organic compounds
2-[2-(Methylsulfanyl)benzimidazol-1-yl]ethanol
aLaboratoire de Cristallographie et Physique Moléculaire, UFR SSMT, Université de Cocody 22 BP 582 Abidjan 22, Côte d'Ivoire, and bLaboratoire de Chimie Organique, UFR SSMT, Université de Cocody 22 BP 582 Abidjan 22, Côte d'Ivoire
*Correspondence e-mail: ludovic.akonan@gmail.com
In the title compound, C10H12N2OS, the consists of two independent molecules. In the molecules form R44(28) centrosymmetric tetramers via O—H⋯N hydrogen bonds. These tetramers are stacked along the c axis via C—H⋯O hydrogen bonds. C—H⋯π and π–π interactions are also present; in the latter, the centroid–centroid distances are 4.075 (1) and 3.719 (1) Å.
Related literature
For the biological activity of compounds having benzimidazole ring systems, and a related structure, see: Akkurt et al. (2006). For other studies of the biological activity of benzimidazoles, see: Küçükbay et al. (2003), (2004); Puratchikody et al. (2008). For hydrogen-bond graph sets, see: Bernstein et al. (1995).
Experimental
Crystal data
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Data collection
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Refinement
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Data collection: COLLECT (Nonius, 2001); cell DENZO/SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO/SCALEPACK; program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: CRYSTALS (Betteridge et al., 2003); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: CRYSTALS.
Supporting information
https://doi.org/10.1107/S1600536810001960/wn2372sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810001960/wn2372Isup2.hkl
2-Chloroethanol (1.6 ml, 24.4 mmol) and potasium carbonate (1.68 g, 12.2 mmol) were added to 2-methylsulfanyl-1H-benzimidazole (1 g, 6.1 mmol) in dimethyl sulfoxide (DMSO) (5 ml). The reaction mixture was successively agitated for 30 min at room temperature and at 323 K for 24 h. 50 ml of water was then added to the reaction mixture, and the products were extracted with dichloromethane (3 × 50 ml). The combined organic extracts were washed with brine (10 g of sodium chloride in 100 ml of water), dried (Na2SO4) and evaporated under reduced pressure. The residue was purified by
on silica gel (elution: hexane/ethyl acetate (70:30, v/v)) and the title compound resulted as a brown powder (0.77 g, 61%) with a melting point of 409 K. The brown powder was dissolved in ethanol/hexane (3:1, v/v) and, after four days, brown crystals suitable for single-crystal X-ray were obtained.The H atoms bonded to O1A and O1B were located in a difference Fourier map; their positional parameters and Uiso were refined freely. Other H atoms were placed at calculated positions, with C—H = 0.95 Å and refined using a riding model, with Uiso(H) constrained to be 1.2Ueq(C).
Numerous compounds having benzimidazole ring systems possess versatile pharmacological activities such as antiviral, anthelmintic, spasmolytic, antihypertensive and vasodilator (Akkurt et al., 2006). It has also been reported that many benzimidazole derivatives have antimicrobial and antifungal activities (Küçükbay et al., 2003, 2004, Puratchikody et al., 2008). Therefore, the synthesis of new benzimidazole derivatives is of considerable interest. In order to explore new benzimidazole properties, the title compound has been synthesized and its
determined.The two independent molecules in the
of the title compound and the atomic labeling scheme are shown in Fig.1. In this structure, the nine-membered benzimidazole ring systems (N1A/C3A/N2A/C6A/C7A/C8A/C9A/C10A/C5A, N1B/C3B/N2B/C6B/C7B/C8B/C9B/C10B/C5B) of both independent molecules are essentially planar, the maximum deviation from planarity being, respectively, 0.016 (2) Å for atom C8A and 0.078 (16) Å for atom C3B. These two ring systems make a dihedral angle of 73.95 (6)°.In the π interactions (Table 1) and π–π stacking between two parallel imidazole rings. The centroid···centroid distance of those rings, Cg1···Cg1(1 - x,1 - y,1 - z) and Cg4···Cg4(-x,2 - y,-z) are 4.075 (1) Å and 3.719 (1) Å, respectively (Fig.3).
we observe the formation of R44(28) centrosymmetric tetramers (Bernstein et al., 1995) via O—H···N hydrogen bonds. The tetramers are linked by two symmetric C—H···O hydrogen bonds to form a zigzag infinite chain along the c axis. The supramolecular aggregation is completed by the presence of C—H···For the biological activity of compounds having benzimidazole ring systems, and a related structure, see: Akkurt et al. (2006). For other studies of the biological activity of benzimidazoles, see: Küçükbay et al. (2003), (2004); Puratchikody et al. (2008). For hydrogen-bond graph sets, see: Bernstein et al. (1995).
