organic compounds
2-(2H-1,3-Benzodioxol-5-yl)-1,3-benzothiazole
aDepartment of Physics, C. Abdul Hakeem College of Engineering & Technology, Melvisharam, Vellore 632 509, India, bDepartment of Physics, Thanthai Periyar Government Institute of Technology, Vellore 632 002, India, and cDepartment of Organic Chemistry, University of Madras, Maraimalai Campus, Chennai 600 025, India
*Correspondence e-mail: smurugavel27@gmail.com
In the title compound, C14H9O2S, the benzothiazole unit is oriented at a dihedral angle of 7.1 (1)° with respect to the benzodioxole unit. The dioxole ring adopts flattened with the methylene C atom at the flap. The crystal packing is stabilized by π–π interactions [centroid–centroid distances = 3.705 (1) and 3.752 (1) Å], C—H⋯π interactions and a short S⋯S contact of 3.485 (1) Å.
Related literature
For background to the applications of benzothiazoles in the chemical industry, see: Bradshaw et al. (2002); Delmas et al. (2002); Hutchinson et al. (2002). For the pharmacological activity of benzothiazole derivatives, see: Repiĉ et al. (2001); Schwartz et al. (1992). For ring puckering analysis, see: Cremer & Pople (1975). For related structures, see: Baryala et al. (2010); Zhang et al. (2008).
Experimental
Crystal data
|
Refinement
|
Data collection: APEX2 (Bruker, 2004); cell APEX2 and SAINT (Bruker, 2004); data reduction: SAINT and XPREP (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97 and PLATON (Spek, 2009).
Supporting information
10.1107/S1600536812008914/gk2459sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812008914/gk2459Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812008914/gk2459Isup3.cml
A mixture of benzo[d][1,3]dioxole-5-carbaldehyde (0.15 g, 1 mmol), 2-aminobenzenethiol (0.125 g, 1 mmol), H2O2 (0.013 g, 0.4 mmol) and NH4Ce(NO3)6 (0.053 g, 0.1 mmol) was heated at 50°C for 12 h. After completion of the reaction, the reaction mixture was dissolved in EtOH and then poured into ice–water. The products were filtered, washed with ice-water, and subsequently dried. Recystallization of the product from ethyl acetate: hexanes (1: 10) yielded colourless crystals of the title compound (0.22 g; yield: 91%).
All the H atoms were positioned geometrically, with C–H = 0.93–0.97 Å and constrained to ride on their parent atom, with Uiso(H) =1.5Ueq for methyl H atoms and 1.2Ueq(C) for other H atoms.
Benzothiazoles are remarkable heterocyclic ring systems. They possess therapeutic value, are synthetic intermediates in the preparation of medicinal compounds and find numerous applications in chemical industry (Bradshaw et al., 2002; Hutchinson et al., 2002; Delmas et al., 2002). Benzothiazole nucleus is associated with several pharmacological activities such as anti-tumor (Repiĉ et al., 2001) and antimicrobial (Schwartz et al., 1992). In view of this biological importance, the
of the title compound has been determined and the results are presented here.Fig. 1. shows a displacement ellipsoid plot of (I), with the atom numbering scheme. The benzothiazole moiety is essentially planar [maximum deviation = -0.016 (1) Å for the C14 atom] and lies at an angle 7.1 (1)° with respect to the benzodioxole unit. The dioxole (O1/O2/C11/C12/C14) ring adopts an φ2 = 143.8 (1)°. The geometric parameters of the title molecule agree well with those reported for similar structures (Baryala et al., 2010; Zhang et al., 2008).
with the C14 (displacement = 0.03 (18) Å) atom as the flap atom and with puckering parameters (Cremer & Pople, 1975), q2 = 0.0882 (16) Å andThe crystal packing is stabilized by π—π interactions with Cg3···Cg4i and Cg1···Cg4i seperations of 3.705 (1) Å and 3.752 (1) Å, respectively (Fig. 2; Cg1, Cg3 and Cg4 are the centroids of the N1/S1/C1/C2/C7 thiazole ring, C2–C7 benzene ring and C8–C13 benzene ring, respectively, symmetry code as in Fig. 2). The crystal packing (Fig. 3) is further stabilized by a short contact S1···S1iii [3.485 (1) Å; symmetry code: (iii) = -x, 1 - y, 1 - z], which is shorter than the sum of the van der Waals radii of these atoms [3.60 Å].
