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The title compound, C10H9NO2S, has a boat-shaped heterocyclic six-membered ring such that the S and N atoms lie essentially in the plane of the benzene ring while the remaining two C atoms are above this plane.
Supporting information
CCDC reference: 145663
Dithioanilin (10 g, 0.04 mol) was refluxed in a 250 ml two-necked round-bottomed flask equipped with a reflux condenser and a dropping funnel. Then ethyl acetoacetate (0.08 mol) in xylol (15 ml) was added dropwise. After 1.5 h the reaction was stopped, the solvent volume was reduced and the solution was allowed to settle. The product obtained was filtered off, washed with ether and recrystallized from ethanol (yield: 60%, m.p.: 447–449 K).
The difference Fourier maps showed that the methyl H atoms attached to the C14 atom have two equilibrium positions with an equal occupancy of 0.5.
Data collection: KappaCCD software; data reduction: DENZO and SCALEPAK (Otwinowski & Minor, 1997); program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: maXus (Mackay et al., 1999); software used to prepare material for publication: maXus.
Crystal data top
C10H9NO2S | F(000) = 432 |
Mr = 207.25 | Dx = 1.448 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
a = 11.384 (1) Å | Cell parameters from 6857 reflections |
b = 10.202 (1) Å | θ = 1–26.4° |
c = 14.942 (2) Å | µ = 0.31 mm−1 |
β = 146.816 (6)° | T = 298 K |
V = 950.0 (9) Å3 | Cube, colourless |
Z = 4 | 0.35 × 0.30 × 0.30 mm |
Data collection top
KappaCCD diffractometer | Rint = 0.023 |
Radiation source: fine-focus sealed tube | θmax = 26.4° |
ϕ scan | h = −14→14 |
2011 measured reflections | k = −12→0 |
1900 independent reflections | l = −18→14 |
1741 reflections with I > 3σ(I) | |
Refinement top
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: geom, diff |
R[F2 > 2σ(F2)] = 0.032 | H-atom parameters not refined |
wR(F2) = 0.045 | Weighting scheme based on measured s.u.'s w = 1/[σ2(Fo2) + 0.03Fo2] |
S = 1.18 | (Δ/σ)max = 0.005 |
1741 reflections | Δρmax = 0.22 e Å−3 |
127 parameters | Δρmin = −0.26 e Å−3 |
Primary atom site location: structure-invariant direct methods | |
Crystal data top
C10H9NO2S | V = 950.0 (9) Å3 |
Mr = 207.25 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 11.384 (1) Å | µ = 0.31 mm−1 |
b = 10.202 (1) Å | T = 298 K |
c = 14.942 (2) Å | 0.35 × 0.30 × 0.30 mm |
β = 146.816 (6)° | |
Data collection top
KappaCCD diffractometer | 1741 reflections with I > 3σ(I) |
2011 measured reflections | Rint = 0.023 |
1900 independent reflections | |
Refinement top
R[F2 > 2σ(F2)] = 0.032 | 127 parameters |
wR(F2) = 0.045 | H-atom parameters not refined |
S = 1.18 | Δρmax = 0.22 e Å−3 |
1741 reflections | Δρmin = −0.26 e Å−3 |
Special details top