Data collection: COLLECT (Nonius, 2001); cell
DENZO/SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO/SCALEPACK (Otwinowski & Minor, 1997); program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: CRYSTALS (Betteridge et al., 2003); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: CRYSTALS (Betteridge et al., 2003).Fig. 1. The structure of the asymmetric unit of the title compound, showing the atomic labeling scheme, with displacement ellipsoids drawn at the 50% probability level. H atoms are shown as spheres of arbitrary radius. | |
Fig. 2. Crystal packing, viewed down the a axis, showing the zigzag infinite chain of cyclic tetramers along the c axis. Dashed lines indicate hydrogen bonds. H atoms not involved in hydrogen bonds have been omitted for clarity. | |
Fig. 3. Crystal packing, showing the π–π and C—H···π stacking interactions. The yellow dots are the centroids of benzene and imidazole rings. H atoms not involved in C—H···π interactions have been omitted for clarity. |
C10H12N2OS | Z = 4 |
Mr = 208.28 | F(000) = 440 |
Triclinic, P1 | Dx = 1.356 Mg m−3 |
Hall symbol: -P 1 | Melting point: 409 K |
a = 9.3235 (2) Å | Mo Kα radiation, λ = 0.71073 Å |
b = 9.7659 (2) Å | Cell parameters from 13769 reflections |
c = 11.4588 (3) Å | θ = 2–29° |
α = 78.0849 (9)° | µ = 0.29 mm−1 |
β = 88.9066 (8)° | T = 223 K |
γ = 88.1399 (9)° | Prism, brown |
V = 1020.25 (4) Å3 | 0.20 × 0.20 × 0.15 mm |
Nonius KappaCCD diffractometer | 3996 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.036 |
Graphite monochromator | θmax = 29.1°, θmin = 1.8° |
φ and ω scans | h = −12→12 |
13769 measured reflections | k = −12→12 |
5257 independent 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)] = 0.041 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.102 | H atoms treated by a mixture of independent and constrained refinement |
S = 0.96 | Method = Modified Sheldrick w = 1/[σ2(F2) + (0.04P)2 + 0.62P], where P = [max(Fo2,0) + 2Fc2]/3 |
5242 reflections | (Δ/σ)max = 0.001 |
261 parameters | Δρmax = 0.51 e Å−3 |
0 restraints | Δρmin = −0.32 e Å−3 |
88 constraints |
C10H12N2OS | γ = 88.1399 (9)° |
Mr = 208.28 | V = 1020.25 (4) Å3 |
Triclinic, P1 | Z = 4 |
a = 9.3235 (2) Å | Mo Kα radiation |
b = 9.7659 (2) Å | µ = 0.29 mm−1 |
c = 11.4588 (3) Å | T = 223 K |
α = 78.0849 (9)° | 0.20 × 0.20 × 0.15 mm |
β = 88.9066 (8)° |
Nonius KappaCCD diffractometer | 3996 reflections with I > 2σ(I) |
13769 measured reflections | Rint = 0.036 |
5257 independent reflections |
R[F2 > 2σ(F2)] = 0.041 | 0 restraints |
wR(F2) = 0.102 | H atoms treated by a mixture of independent and constrained refinement |
S = 0.96 | Δρmax = 0.51 e Å−3 |
5242 reflections | Δρmin = −0.32 e Å−3 |
