organic compounds
1-(2-Fluorophenyl)-3-(3,4,5-trimethoxybenzoyl)thiourea
aDepartment of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan, and bDepartment Chemie, Fakultät für Naturwissenschaften, Universität Paderborn, Warburgerstrasse 100, D-33098 Paderborn, Germany
*Correspondence e-mail: aamersaeed@yahoo.com
The two m-methoxy groups of the title compound, C17H17FN2O4S, are almost coplanar with the aromatic ring [CH3—O—C—C = 5.8 (1) and 5.9 (1)°], whereas the methoxy group in the para position is bent out of the ring plane [78.6 (1)°]. Molecules are connected by intermolecular N—H⋯S hydrogen bonds to form centrosymmetric dimers that are stacked along the a axis.
Related literature
For details of the biological activity of fluorinated thioureas, see: Sun et al. (2006); Saeed et al. (2009); Xu et al. (2003). For the use of fluorinated thioureas in organic synthesis, see: Nosova et al. (2006, 2007); Berkessel et al. (2006). For fluorine-containing heterocycles, see: Lipunova et al. (2008). For intramolecular hydrogen bonds and Fermi resonance measurements, see: Hritzová & Koščík (2008).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2002); cell SAINT (Bruker, 2002); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S160053681001408X/si2257sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S160053681001408X/si2257Isup2.hkl
3,4,5-Trimethoxybenzoylisothiocyante (1 mmol) in acetone w as treated with 2-fluoroaniline (1 mmol) under a nitrogen atmosphere at reflux for 2.5 h. Upon cooling, the reaction mixture was poured into aq HCl and the precipitated product was rerystallized from in methanol to afforded the title compound (86 %) as colourless crystals: Anal. calcd. for C17H17N2O4F2S: C, 56.03; H, 4.70; N, 7.69; S, 8.80%; found: C, 56.12; H, 4.76; N, 7.71; S, 8.76%.
Hydrogen atoms were clearly identified in difference Fourier syntheses, idealized and refined at calculated positions riding on the carbon atoms with isotropic displacement parameters Uiso(H) = 1.2Ueq(C/N) or 1.5Ueq(-CH3). All methyl H atoms were allowed to rotate but not to tip.
Fluorinated thioureas are convenient synthons for preparation of versatile fluorine-containing heterocycles: [1,3]-benzothiazin-4-ones (Nosova et al.,2006, 2007). 1-aryl-2-ethylthio-quinazolin-4-one, thiazolidine and 1H-1,2,4-triazoles (Lipunova et al., 2008). These constitute a novel class of potent influenza virus neuraminidase inhibitors (Sun et al., 2006). Fluorinated bis-thiourea derivatives are used as organocatalyst in Morita-Baylis-Hillman reaction (Berkessel et al., 2006). N-Substituted N'-(2-fluorobenzoyl)thiourea derivatives are suitable substrates for studying Intramolecular Hydrogen Bonds and Fermi Resonance (Hritzová & Koščík 2008). Fluorinated thioureas have shown potent microbial (Saeed et al., 2009) and insecticidal activities (Xu et al., 2003). The two m-methoxy groups of the title compound, (Fig. 1), C17H17FN2O4S, are almost coplanar with the aromatic ring [CH3—O—C—C 5.8 (1)° and 5.9 (1)°] whereas the methoxygroup in para position is bent out of the ring plane [78.6 (1)°]. The molecules are connected by intermolecular N—H···S hydrogen bonds (Table 1) to centrosymmetric dimers that are stacked along the a axis (Fig. 2).
For details of the biological activity of fluorinated thioureas, see: Sun et al. (2006); Saeed et al. (2009); Xu et al. (2003). For the use of fluorinated thioureas in organic synthesis, see: Nosova et al. (2006, 2007); Berkessel et al. (2006). For fluorine-containing heterocycles, see: Lipunova et al. (2008). For intramolecular hydrogen bonds and Fermi resonance measurements, see: Hritzová & Koščík (2008).
