organic compounds
H-1,3-benzimidazol-3-ium bromide monohydrate
of 1,3-bis(4-methylbenzyl)-1aDepartment of Physics, Faculty of Sciences, Erciyes University, 38039 Kayseri, Turkey, bDepartment of Physics, Faculty of Education, Dicle University, 21280, Diyarbakir, Turkey, and, Science and Technology Application and Research Center, Dicle University, 21280, Diyarbakir, Turkey, cDepartment of Chemistry, Faculty of Sciences, Erciyes University, 38039 Kayseri, Turkey, and dDepartment of Chemistry, Faculty of Arts and Sciences, İnönü University, 44280 Malatya, Turkey
*Correspondence e-mail: akkurt@erciyes.edu.tr
In the title hydrated symetrically substituted 1,3-bis(4-methylbenzyl)benzimidazolium salt, C23H23N2+·Br−·H2O, the dihedral angles between the benzimidazole ring system (r.m.s. deviation = 0.003 Å) and the pendant benzene rings are 73.18 (16) and 77.52 (16)°. Both benzene rings lie to the same side of the benzimidazole ring system, giving the cation an overall U-shape. In the crystal, the cation is linked to the water molecule by a short C—H⋯O hydrogen bond and the water molecule forms O—H⋯Br hydrogen bonds. Together, these interactions lead to [010] chains. The packing is consolidated by C—H⋯Br hydrogen bonds and aromatic π–π stacking interactions [centroid–centroid distances = 3.5401 (17) and 3.8815 (18) Å], generating a three-dimensional network.
Keywords: crystal structure; 1,3-bis(4-methylbenzyl)-1H-3,1-benzimidazol-3-ium bromide monohydrate; benzimidazolium salts; N-heterocyclic carbenes; hydrogen bonds; aromatic π–π stacking interactions.
CCDC reference: 1036037
1. Related literature
For general background to N-heterocyclic et al. (1991); Akkoç & Gök (2013); Akkoç et al. (2014); Berding et al. (2009); Gök et al. (2014). For related structures, see: Akkurt et al. (2011, 2012).
(NHCs), which have been frequently used as ligands in organometallic and coordination chemistry, see: Arduengo2. Experimental
2.1. Crystal data
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2.2. Data collection
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2.3. Refinement
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Data collection: APEX2 (Bruker, 2007); cell SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS2014 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: PLATON (Spek, 2009).
Supporting information
CCDC reference: 1036037
https://doi.org/10.1107/S2056989014025857/hb7325sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989014025857/hb7325Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S2056989014025857/hb7325Isup3.cml
To a solution of benzimidazole and potassium hidroxide in ethyl alcohol, 4-methylbenzyl bromide was added slowly. This mixture was refluxed at 18 h. Then, it was filtered and was dried under vacuum. 4-Methylbenzyl bromide (1.0 mmol) was added slowly to a solution of the obtained N-4-methylbenzylbenzimidazole (1.0 mmol) in DMF (4 ml) at room temperature and the resulting mixture was heated up to 353 K for 12 h. Diethyl ether (15 ml) was added to obtain a crystalline solid which was filtered off. The solid was washed with diethyl ether (2x15 ml) and dried under vacuum. The crude product was recrystallized from ethyl alcohol/diethyl ether at room temperature to yield colourless blocks.
The H atoms H1W and H2W of the water molecule were located in a difference Fourier map. Their positions were refined with O—H = 0.82 (2) Å, but their temperature factors were refined isotropically with Uiso(H) = 1.5Ueq(O). H atoms attached to C atoms were placed in calculated positions with C—H = 0.93 - 0.97 Å, and refined using a riding model with Uiso(H) = 1.2 or 1.5Ueq(C). The highest peak and the deepest hole in the final difference Fourier map are located 0.97 Å from Br1 and 0.81 Å from Br1, respectively.
