organic compounds
4′-tert-Butyl-5-chloro-3H-spiro[1,3-benzothiazole-2,1′-cyclohexane]
aDepartment of Physics, Faculty of Sciences, Erciyes University, 38039 Kayseri, Turkey, bDepartment of Pharmaceutical Chemistry, Faculty of Pharmacy, Istanbul University, 34116 Beyazıt, Istanbul, Turkey, and cDepartment of Physics, University of Sargodha, Sargodha, Pakistan
*Correspondence e-mail: akkurt@erciyes.edu.tr
In the title compound, C16H22ClNS, the nine-membered 2,3-dihydro-1,3-benzothiazole ring system is essentially planar, with a maximum deviation of 0.025 (2) Å for the N atom. Its plane is almost perpendicular to the main plane of the substituted cyclohexane ring, which adopts a chair conformation. In the crystal, the molecules are linked by C—H⋯π interactions.
Related literature
For the pharmacological activity of benzothiazole derivatives, see: Coudert et al. (1988); Karalı et al. (2010); Palmer et al. (1971). For the crystal structures of similar compounds, see, for example: Akkurt et al. (2010); Aryai et al. (1976); Karalı et al. (2010). For standard values of bond lengths, see: Allen et al. (1987). For details of ring-puckering analysis, see: Cremer & Pople (1975).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2009); cell SAINT (Bruker, 2009); 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 for Windows (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON.
Supporting information
10.1107/S1600536812017539/su2411sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812017539/su2411Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812017539/su2411Isup3.cml
A mixture of 2-amino-4-chlorothiophenol (0.01 mol) and 4-tert-butylcyclohexanone (0.01 mol) in absolute ethanol (50 ml) was refluxed on a water bath for 8 h. The solvent was evaporated in a crystallizing dish at room temperature and the residue was recrystallized twice from ethanol, giving X-ray quality crystals [Yield: 24.3%, m.p.: 453–455 K]. Analysis calculated for C16H22ClNS: C 64.95, H 7.49, N 4.73%. Found: C 64.91, H 7.47, N 4.64%. Spectroscopic data for the title compound are given in the archive CIF.
The NH H atom was located in a difference Fourier map and freely refined. C-bound H atoms were placed in calculated positions and treated as riding atoms : C—H = 0.93, 0.96, 0.97 and 0.98 Å, for the aromatic, methyl, methylene and methine H atoms, respectively, with Uiso(H) = xUeq(C), x = 1.5 for methyl H atoms and = 1.2 for other H atoms.
Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON (Spek, 2009).C16H22ClNS | F(000) = 632 |
Mr = 295.87 | Dx = 1.280 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 776 reflections |