Data collection: SMART (Bruker, 2002); cell
SAINT (Bruker, 2002); data reduction: SAINT (Bruker, 2002); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).C17H17FN2O4S | Z = 2 |
Mr = 364.39 | F(000) = 380 |
Triclinic, P1 | Dx = 1.484 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 4.0828 (5) Å | Cell parameters from 2067 reflections |
b = 14.0420 (16) Å | θ = 2.9–28.2° |
c = 14.2295 (16) Å | µ = 0.24 mm−1 |
α = 91.092 (2)° | T = 120 K |
β = 90.694 (2)° | Prism, colourless |
γ = 91.712 (2)° | 0.48 × 0.20 × 0.19 mm |
V = 815.21 (16) Å3 |
Bruker SMART APEX diffractometer | 3868 independent reflections |
Radiation source: sealed tube | 3128 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.027 |
φ and ω scans | θmax = 27.9°, θmin = 1.4° |
Absorption correction: multi-scan (SADABS; Bruker, 2002) | h = −5→5 |
Tmin = 0.896, Tmax = 0.957 | k = −18→18 |
7686 measured reflections | l = −17→18 |
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)] = 0.042 | Hydrogen site location: difference Fourier map |
wR(F2) = 0.109 | H-atom parameters constrained |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0485P)2 + 0.2731P] where P = (Fo2 + 2Fc2)/3 |
3868 reflections | (Δ/σ)max < 0.001 |
226 parameters | Δρmax = 0.36 e Å−3 |
0 restraints | Δρmin = −0.27 e Å−3 |
C17H17FN2O4S | γ = 91.712 (2)° |
Mr = 364.39 | V = 815.21 (16) Å3 |
Triclinic, P1 | Z = 2 |
a = 4.0828 (5) Å | Mo Kα radiation |
b = 14.0420 (16) Å | µ = 0.24 mm−1 |
c = 14.2295 (16) Å | T = 120 K |
α = 91.092 (2)° | 0.48 × 0.20 × 0.19 mm |
β = 90.694 (2)° |
Bruker SMART APEX diffractometer | 3868 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2002) | 3128 reflections with I > 2σ(I) |
Tmin = 0.896, Tmax = 0.957 | Rint = 0.027 |
7686 measured reflections |
R[F2 > 2σ(F2)] = 0.042 | 0 restraints |
wR(F2) = 0.109 | H-atom parameters constrained |
S = 1.03 | Δρmax = 0.36 e Å−3 |
3868 reflections | Δρmin = −0.27 e Å−3 |
226 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 > 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. |
x | y | z | Uiso*/Ueq | ||
S1 | 0.28840 (12) | 0.51052 (3) | 0.37700 (3) | 0.02191 (13) | |
F1 | 0.1367 (3) | 0.83707 (8) | 0.21822 (8) | 0.0346 (3) | |
O1 | 0.0156 (4) | 0.81511 (9) | 0.44315 (9) | 0.0287 (3) | |
O2 | −0.5433 (3) | 0.95757 (8) | 0.72291 (8) | 0.0239 (3) | |
O3 | −0.3506 (3) | 0.85284 (8) | 0.86784 (8) | 0.0220 (3) | |
O4 | 0.0054 (3) | 0.70067 (8) | 0.84415 (8) | 0.0228 (3) | |
N1 | 0.2791 (4) | 0.69556 (10) | 0.32920 (10) | 0.0220 (3) | |
H1A | 0.2360 | 0.7532 | 0.3500 | 0.026* | |
N2 | 0.0880 (4) | 0.65816 (10) | 0.47587 (10) | 0.0199 (3) | |
