organic compounds
9H-Carbazole-9-carbothioic dithioperoxyanhydride
aDepartment of Chemistry, Namık Kemal University, 59030 Değirmenaltı, Tekirdağ, Turkey, bDepartment of Physics, Sakarya University, 54187 Esentepe, Sakarya, Turkey, cDepartment of Physics, Dicle University, 21280 Sur, Diyarbakır, Turkey, and dDepartment of Physics, Hacettepe University, 06800 Beytepe, Ankara, Turkey
*Correspondence e-mail: merzifon@hacettepe.edu.tr
The whole molecule of the title compound, C26H16N2S4, is generated by twofold rotational symmetry. The carbazole skeleton is nearly planar [maximum deviation = 0.054 (5) Å]. In the crystal, aromatic π–π stacking is observed between parallel carbazole ring systems of adjacent molecules, the shortest centroid–centroid distances between pyrrole and benzene rings being 3.948 (3) and 3.751 (3) Å.
Related literature
For tetrahydrocarbazole systems present in the framework of a number of indole-type ). For related structures, see: Hökelek et al. (1994, 1998, 1999); Patır et al. (1997); Hökelek & Patır (1999). For hole-transporting mobility of charge carriers, see: Cloutet et al. (1999). For efficiencies, see: Zhenhong et al. (2006). For electroluminescent applications, see: Tirapattur et al. (2003). For photoactive devices, see: Taoudi et al. (2001). For sensors and rechargable batteries, see: Saraswathi et al. (1999). For electrochromic displays, see: Sarac et al. (2000).
of biological interest, see: Saxton (1983Experimental
Crystal data
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Data collection: APEX2 (Bruker, 2007); cell SAINT (Bruker, 2007); 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, 2012); software used to prepare material for publication: WinGX (Farrugia, 2012) and PLATON (Spek, 2009).
Supporting information
https://doi.org/10.1107/S1600536813010349/su2587sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536813010349/su2587Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536813010349/su2587Isup3.cml
Carbazole (0.80 g, 5 mmol) was added to a suspension of KOH (0.28 g, 20 mmol) in DMSO (20 ml) under vigorous stirring. The reaction mixture was stirred overnight at room temperature under O2. Carbon disulfide (0.40 g, 5 mmol) was added drop wise, and then the mixture stirred for 10 h at room temperature. The resultant reaction mixture was poured into a large amount of deionized water. The solid obtained was filtered and purified by recrystallization from diethyl ether [yield: 1.30 g, 50%], yielding rod-shaped orange crystals.
The C-bound H-atoms were positioned geometrically and treated as riding atoms: C—H = 0.93 Å with Uiso(H) = 1.2Ueq(C).
Tetrahydrocarbazole systems are present in the framework of a number of indole-type
of biological interest (Saxton, 1983). The structures of tricyclic, tetracyclic and pentacyclic ring systems with dithiolane and other substituents of the tetrahydrocarbazole core, have been reported previously (Hökelek et al., 1994; Patır et al., 1997; Hökelek et al., 1998; Hökelek et al., 1999; Hökelek & Patır, 1999). Substituted carbazole based monomers exhibit good electroactive and photoactive properties which make them the most promising candidates for hole transporting mobility of charge carriers (Cloutet et al., 1999) and efficiencies (Zhenhong et al., 2006). Carbazole based heterocyclic polymer systems can be chemically or electrochemically polymerized to yield materials with interesting properties with a number of applications, such as electroluminescent (Tirapattur et al., 2003), photoactive devices (Taoudi et al., 2001), sensors and rechargable batteries (Saraswathi et al., 1999) and electrochromic displays (Sarac et al., 2000). The title compound, (I), may be considered as a synthetic precursor of tetracyclic indole of biological interests. The present study was undertaken to ascertain its crystal structure.The
of the title compound contains one half of the molecule, the whole molecule being generated by two-fold rotational symmetry (Fig. 1). It consists of a carbazole skeleton with a dithioperoxyanhydride group , where the bond lengths and angles are within normal ranges, and generally agree with those in the previously reported compounds (Hökelek et al., 1994; Patır et al., 1997; Hökelek et al., 1998; Hökelek et al., 1999; Hökelek & Patır, 1999) in all of which atom N9 is substituted.An examination of the deviations from the mean planes through individual rings shows that rings A (C1-C4/C4a/C9a), B (C4a/C5a/C8a/N9/C9a) and C (C5a/C5-C8/C8a) are planar [symmetry code: (a) x, -y+1, -z]. The carbazole skeleton, containing rings A, B and C is also nearly coplanar [maximum deviation of -0.054 (5) Å for atom C8] with dihedral angles of A/B = 3.80 (15), A/C = 3.74 (17) and B/C = 3.21 (16) °. Atoms S1, S2 and C10 are displaced by 1.4738 (13), -0.5052 (15) and 0.2107 (42) Å from the mean plane of the carbazole skeleton.