261 parameters |
Experimental. 1H NMR (DMSO-d6, 300 MHz, p.p.m.) δ: 2.71 (s, 3H, CH3); 3.68–3.74 (m 2H, CH2O, JCH2—CH2 = 5.7 Hz and JCH2—OH = 5.4 Hz); 4.17 (t, 2H, CH2N, JCH2—CH2 = 5.7 Hz); 5.00 (t, 1H, OH, JCH2—OH = 5.4 Hz); 7.13–7.17 and 7.46–7.55 (m, 4H, C6H4). 13C NMR (DMSO-d6, 300 MHz, p.p.m.) δ: 14.35 (CH3); 46.25 (CH2N); 59.14 (CH2O); 109.75, 117.31, 121.14, 121.21, 136.75, 142.92 (C6H5); 152.48 (C═N). |
Refinement. The 15 reflections 1 0 0; -1 1 0; 0 1 0; 1 1 0; -1 - 1 1; 0 - 1 1; 1 - 1 1; -1 0 1; 0 0 1; 1 0 1; -1 1 1; 0 1 1; 1 1 1; 0 0 2; 0 1 2 have been measured with too low intensities. It might be caused by some systematical error, probably by shielding by a beam stop of these diffractions. They were not used in the refinement. |
x | y | z | Uiso*/Ueq | ||
S1A | 0.49131 (5) | 0.82212 (5) | 0.49825 (4) | 0.0390 | |
C3A | 0.42886 (16) | 0.69994 (15) | 0.42198 (14) | 0.0286 | |
N1A | 0.28691 (13) | 0.66663 (13) | 0.43140 (12) | 0.0286 | |
C5A | 0.26838 (17) | 0.57367 (15) | 0.35708 (15) | 0.0298 | |
C6A | 0.40349 (17) | 0.55494 (15) | 0.30706 (15) | 0.0309 | |
N2A | 0.50366 (14) | 0.63619 (13) | 0.34868 (12) | 0.0309 | |
C7A | 0.4221 (2) | 0.46382 (18) | 0.22858 (18) | 0.0430 | |
C8A | 0.3031 (2) | 0.39422 (19) | 0.20412 (19) | 0.0507 | |
C9A | 0.1686 (2) | 0.41504 (19) | 0.25355 (19) | 0.0481 | |
C10A | 0.14723 (19) | 0.50586 (17) | 0.33090 (17) | 0.0386 | |
C2A | 0.17826 (17) | 0.70834 (17) | 0.51181 (15) | 0.0336 | |
C1A | 0.07853 (17) | 0.82574 (17) | 0.45194 (16) | 0.0354 | |
O1A | 0.15279 (14) | 0.95034 (13) | 0.41601 (12) | 0.0405 | |
C4A | 0.67938 (19) | 0.8087 (2) | 0.4688 (2) | 0.0463 | |
S1B | 0.34070 (5) | 1.07040 (5) | 0.04701 (4) | 0.0402 | |
C3B | 0.16057 (17) | 1.10450 (15) | 0.07442 (14) | 0.0299 | |
N2B | 0.09036 (15) | 1.06622 (14) | 0.17658 (12) | 0.0325 | |
C6B | −0.04765 (17) | 1.12427 (16) | 0.15371 (14) | 0.0307 | |
C5B | −0.05673 (17) | 1.19801 (16) | 0.03565 (14) | 0.0306 | |
N1B | 0.07856 (14) | 1.18307 (13) | −0.01412 (12) | 0.0313 | |
C2B | 0.12112 (19) | 1.23474 (17) | −0.13814 (14) | 0.0357 | |
C1B | 0.1892 (2) | 1.37598 (19) | −0.15947 (16) | 0.0419 | |
O1B | 0.21179 (14) | 1.42576 (15) | −0.28301 (12) | 0.0521 | |
C10B | −0.18151 (19) | 1.26805 (18) | −0.01093 (16) | 0.0395 | |
C9B | −0.2986 (2) | 1.2612 (2) | 0.06571 (18) | 0.0458 | |
C8B | −0.2918 (2) | 1.1879 (2) | 0.18335 (18) | 0.0449 | |
C7B | −0.16712 (19) | 1.11853 (18) | 0.22973 (16) | 0.0381 | |
C4B | 0.3871 (2) | 0.9554 (2) | 0.18458 (19) | 0.0578 | |
H1B | 0.305 (3) | 1.398 (3) | −0.306 (3) | 0.091 (9)* | |
H1A | 0.136 (3) | 0.992 (3) | 0.329 (3) | 0.094 (9)* | |
H10A | 0.0555 | 0.5211 | 0.3642 | 0.0468* | |
H9A | 0.0895 | 0.3657 | 0.2337 | 0.0576* | |