a = 15.2810 (18) Å | θ = 3.3–19.5° |
b = 8.9830 (8) Å | µ = 0.37 mm−1 |
c = 11.8750 (13) Å | T = 296 K |
β = 109.580 (3)° | Prism, colourless |
V = 1535.8 (3) Å3 | 0.27 × 0.20 × 0.18 mm |
Z = 4 |
Bruker Kappa APEXII CCD diffractometer | 3849 independent reflections |
Radiation source: fine-focus sealed tube | 2330 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.043 |
ω scans | θmax = 28.5°, θmin = 2.7° |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | h = −20→20 |
Tmin = 0.915, Tmax = 0.935 | k = −11→10 |
14074 measured reflections | l = −15→15 |
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)] = 0.052 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.128 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.02 | w = 1/[σ2(Fo2) + (0.0473P)2 + 0.2285P] where P = (Fo2 + 2Fc2)/3 |
3849 reflections | (Δ/σ)max < 0.001 |
179 parameters | Δρmax = 0.25 e Å−3 |
1 restraint | Δρmin = −0.24 e Å−3 |
C16H22ClNS | V = 1535.8 (3) Å3 |
Mr = 295.87 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 15.2810 (18) Å | µ = 0.37 mm−1 |
b = 8.9830 (8) Å | T = 296 K |
c = 11.8750 (13) Å | 0.27 × 0.20 × 0.18 mm |
β = 109.580 (3)° |
Bruker Kappa APEXII CCD diffractometer | 3849 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 2330 reflections with I > 2σ(I) |
Tmin = 0.915, Tmax = 0.935 | Rint = 0.043 |
14074 measured reflections |
R[F2 > 2σ(F2)] = 0.052 | 1 restraint |
wR(F2) = 0.128 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.02 | Δρmax = 0.25 e Å−3 |
3849 reflections | Δρmin = −0.24 e Å−3 |
179 parameters |
Experimental. Spectroscopic data for the title compound: IR (KBr) ν = 3370 (N—H), 2962, 2912, 2862 (C—H), 1585, 1571, 1473, 1442 (C=C) cm-1; 1H-NMR (DMSO-d6, 500 MHz) d= 0.83–0.86 (9H, m, 4'-C(CH3)3-cyc.), 0.95–1.02 (1H, m, CH/CH2-cyc.), 1.09–1.36 (2H, m, CH/CH2-cyc.), 1.58–1.72 (4H, m, CH/CH2-cyc.), 2.15–2.22 (2H, m, CH/CH2-cyc.), 6.40, 6.47 (1H, 2 d, J=2.0 Hz, H4-bt.), 6.50 (1H, dd, J=8.1, 2.0 Hz, H6-bt.), 6.90 (1H, d, J=7.8 Hz, H7-bt.), 6.73, 6.97 (1H, 2 s, NH) p.p.m. (cyc.=cyclohexane, bt.=benzothiazole). |
Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All su's are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles |
Refinement. Refinement on F2 for ALL reflections except those flagged by the user for potential systematic errors. Weighted R-factors wR and all goodnesses of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The observed criterion of F2 > σ(F2) is used only for calculating -R-factor-obs 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 | ||
Cl1 | −0.35486 (5) | 0.80459 (8) | 0.13722 (7) | 0.0761 (3) | |
S1 | 0.02827 (4) | 0.69814 (6) | 0.07426 (5) | 0.0503 (2) | |
