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| CRYSTALLOGRAPHIC COMMUNICATIONS |
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As part of our ongoing study of 2-methylnaphtho[1,2-b]furan derivatives, the crystal structure of 2-methyl-3-(methylsulfinyl)naphtho[1,2-b]furan has been recently reported (Choi et al., 2006). Herein we present the molecular and crystal structure of the title compound, (I).
In (I) (Fig. 1), the naphthofuran unit is essentially planar, with a mean deviation of 0.007 Å from the least-squares plane defined by the thirteen constituent atoms. The crystal packing (Fig. 2) is stabilized by aromatic π—π stacking interactions between adjacent benzene rings. The Cg2···Cg3i distance is 3.616 (4) Å (Table 1; Cg2 and Cg3 are the centroids of the C2—C5/C10/C11 benzene ring and the C5—C10 benzene ring, respectively, symmetry code as in Fig. 2). The molecular packing is further stabilized by CH2—H···π interactions between the methyl group and the furan ring of the naphthofuran unit, with a C13—H13A···Cg1i separation of 2.64 Å (Fig. 2 and Table 2; Cg1 is the centroid of the O1/C12/C1/C2/C11 furan ring; symmetry code as in Fig. 2). Additionally, the weak hydrogen bonds were observed; one between the benzene H atom of naphthofuran unit and the O atom of sulfonyl group, with a C8—H8···O3ii, a second between the benzene H atom of phenylsulfonyl group and adjacent O atom of sulfonyl group, with a C16—H16···O3iii (Fig. 2 and Table 2; symmetry code as in Fig. 2).