N-heterocyclic
(NHCs), on which many studies have been conducted over the past 40 years, have been frequently used as ligands in organometallic and coordination chemistry (Arduengo et al., 1991; Akkoç & Gök, 2013; Akkoç et al. 2014; Berding et al., 2009; Gök et al., 2014). These ligands have such properties as being strong-donors, weak-acceptors, of low toxicity, easily-synthesized and able to control the steric and electronic effects of substituents on the nitrogen atom, and being more stable against air and moisture compared to phosphine types.In the title compound (Fig. 1), the benzene rings (C9–C14 and C17–C22) which form a dihedral angle of 75.4 (2)° make dihedral angles of 73.18 (16) and 77.52 (16)° with respect to the central benzimidazole ring system (N1/N2/C1–C7). All bond lengths and bond angles in Table 1 are in normal range, and they are in a good agreement with those found in related compounds (Akkurt et al., 2011; Akkurt et al., 2012).
The crystal packing features C—H···O, O—H···Br and C—H···Br hydrogen bonds (Table 2, Fig. 2) together with π-π stacking interactions between the benzene and imidazolium rings (Cg1: C1–C6 and Cg2: N1/N2/C1/C6/C7) [Cg1···Cg2 (1 - x, -y, 1 - z) = 3.5401 (17) Å] and between the benzene rings of the benzimidazole ring system [Cg2···Cg2 (1 - x, -y, 1 - z) = 3.8815 (18) Å].
For general background to N-heterocyclic
(NHCs), which have been frequently used as ligands in organometallic and coordination chemistry, see: Arduengo et al. (1991); Akkoç & Gök (2013); Akkoç et al. (2014); Berding et al. (2009); Gök et al. (2014). For related structures, see: Akkurt et al. (2011, 2012).Data collection: APEX2 (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXS2014 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: PLATON (Spek, 2009).Fig. 1. Perspective view of the molecular structure of the title compound with displacement ellipsoids drawn at the 30% probability level. | |
Fig. 2. View of the hydrogen bonding and molecular packing of the title compound along a axis. Only H atoms involved in H bonding are shown. |
C23H23N2+·Br−·H2O | Z = 2 |
Mr = 425.35 | F(000) = 440 |
Triclinic, P1 | Dx = 1.329 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 9.3846 (3) Å | Cell parameters from 7459 reflections |
b = 9.7174 (3) Å | θ = 2.3–27.0° |
c = 12.5603 (4) Å | µ = 1.95 mm−1 |
α = 76.405 (2)° | T = 296 K |
β = 84.739 (2)° | Plane, colourless |
γ = 72.696 (2)° | 0.15 × 0.10 × 0.06 mm |
V = 1062.65 (6) Å3 |
Bruker APEXII CCD diffractometer | 3144 reflections with I > 2σ(I) |
Radiation source: sealed tube | Rint = 0.035 |
Graphite monochromator | θmax = 26.4°, θmin = 1.7° |
φ and ω scans | h = −11→11 |