N1 | −0.00626 (14) | 0.8895 (2) | 0.2213 (2) | 0.0628 (8) | |
C1 | −0.08493 (14) | 0.7159 (2) | 0.07911 (17) | 0.0369 (7) | |
C2 | −0.16334 (16) | 0.6409 (2) | 0.0125 (2) | 0.0474 (8) | |
C3 | −0.24750 (16) | 0.6684 (2) | 0.0286 (2) | 0.0515 (8) | |
C4 | −0.25028 (16) | 0.7710 (2) | 0.1132 (2) | 0.0469 (8) | |
C5 | −0.17272 (16) | 0.8482 (2) | 0.1807 (2) | 0.0447 (7) | |
C6 | −0.08920 (15) | 0.8210 (2) | 0.16337 (18) | 0.0390 (7) | |
C7 | 0.07535 (15) | 0.8422 (2) | 0.1936 (2) | 0.0442 (7) | |
C8 | 0.11774 (16) | 0.9705 (2) | 0.1463 (2) | 0.0519 (8) | |
C9 | 0.20566 (15) | 0.9285 (2) | 0.1218 (2) | 0.0500 (8) | |
C10 | 0.27931 (14) | 0.8647 (2) | 0.23261 (18) | 0.0408 (7) | |
C11 | 0.23620 (15) | 0.7316 (2) | 0.27578 (19) | 0.0438 (7) | |
C12 | 0.14820 (15) | 0.7730 (2) | 0.30136 (19) | 0.0467 (8) | |
C13 | 0.37389 (16) | 0.8291 (2) | 0.2176 (2) | 0.0509 (8) | |
C14 | 0.4048 (2) | 0.9596 (3) | 0.1572 (3) | 0.0845 (14) | |
C15 | 0.44715 (18) | 0.8047 (3) | 0.3408 (2) | 0.0800 (11) | |
C16 | 0.36933 (18) | 0.6896 (3) | 0.1415 (2) | 0.0651 (10) | |
H1N | −0.0005 (17) | 0.955 (2) | 0.2742 (16) | 0.070 (8)* | |
H2 | −0.16000 | 0.57120 | −0.04380 | 0.0570* | |
H3 | −0.30100 | 0.61850 | −0.01690 | 0.0620* | |
H5 | −0.17650 | 0.91750 | 0.23700 | 0.0540* | |
H8A | 0.07240 | 1.00700 | 0.07300 | 0.0620* | |
H8B | 0.13160 | 1.05100 | 0.20410 | 0.0620* | |
H9A | 0.23040 | 1.01600 | 0.09520 | 0.0600* | |
H9B | 0.19090 | 0.85550 | 0.05810 | 0.0600* | |
H10 | 0.29130 | 0.94100 | 0.29500 | 0.0490* | |
H11A | 0.22180 | 0.65430 | 0.21530 | 0.0520* | |
H11B | 0.28120 | 0.69160 | 0.34790 | 0.0520* | |
H12A | 0.12260 | 0.68450 | 0.32520 | 0.0560* | |
H12B | 0.16360 | 0.84290 | 0.36740 | 0.0560* | |
H14A | 0.46750 | 0.94360 | 0.15950 | 0.1270* | |
H14B | 0.40160 | 1.05020 | 0.19850 | 0.1270* | |
H14C | 0.36470 | 0.96690 | 0.07550 | 0.1270* | |
H15A | 0.50660 | 0.78790 | 0.33200 | 0.1200* | |
H15B | 0.43040 | 0.71970 | 0.37820 | 0.1200* | |
H15C | 0.45040 | 0.89120 | 0.38960 | 0.1200* | |
H16A | 0.31930 | 0.69930 | 0.06700 | 0.0980* | |
H16B | 0.35900 | 0.60370 | 0.18350 | 0.0980* | |
H16C | 0.42680 | 0.67840 | 0.12620 | 0.0980* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1 | 0.0543 (4) | 0.0816 (5) | 0.1046 (6) | 0.0027 (3) | 0.0428 (4) | −0.0018 (4) |
S1 | 0.0456 (3) | 0.0510 (4) | 0.0568 (4) | −0.0017 (3) | 0.0203 (3) | −0.0182 (3) |
N1 | 0.0467 (12) | 0.0636 (14) | 0.0770 (15) | −0.0030 (10) | 0.0191 (11) | −0.0390 (12) |
C1 | 0.0441 (12) | 0.0319 (11) | 0.0363 (11) | 0.0025 (9) | 0.0158 (9) | 0.0017 (8) |
C2 | 0.0533 (14) | 0.0404 (12) | 0.0483 (13) | −0.0035 (10) | 0.0168 (11) | −0.0086 (10) |