In the crystal, molecules are stacked nearly parallel to (110) [Fig. 2]. The π–π contacts between the pyrrole and benzene rings, Cg1—Cg2i and Cg1···Cg3ii [symmetry codes: (i) x + 1, y, z; (ii) x - 1, y, z; where Cg1, Cg2 and Cg3 are centroids of the rings A (C1-C4/C4a/C9a), B (C4a/C5a/C8a/N9/C9a) and C (C5a/C5-C8/C8a), respectively] may stabilize the structure, with centroid-centroid distances of 3.948 (3) and 3.751 (3) Å, respectively.
For tetrahydrocarbazole systems present in the framework of a number of indole-type
of biological interest, see: Saxton (1983). For related structures, see: Hökelek et al. (1994, 1998, 1999); Patır et al. (1997); Hökelek & Patır (1999). For hole-transporting mobility of charge carriers, see: Cloutet et al. (1999). For efficiencies, see: Zhenhong et al. (2006). For electroluminescent applications, see: Tirapattur et al. (2003). For photoactive devices, see: Taoudi et al. (2001). For sensors and rechargable batteries, see: Saraswathi et al. (1999). For electrochromic displays, see: Sarac et al. (2000).Data collection: APEX2 (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); 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, 2012); software used to prepare material for publication: WinGX (Farrugia, 2012) and PLATON (Spek, 2009).C26H16N2S4 | F(000) = 500 |
Mr = 484.69 | Dx = 1.514 Mg m−3 |
Orthorhombic, P22121 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2bc 2 | Cell parameters from 2694 reflections |
a = 3.9207 (2) Å | θ = 6.2–28.7° |
b = 14.9355 (4) Å | µ = 0.47 mm−1 |
c = 18.1494 (5) Å | T = 294 K |
V = 1062.79 (7) Å3 | Rod, orange |
Z = 2 | 0.35 × 0.15 × 0.10 mm |
Bruker Kappa APEXII CCD area-detector diffractometer | 4100 independent reflections |
Radiation source: fine-focus sealed tube | 2471 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.036 |
φ and ω scans | θmax = 35.1°, θmin = 6.0° |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | h = −6→6 |
Tmin = 0.920, Tmax = 0.954 | k = −23→10 |
5384 measured reflections | l = −27→18 |
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)] = 0.072 | H-atom parameters constrained |
wR(F2) = 0.156 | w = 1/[σ2(Fo2) + (0.P)2 + 0.892P] where P = (Fo2 + 2Fc2)/3 |
S = 1.41 | (Δ/σ)max < 0.001 |
4100 reflections | Δρmax = 0.35 e Å−3 |
145 parameters | Δρmin = −0.47 e Å−3 |
0 restraints | Absolute structure: Flack (1983), 1548 Friedel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: 0.04 (18) |