H8A | 0.3134 | 0.3303 | 0.1520 | 0.0612* | |
H7A | 0.5130 | 0.4501 | 0.1934 | 0.0516* | |
H10B | −0.1862 | 1.3181 | −0.0913 | 0.0468* | |
H9B | −0.3860 | 1.3078 | 0.0373 | 0.0552* | |
H8B | −0.3748 | 1.1855 | 0.2331 | 0.0540* | |
H7B | −0.1630 | 1.0688 | 0.3102 | 0.0456* | |
H41A | 0.7284 | 0.8715 | 0.5062 | 0.0552* | |
H42A | 0.6966 | 0.8319 | 0.3851 | 0.0552* | |
H43A | 0.7132 | 0.7157 | 0.4993 | 0.0552* | |
H41B | 0.4855 | 0.9276 | 0.1822 | 0.0696* | |
H42B | 0.3707 | 1.0025 | 0.2486 | 0.0681* | |
H43B | 0.3296 | 0.8751 | 0.1961 | 0.0681* | |
H11A | 0.0039 | 0.8396 | 0.5063 | 0.0420* | |
H12A | 0.0383 | 0.8011 | 0.3838 | 0.0420* | |
H21A | 0.2257 | 0.7382 | 0.5744 | 0.0408* | |
H22A | 0.1226 | 0.6293 | 0.5442 | 0.0408* | |
H21B | 0.0383 | 1.2421 | −0.1863 | 0.0432* | |
H22B | 0.1881 | 1.1693 | −0.1609 | 0.0432* | |
H11B | 0.1277 | 1.4401 | −0.1289 | 0.0504* | |
H12B | 0.2787 | 1.3675 | −0.1200 | 0.0504* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1A | 0.0358 (2) | 0.0417 (2) | 0.0440 (3) | −0.00593 (17) | −0.00121 (18) | −0.01874 (19) |
C3A | 0.0264 (7) | 0.0263 (7) | 0.0320 (8) | −0.0010 (5) | −0.0012 (6) | −0.0030 (6) |
N1A | 0.0250 (6) | 0.0282 (6) | 0.0324 (7) | −0.0025 (5) | 0.0027 (5) | −0.0059 (5) |
C5A | 0.0301 (8) | 0.0237 (7) | 0.0345 (8) | −0.0019 (6) | −0.0017 (6) | −0.0030 (6) |
C6A | 0.0304 (8) | 0.0254 (7) | 0.0370 (9) | 0.0010 (6) | −0.0024 (6) | −0.0067 (6) |
N2A | 0.0258 (6) | 0.0304 (7) | 0.0371 (7) | 0.0003 (5) | 0.0009 (5) | −0.0085 (5) |
C7A | 0.0469 (10) | 0.0357 (9) | 0.0496 (11) | 0.0062 (7) | −0.0007 (8) | −0.0174 (8) |
C8A | 0.0676 (14) | 0.0342 (9) | 0.0557 (12) | 0.0016 (9) | −0.0119 (10) | −0.0213 (8) |
C9A | 0.0518 (11) | 0.0344 (9) | 0.0596 (12) | −0.0108 (8) | −0.0156 (10) | −0.0107 (8) |
C10A | 0.0331 (8) | 0.0319 (8) | 0.0487 (10) | −0.0086 (6) | −0.0055 (7) | −0.0017 (7) |
C2A | 0.0312 (8) | 0.0368 (8) | 0.0311 (8) | −0.0020 (6) | 0.0077 (7) | −0.0034 (6) |
C1A | 0.0288 (8) | 0.0419 (9) | 0.0362 (9) | 0.0013 (6) | 0.0049 (7) | −0.0107 (7) |
O1A | 0.0449 (7) | 0.0375 (6) | 0.0389 (7) | −0.0012 (5) | −0.0030 (6) | −0.0068 (5) |
C4A | 0.0330 (9) | 0.0471 (10) | 0.0608 (13) | −0.0082 (7) | −0.0080 (8) | −0.0140 (9) |
S1B | 0.0384 (2) | 0.0427 (2) | 0.0365 (2) | 0.00559 (17) | 0.00863 (18) | −0.00300 (17) |
C3B | 0.0355 (8) | 0.0259 (7) | 0.0286 (8) | −0.0031 (6) | 0.0039 (6) | −0.0065 (6) |
N2B | 0.0381 (7) | 0.0304 (7) | 0.0284 (7) | −0.0011 (5) | 0.0044 (6) | −0.0051 (5) |
C6B | 0.0365 (8) | 0.0270 (7) | 0.0296 (8) | −0.0048 (6) | 0.0043 (6) | −0.0079 (6) |
C5B | 0.0341 (8) | 0.0292 (7) | 0.0292 (8) | −0.0060 (6) | 0.0040 (6) | −0.0072 (6) |
N1B | 0.0349 (7) | 0.0315 (7) | 0.0263 (7) | −0.0031 (5) | 0.0037 (5) | −0.0036 (5) |