Refinement. Refinement on F2. |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top | x | y | z | Uiso*/Ueq | Occ. (<1) |
S1 | −0.04468 (2) | 0.036131 (13) | 0.859442 (14) | 0.06158 (5) | |
O2 | 0.24298 (4) | −0.07377 (3) | 0.82898 (3) | 0.0763 (2) | |
O3 | −0.04470 (5) | 0.20333 (3) | 0.64665 (4) | 0.1068 (2) | |
N4 | 0.34585 (5) | 0.08011 (3) | 0.99404 (4) | 0.0552 (2) | |
C5 | 0.19747 (6) | 0.00268 (3) | 0.86074 (4) | 0.0545 (2) | |
C6 | −0.03175 (5) | 0.01477 (3) | 0.74704 (4) | 0.0503 (2) | |
C7 | −0.14659 (6) | 0.12712 (4) | 0.62642 (5) | 0.0633 (2) | |
C8 | 0.31115 (6) | 0.17569 (3) | 1.03816 (4) | 0.0499 (2) | |
C9 | 0.13345 (6) | 0.16913 (3) | 0.98148 (4) | 0.0494 (2) | |
C10 | 0.43311 (7) | 0.36795 (4) | 1.19302 (5) | 0.0832 (2) | |
C11 | 0.46010 (6) | 0.27535 (4) | 1.14367 (5) | 0.0680 (2) | |
C12 | 0.10690 (6) | 0.26411 (4) | 1.03062 (5) | 0.0671 (2) | |
C13 | 0.25574 (7) | 0.36276 (4) | 1.13566 (5) | 0.0867 (3) | |
C14 | −0.38369 (7) | 0.13880 (4) | 0.48812 (5) | 0.0721 (2) | |
H6 | −0.10365 | −0.06503 | 0.68514 | 0.05000* | |
H10 | 0.53741 | 0.43635 | 1.26702 | 0.05000* | |
H11 | 0.58220 | 0.28005 | 1.18247 | 0.05000* | |
H12 | −0.01580 | 0.26021 | 0.99123 | 0.05000* | |
H13 | 0.23664 | 0.42786 | 1.16916 | 0.05000* | |
H14A | −0.43519 | 0.21360 | 0.42272 | 0.05000* | 0.50 |
H14B | −0.41539 | 0.14950 | 0.53032 | 0.05000* | 0.50 |
H14C | −0.45279 | 0.06110 | 0.42212 | 0.05000* | 0.50 |
H4 | 0.47015 | 0.07481 | 1.04544 | 0.05000* | |
H14D | −0.45009 | 0.05500 | 0.48402 | 0.05000* | 0.50 |
H14E | −0.41409 | 0.22720 | 0.49872 | 0.05000* | 0.50 |
H14F | −0.44999 | 0.13910 | 0.38022 | 0.05000* | 0.50 |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
S1 | 0.03280 (5) | 0.03968 (5) | 0.03646 (5) | −0.00362 (4) | 0.03083 (5) | −0.00045 (4) |
O2 | 0.0398 (2) | 0.0418 (2) | 0.0488 (2) | −0.00110 (10) | 0.0390 (2) | −0.00850 (10) |
O3 | 0.0585 (2) | 0.0556 (2) | 0.0666 (2) | 0.0033 (2) | 0.0546 (2) | 0.0165 (2) |
N4 | 0.0256 (2) | 0.0380 (2) | 0.0342 (2) | −0.00050 (10) | 0.0257 (2) | −0.00380 (10) |
C5 | 0.0307 (2) | 0.0293 (2) | 0.0326 (2) | 0.0018 (2) | 0.0275 (2) | 0.0022 (2) |
C6 | 0.0274 (2) | 0.0278 (2) | 0.0299 (2) | −0.0016 (2) | 0.0243 (2) | −0.0020 (2) |
C7 | 0.0388 (2) | 0.0334 (2) | 0.0352 (2) | 0.0006 (2) | 0.0325 (2) | 0.0003 (2) |
C8 | 0.0288 (2) | 0.0308 (2) | 0.0267 (2) | 0.0026 (2) | 0.0238 (2) | 0.0026 (2) |
C9 | 0.0284 (2) | 0.0317 (2) | 0.0257 (2) | 0.0033 (2) | 0.0230 (2) | 0.0037 (2) |
C10 | 0.0548 (3) | 0.0402 (2) | 0.0420 (3) | −0.0126 (2) | 0.0408 (3) | −0.0118 (2) |
C11 | 0.0378 (2) | 0.0437 (2) | 0.0373 (2) | −0.0096 (2) | 0.0323 (2) | −0.0072 (2) |
C12 | 0.0374 (2) | 0.0468 (2) | 0.0351 (2) | 0.0081 (2) | 0.0313 (2) | 0.0038 (2) |