22302 measured reflections | k = −12→12 |
4342 independent reflections | l = −15→15 |
Refinement on F2 | 2 restraints |
Least-squares matrix: full | H atoms treated by a mixture of independent and constrained refinement |
R[F2 > 2σ(F2)] = 0.048 | w = 1/[σ2(Fo2) + (0.0735P)2 + 0.2354P] where P = (Fo2 + 2Fc2)/3 |
wR(F2) = 0.135 | (Δ/σ)max < 0.001 |
S = 1.06 | Δρmax = 1.15 e Å−3 |
4342 reflections | Δρmin = −0.49 e Å−3 |
252 parameters |
C23H23N2+·Br−·H2O | γ = 72.696 (2)° |
Mr = 425.35 | V = 1062.65 (6) Å3 |
Triclinic, P1 | Z = 2 |
a = 9.3846 (3) Å | Mo Kα radiation |
b = 9.7174 (3) Å | µ = 1.95 mm−1 |
c = 12.5603 (4) Å | T = 296 K |
α = 76.405 (2)° | 0.15 × 0.10 × 0.06 mm |
β = 84.739 (2)° |
Bruker APEXII CCD diffractometer | 3144 reflections with I > 2σ(I) |
22302 measured reflections | Rint = 0.035 |
4342 independent reflections |
R[F2 > 2σ(F2)] = 0.048 | 2 restraints |
wR(F2) = 0.135 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.06 | Δρmax = 1.15 e Å−3 |
4342 reflections | Δρmin = −0.49 e Å−3 |
252 parameters |
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 | ||
Br1 | 0.15363 (4) | 0.70096 (4) | 0.47065 (3) | 0.0746 (2) | |
N1 | 0.2897 (3) | 0.1364 (3) | 0.36229 (18) | 0.0512 (8) | |
N2 | 0.4267 (3) | 0.2795 (2) | 0.37164 (18) | 0.0501 (8) | |
C1 | 0.5241 (3) | 0.1441 (3) | 0.3623 (2) | 0.0474 (8) | |
C2 | 0.6799 (4) | 0.0955 (4) | 0.3603 (3) | 0.0597 (11) | |
C3 | 0.7420 (4) | −0.0495 (4) | 0.3526 (3) | 0.0730 (12) | |
C4 | 0.6544 (4) | −0.1407 (4) | 0.3469 (3) | 0.0714 (13) | |
C5 | 0.5022 (4) | −0.0930 (3) | 0.3487 (2) | 0.0601 (10) | |
C6 | 0.4383 (3) | 0.0537 (3) | 0.3562 (2) | 0.0484 (9) | |
C7 | 0.2888 (3) | 0.2699 (3) | 0.3712 (2) | 0.0532 (9) | |
C8 | 0.4673 (4) | 0.4144 (3) | 0.3749 (3) | 0.0599 (11) | |
C9 | 0.4849 (3) | 0.5039 (3) | 0.2621 (3) | 0.0543 (10) | |
C10 | 0.3662 (4) | 0.5668 (4) | 0.1937 (3) | 0.0768 (14) | |
C11 | 0.3829 (5) | 0.6477 (4) | 0.0897 (3) | 0.0781 (12) | |
C12 | 0.5159 (5) | 0.6716 (4) | 0.0512 (3) | 0.0731 (14) | |
C13 | 0.6324 (5) | 0.6105 (6) | 0.1209 (4) | 0.0969 (17) | |
C14 | 0.6195 (4) | 0.5281 (5) | 0.2240 (4) | 0.0828 (16) | |
C15 | 0.5316 (6) | 0.7626 (6) | −0.0641 (4) | 0.1146 (19) | |
C16 | 0.1558 (4) | 0.0910 (4) | 0.3505 (3) | 0.0629 (11) | |
C17 | 0.1196 (3) | 0.1227 (3) | 0.2314 (3) | 0.0552 (10) | |
C18 | 0.1778 (4) | 0.0197 (4) | 0.1693 (3) | 0.0744 (14) | |
C19 | 0.1519 (5) | 0.0524 (5) | 0.0591 (3) | 0.0863 (17) | |
C20 | 0.0658 (4) | 0.1912 (5) | 0.0063 (3) | 0.0724 (14) | |
C21 | 0.0054 (5) | 0.2899 (4) | 0.0696 (3) | 0.0795 (16) | |
C22 | 0.0303 (4) | 0.2586 (4) | 0.1806 (3) | 0.0724 (12) | |
C23 | 0.0438 (6) | 0.2267 (7) | −0.1146 (3) | 0.110 (2) | |