C3 | 0.0460 (14) | 0.0488 (14) | 0.0571 (15) | −0.0096 (11) | 0.0139 (12) | −0.0054 (11) |
C4 | 0.0438 (13) | 0.0414 (12) | 0.0586 (15) | 0.0046 (10) | 0.0214 (11) | 0.0072 (10) |
C5 | 0.0531 (14) | 0.0361 (11) | 0.0492 (13) | 0.0061 (10) | 0.0229 (11) | −0.0011 (9) |
C6 | 0.0455 (13) | 0.0295 (10) | 0.0412 (12) | 0.0022 (9) | 0.0133 (10) | −0.0016 (9) |
C7 | 0.0402 (13) | 0.0395 (12) | 0.0517 (13) | −0.0018 (9) | 0.0139 (11) | −0.0117 (10) |
C8 | 0.0483 (14) | 0.0382 (12) | 0.0580 (15) | 0.0040 (10) | 0.0030 (11) | 0.0069 (10) |
C9 | 0.0518 (14) | 0.0434 (12) | 0.0515 (14) | −0.0031 (10) | 0.0131 (11) | 0.0118 (10) |
C10 | 0.0424 (12) | 0.0352 (11) | 0.0411 (12) | −0.0016 (9) | 0.0091 (10) | −0.0016 (9) |
C11 | 0.0465 (13) | 0.0404 (12) | 0.0400 (12) | 0.0039 (10) | 0.0087 (10) | 0.0094 (9) |
C12 | 0.0554 (15) | 0.0414 (12) | 0.0440 (13) | −0.0032 (10) | 0.0176 (11) | −0.0010 (9) |
C13 | 0.0451 (14) | 0.0488 (13) | 0.0572 (15) | 0.0010 (10) | 0.0151 (11) | −0.0043 (11) |
C14 | 0.070 (2) | 0.0732 (19) | 0.126 (3) | −0.0153 (15) | 0.0536 (19) | 0.0001 (18) |
C15 | 0.0468 (16) | 0.105 (2) | 0.077 (2) | 0.0111 (15) | 0.0061 (15) | −0.0186 (16) |
C16 | 0.0638 (17) | 0.0669 (16) | 0.0687 (17) | 0.0053 (13) | 0.0278 (14) | −0.0127 (13) |
Cl1—C4 | 1.741 (3) | C2—H2 | 0.9300 |
S1—C1 | 1.757 (2) | C3—H3 | 0.9300 |
S1—C7 | 1.875 (2) | C5—H5 | 0.9300 |
N1—C6 | 1.369 (3) | C8—H8A | 0.9700 |
N1—C7 | 1.456 (3) | C8—H8B | 0.9700 |
N1—H1N | 0.844 (18) | C9—H9A | 0.9700 |
C1—C2 | 1.371 (3) | C9—H9B | 0.9700 |
C1—C6 | 1.393 (3) | C10—H10 | 0.9800 |
C2—C3 | 1.384 (4) | C11—H11A | 0.9700 |
C3—C4 | 1.375 (3) | C11—H11B | 0.9700 |
C4—C5 | 1.375 (3) | C12—H12A | 0.9700 |
C5—C6 | 1.381 (3) | C12—H12B | 0.9700 |
C7—C12 | 1.519 (3) | C14—H14A | 0.9600 |
C7—C8 | 1.519 (3) | C14—H14B | 0.9600 |
C8—C9 | 1.515 (3) | C14—H14C | 0.9600 |
C9—C10 | 1.528 (3) | C15—H15A | 0.9600 |
C10—C13 | 1.548 (3) | C15—H15B | 0.9600 |
C10—C11 | 1.534 (3) | C15—H15C | 0.9600 |
C11—C12 | 1.521 (3) | C16—H16A | 0.9600 |
C13—C15 | 1.531 (3) | C16—H16B | 0.9600 |
C13—C16 | 1.533 (3) | C16—H16C | 0.9600 |
C13—C14 | 1.529 (4) | ||
C1—S1—C7 | 92.59 (10) | C7—C8—H8A | 109.00 |
C6—N1—C7 | 118.31 (19) | C7—C8—H8B | 109.00 |
C6—N1—H1N | 122.4 (18) | C9—C8—H8A | 109.00 |
C7—N1—H1N | 119.2 (18) | C9—C8—H8B | 109.00 |
C2—C1—C6 | 120.3 (2) | H8A—C8—H8B | 108.00 |
S1—C1—C6 | 111.63 (16) | C8—C9—H9A | 109.00 |
S1—C1—C2 | 128.03 (16) | C8—C9—H9B | 109.00 |
C1—C2—C3 | 120.35 (19) | C10—C9—H9A | 109.00 |
C2—C3—C4 | 118.6 (2) | C10—C9—H9B | 109.00 |
Cl1—C4—C3 | 119.39 (19) | H9A—C9—H9B | 108.00 |
Cl1—C4—C5 | 118.43 (17) | C9—C10—H10 | 107.00 |
C3—C4—C5 | 122.2 (2) | C11—C10—H10 | 107.00 |