C2B | 0.0414 (9) | 0.0400 (9) | 0.0245 (8) | −0.0014 (7) | 0.0047 (7) | −0.0041 (6) |
C1B | 0.0409 (10) | 0.0404 (9) | 0.0397 (10) | −0.0038 (7) | 0.0071 (8) | 0.0021 (7) |
O1B | 0.0349 (7) | 0.0628 (9) | 0.0443 (8) | 0.0089 (6) | 0.0116 (6) | 0.0195 (6) |
C10B | 0.0398 (9) | 0.0407 (9) | 0.0367 (9) | −0.0002 (7) | −0.0023 (7) | −0.0052 (7) |
C9B | 0.0358 (9) | 0.0508 (11) | 0.0519 (12) | 0.0036 (8) | 0.0000 (8) | −0.0137 (9) |
C8B | 0.0390 (10) | 0.0491 (10) | 0.0491 (11) | −0.0024 (8) | 0.0116 (8) | −0.0170 (8) |
C7B | 0.0433 (10) | 0.0378 (9) | 0.0336 (9) | −0.0055 (7) | 0.0104 (7) | −0.0088 (7) |
C4B | 0.0442 (11) | 0.0745 (14) | 0.0448 (12) | 0.0157 (10) | 0.0037 (9) | 0.0072 (10) |
S1A—C3A | 1.7383 (16) | S1B—C3B | 1.7369 (16) |
S1A—C4A | 1.7851 (19) | S1B—C4B | 1.788 (2) |
C3A—N1A | 1.3700 (19) | C3B—N2B | 1.321 (2) |
C3A—N2A | 1.321 (2) | C3B—N1B | 1.368 (2) |
N1A—C5A | 1.384 (2) | N2B—C6B | 1.396 (2) |
N1A—C2A | 1.461 (2) | C6B—C5B | 1.398 (2) |
C5A—C6A | 1.396 (2) | C6B—C7B | 1.396 (2) |
C5A—C10A | 1.396 (2) | C5B—N1B | 1.390 (2) |
C6A—N2A | 1.397 (2) | C5B—C10B | 1.388 (2) |
C6A—C7A | 1.395 (2) | N1B—C2B | 1.458 (2) |
C7A—C8A | 1.382 (3) | C2B—C1B | 1.509 (2) |
C7A—H7A | 0.950 | C2B—H21B | 0.950 |
C8A—C9A | 1.392 (3) | C2B—H22B | 0.950 |
C8A—H8A | 0.950 | C1B—O1B | 1.413 (2) |
C9A—C10A | 1.385 (3) | C1B—H11B | 0.950 |
C9A—H9A | 0.950 | C1B—H12B | 0.950 |
C10A—H10A | 0.950 | O1B—H1B | 0.95 (3) |
C2A—C1A | 1.510 (2) | C10B—C9B | 1.382 (3) |
C2A—H21A | 0.950 | C10B—H10B | 0.950 |
C2A—H22A | 0.950 | C9B—C8B | 1.391 (3) |
C1A—O1A | 1.402 (2) | C9B—H9B | 0.950 |
C1A—H11A | 0.950 | C8B—C7B | 1.385 (3) |
C1A—H12A | 0.950 | C8B—H8B | 0.950 |
O1A—H1A | 1.01 (3) | C7B—H7B | 0.950 |
C4A—H41A | 0.950 | C4B—H41B | 0.950 |
C4A—H42A | 0.950 | C4B—H42B | 0.950 |
C4A—H43A | 0.950 | C4B—H43B | 0.950 |
C3A—S1A—C4A | 100.28 (8) | C3B—S1B—C4B | 100.22 (9) |
S1A—C3A—N1A | 119.56 (12) | S1B—C3B—N2B | 126.69 (13) |
S1A—C3A—N2A | 126.71 (12) | S1B—C3B—N1B | 119.73 (12) |
N1A—C3A—N2A | 113.67 (14) | N2B—C3B—N1B | 113.53 (14) |
C3A—N1A—C5A | 106.27 (13) | C3B—N2B—C6B | 104.41 (13) |
C3A—N1A—C2A | 127.66 (14) | N2B—C6B—C5B | 110.28 (14) |
C5A—N1A—C2A | 125.82 (13) | N2B—C6B—C7B | 129.65 (15) |
N1A—C5A—C6A | 105.66 (13) | C5B—C6B—C7B | 120.07 (16) |
N1A—C5A—C10A | 131.55 (15) | C6B—C5B—N1B | 105.33 (14) |
C6A—C5A—C10A | 122.79 (15) | C6B—C5B—C10B | 122.56 (15) |
C5A—C6A—N2A | 110.23 (13) | N1B—C5B—C10B | 132.10 (15) |
C5A—C6A—C7A | 120.05 (15) | C5B—N1B—C3B | 106.45 (13) |
N2A—C6A—C7A | 129.72 (15) | C5B—N1B—C2B | 126.32 (14) |
C6A—N2A—C3A | 104.17 (13) | C3B—N1B—C2B | 127.15 (14) |
C6A—C7A—C8A | 117.44 (17) | N1B—C2B—C1B | 113.41 (14) |
C6A—C7A—H7A | 120.6 | N1B—C2B—H21B | 108.5 |