For background to the applications of benzothiazoles in the chemical industry, see: Bradshaw et al. (2002); Delmas et al. (2002); Hutchinson et al. (2002). For the pharmacological activity of benzothiazole derivatives, see: Repiĉ et al. (2001); Schwartz et al. (1992). For ring puckering analysis, see: Cremer & Pople (1975). For related structures, see: Baryala et al. (2010); Zhang et al. (2008).
Data collection: APEX2 (Bruker, 2004); cell
APEX2 and SAINT (Bruker, 2004); data reduction: SAINT and XPREP (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).C14H9NO2S | F(000) = 1056 |
Mr = 255.28 | Dx = 1.487 Mg m−3 |
Orthorhombic, Pbca | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2ab | Cell parameters from 3185 reflections |
a = 6.3356 (2) Å | θ = 2.7–29.5° |
b = 16.3222 (5) Å | µ = 0.28 mm−1 |
c = 22.0471 (7) Å | T = 293 K |
V = 2279.91 (12) Å3 | Block, colourless |
Z = 8 | 0.25 × 0.23 × 0.18 mm |
Bruker APEXII CCD diffractometer | 3135 independent reflections |
Radiation source: fine-focus sealed tube | 2243 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.027 |
Detector resolution: 10.0 pixels mm-1 | θmax = 29.5°, θmin = 2.7° |
ω scans | h = −7→8 |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | k = −22→19 |
Tmin = 0.934, Tmax = 0.952 | l = −30→30 |
15338 measured reflections |
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)] = 0.039 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.105 | H-atom parameters constrained |
S = 1.02 | w = 1/[σ2(Fo2) + (0.0459P)2 + 0.5885P] where P = (Fo2 + 2Fc2)/3 |
3135 reflections | (Δ/σ)max < 0.001 |
163 parameters | Δρmax = 0.29 e Å−3 |
0 restraints | Δρmin = −0.24 e Å−3 |
C14H9NO2S | V = 2279.91 (12) Å3 |
Mr = 255.28 | Z = 8 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 6.3356 (2) Å | µ = 0.28 mm−1 |
b = 16.3222 (5) Å | T = 293 K |
c = 22.0471 (7) Å | 0.25 × 0.23 × 0.18 mm |
Bruker APEXII CCD diffractometer | 3135 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2243 reflections with I > 2σ(I) |
Tmin = 0.934, Tmax = 0.952 | Rint = 0.027 |
15338 measured reflections |
R[F2 > 2σ(F2)] = 0.039 | 0 restraints |
wR(F2) = 0.105 | H-atom parameters constrained |
S = 1.02 | Δρmax = 0.29 e Å−3 |
3135 reflections | Δρmin = −0.24 e Å−3 |
163 parameters |
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. |
x | y | z | Uiso*/Ueq | ||
C2 | 0.3453 (2) | 0.55583 (8) | 0.34631 (6) | 0.0361 (3) | |
C3 | 0.5016 (3) | 0.53503 (10) | 0.30472 (7) | 0.0467 (4) | |
H3 | 0.5044 | 0.5591 | 0.2665 | 0.056* | |
C4 | 0.6519 (3) | 0.47847 (11) | 0.32101 (8) | 0.0536 (4) | |
H4 | 0.7554 | 0.4637 | 0.2932 | 0.064* | |
C5 | 0.6523 (3) | 0.44284 (10) | 0.37826 (9) | 0.0540 (4) | |
H5 | 0.7562 | 0.4049 | 0.3882 | 0.065* | |
C6 | 0.5011 (3) | 0.46295 (10) | 0.42024 (8) | 0.0497 (4) | |
H6 | 0.5013 | 0.4393 | 0.4586 | 0.060* | |
C7 | 0.3482 (2) | 0.51935 (9) | 0.40395 (7) | 0.0389 (3) | |
C1 | 0.0600 (2) | 0.61568 (8) | 0.38384 (6) | 0.0352 (3) | |
C8 | −0.1316 (2) | 0.66515 (9) | 0.38831 (6) | 0.0361 (3) | |