H2A | 0.0559 | 0.6148 | 0.5189 | 0.024* | |
C1 | 0.3979 (4) | 0.69150 (12) | 0.23660 (12) | 0.0199 (4) | |
C2 | 0.5894 (5) | 0.62118 (13) | 0.19798 (13) | 0.0264 (4) | |
H2B | 0.6512 | 0.5687 | 0.2347 | 0.032* | |
C3 | 0.6906 (5) | 0.62772 (13) | 0.10527 (14) | 0.0309 (5) | |
H3A | 0.8210 | 0.5792 | 0.0791 | 0.037* | |
C4 | 0.6043 (5) | 0.70389 (13) | 0.05025 (13) | 0.0279 (4) | |
H4A | 0.6729 | 0.7071 | −0.0132 | 0.033* | |
C5 | 0.4183 (5) | 0.77486 (13) | 0.08855 (13) | 0.0271 (4) | |
H5A | 0.3590 | 0.8279 | 0.0522 | 0.032* | |
C6 | 0.3206 (5) | 0.76752 (12) | 0.17987 (13) | 0.0232 (4) | |
C7 | 0.2210 (4) | 0.62634 (12) | 0.39079 (11) | 0.0176 (3) | |
C8 | 0.0018 (4) | 0.74974 (11) | 0.49981 (12) | 0.0190 (3) | |
C9 | −0.1053 (4) | 0.76904 (11) | 0.59750 (11) | 0.0174 (3) | |
C10 | −0.2858 (4) | 0.85088 (11) | 0.61089 (12) | 0.0189 (3) | |
H10A | −0.3518 | 0.8868 | 0.5584 | 0.023* | |
C11 | −0.3685 (4) | 0.87953 (11) | 0.70090 (12) | 0.0187 (3) | |
C12 | −0.2668 (4) | 0.82639 (11) | 0.77787 (11) | 0.0182 (3) | |
C13 | −0.0860 (4) | 0.74466 (11) | 0.76356 (11) | 0.0175 (3) | |
C14 | −0.0055 (4) | 0.71485 (11) | 0.67339 (12) | 0.0181 (3) | |
H14A | 0.1150 | 0.6588 | 0.6635 | 0.022* | |
C15 | −0.6232 (5) | 1.01977 (12) | 0.64767 (13) | 0.0262 (4) | |
H15A | −0.7484 | 1.0730 | 0.6723 | 0.039* | |
H15B | −0.7549 | 0.9843 | 0.5999 | 0.039* | |
H15C | −0.4210 | 1.0444 | 0.6194 | 0.039* | |
C16 | −0.1525 (5) | 0.93050 (14) | 0.90583 (13) | 0.0296 (4) | |
H16A | −0.2241 | 0.9460 | 0.9697 | 0.044* | |
H16B | −0.1753 | 0.9863 | 0.8662 | 0.044* | |
H16C | 0.0774 | 0.9124 | 0.9077 | 0.044* | |
C17 | 0.1706 (5) | 0.61312 (12) | 0.83456 (13) | 0.0247 (4) | |
H17B | 0.2231 | 0.5891 | 0.8970 | 0.037* | |
H17C | 0.3735 | 0.6237 | 0.7996 | 0.037* | |
H17D | 0.0289 | 0.5663 | 0.8004 | 0.037* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0321 (3) | 0.0160 (2) | 0.0179 (2) | 0.00099 (17) | 0.00664 (18) | 0.00108 (16) |
F1 | 0.0514 (8) | 0.0262 (6) | 0.0278 (6) | 0.0146 (5) | 0.0146 (5) | 0.0083 (5) |
O1 | 0.0488 (9) | 0.0200 (6) | 0.0181 (6) | 0.0067 (6) | 0.0106 (6) | 0.0048 (5) |
O2 | 0.0307 (7) | 0.0210 (6) | 0.0207 (6) | 0.0083 (5) | 0.0058 (5) | 0.0027 (5) |
O3 | 0.0309 (7) | 0.0197 (6) | 0.0152 (6) | −0.0016 (5) | 0.0066 (5) | −0.0027 (5) |
O4 | 0.0358 (8) | 0.0189 (6) | 0.0139 (6) | 0.0060 (5) | 0.0014 (5) | 0.0024 (5) |
N1 | 0.0360 (9) | 0.0155 (7) | 0.0147 (7) | 0.0027 (6) | 0.0068 (6) | 0.0006 (5) |
N2 | 0.0310 (9) | 0.0165 (7) | 0.0123 (7) | 0.0005 (6) | 0.0037 (6) | 0.0016 (5) |