O1 | −0.0190 (4) | 0.5308 (3) | 0.3474 (2) | 0.0850 (11) | |
H2 | 0.73790 | 0.15690 | 0.36400 | 0.0720* | |
H3 | 0.84540 | −0.08750 | 0.35110 | 0.0880* | |
H4 | 0.70140 | −0.23780 | 0.34160 | 0.0850* | |
H5 | 0.44440 | −0.15460 | 0.34530 | 0.0720* | |
H7 | 0.20290 | 0.34660 | 0.37630 | 0.0640* | |
H8A | 0.56020 | 0.38660 | 0.41330 | 0.0720* | |
H8B | 0.39050 | 0.47440 | 0.41540 | 0.0720* | |
H10 | 0.27300 | 0.55480 | 0.21780 | 0.0920* | |
H11 | 0.30080 | 0.68710 | 0.04450 | 0.0940* | |
H13 | 0.72460 | 0.62560 | 0.09750 | 0.1160* | |
H14 | 0.70230 | 0.48810 | 0.26850 | 0.0990* | |
H15A | 0.49850 | 0.86580 | −0.06310 | 0.1710* | |
H15B | 0.47190 | 0.74250 | −0.11340 | 0.1710* | |
H15C | 0.63430 | 0.73670 | −0.08800 | 0.1710* | |
H16A | 0.07180 | 0.14440 | 0.38980 | 0.0760* | |
H16B | 0.17390 | −0.01380 | 0.38180 | 0.0760* | |
H18 | 0.23590 | −0.07390 | 0.20220 | 0.0890* | |
H19 | 0.19270 | −0.01960 | 0.01880 | 0.1030* | |
H21 | −0.05540 | 0.38250 | 0.03730 | 0.0950* | |
H22 | −0.01330 | 0.32970 | 0.22130 | 0.0870* | |
H23A | −0.02220 | 0.17570 | −0.13060 | 0.1660* | |
H23B | 0.13840 | 0.19600 | −0.15140 | 0.1660* | |
H23C | 0.00120 | 0.33120 | −0.13950 | 0.1660* | |
H1W | −0.069 (5) | 0.490 (6) | 0.395 (4) | 0.1280* | |
H2W | 0.017 (6) | 0.582 (5) | 0.374 (4) | 0.1280* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Br1 | 0.0632 (3) | 0.0626 (2) | 0.1010 (3) | −0.0181 (2) | 0.0024 (2) | −0.0249 (2) |
N1 | 0.0516 (14) | 0.0507 (14) | 0.0456 (13) | −0.0114 (11) | 0.0027 (10) | −0.0053 (11) |
N2 | 0.0516 (14) | 0.0446 (13) | 0.0468 (13) | −0.0021 (11) | −0.0055 (10) | −0.0095 (10) |
C1 | 0.0533 (16) | 0.0431 (14) | 0.0398 (14) | −0.0032 (13) | −0.0048 (12) | −0.0097 (12) |
C2 | 0.0523 (18) | 0.0612 (19) | 0.0595 (18) | −0.0036 (15) | −0.0088 (14) | −0.0147 (15) |
C3 | 0.057 (2) | 0.075 (2) | 0.072 (2) | 0.0122 (18) | −0.0080 (16) | −0.0248 (18) |
C4 | 0.082 (3) | 0.0510 (18) | 0.067 (2) | 0.0066 (18) | −0.0042 (18) | −0.0176 (16) |
C5 | 0.076 (2) | 0.0452 (16) | 0.0528 (18) | −0.0091 (15) | −0.0026 (15) | −0.0087 (13) |
C6 | 0.0527 (16) | 0.0470 (15) | 0.0345 (14) | −0.0045 (13) | 0.0010 (12) | −0.0009 (12) |
C7 | 0.0515 (17) | 0.0480 (16) | 0.0491 (16) | −0.0014 (13) | 0.0014 (13) | −0.0071 (13) |
C8 | 0.0619 (19) | 0.0480 (16) | 0.069 (2) | −0.0058 (14) | −0.0113 (15) | −0.0205 (15) |
C9 | 0.0537 (17) | 0.0420 (15) | 0.069 (2) | −0.0103 (13) | −0.0042 (14) | −0.0187 (14) |
C10 | 0.0524 (19) | 0.074 (2) | 0.089 (3) | −0.0164 (17) | −0.0051 (17) | 0.010 (2) |
C11 | 0.073 (2) | 0.074 (2) | 0.079 (2) | −0.0242 (19) | −0.0078 (19) | 0.006 (2) |
C12 | 0.079 (3) | 0.058 (2) | 0.083 (2) | −0.0247 (18) | 0.017 (2) | −0.0174 (18) |