C9 | −0.2413 (3) | 0.67047 (10) | 0.44268 (6) | 0.0426 (4) | |
H9 | −0.1896 | 0.6427 | 0.4764 | 0.051* | |
C10 | −0.4255 (3) | 0.71583 (10) | 0.44857 (7) | 0.0482 (4) | |
H10 | −0.4971 | 0.7194 | 0.4853 | 0.058* | |
C11 | −0.4962 (2) | 0.75501 (9) | 0.39779 (7) | 0.0423 (3) | |
C14 | −0.6822 (3) | 0.82343 (13) | 0.32904 (9) | 0.0610 (5) | |
H14A | −0.8035 | 0.7967 | 0.3110 | 0.073* | |
H14B | −0.6977 | 0.8821 | 0.3238 | 0.073* | |
C12 | −0.3898 (2) | 0.74996 (9) | 0.34317 (7) | 0.0399 (3) | |
C13 | −0.2079 (2) | 0.70649 (9) | 0.33649 (7) | 0.0395 (3) | |
H13 | −0.1373 | 0.7041 | 0.2996 | 0.047* | |
N1 | 0.17928 (19) | 0.61002 (7) | 0.33610 (5) | 0.0374 (3) | |
O1 | −0.6701 (2) | 0.80397 (8) | 0.39209 (6) | 0.0589 (3) | |
O2 | −0.49343 (19) | 0.79602 (7) | 0.30038 (5) | 0.0559 (3) | |
S1 | 0.13899 (7) | 0.55612 (3) | 0.445920 (18) | 0.05001 (14) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C2 | 0.0354 (8) | 0.0350 (7) | 0.0380 (7) | −0.0045 (6) | −0.0022 (6) | −0.0013 (5) |
C3 | 0.0491 (10) | 0.0484 (9) | 0.0426 (8) | −0.0004 (8) | 0.0053 (7) | −0.0030 (6) |
C4 | 0.0486 (10) | 0.0508 (9) | 0.0613 (11) | 0.0041 (8) | 0.0078 (8) | −0.0119 (8) |
C5 | 0.0499 (10) | 0.0412 (9) | 0.0710 (12) | 0.0092 (8) | −0.0066 (9) | −0.0042 (8) |
C6 | 0.0515 (10) | 0.0455 (8) | 0.0523 (9) | 0.0040 (8) | −0.0069 (8) | 0.0062 (7) |
C7 | 0.0387 (8) | 0.0389 (7) | 0.0391 (7) | −0.0033 (6) | −0.0013 (6) | 0.0022 (6) |
C1 | 0.0336 (7) | 0.0396 (7) | 0.0323 (6) | −0.0061 (6) | −0.0033 (6) | 0.0018 (5) |
C8 | 0.0326 (7) | 0.0390 (7) | 0.0367 (7) | −0.0043 (6) | −0.0021 (6) | −0.0033 (5) |
C9 | 0.0443 (9) | 0.0464 (8) | 0.0372 (7) | −0.0018 (7) | 0.0001 (7) | −0.0014 (6) |
C10 | 0.0477 (9) | 0.0531 (9) | 0.0439 (8) | 0.0007 (8) | 0.0093 (7) | −0.0072 (7) |
C11 | 0.0368 (8) | 0.0372 (7) | 0.0528 (8) | 0.0005 (7) | 0.0023 (7) | −0.0094 (6) |
C14 | 0.0496 (11) | 0.0653 (12) | 0.0680 (12) | 0.0174 (9) | −0.0045 (9) | −0.0032 (9) |
C12 | 0.0391 (8) | 0.0368 (7) | 0.0439 (8) | −0.0016 (7) | −0.0050 (6) | −0.0027 (6) |
C13 | 0.0381 (8) | 0.0429 (8) | 0.0375 (7) | −0.0013 (7) | 0.0011 (6) | −0.0020 (6) |
N1 | 0.0378 (7) | 0.0409 (6) | 0.0334 (6) | 0.0007 (5) | −0.0006 (5) | 0.0012 (5) |
O1 | 0.0511 (8) | 0.0612 (7) | 0.0644 (8) | 0.0187 (6) | 0.0052 (6) | −0.0041 (6) |
O2 | 0.0511 (7) | 0.0618 (7) | 0.0549 (7) | 0.0179 (6) | −0.0032 (6) | 0.0060 (5) |
S1 | 0.0452 (3) | 0.0662 (3) | 0.0386 (2) | 0.0075 (2) | 0.00557 (17) | 0.01540 (17) |
C2—C3 | 1.392 (2) | C8—C9 | 1.388 (2) |
C2—N1 | 1.3926 (18) | C8—C13 | 1.412 (2) |
C2—C7 | 1.403 (2) | C9—C10 | 1.388 (2) |
C3—C4 | 1.374 (2) | C9—H9 | 0.9300 |
C3—H3 | 0.9300 | C10—C11 | 1.365 (2) |
C4—C5 | 1.390 (3) | C10—H10 | 0.9300 |
C4—H4 | 0.9300 | C11—O1 | 1.3668 (19) |
C5—C6 | 1.372 (3) | C11—C12 | 1.383 (2) |
C5—H5 | 0.9300 | C14—O2 | 1.424 (2) |
C6—C7 | 1.384 (2) | C14—O1 | 1.428 (2) |
C6—H6 | 0.9300 | C14—H14A | 0.9700 |
C7—S1 | 1.7243 (16) | C14—H14B | 0.9700 |
C1—N1 | 1.2991 (18) | C12—C13 | 1.361 (2) |
C1—C8 | 1.461 (2) | C12—O2 | 1.3731 (18) |
C1—S1 | 1.7517 (14) | C13—H13 | 0.9300 |