C1 | 0.0266 (10) | 0.0195 (8) | 0.0135 (8) | −0.0010 (7) | 0.0035 (7) | 0.0018 (6) |
C2 | 0.0348 (11) | 0.0218 (9) | 0.0233 (9) | 0.0045 (8) | 0.0084 (8) | 0.0050 (7) |
C3 | 0.0431 (12) | 0.0252 (9) | 0.0250 (10) | 0.0035 (8) | 0.0141 (9) | −0.0003 (8) |
C4 | 0.0388 (12) | 0.0298 (10) | 0.0150 (8) | −0.0035 (8) | 0.0076 (8) | 0.0017 (7) |
C5 | 0.0339 (11) | 0.0277 (9) | 0.0199 (9) | −0.0004 (8) | 0.0022 (8) | 0.0091 (7) |
C6 | 0.0281 (10) | 0.0208 (8) | 0.0209 (9) | 0.0028 (7) | 0.0047 (7) | 0.0004 (7) |
C7 | 0.0211 (9) | 0.0196 (8) | 0.0122 (8) | −0.0004 (6) | 0.0017 (6) | −0.0002 (6) |
C8 | 0.0241 (9) | 0.0174 (8) | 0.0156 (8) | 0.0001 (6) | 0.0023 (7) | 0.0007 (6) |
C9 | 0.0215 (9) | 0.0160 (7) | 0.0146 (8) | −0.0031 (6) | 0.0038 (7) | −0.0019 (6) |
C10 | 0.0228 (9) | 0.0175 (8) | 0.0167 (8) | −0.0003 (6) | 0.0027 (7) | 0.0036 (6) |
C11 | 0.0201 (9) | 0.0159 (8) | 0.0202 (8) | −0.0004 (6) | 0.0033 (7) | 0.0000 (6) |
C12 | 0.0233 (9) | 0.0167 (8) | 0.0146 (8) | −0.0024 (6) | 0.0046 (7) | −0.0016 (6) |
C13 | 0.0221 (9) | 0.0150 (7) | 0.0153 (8) | −0.0024 (6) | 0.0004 (7) | 0.0032 (6) |
C14 | 0.0224 (9) | 0.0141 (7) | 0.0176 (8) | −0.0008 (6) | 0.0029 (7) | −0.0002 (6) |
C15 | 0.0312 (11) | 0.0219 (9) | 0.0260 (10) | 0.0063 (7) | 0.0017 (8) | 0.0053 (7) |
C16 | 0.0355 (11) | 0.0311 (10) | 0.0216 (9) | −0.0034 (8) | 0.0032 (8) | −0.0087 (8) |
C17 | 0.0320 (10) | 0.0207 (8) | 0.0217 (9) | 0.0059 (7) | −0.0006 (8) | 0.0031 (7) |
S1—C7 | 1.6659 (17) | C4—H4A | 0.9500 |
F1—C6 | 1.360 (2) | C5—C6 | 1.369 (2) |
O1—C8 | 1.2337 (19) | C5—H5A | 0.9500 |
O2—C11 | 1.359 (2) | C8—C9 | 1.485 (2) |
O2—C15 | 1.435 (2) | C9—C10 | 1.395 (2) |
O3—C12 | 1.3763 (19) | C9—C14 | 1.397 (2) |
O3—C16 | 1.432 (2) | C10—C11 | 1.384 (2) |
O4—C13 | 1.3660 (19) | C10—H10A | 0.9500 |
O4—C17 | 1.425 (2) | C11—C12 | 1.403 (2) |
N1—C7 | 1.339 (2) | C12—C13 | 1.396 (2) |
N1—C1 | 1.410 (2) | C13—C14 | 1.388 (2) |
N1—H1A | 0.8800 | C14—H14A | 0.9500 |
N2—C8 | 1.381 (2) | C15—H15A | 0.9800 |
N2—C7 | 1.404 (2) | C15—H15B | 0.9800 |
N2—H2A | 0.8800 | C15—H15C | 0.9800 |
C1—C2 | 1.387 (2) | C16—H16A | 0.9800 |
C1—C6 | 1.392 (2) | C16—H16B | 0.9800 |
C2—C3 | 1.391 (3) | C16—H16C | 0.9800 |
C2—H2B | 0.9500 | C17—H17B | 0.9800 |
C3—C4 | 1.389 (3) | C17—H17C | 0.9800 |
C3—H3A | 0.9500 | C17—H17D | 0.9800 |
C4—C5 | 1.379 (3) | ||
C11—O2—C15 | 117.24 (13) | C14—C9—C8 | 122.59 (15) |
C12—O3—C16 | 113.37 (13) | C11—C10—C9 | 119.76 (15) |
C13—O4—C17 | 117.45 (13) | C11—C10—H10A | 120.1 |
C7—N1—C1 | 130.78 (14) | C9—C10—H10A | 120.1 |
C7—N1—H1A | 114.6 | O2—C11—C10 | 125.26 (15) |
C1—N1—H1A | 114.6 | O2—C11—C12 | 115.17 (14) |