C26H16N2S4 | V = 1062.79 (7) Å3 |
Mr = 484.69 | Z = 2 |
Orthorhombic, P22121 | Mo Kα radiation |
a = 3.9207 (2) Å | µ = 0.47 mm−1 |
b = 14.9355 (4) Å | T = 294 K |
c = 18.1494 (5) Å | 0.35 × 0.15 × 0.10 mm |
Bruker Kappa APEXII CCD area-detector diffractometer | 4100 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 2471 reflections with I > 2σ(I) |
Tmin = 0.920, Tmax = 0.954 | Rint = 0.036 |
5384 measured reflections |
R[F2 > 2σ(F2)] = 0.072 | H-atom parameters constrained |
wR(F2) = 0.156 | Δρmax = 0.35 e Å−3 |
S = 1.41 | Δρmin = −0.47 e Å−3 |
4100 reflections | Absolute structure: Flack (1983), 1548 Friedel pairs |
145 parameters | Absolute structure parameter: 0.04 (18) |
0 restraints |
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 > 2sigma(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 | 0.3301 (3) | 0.43540 (7) | 0.01656 (7) | 0.0393 (3) | |
S2 | 0.0207 (4) | 0.53764 (7) | 0.14312 (8) | 0.0452 (3) | |
C1 | −0.0287 (13) | 0.2527 (3) | 0.0425 (3) | 0.0379 (10) | |
H1 | −0.0916 | 0.2958 | 0.0082 | 0.046* | |
C2 | −0.0674 (12) | 0.1620 (3) | 0.0281 (3) | 0.0446 (12) | |
H2 | −0.1545 | 0.1440 | −0.0172 | 0.054* | |
C3 | 0.0206 (17) | 0.0976 (3) | 0.0796 (3) | 0.0511 (13) | |
H3 | −0.0077 | 0.0374 | 0.0683 | 0.061* | |
C4 | 0.1490 (13) | 0.1216 (3) | 0.1470 (3) | 0.0466 (12) | |
H4 | 0.2048 | 0.0781 | 0.1817 | 0.056* | |
C4A | 0.1946 (11) | 0.2119 (3) | 0.1629 (2) | 0.0335 (10) | |
C5 | 0.4408 (13) | 0.2274 (3) | 0.2947 (3) | 0.0437 (12) | |
H5 | 0.4660 | 0.1664 | 0.3034 | 0.052* | |
C5A | 0.3077 (12) | 0.2574 (3) | 0.2285 (2) | 0.0337 (10) | |
C6 | 0.5352 (14) | 0.2884 (3) | 0.3473 (3) | 0.0489 (13) | |
H6 | 0.6241 | 0.2686 | 0.3920 | 0.059* | |
C7 | 0.4988 (16) | 0.3796 (3) | 0.3344 (3) | 0.0493 (13) | |
H7 | 0.5621 | 0.4200 | 0.3709 | 0.059* | |
C8 | 0.3715 (13) | 0.4114 (3) | 0.2690 (3) | 0.0436 (12) | |
H8 | 0.3502 | 0.4726 | 0.2606 | 0.052* | |
C8A | 0.2759 (11) | 0.3501 (3) | 0.2160 (2) | 0.0313 (9) | |
N9 | 0.1597 (9) | 0.3628 (2) | 0.1418 (2) | 0.0331 (8) | |
C9A | 0.1079 (10) | 0.2763 (3) | 0.1103 (3) | 0.0306 (10) | |
C10 | 0.1482 (11) | 0.4442 (3) | 0.1066 (2) | 0.0316 (9) |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0498 (6) | 0.0332 (5) | 0.0351 (6) | 0.0087 (5) | 0.0081 (6) | 0.0058 (5) |
S2 | 0.0588 (7) | 0.0339 (5) | 0.0428 (7) | 0.0065 (6) | 0.0051 (7) | −0.0033 (5) |
C1 | 0.042 (2) | 0.035 (2) | 0.037 (3) | 0.001 (2) | −0.004 (2) | 0.0022 (19) |