C13 | 0.0579 (3) | 0.0422 (3) | 0.0441 (3) | 0.0051 (2) | 0.0439 (3) | −0.0024 (2) |
C14 | 0.0378 (2) | 0.0465 (3) | 0.0368 (2) | 0.0073 (2) | 0.0284 (2) | 0.0067 (2) |
Geometric parameters (Å, º) top
S1—C6 | 1.8181 (5) | C7—C14 | 1.4948 (8) |
S1—C9 | 1.7579 (5) | C8—C9 | 1.3952 (6) |
O2—C5 | 1.2299 (6) | C8—C11 | 1.3864 (7) |
O3—C7 | 1.2061 (6) | C9—C12 | 1.3928 (7) |
N4—C5 | 1.3462 (6) | C10—C11 | 1.3823 (8) |
N4—C8 | 1.4060 (6) | C10—C13 | 1.3852 (9) |
C5—C6 | 1.5134 (7) | C12—C13 | 1.3771 (8) |
C6—C7 | 1.5251 (7) | | |
| | | |
C6—S1—C9 | 97.84 (2) | N4—C8—C9 | 121.16 (5) |
C5—N4—C8 | 127.16 (4) | N4—C8—C11 | 119.11 (4) |
O2—C5—N4 | 121.89 (4) | C9—C8—C11 | 119.91 (5) |
O2—C5—C6 | 120.41 (4) | S1—C9—C8 | 119.60 (4) |
N4—C5—C6 | 117.58 (4) | S1—C9—C12 | 120.92 (4) |
S1—C6—C5 | 111.68 (3) | C8—C9—C12 | 119.39 (5) |
S1—C6—C7 | 110.51 (3) | C11—C10—C13 | 120.18 (5) |
C5—C6—C7 | 110.81 (4) | C8—C11—C10 | 120.13 (5) |
O3—C7—C6 | 119.72 (5) | C9—C12—C13 | 120.46 (5) |
O3—C7—C14 | 122.68 (5) | C10—C13—C12 | 119.95 (5) |
C6—C7—C14 | 117.65 (4) | | |
Experimental details
Crystal data |
Chemical formula | C10H9NO2S |
Mr | 207.25 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 298 |
a, b, c (Å) | 11.384 (1), 10.202 (1), 14.942 (2) |
β (°) | 146.816 (6) |
V (Å3) | 950.0 (9) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.31 |
Crystal size (mm) | 0.35 × 0.30 × 0.30 |
|
Data collection |
Diffractometer | KappaCCD diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 3σ(I)] reflections | 2011, 1900, 1741 |
Rint | 0.023 |
(sin θ/λ)max (Å−1) | 0.625 |
|
Refinement |
R[F2 > 2σ(F2)], wR(F2), S | 0.032, 0.045, 1.18 |
No. of reflections | 1741 |
No. of parameters | 127 |
No. of restraints | ? |
H-atom treatment | H-atom parameters not refined |
Δρmax, Δρmin (e Å−3) | 0.22, −0.26 |
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4H-1,4-Benzothiazines have been reported to possess a wide spectrum of pharmacological properties similar to phenothiazines (Krapcho, 1976; Keyzer et al., 1992; Chihara et al., 1984; Corona et al., 1992; Hiroyuki et al., 1990). These products constitute an interesting series of heterocyclic compounds, not only from their biological activities, but also for structural investigations
The structure of the title compound, (I), was assigned on the basis of NMR and IR spectroscopy, and mass spectrometry, and by X-ray crystallography in order to establish its structure in the solid state. The S and N atoms of the six-membered heterocyclic ring lie almost in the plane of the benzene ring, such that the dihedral angle between the mean C6 and SCCN planes is 176.4 (6)°. The other two C atoms of the heterocylic ring lie 0.4806 (3) and 1.0163 (3) Å above the SCCN mean plane. This corresponds to a boat conformation for the ring.