C4—C5—C6 | 118.9 (2) | C13—C10—H10 | 107.00 |
C1—C6—C5 | 119.7 (2) | C10—C11—H11A | 109.00 |
N1—C6—C1 | 114.0 (2) | C10—C11—H11B | 109.00 |
N1—C6—C5 | 126.29 (19) | C12—C11—H11A | 109.00 |
S1—C7—N1 | 103.38 (15) | C12—C11—H11B | 109.00 |
N1—C7—C8 | 111.46 (17) | H11A—C11—H11B | 108.00 |
S1—C7—C8 | 110.32 (15) | C7—C12—H12A | 109.00 |
S1—C7—C12 | 109.96 (13) | C7—C12—H12B | 109.00 |
C8—C7—C12 | 109.82 (19) | C11—C12—H12A | 109.00 |
N1—C7—C12 | 111.75 (19) | C11—C12—H12B | 109.00 |
C7—C8—C9 | 113.43 (16) | H12A—C12—H12B | 108.00 |
C8—C9—C10 | 111.89 (18) | C13—C14—H14A | 110.00 |
C9—C10—C11 | 107.78 (18) | C13—C14—H14B | 109.00 |
C9—C10—C13 | 115.16 (18) | C13—C14—H14C | 109.00 |
C11—C10—C13 | 113.56 (16) | H14A—C14—H14B | 109.00 |
C10—C11—C12 | 112.56 (16) | H14A—C14—H14C | 109.00 |
C7—C12—C11 | 112.28 (18) | H14B—C14—H14C | 109.00 |
C10—C13—C15 | 109.36 (19) | C13—C15—H15A | 110.00 |
C10—C13—C16 | 112.15 (19) | C13—C15—H15B | 109.00 |
C14—C13—C16 | 108.1 (2) | C13—C15—H15C | 110.00 |
C15—C13—C16 | 108.70 (18) | H15A—C15—H15B | 110.00 |
C14—C13—C15 | 108.4 (2) | H15A—C15—H15C | 109.00 |
C10—C13—C14 | 110.04 (18) | H15B—C15—H15C | 109.00 |
C1—C2—H2 | 120.00 | C13—C16—H16A | 110.00 |
C3—C2—H2 | 120.00 | C13—C16—H16B | 109.00 |
C2—C3—H3 | 121.00 | C13—C16—H16C | 109.00 |
C4—C3—H3 | 121.00 | H16A—C16—H16B | 109.00 |
C4—C5—H5 | 121.00 | H16A—C16—H16C | 109.00 |
C6—C5—H5 | 121.00 | H16B—C16—H16C | 110.00 |
C7—S1—C1—C2 | 180.00 (19) | C4—C5—C6—N1 | 178.9 (2) |
C7—S1—C1—C6 | −0.14 (15) | C4—C5—C6—C1 | −0.5 (3) |
C1—S1—C7—N1 | −1.11 (14) | S1—C7—C8—C9 | −68.5 (2) |
C1—S1—C7—C8 | −120.40 (16) | N1—C7—C8—C9 | 177.21 (19) |
C1—S1—C7—C12 | 118.33 (16) | C12—C7—C8—C9 | 52.8 (2) |
C6—N1—C7—S1 | 2.3 (2) | S1—C7—C12—C11 | 69.25 (19) |
C6—N1—C7—C8 | 120.8 (2) | N1—C7—C12—C11 | −176.55 (16) |
C6—N1—C7—C12 | −115.9 (2) | C8—C7—C12—C11 | −52.3 (2) |
C7—N1—C6—C1 | −2.6 (3) | C7—C8—C9—C10 | −56.6 (2) |
C7—N1—C6—C5 | 178.01 (19) | C8—C9—C10—C11 | 56.2 (2) |
S1—C1—C2—C3 | 179.60 (16) | C8—C9—C10—C13 | −175.93 (15) |
C6—C1—C2—C3 | −0.3 (3) | C9—C10—C11—C12 | −56.7 (2) |
S1—C1—C6—N1 | 1.5 (2) | C13—C10—C11—C12 | 174.45 (17) |
S1—C1—C6—C5 | −179.09 (15) | C9—C10—C13—C14 | 46.7 (2) |
C2—C1—C6—N1 | −178.61 (18) | C9—C10—C13—C15 | 165.71 (17) |
C2—C1—C6—C5 | 0.8 (3) | C9—C10—C13—C16 | −73.6 (2) |
C1—C2—C3—C4 | −0.6 (3) | C11—C10—C13—C14 | 171.7 (2) |
C2—C3—C4—C5 | 0.9 (3) | C11—C10—C13—C15 | −69.4 (2) |
C2—C3—C4—Cl1 | −178.66 (16) | C11—C10—C13—C16 | 51.3 (2) |
Cl1—C4—C5—C6 | 179.20 (15) | C10—C11—C12—C7 | 56.6 (2) |
C3—C4—C5—C6 | −0.4 (3) |
Cg1 is the centroid of the C1–C6 benzene ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C8—H8B···Cg1i | 0.97 | 2.84 | 3.796 (2) | 169 |