C8A—C7A—H7A | 122.0 | C1B—C2B—H21B | 108.4 |
C7A—C8A—C9A | 121.94 (17) | N1B—C2B—H22B | 108.5 |
C7A—C8A—H8A | 119.0 | C1B—C2B—H22B | 108.5 |
C9A—C8A—H8A | 119.0 | H21B—C2B—H22B | 109.5 |
C8A—C9A—C10A | 121.66 (17) | C2B—C1B—O1B | 109.85 (15) |
C8A—C9A—H9A | 119.2 | C2B—C1B—H11B | 109.4 |
C10A—C9A—H9A | 119.2 | O1B—C1B—H11B | 109.5 |
C5A—C10A—C9A | 116.10 (17) | C2B—C1B—H12B | 109.4 |
C5A—C10A—H10A | 122.0 | O1B—C1B—H12B | 109.3 |
C9A—C10A—H10A | 121.9 | H11B—C1B—H12B | 109.5 |
N1A—C2A—C1A | 113.63 (13) | C1B—O1B—H1B | 110.3 (18) |
N1A—C2A—H21A | 108.4 | C5B—C10B—C9B | 116.51 (17) |
C1A—C2A—H21A | 108.3 | C5B—C10B—H10B | 121.8 |
N1A—C2A—H22A | 108.5 | C9B—C10B—H10B | 121.7 |
C1A—C2A—H22A | 108.5 | C10B—C9B—C8B | 121.79 (18) |
H21A—C2A—H22A | 109.5 | C10B—C9B—H9B | 119.1 |
C2A—C1A—O1A | 110.78 (13) | C8B—C9B—H9B | 119.1 |
C2A—C1A—H11A | 109.2 | C9B—C8B—C7B | 121.60 (17) |
O1A—C1A—H11A | 109.2 | C9B—C8B—H8B | 119.2 |
C2A—C1A—H12A | 109.1 | C7B—C8B—H8B | 119.2 |
O1A—C1A—H12A | 109.0 | C6B—C7B—C8B | 117.47 (17) |
H11A—C1A—H12A | 109.5 | C6B—C7B—H7B | 121.3 |
C1A—O1A—H1A | 110.8 (16) | C8B—C7B—H7B | 121.3 |
S1A—C4A—H41A | 109.5 | S1B—C4B—H41B | 109.5 |
S1A—C4A—H42A | 109.5 | S1B—C4B—H42B | 109.5 |
H41A—C4A—H42A | 109.5 | H41B—C4B—H42B | 109.5 |
S1A—C4A—H43A | 109.5 | S1B—C4B—H43B | 109.4 |
H41A—C4A—H43A | 109.5 | H41B—C4B—H43B | 109.5 |
H42A—C4A—H43A | 109.5 | H42B—C4B—H43B | 109.5 |
Cg1 and Cg2 are the centroids of the N1A-C3A-N2A-C6A-C5A and C5A—C10A rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1B—H1B···N2Ai | 0.95 (3) | 1.88 (3) | 2.825 (3) | 174 (3) |
O1A—H1A···N2B | 1.01 (3) | 1.80 (3) | 2.808 (3) | 175 (3) |
C4A—H41A···O1Aii | 0.95 | 2.42 | 3.366 (3) | 174 |
C4A—H43A···Cg2iii | 0.95 | 2.86 | 3.627 (2) | 139 |
C4B—H43B···Cg1 | 0.95 | 2.86 | 3.486 (2) | 125 |
C10B—H10B···Cg2iv | 0.95 | 2.74 | 3.631 (2) | 157 |
Symmetry codes: (i) −x+1, −y+2, −z; (ii) −x+1, −y+2, −z+1; (iii) −x+1, −y+1, −z+1; (iv) −x, −y+2, −z. |
Experimental details
Crystal data | |
Chemical formula | C10H12N2OS |
Mr | 208.28 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 223 |
a, b, c (Å) | 9.3235 (2), 9.7659 (2), 11.4588 (3) |
α, β, γ (°) | 78.0849 (9), 88.9066 (8), 88.1399 (9) |
V (Å3) | 1020.25 (4) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.29 |
Crystal size (mm) | 0.20 × 0.20 × 0.15 |
Data collection | |
Diffractometer | Nonius KappaCCD |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 13769, 5257, 3996 |
Rint | 0.036 |
(sin θ/λ)max (Å−1) | 0.685 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.041, 0.102, 0.96 |
No. of reflections | 5242 |
No. of parameters | 261 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.51, −0.32 |