C2 | 0.050 (3) | 0.042 (2) | 0.042 (3) | −0.002 (2) | −0.008 (2) | −0.007 (2) |
C3 | 0.070 (4) | 0.031 (2) | 0.052 (3) | −0.001 (3) | −0.003 (3) | −0.002 (2) |
C4 | 0.060 (3) | 0.032 (2) | 0.048 (3) | 0.003 (2) | −0.004 (3) | 0.009 (2) |
C4A | 0.033 (2) | 0.036 (2) | 0.032 (3) | 0.0024 (18) | 0.003 (2) | 0.0052 (18) |
C5 | 0.045 (3) | 0.047 (3) | 0.038 (3) | 0.002 (2) | −0.001 (2) | 0.010 (2) |
C5A | 0.032 (2) | 0.039 (2) | 0.029 (3) | 0.0000 (19) | 0.003 (2) | 0.0060 (19) |
C6 | 0.048 (3) | 0.067 (3) | 0.031 (3) | −0.004 (3) | −0.008 (3) | 0.012 (3) |
C7 | 0.054 (3) | 0.060 (3) | 0.034 (3) | −0.013 (3) | −0.003 (3) | 0.000 (2) |
C8 | 0.053 (3) | 0.043 (2) | 0.035 (3) | −0.010 (2) | −0.003 (2) | −0.001 (2) |
C8A | 0.029 (2) | 0.038 (2) | 0.027 (2) | −0.0021 (17) | 0.0025 (18) | 0.0039 (18) |
N9 | 0.0412 (19) | 0.0308 (16) | 0.0272 (19) | −0.0019 (15) | −0.002 (2) | 0.0029 (16) |
C9A | 0.032 (2) | 0.0288 (19) | 0.031 (2) | −0.0005 (15) | 0.0008 (18) | 0.0013 (18) |
C10 | 0.031 (2) | 0.033 (2) | 0.031 (2) | −0.0012 (17) | 0.0003 (19) | 0.0034 (18) |
S1—S1i | 2.021 (2) | C5—H5 | 0.9300 |
S1—C10 | 1.787 (4) | C5A—C4A | 1.441 (6) |
S2—C10 | 1.624 (4) | C5A—C5 | 1.384 (6) |
C1—C9A | 1.387 (6) | C5A—C8A | 1.409 (6) |
C1—H1 | 0.9300 | C6—H6 | 0.9300 |
C2—C1 | 1.388 (6) | C7—C6 | 1.390 (7) |
C2—C3 | 1.384 (7) | C7—C8 | 1.373 (7) |
C2—H2 | 0.9300 | C7—H7 | 0.9300 |
C3—H3 | 0.9300 | C8—H8 | 0.9300 |
C4—C3 | 1.371 (7) | C8A—C8 | 1.380 (6) |
C4—H4 | 0.9300 | N9—C8A | 1.433 (6) |
C4A—C4 | 1.391 (6) | N9—C9A | 1.428 (5) |
C4A—C9A | 1.397 (6) | N9—C10 | 1.375 (5) |
C5—C6 | 1.370 (7) | ||
C10—S1—S1i | 101.63 (15) | C5—C6—C7 | 120.4 (5) |
C2—C1—H1 | 121.4 | C5—C6—H6 | 119.8 |
C9A—C1—C2 | 117.2 (4) | C7—C6—H6 | 119.8 |
C9A—C1—H1 | 121.4 | C6—C7—H7 | 119.2 |
C1—C2—H2 | 119.2 | C8—C7—C6 | 121.5 (5) |
C3—C2—C1 | 121.6 (5) | C8—C7—H7 | 119.2 |
C3—C2—H2 | 119.2 | C7—C8—C8A | 118.2 (5) |
C2—C3—H3 | 119.6 | C7—C8—H8 | 120.9 |
C4—C3—C2 | 120.9 (4) | C8A—C8—H8 | 120.9 |
C4—C3—H3 | 119.6 | C5A—C8A—N9 | 108.1 (4) |
C3—C4—C4A | 119.0 (4) | C8—C8A—N9 | 130.8 (4) |
C3—C4—H4 | 120.5 | C8—C8A—C5A | 121.0 (4) |
C4A—C4—H4 | 120.5 | C9A—N9—C8A | 107.5 (3) |
C4—C4A—C5A | 131.9 (4) | C10—N9—C8A | 124.4 (3) |
C4—C4A—C9A | 119.7 (4) | C10—N9—C9A | 127.5 (4) |
C9A—C4A—C5A | 108.3 (4) | C1—C9A—N9 | 129.8 (4) |
C5A—C5—H5 | 120.3 | C1—C9A—C4A | 121.7 (4) |
C6—C5—C5A | 119.5 (4) | C4A—C9A—N9 | 108.4 (4) |
C6—C5—H5 | 120.3 | S2—C10—S1 | 124.0 (2) |