Symmetry code: (i) −x, y+1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C16H22ClNS |
Mr | 295.87 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 296 |
a, b, c (Å) | 15.2810 (18), 8.9830 (8), 11.8750 (13) |
β (°) | 109.580 (3) |
V (Å3) | 1535.8 (3) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.37 |
Crystal size (mm) | 0.27 × 0.20 × 0.18 |
Data collection | |
Diffractometer | Bruker Kappa APEXII CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.915, 0.935 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 14074, 3849, 2330 |
Rint | 0.043 |
(sin θ/λ)max (Å−1) | 0.672 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.052, 0.128, 1.02 |
No. of reflections | 3849 |
No. of parameters | 179 |
No. of restraints | 1 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.25, −0.24 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2009), WinGX (Farrugia, 1999) and PLATON (Spek, 2009).
Cg1 is the centroid of the C1–C6 benzene ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C8—H8B···Cg1i | 0.97 | 2.84 | 3.796 (2) | 169 |
Symmetry code: (i) −x, y+1/2, −z+1/2. |
Acknowledgements
The authors acknowledge the provision of funds for the purchase of a diffractometer and encouragement by Dr Muhammad Akram Chaudhary, Vice Chancellor, University of Sargodha, Pakistan.
References
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The condensation of aldehydes and ketones with 2-aminothiophenoles lead to benzothiazolines and spirobenzothiazolines which are reported to exhibit antitubercular (Palmer et al., 1971), analgesic (Coudert et al., 1988) and antioxidant (Karalı et al., 2010) properties. The reactivity of cyclic ketones towards 2-aminothiophenoles has also been examined and the structure of the end products has been discussed (Aryai et al., 1976; Coudert et al., 1988; Akkurt et al., 2010; Karalı et al., 2010). Prompted by the above observations, we report here the synthesis, spectroscopic and crystal structure of the title compound.
As shown in Fig. 1, the C7—C12 cyclohexane ring of the title compound adopts a chair conformation [puckering parameters (Cremer & Pople, 1975): QT = 0.564 (2) Å, θ = 176.5 (2) ° and ϕ = 4(4) °]. The mean plane of the 2,3-dihydro-1,3-benzothiazole ring system [max. deviation: -0.025 (2) Å for N1] is almost perpendicular with a dihedral angle of 89.39 (5) ° to the main plane formed by the C8,C9, C11 and C12 atoms of the cyclohexane ring. The bond lengths (Allen et al., 1987) and bond angles are within the expected values.
The crystal packing is stabilized by C—H···π interactions (Table 1 and Fig. 2).