Computer programs: COLLECT (Nonius, 2001), DENZO/SCALEPACK (Otwinowski & Minor, 1997), SIR92 (Altomare et al., 1994), CRYSTALS (Betteridge et al., 2003), ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2009).
Cg1 and Cg2 are the centroids of the N1A-C3A-N2A-C6A-C5A and C5A—C10A rings, respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1B—H1B···N2Ai | 0.95 (3) | 1.88 (3) | 2.825 (3) | 174 (3) |
O1A—H1A···N2B | 1.01 (3) | 1.80 (3) | 2.808 (3) | 175 (3) |
C4A—H41A···O1Aii | 0.95 | 2.42 | 3.366 (3) | 174 |
C4A—H43A···Cg2iii | 0.95 | 2.86 | 3.627 (2) | 139 |
C4B—H43B···Cg1 | 0.95 | 2.86 | 3.486 (2) | 125 |
C10B—H10B···Cg2iv | 0.95 | 2.74 | 3.631 (2) | 157 |
Symmetry codes: (i) −x+1, −y+2, −z; (ii) −x+1, −y+2, −z+1; (iii) −x+1, −y+1, −z+1; (iv) −x, −y+2, −z. |
Acknowledgements
We thank the Laboratoire de Physique des Interactions Ioniques et Spectropôle, Université de Provence, et Université Paul Cézanne, Faculté des Sciences et Techniques de Saint Jérôme, Marseilles, France, for the use of their diffractometer.
References
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Numerous compounds having benzimidazole ring systems possess versatile pharmacological activities such as antiviral, anthelmintic, spasmolytic, antihypertensive and vasodilator (Akkurt et al., 2006). It has also been reported that many benzimidazole derivatives have antimicrobial and antifungal activities (Küçükbay et al., 2003, 2004, Puratchikody et al., 2008). Therefore, the synthesis of new benzimidazole derivatives is of considerable interest. In order to explore new benzimidazole properties, the title compound has been synthesized and its crystal structure determined.
The two independent molecules in the asymmetric unit of the title compound and the atomic labeling scheme are shown in Fig.1. In this structure, the nine-membered benzimidazole ring systems (N1A/C3A/N2A/C6A/C7A/C8A/C9A/C10A/C5A, N1B/C3B/N2B/C6B/C7B/C8B/C9B/C10B/C5B) of both independent molecules are essentially planar, the maximum deviation from planarity being, respectively, 0.016 (2) Å for atom C8A and 0.078 (16) Å for atom C3B. These two ring systems make a dihedral angle of 73.95 (6)°.
In the crystal structure, we observe the formation of R44(28) centrosymmetric tetramers (Bernstein et al., 1995) via O—H···N hydrogen bonds. The tetramers are linked by two symmetric C—H···O hydrogen bonds to form a zigzag infinite chain along the c axis. The supramolecular aggregation is completed by the presence of C—H···π interactions (Table 1) and π–π stacking between two parallel imidazole rings. The centroid···centroid distance of those rings, Cg1···Cg1(1 - x,1 - y,1 - z) and Cg4···Cg4(-x,2 - y,-z) are 4.075 (1) Å and 3.719 (1) Å, respectively (Fig.3).