C13 | 0.072 (3) | 0.115 (3) | 0.111 (3) | −0.051 (3) | 0.018 (2) | −0.015 (3) |
C14 | 0.057 (2) | 0.092 (3) | 0.103 (3) | −0.027 (2) | −0.012 (2) | −0.017 (2) |
C15 | 0.140 (4) | 0.101 (3) | 0.096 (3) | −0.049 (3) | 0.037 (3) | −0.005 (3) |
C16 | 0.0608 (19) | 0.066 (2) | 0.060 (2) | −0.0262 (16) | 0.0099 (15) | −0.0038 (16) |
C17 | 0.0481 (16) | 0.0573 (18) | 0.0625 (19) | −0.0224 (14) | 0.0055 (14) | −0.0104 (15) |
C18 | 0.080 (2) | 0.060 (2) | 0.081 (3) | −0.0076 (18) | −0.0144 (19) | −0.0222 (18) |
C19 | 0.086 (3) | 0.095 (3) | 0.085 (3) | −0.017 (2) | −0.001 (2) | −0.045 (2) |
C20 | 0.068 (2) | 0.092 (3) | 0.065 (2) | −0.039 (2) | −0.0019 (17) | −0.011 (2) |
C21 | 0.084 (3) | 0.067 (2) | 0.081 (3) | −0.020 (2) | −0.017 (2) | 0.000 (2) |
C22 | 0.073 (2) | 0.064 (2) | 0.074 (2) | −0.0070 (18) | −0.0038 (18) | −0.0185 (18) |
C23 | 0.112 (4) | 0.165 (5) | 0.069 (3) | −0.072 (3) | −0.004 (2) | −0.012 (3) |
O1 | 0.102 (2) | 0.0815 (19) | 0.0707 (17) | −0.0267 (15) | −0.0048 (14) | −0.0135 (14) |
N1—C6 | 1.393 (4) | C21—C22 | 1.382 (5) |
N1—C7 | 1.326 (4) | C2—H2 | 0.9300 |
N1—C16 | 1.480 (5) | C3—H3 | 0.9300 |
N2—C1 | 1.385 (4) | C4—H4 | 0.9300 |
N2—C7 | 1.326 (4) | C5—H5 | 0.9300 |
N2—C8 | 1.480 (4) | C7—H7 | 0.9300 |
C1—C2 | 1.396 (5) | C8—H8A | 0.9700 |
C1—C6 | 1.375 (4) | C8—H8B | 0.9700 |
C2—C3 | 1.378 (5) | C10—H10 | 0.9300 |
C3—C4 | 1.393 (5) | C11—H11 | 0.9300 |
C4—C5 | 1.364 (5) | C13—H13 | 0.9300 |
C5—C6 | 1.395 (4) | C14—H14 | 0.9300 |
C8—C9 | 1.501 (5) | C15—H15A | 0.9600 |
C9—C10 | 1.370 (5) | C15—H15B | 0.9600 |
C9—C14 | 1.376 (5) | C15—H15C | 0.9600 |
C10—C11 | 1.379 (5) | C16—H16A | 0.9700 |
C11—C12 | 1.362 (7) | C16—H16B | 0.9700 |
C12—C13 | 1.364 (7) | C18—H18 | 0.9300 |
C12—C15 | 1.529 (6) | C19—H19 | 0.9300 |
C13—C14 | 1.369 (7) | C21—H21 | 0.9300 |
C16—C17 | 1.504 (5) | C22—H22 | 0.9300 |
C17—C18 | 1.368 (5) | C23—H23A | 0.9600 |
C17—C22 | 1.377 (5) | C23—H23B | 0.9600 |
C18—C19 | 1.373 (5) | C23—H23C | 0.9600 |
C19—C20 | 1.393 (6) | O1—H1W | 0.83 (5) |
C20—C21 | 1.351 (6) | O1—H2W | 0.82 (5) |
C20—C23 | 1.496 (5) | ||
C6—N1—C7 | 107.4 (3) | C5—C4—H4 | 119.00 |
C6—N1—C16 | 127.1 (3) | C4—C5—H5 | 122.00 |
C7—N1—C16 | 125.2 (3) | C6—C5—H5 | 122.00 |
C1—N2—C7 | 107.8 (2) | N1—C7—H7 | 125.00 |
C1—N2—C8 | 126.7 (3) | N2—C7—H7 | 125.00 |
C7—N2—C8 | 125.5 (2) | N2—C8—H8A | 109.00 |
N2—C1—C2 | 130.8 (3) | N2—C8—H8B | 109.00 |
N2—C1—C6 | 107.0 (3) | C9—C8—H8A | 109.00 |
C2—C1—C6 | 122.3 (3) | C9—C8—H8B | 109.00 |
C1—C2—C3 | 115.6 (3) | H8A—C8—H8B | 108.00 |
C2—C3—C4 | 121.9 (4) | C9—C10—H10 | 120.00 |
C3—C4—C5 | 122.5 (3) | C11—C10—H10 | 120.00 |
C4—C5—C6 | 116.1 (3) | C10—C11—H11 | 119.00 |
N1—C6—C1 | 106.9 (3) | C12—C11—H11 | 119.00 |