C3—C2—N1 | 125.86 (13) | C10—C9—H9 | 118.8 |
C3—C2—C7 | 118.93 (14) | C8—C9—H9 | 118.8 |
N1—C2—C7 | 115.20 (13) | C11—C10—C9 | 116.70 (14) |
C4—C3—C2 | 118.99 (15) | C11—C10—H10 | 121.7 |
C4—C3—H3 | 120.5 | C9—C10—H10 | 121.7 |
C2—C3—H3 | 120.5 | C10—C11—O1 | 127.88 (15) |
C3—C4—C5 | 121.33 (16) | C10—C11—C12 | 121.77 (15) |
C3—C4—H4 | 119.3 | O1—C11—C12 | 110.34 (14) |
C5—C4—H4 | 119.3 | O2—C14—O1 | 108.49 (14) |
C6—C5—C4 | 120.75 (16) | O2—C14—H14A | 110.0 |
C6—C5—H5 | 119.6 | O1—C14—H14A | 110.0 |
C4—C5—H5 | 119.6 | O2—C14—H14B | 110.0 |
C5—C6—C7 | 118.21 (15) | O1—C14—H14B | 110.0 |
C5—C6—H6 | 120.9 | H14A—C14—H14B | 108.4 |
C7—C6—H6 | 120.9 | C13—C12—O2 | 128.00 (14) |
C6—C7—C2 | 121.78 (15) | C13—C12—C11 | 122.54 (14) |
C6—C7—S1 | 129.07 (12) | O2—C12—C11 | 109.44 (13) |
C2—C7—S1 | 109.16 (11) | C12—C13—C8 | 116.84 (14) |
N1—C1—C8 | 125.25 (13) | C12—C13—H13 | 121.6 |
N1—C1—S1 | 115.30 (11) | C8—C13—H13 | 121.6 |
C8—C1—S1 | 119.43 (10) | C1—N1—C2 | 110.70 (12) |
C9—C8—C13 | 119.81 (14) | C11—O1—C14 | 105.23 (13) |
C9—C8—C1 | 120.58 (13) | C12—O2—C14 | 105.57 (13) |
C13—C8—C1 | 119.60 (13) | C7—S1—C1 | 89.62 (7) |
C10—C9—C8 | 122.34 (14) | ||
N1—C2—C3—C4 | −178.02 (14) | O1—C11—C12—C13 | 178.48 (13) |
C7—C2—C3—C4 | 1.1 (2) | C10—C11—C12—O2 | −179.03 (14) |
C2—C3—C4—C5 | −1.0 (3) | O1—C11—C12—O2 | 0.01 (18) |
C3—C4—C5—C6 | 0.4 (3) | O2—C12—C13—C8 | 178.89 (14) |
C4—C5—C6—C7 | 0.2 (3) | C11—C12—C13—C8 | 0.7 (2) |
C5—C6—C7—C2 | −0.1 (2) | C9—C8—C13—C12 | −0.3 (2) |
C5—C6—C7—S1 | 179.51 (13) | C1—C8—C13—C12 | 178.46 (13) |
C3—C2—C7—C6 | −0.5 (2) | C8—C1—N1—C2 | −178.07 (12) |
N1—C2—C7—C6 | 178.66 (14) | S1—C1—N1—C2 | 0.36 (15) |
C3—C2—C7—S1 | 179.79 (12) | C3—C2—N1—C1 | 179.57 (14) |
N1—C2—C7—S1 | −1.03 (16) | C7—C2—N1—C1 | 0.45 (17) |
N1—C1—C8—C9 | −176.37 (14) | C10—C11—O1—C14 | −175.20 (17) |
S1—C1—C8—C9 | 5.26 (19) | C12—C11—O1—C14 | 5.84 (18) |
N1—C1—C8—C13 | 4.9 (2) | O2—C14—O1—C11 | −9.44 (19) |
S1—C1—C8—C13 | −173.44 (11) | C13—C12—O2—C14 | 175.75 (16) |
C13—C8—C9—C10 | −0.4 (2) | C11—C12—O2—C14 | −5.88 (18) |
C1—C8—C9—C10 | −179.06 (14) | O1—C14—O2—C12 | 9.48 (19) |
C8—C9—C10—C11 | 0.5 (2) | C6—C7—S1—C1 | −178.68 (15) |
C9—C10—C11—O1 | −178.94 (14) | C2—C7—S1—C1 | 0.98 (11) |
C9—C10—C11—C12 | −0.1 (2) | N1—C1—S1—C7 | −0.81 (12) |
C10—C11—C12—C13 | −0.6 (2) | C8—C1—S1—C7 | 177.71 (11) |
Cg1 is the centroid of the dioxole ring and Cg2 is the centroid of the C2–C7 benzene ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C5—H5···Cg1i | 0.93 | 2.79 | 3.624 (2) | 150 |
C14—H14B···Cg2ii | 0.97 | 2.84 | 3.580 (2) | 134 |
Symmetry codes: (i) x, −y−3/2, z−1/2; (ii) x−1, −y−1/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | C14H9NO2S |
Mr | 255.28 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 293 |
a, b, c (Å) | 6.3356 (2), 16.3222 (5), 22.0471 (7) |
V (Å3) | 2279.91 (12) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.28 |
Crystal size (mm) | 0.25 × 0.23 × 0.18 |
Data collection | |