C8—N2—C7 | 127.44 (14) | C10—C11—C12 | 119.56 (15) |
C8—N2—H2A | 116.3 | O3—C12—C13 | 119.38 (14) |
C7—N2—H2A | 116.3 | O3—C12—C11 | 120.47 (15) |
C2—C1—C6 | 117.45 (16) | C13—C12—C11 | 120.13 (15) |
C2—C1—N1 | 126.57 (15) | O4—C13—C14 | 124.86 (15) |
C6—C1—N1 | 115.96 (15) | O4—C13—C12 | 114.50 (14) |
C1—C2—C3 | 119.80 (17) | C14—C13—C12 | 120.63 (15) |
C1—C2—H2B | 120.1 | C13—C14—C9 | 118.61 (15) |
C3—C2—H2B | 120.1 | C13—C14—H14A | 120.7 |
C4—C3—C2 | 121.17 (18) | C9—C14—H14A | 120.7 |
C4—C3—H3A | 119.4 | O2—C15—H15A | 109.5 |
C2—C3—H3A | 119.4 | O2—C15—H15B | 109.5 |
C5—C4—C3 | 119.40 (17) | H15A—C15—H15B | 109.5 |
C5—C4—H4A | 120.3 | O2—C15—H15C | 109.5 |
C3—C4—H4A | 120.3 | H15A—C15—H15C | 109.5 |
C6—C5—C4 | 118.79 (16) | H15B—C15—H15C | 109.5 |
C6—C5—H5A | 120.6 | O3—C16—H16A | 109.5 |
C4—C5—H5A | 120.6 | O3—C16—H16B | 109.5 |
F1—C6—C5 | 119.23 (15) | H16A—C16—H16B | 109.5 |
F1—C6—C1 | 117.40 (15) | O3—C16—H16C | 109.5 |
C5—C6—C1 | 123.38 (17) | H16A—C16—H16C | 109.5 |
N1—C7—N2 | 114.10 (14) | H16B—C16—H16C | 109.5 |
N1—C7—S1 | 127.56 (13) | O4—C17—H17B | 109.5 |
N2—C7—S1 | 118.34 (12) | O4—C17—H17C | 109.5 |
O1—C8—N2 | 122.03 (15) | H17B—C17—H17C | 109.5 |
O1—C8—C9 | 119.80 (15) | O4—C17—H17D | 109.5 |
N2—C8—C9 | 118.16 (14) | H17B—C17—H17D | 109.5 |
C10—C9—C14 | 121.30 (15) | H17C—C17—H17D | 109.5 |
C10—C9—C8 | 115.80 (14) | ||
C7—N1—C1—C2 | −24.6 (3) | C14—C9—C10—C11 | 0.0 (3) |
C7—N1—C1—C6 | 157.28 (18) | C8—C9—C10—C11 | −173.74 (15) |
C6—C1—C2—C3 | −1.2 (3) | C15—O2—C11—C10 | −5.8 (3) |
N1—C1—C2—C3 | −179.34 (19) | C15—O2—C11—C12 | 173.60 (15) |
C1—C2—C3—C4 | 0.2 (3) | C9—C10—C11—O2 | −179.91 (16) |
C2—C3—C4—C5 | 0.8 (3) | C9—C10—C11—C12 | 0.7 (3) |
C3—C4—C5—C6 | −0.7 (3) | C16—O3—C12—C13 | 102.98 (18) |
C4—C5—C6—F1 | −179.93 (17) | C16—O3—C12—C11 | −78.6 (2) |
C4—C5—C6—C1 | −0.3 (3) | O2—C11—C12—O3 | 1.5 (2) |
C2—C1—C6—F1 | −179.10 (16) | C10—C11—C12—O3 | −179.01 (15) |
N1—C1—C6—F1 | −0.8 (3) | O2—C11—C12—C13 | 179.89 (15) |
C2—C1—C6—C5 | 1.3 (3) | C10—C11—C12—C13 | −0.6 (3) |
N1—C1—C6—C5 | 179.62 (18) | C17—O4—C13—C14 | −5.9 (2) |
C1—N1—C7—N2 | −177.33 (17) | C17—O4—C13—C12 | 175.70 (15) |
C1—N1—C7—S1 | 2.7 (3) | O3—C12—C13—O4 | −3.2 (2) |
C8—N2—C7—N1 | 2.9 (3) | C11—C12—C13—O4 | 178.39 (15) |
C8—N2—C7—S1 | −177.17 (14) | O3—C12—C13—C14 | 178.27 (15) |
C7—N2—C8—O1 | 4.8 (3) | C11—C12—C13—C14 | −0.1 (3) |
C7—N2—C8—C9 | −174.22 (16) | O4—C13—C14—C9 | −177.53 (16) |
O1—C8—C9—C10 | 20.7 (3) | C12—C13—C14—C9 | 0.8 (3) |
N2—C8—C9—C10 | −160.21 (16) | C10—C9—C14—C13 | −0.8 (3) |