N1—C6—C5 | 131.3 (3) | C12—C13—H13 | 119.00 |
C1—C6—C5 | 121.8 (3) | C14—C13—H13 | 119.00 |
N1—C7—N2 | 110.9 (3) | C9—C14—H14 | 120.00 |
N2—C8—C9 | 112.0 (3) | C13—C14—H14 | 120.00 |
C8—C9—C10 | 121.0 (3) | C12—C15—H15A | 109.00 |
C8—C9—C14 | 121.6 (3) | C12—C15—H15B | 109.00 |
C10—C9—C14 | 117.4 (4) | C12—C15—H15C | 109.00 |
C9—C10—C11 | 120.9 (4) | H15A—C15—H15B | 110.00 |
C10—C11—C12 | 122.0 (4) | H15A—C15—H15C | 109.00 |
C11—C12—C13 | 116.4 (4) | H15B—C15—H15C | 110.00 |
C11—C12—C15 | 121.1 (4) | N1—C16—H16A | 110.00 |
C13—C12—C15 | 122.5 (4) | N1—C16—H16B | 110.00 |
C12—C13—C14 | 122.8 (4) | C17—C16—H16A | 110.00 |
C9—C14—C13 | 120.4 (4) | C17—C16—H16B | 110.00 |
N1—C16—C17 | 110.1 (3) | H16A—C16—H16B | 108.00 |
C16—C17—C18 | 121.3 (3) | C17—C18—H18 | 120.00 |
C16—C17—C22 | 120.8 (3) | C19—C18—H18 | 119.00 |
C18—C17—C22 | 117.9 (3) | C18—C19—H19 | 119.00 |
C17—C18—C19 | 121.0 (4) | C20—C19—H19 | 119.00 |
C18—C19—C20 | 121.5 (4) | C20—C21—H21 | 119.00 |
C19—C20—C21 | 116.7 (3) | C22—C21—H21 | 119.00 |
C19—C20—C23 | 120.7 (4) | C17—C22—H22 | 120.00 |
C21—C20—C23 | 122.7 (4) | C21—C22—H22 | 120.00 |
C20—C21—C22 | 122.5 (4) | C20—C23—H23A | 110.00 |
C17—C22—C21 | 120.4 (3) | C20—C23—H23B | 109.00 |
C1—C2—H2 | 122.00 | C20—C23—H23C | 109.00 |
C3—C2—H2 | 122.00 | H23A—C23—H23B | 109.00 |
C2—C3—H3 | 119.00 | H23A—C23—H23C | 109.00 |
C4—C3—H3 | 119.00 | H23B—C23—H23C | 109.00 |
C3—C4—H4 | 119.00 | H1W—O1—H2W | 109 (5) |
C7—N1—C6—C1 | 0.2 (3) | C4—C5—C6—C1 | −0.5 (4) |
C16—N1—C6—C1 | 174.8 (3) | N2—C8—C9—C14 | −117.1 (4) |
C7—N1—C6—C5 | 178.4 (3) | N2—C8—C9—C10 | 64.0 (4) |
C16—N1—C6—C5 | −7.0 (5) | C8—C9—C14—C13 | −179.8 (4) |
C6—N1—C7—N2 | −0.2 (3) | C8—C9—C10—C11 | −179.3 (3) |
C16—N1—C7—N2 | −174.9 (3) | C14—C9—C10—C11 | 1.7 (5) |
C6—N1—C16—C17 | −85.5 (4) | C10—C9—C14—C13 | −0.9 (6) |
C7—N1—C16—C17 | 88.2 (3) | C9—C10—C11—C12 | −1.5 (6) |
C1—N2—C8—C9 | 86.2 (3) | C10—C11—C12—C15 | −179.6 (4) |
C7—N2—C8—C9 | −89.9 (3) | C10—C11—C12—C13 | 0.3 (6) |
C7—N2—C1—C6 | 0.1 (3) | C11—C12—C13—C14 | 0.6 (7) |
C8—N2—C1—C6 | −176.6 (3) | C15—C12—C13—C14 | −179.6 (5) |
C7—N2—C1—C2 | −179.0 (3) | C12—C13—C14—C9 | −0.3 (8) |
C8—N2—C1—C2 | 4.4 (5) | N1—C16—C17—C18 | 90.4 (4) |
C1—N2—C7—N1 | 0.1 (3) | N1—C16—C17—C22 | −87.5 (4) |
C8—N2—C7—N1 | 176.8 (3) | C16—C17—C18—C19 | −175.9 (4) |
N2—C1—C2—C3 | 178.5 (3) | C22—C17—C18—C19 | 2.1 (6) |
C2—C1—C6—C5 | 0.6 (4) | C16—C17—C22—C21 | 175.9 (4) |
N2—C1—C6—C5 | −178.5 (2) | C18—C17—C22—C21 | −2.1 (5) |
C6—C1—C2—C3 | −0.5 (5) | C17—C18—C19—C20 | 0.1 (7) |
C2—C1—C6—N1 | 179.0 (3) | C18—C19—C20—C21 | −2.1 (7) |
N2—C1—C6—N1 | −0.2 (3) | C18—C19—C20—C23 | 177.6 (4) |
C1—C2—C3—C4 | 0.2 (5) | C19—C20—C21—C22 | 2.0 (7) |