C5—C5A—C4A | 132.9 (4) | N9—C10—S1 | 110.3 (3) |
C5—C5A—C8A | 119.4 (4) | N9—C10—S2 | 125.4 (3) |
C8A—C5A—C4A | 107.6 (4) | ||
S1i—S1—C10—S2 | 1.3 (3) | C4A—C5A—C8A—N9 | −2.8 (5) |
S1i—S1—C10—N9 | −173.6 (3) | C4A—C5A—C8A—C8 | −178.8 (4) |
C2—C1—C9A—C4A | −1.7 (7) | C5—C5A—C8A—N9 | 175.2 (4) |
C2—C1—C9A—N9 | −176.2 (5) | C5—C5A—C8A—C8 | −0.8 (7) |
C3—C2—C1—C9A | 1.1 (7) | C8—C7—C6—C5 | −0.6 (9) |
C1—C2—C3—C4 | 0.2 (9) | C6—C7—C8—C8A | 0.7 (8) |
C4A—C4—C3—C2 | −0.9 (9) | N9—C8A—C8—C7 | −175.0 (5) |
C5A—C4A—C4—C3 | 176.9 (5) | C5A—C8A—C8—C7 | 0.0 (7) |
C9A—C4A—C4—C3 | 0.3 (7) | C9A—N9—C8A—C5A | 2.3 (5) |
C4—C4A—C9A—C1 | 1.1 (7) | C9A—N9—C8A—C8 | 177.8 (5) |
C4—C4A—C9A—N9 | 176.6 (4) | C10—N9—C8A—C5A | −169.8 (4) |
C5A—C4A—C9A—C1 | −176.3 (4) | C10—N9—C8A—C8 | 5.7 (7) |
C5A—C4A—C9A—N9 | −0.8 (5) | C8A—N9—C9A—C1 | 174.1 (4) |
C5A—C5—C6—C7 | −0.2 (8) | C8A—N9—C9A—C4A | −0.9 (5) |
C5—C5A—C4A—C4 | 7.6 (10) | C10—N9—C9A—C1 | −14.1 (7) |
C5—C5A—C4A—C9A | −175.4 (5) | C10—N9—C9A—C4A | 170.9 (4) |
C8A—C5A—C4A—C4 | −174.7 (5) | C8A—N9—C10—S1 | 132.7 (4) |
C8A—C5A—C4A—C9A | 2.2 (5) | C8A—N9—C10—S2 | −42.1 (6) |
C4A—C5A—C5—C6 | 178.3 (5) | C9A—N9—C10—S1 | −37.7 (5) |
C8A—C5A—C5—C6 | 0.9 (7) | C9A—N9—C10—S2 | 147.4 (4) |
Symmetry code: (i) x, −y+1, −z. |
Experimental details
Crystal data | |
Chemical formula | C26H16N2S4 |
Mr | 484.69 |
Crystal system, space group | Orthorhombic, P22121 |
Temperature (K) | 294 |
a, b, c (Å) | 3.9207 (2), 14.9355 (4), 18.1494 (5) |
V (Å3) | 1062.79 (7) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.47 |
Crystal size (mm) | 0.35 × 0.15 × 0.10 |
Data collection | |
Diffractometer | Bruker Kappa APEXII CCD area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.920, 0.954 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5384, 4100, 2471 |
Rint | 0.036 |
(sin θ/λ)max (Å−1) | 0.808 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.072, 0.156, 1.41 |
No. of reflections | 4100 |
No. of parameters | 145 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.35, −0.47 |
Absolute structure | Flack (1983), 1548 Friedel pairs |
Absolute structure parameter | 0.04 (18) |
Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 2012), WinGX (Farrugia, 2012) and PLATON (Spek, 2009).
Acknowledgements
The authors are indebted to Dicle University Scientific and Technological Applied and Research Center, Diyarbakır, Turkey, for use of the X-ray diffractometer.