O1—C8—C9—C14 | −152.96 (18) | C8—C9—C14—C13 | 172.57 (16) |
N2—C8—C9—C14 | 26.1 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2A···S1i | 0.88 | 2.70 | 3.5219 (15) | 157 |
Symmetry code: (i) −x, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C17H17FN2O4S |
Mr | 364.39 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 120 |
a, b, c (Å) | 4.0828 (5), 14.0420 (16), 14.2295 (16) |
α, β, γ (°) | 91.092 (2), 90.694 (2), 91.712 (2) |
V (Å3) | 815.21 (16) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.24 |
Crystal size (mm) | 0.48 × 0.20 × 0.19 |
Data collection | |
Diffractometer | Bruker SMART APEX |
Absorption correction | Multi-scan (SADABS; Bruker, 2002) |
Tmin, Tmax | 0.896, 0.957 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7686, 3868, 3128 |
Rint | 0.027 |
(sin θ/λ)max (Å−1) | 0.658 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.042, 0.109, 1.03 |
No. of reflections | 3868 |
No. of parameters | 226 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.36, −0.27 |
Computer programs: SMART (Bruker, 2002), SAINT (Bruker, 2002), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2A···S1i | 0.88 | 2.70 | 3.5219 (15) | 156.8 |
Symmetry code: (i) −x, −y+1, −z+1. |
Acknowledgements
The authors gratefully acknowledge a research grant from the Higher Education Commission of Pakistan under the project No. 20-Miscel/R&D/00/3834.
References
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Fluorinated thioureas are convenient synthons for preparation of versatile fluorine-containing heterocycles: [1,3]-benzothiazin-4-ones (Nosova et al.,2006, 2007). 1-aryl-2-ethylthio-quinazolin-4-one, thiazolidine and 1H-1,2,4-triazoles (Lipunova et al., 2008). These constitute a novel class of potent influenza virus neuraminidase inhibitors (Sun et al., 2006). Fluorinated bis-thiourea derivatives are used as organocatalyst in Morita-Baylis-Hillman reaction (Berkessel et al., 2006). N-Substituted N'-(2-fluorobenzoyl)thiourea derivatives are suitable substrates for studying Intramolecular Hydrogen Bonds and Fermi Resonance (Hritzová & Koščík 2008). Fluorinated thioureas have shown potent microbial (Saeed et al., 2009) and insecticidal activities (Xu et al., 2003). The two m-methoxy groups of the title compound, (Fig. 1), C17H17FN2O4S, are almost coplanar with the aromatic ring [CH3—O—C—C 5.8 (1)° and 5.9 (1)°] whereas the methoxygroup in para position is bent out of the ring plane [78.6 (1)°]. The molecules are connected by intermolecular N—H···S hydrogen bonds (Table 1) to centrosymmetric dimers that are stacked along the a axis (Fig. 2).