C2—C3—C4—C5 | −0.1 (6) | C23—C20—C21—C22 | −177.6 (4) |
C3—C4—C5—C6 | 0.2 (5) | C20—C21—C22—C17 | 0.0 (7) |
C4—C5—C6—N1 | −178.4 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1W···Br1i | 0.83 (5) | 2.47 (5) | 3.261 (3) | 162 (5) |
O1—H2W···Br1 | 0.82 (5) | 2.51 (5) | 3.318 (3) | 171 (4) |
C7—H7···O1 | 0.93 | 2.30 | 3.210 (4) | 166 |
C8—H8B···Br1 | 0.97 | 2.79 | 3.730 (3) | 163 |
C16—H16A···Br1i | 0.97 | 2.91 | 3.875 (4) | 173 |
C16—H16B···Br1ii | 0.97 | 2.79 | 3.741 (4) | 167 |
Symmetry codes: (i) −x, −y+1, −z+1; (ii) x, y−1, z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1W···Br1i | 0.83 (5) | 2.47 (5) | 3.261 (3) | 162 (5) |
O1—H2W···Br1 | 0.82 (5) | 2.51 (5) | 3.318 (3) | 171 (4) |
C7—H7···O1 | 0.93 | 2.30 | 3.210 (4) | 166 |
C8—H8B···Br1 | 0.97 | 2.79 | 3.730 (3) | 163 |
C16—H16A···Br1i | 0.97 | 2.91 | 3.875 (4) | 173 |
C16—H16B···Br1ii | 0.97 | 2.79 | 3.741 (4) | 167 |
Symmetry codes: (i) −x, −y+1, −z+1; (ii) x, y−1, z. |
Acknowledgements
The authors are indebted to the X-ray laboratory of Dicle University Scientific and Technological Applied and Research Center, Diyarbakir, Turkey, for use of the X-ray diffractometer. This study was supported financially by the Erciyes University Research Fund (FBA-2013–4307).
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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.
N-heterocyclic carbenes (NHCs), on which many studies have been conducted over the past 40 years, have been frequently used as ligands in organometallic and coordination chemistry (Arduengo et al., 1991; Akkoç & Gök, 2013; Akkoç et al. 2014; Berding et al., 2009; Gök et al., 2014). These ligands have such properties as being strong-donors, weak-acceptors, of low toxicity, easily-synthesized and able to control the steric and electronic effects of substituents on the nitrogen atom, and being more stable against air and moisture compared to phosphine types.
In the title compound (Fig. 1), the benzene rings (C9–C14 and C17–C22) which form a dihedral angle of 75.4 (2)° make dihedral angles of 73.18 (16) and 77.52 (16)° with respect to the central benzimidazole ring system (N1/N2/C1–C7). All bond lengths and bond angles in Table 1 are in normal range, and they are in a good agreement with those found in related compounds (Akkurt et al., 2011; Akkurt et al., 2012).
The crystal packing features C—H···O, O—H···Br and C—H···Br hydrogen bonds (Table 2, Fig. 2) together with π-π stacking interactions between the benzene and imidazolium rings (Cg1: C1–C6 and Cg2: N1/N2/C1/C6/C7) [Cg1···Cg2 (1 - x, -y, 1 - z) = 3.5401 (17) Å] and between the benzene rings of the benzimidazole ring system [Cg2···Cg2 (1 - x, -y, 1 - z) = 3.8815 (18) Å].