References
Bruker (2005). SADABS. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Bruker (2007). APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Cloutet, E., Yammine, P., Ades, D. & Siove, A. (1999). Synth. Met. 102, 1302–1303. Web of Science CrossRef CAS Google Scholar
Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849–854. Web of Science CrossRef CAS IUCr Journals Google Scholar
Flack, H. D. (1983). Acta Cryst. A39, 876–881. CrossRef CAS Web of Science IUCr Journals Google Scholar
Hökelek, T., Gündüz, H., Patir, S. & Uludaug, N. (1998). Acta Cryst. C54, 1297–1299. Web of Science CSD CrossRef IUCr Journals Google Scholar
Hökelek, T. & Patir, S. (1999). Acta Cryst. C55, 675–677. Web of Science CSD CrossRef IUCr Journals Google Scholar
Hökelek, T., Patır, S., Gülce, A. & Okay, G. (1994). Acta Cryst. C50, 450–453. CSD CrossRef Web of Science IUCr Journals Google Scholar
Hökelek, T., Patir, S. & Uludauğ, N. (1999). Acta Cryst. C55, 114–116. Web of Science CSD CrossRef IUCr Journals Google Scholar
Patır, S., Okay, G., Gülce, A., Salih, B. & Hökelek, T. (1997). J. Heterocycl. Chem. 34, 1239–1242. CAS Google Scholar
Sarac, A. S., Yavuz, O. & Sezer, E. (2000). Polymer, 41, 839–847. CAS Google Scholar
Saraswathi, R., Gerard, M. & Malhotra, B. D. (1999). J. Appl. Polym. Sci. 74, 145–150. CrossRef CAS Google Scholar
Saxton, J. E. (1983). Editor. Heterocyclic Compounds Vol. 25, The Monoterpenoid Indole Alkaloids, chs. 8 and 11. New York: Wiley. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Spek, A. L. (2009). Acta Cryst. D65, 148–155. Web of Science CrossRef CAS IUCr Journals Google Scholar
Taoudi, H., Bernede, J. C., Del Valle, M. A., Bonnet, A. & Morsli, M. (2001). J. Mater. Sci. 36, 631–634. Web of Science CrossRef CAS Google Scholar
Tirapattur, S., Belletete, M., Drolet, N., Leclerc, M. & Durocher, G. (2003). Chem. Phys. Lett. 370, 799–804. Web of Science CrossRef CAS Google Scholar
Zhenhong, W., Jingkun, X., Guangming, N., Yukou, D. & Shouzhi, P. (2006). J. Electroanal. Chem. 589, 112–119. Google Scholar
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Tetrahydrocarbazole systems are present in the framework of a number of indole-type alkaloids of biological interest (Saxton, 1983). The structures of tricyclic, tetracyclic and pentacyclic ring systems with dithiolane and other substituents of the tetrahydrocarbazole core, have been reported previously (Hökelek et al., 1994; Patır et al., 1997; Hökelek et al., 1998; Hökelek et al., 1999; Hökelek & Patır, 1999). Substituted carbazole based monomers exhibit good electroactive and photoactive properties which make them the most promising candidates for hole transporting mobility of charge carriers (Cloutet et al., 1999) and photoluminescence efficiencies (Zhenhong et al., 2006). Carbazole based heterocyclic polymer systems can be chemically or electrochemically polymerized to yield materials with interesting properties with a number of applications, such as electroluminescent (Tirapattur et al., 2003), photoactive devices (Taoudi et al., 2001), sensors and rechargable batteries (Saraswathi et al., 1999) and electrochromic displays (Sarac et al., 2000). The title compound, (I), may be considered as a synthetic precursor of tetracyclic indole alkaloids of biological interests. The present study was undertaken to ascertain its crystal structure.
The asymmetric unit of the title compound contains one half of the molecule, the whole molecule being generated by two-fold rotational symmetry (Fig. 1). It consists of a carbazole skeleton with a dithioperoxyanhydride group , where the bond lengths and angles are within normal ranges, and generally agree with those in the previously reported compounds (Hökelek et al., 1994; Patır et al., 1997; Hökelek et al., 1998; Hökelek et al., 1999; Hökelek & Patır, 1999) in all of which atom N9 is substituted.
An examination of the deviations from the mean planes through individual rings shows that rings A (C1-C4/C4a/C9a), B (C4a/C5a/C8a/N9/C9a) and C (C5a/C5-C8/C8a) are planar [symmetry code: (a) x, -y+1, -z]. The carbazole skeleton, containing rings A, B and C is also nearly coplanar [maximum deviation of -0.054 (5) Å for atom C8] with dihedral angles of A/B = 3.80 (15), A/C = 3.74 (17) and B/C = 3.21 (16) °. Atoms S1, S2 and C10 are displaced by 1.4738 (13), -0.5052 (15) and 0.2107 (42) Å from the mean plane of the carbazole skeleton.
In the crystal, molecules are stacked nearly parallel to (110) [Fig. 2]. The π–π contacts between the pyrrole and benzene rings, Cg1—Cg2i and Cg1···Cg3ii [symmetry codes: (i) x + 1, y, z; (ii) x - 1, y, z; where Cg1, Cg2 and Cg3 are centroids of the rings A (C1-C4/C4a/C9a), B (C4a/C5a/C8a/N9/C9a) and C (C5a/C5-C8/C8a), respectively] may stabilize the structure, with centroid-centroid distances of 3.948 (3) and 3.751 (3) Å, respectively.