Diffractometer | Bruker APEXII CCD |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.934, 0.952 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 15338, 3135, 2243 |
Rint | 0.027 |
(sin θ/λ)max (Å−1) | 0.693 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.039, 0.105, 1.02 |
No. of reflections | 3135 |
No. of parameters | 163 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.29, −0.24 |
Computer programs: APEX2 (Bruker, 2004), APEX2 and SAINT (Bruker, 2004), SAINT and XPREP (Bruker, 2004), SHELXS97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997), SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).
Cg1 is the centroid of the dioxole ring and Cg2 is the centroid of the C2–C7 benzene ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C5—H5···Cg1i | 0.93 | 2.79 | 3.624 (2) | 150 |
C14—H14B···Cg2ii | 0.97 | 2.84 | 3.580 (2) | 134 |
Symmetry codes: (i) x, −y−3/2, z−1/2; (ii) x−1, −y−1/2, z−1/2. |
Footnotes
‡Additional correspondence author, e-mail: bhakthadoss@yahoo.com.
Acknowledgements
The authors thank Dr Babu Vargheese, SAIF, IIT, Madras, India, for his help with the data collection.
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Zhang, Y., Su, Z.-H., Wang, Q.-Z. & Teng, L. (2008). Acta Cryst. E64, o2065. Web of Science CSD CrossRef IUCr Journals Google Scholar
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Benzothiazoles are remarkable heterocyclic ring systems. They possess therapeutic value, are synthetic intermediates in the preparation of medicinal compounds and find numerous applications in chemical industry (Bradshaw et al., 2002; Hutchinson et al., 2002; Delmas et al., 2002). Benzothiazole nucleus is associated with several pharmacological activities such as anti-tumor (Repiĉ et al., 2001) and antimicrobial (Schwartz et al., 1992). In view of this biological importance, the crystal structure of the title compound has been determined and the results are presented here.
Fig. 1. shows a displacement ellipsoid plot of (I), with the atom numbering scheme. The benzothiazole moiety is essentially planar [maximum deviation = -0.016 (1) Å for the C14 atom] and lies at an angle 7.1 (1)° with respect to the benzodioxole unit. The dioxole (O1/O2/C11/C12/C14) ring adopts an envelope conformation with the C14 (displacement = 0.03 (18) Å) atom as the flap atom and with puckering parameters (Cremer & Pople, 1975), q2 = 0.0882 (16) Å and φ2 = 143.8 (1)°. The geometric parameters of the title molecule agree well with those reported for similar structures (Baryala et al., 2010; Zhang et al., 2008).
The crystal packing is stabilized by π—π interactions with Cg3···Cg4i and Cg1···Cg4i seperations of 3.705 (1) Å and 3.752 (1) Å, respectively (Fig. 2; Cg1, Cg3 and Cg4 are the centroids of the N1/S1/C1/C2/C7 thiazole ring, C2–C7 benzene ring and C8–C13 benzene ring, respectively, symmetry code as in Fig. 2). The crystal packing (Fig. 3) is further stabilized by a short contact S1···S1iii [3.485 (1) Å; symmetry code: (iii) = -x, 1 - y, 1 - z], which is shorter than the sum of the van der Waals radii of these atoms [3.60 Å].