Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807051744/at2430sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536807051744/at2430Isup2.hkl |
CCDC reference: 654271
Key indicators
- Single-crystal X-ray study
- T = 298 K
- Mean (C-C) = 0.008 Å
- R factor = 0.045
- wR factor = 0.106
- Data-to-parameter ratio = 13.1
checkCIF/PLATON results
No syntax errors found
Alert level C ABSTM02_ALERT_3_C The ratio of expected to reported Tmax/Tmin(RR) is > 1.10 Tmin and Tmax reported: 0.265 0.346 Tmin and Tmax expected: 0.179 0.260 RR = 1.114 Please check that your absorption correction is appropriate. PLAT060_ALERT_3_C Ratio Tmax/Tmin (Exp-to-Rep) (too) Large ....... 1.11 PLAT062_ALERT_4_C Rescale T(min) & T(max) by ..................... 0.75 PLAT341_ALERT_3_C Low Bond Precision on C-C Bonds (x 1000) Ang ... 8 PLAT420_ALERT_2_C D-H Without Acceptor N1 - H1 ... ? PLAT431_ALERT_2_C Short Inter HL..A Contact Br1 .. O2 .. 3.21 Ang. PLAT480_ALERT_4_C Long H...A H-Bond Reported H8A .. BR1 .. 3.02 Ang. PLAT480_ALERT_4_C Long H...A H-Bond Reported H8B .. BR1 .. 3.08 Ang. PLAT480_ALERT_4_C Long H...A H-Bond Reported H11 .. BR1 .. 3.09 Ang.
Alert level G ABSTM02_ALERT_3_G When printed, the submitted absorption T values will be replaced by the scaled T values. Since the ratio of scaled T's is identical to the ratio of reported T values, the scaling does not imply a change to the absorption corrections used in the study. Ratio of Tmax expected/reported 0.751 Tmax scaled 0.260 Tmin scaled 0.199 REFLT03_ALERT_4_G Please check that the estimate of the number of Friedel pairs is correct. If it is not, please give the correct count in the _publ_section_exptl_refinement section of the submitted CIF. From the CIF: _diffrn_reflns_theta_max 25.01 From the CIF: _reflns_number_total 2133 Count of symmetry unique reflns 1220 Completeness (_total/calc) 174.84% TEST3: Check Friedels for noncentro structure Estimate of Friedel pairs measured 913 Fraction of Friedel pairs measured 0.748 Are heavy atom types Z>Si present yes PLAT860_ALERT_3_G Note: Number of Least-Squares Restraints ....... 1
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 9 ALERT level C = Check and explain 3 ALERT level G = General alerts; check 0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 2 ALERT type 2 Indicator that the structure model may be wrong or deficient 5 ALERT type 3 Indicator that the structure quality may be low 5 ALERT type 4 Improvement, methodology, query or suggestion 0 ALERT type 5 Informative message, check
The mixture containing piperonaldehyde (1.5 g, 10 mmol) and 4-bromoaniline (1.72 g, 10 mmol) was refluxed for about 6 h in ethanol, then borohydride sodium(1.52 g, 40 mmol) was added and refluxed continuely for about 2 h, then acetone (20 ml) and water (40 ml) were added in turn, and the reaction mixture was cooled and the products were filtered off, washed with ethanol and dried. Colourless crystals of (I) suitatble for X-ray structure analysis were obtained by recrystallizing the crude product from ethanol (m.p.370–372 K).
All H atoms were located in difference Fourier maps. H atoms bonded to C and N atoms were treated as riding atoms, with C—H distances of 0.93 Å (aryl), 0.97 Å (methylene), N—H distances of 0.86 Å (amino), and with Uiso(H) = 1.2Ueq(C,N) (aryl, methylene, amino).
We have reported recently the crystyl structure of an aniline derives (Yang et al., 2007). As part of our study of the aniline derives, we report here the crystal structures of (I) (Fig.1).
The title compound(I), crystallizes in the orthorhombic space group Pca21 with Z = 4. In (I), the dihedral angle between the two benzene rings are 59.8 (1)°. Geometric parameters of (I) are normal (Allen et al., 1987) and selected geometric parameters are listed in the Table 1. The aniline N1—C9 bonds length is 1.391 (7) Å, this value is near with the aniline C—N bonds of the analogs reported (C—N = 1.396 Å, Silversides et al., C—N = 1.396 (5) Å, Yyang et al. 2007), but slightly shorter than the aniline C—N bonds of the analog reported (C—N = 1.414 Å, Koşar et al., 2004), this is probably due to the weakly inductive negative effect of the bromine atom on the aryl residue.
In the crystal structure of (I), the molecules are linked by one C—H···Br hydrogen bond into a simple C(13) chain (Bernstein et al., 1995) running parallel to the [010] direction. The atom C8 in the molecule at (x, y, z) acts as a hydrogen-bond donor, via H8a, to the atom Br1 in the molecule at (x, -1 + y, z). These chains are linked by further C—H···π and C—H···Br hydrogen bonds, resulting in a three-dimensional network structure (Table 2 and Fig. 2).
For related literature, see: Allen et al. (1987); Bernstein et al. (1995); Koşar et al. (2004); Silversides et al. (2006); Yang et al. (2007).
Data collection: SMART (Siemens, 1996); cell refinement: SAINT (Siemens, 1996); data reduction: SAINT (Siemens, 1996); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997a); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997a); molecular graphics: SHELXTL (Sheldrick, 1997b); software used to prepare material for publication: SHELXTL (Sheldrick, 1997b).
C14H12BrNO2 | Dx = 1.631 Mg m−3 |
Mr = 306.16 | Melting point: 370 K |
Orthorhombic, Pca21 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2c -2ac | Cell parameters from 1828 reflections |
a = 14.6264 (13) Å | θ = 2.8–25.8° |
b = 14.2650 (12) Å | µ = 3.29 mm−1 |
c = 5.9752 (8) Å | T = 298 K |
V = 1246.7 (2) Å3 | Block, yellow |
Z = 4 | 0.55 × 0.48 × 0.41 mm |
F(000) = 616 |
Siemens SMART 1000 CCD area-detector diffractometer | 2133 independent reflections |
Radiation source: fine-focus sealed tube | 1641 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.050 |
φ and ω scans | θmax = 25.0°, θmin = 2.0° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −11→17 |
Tmin = 0.265, Tmax = 0.346 | k = −15→16 |
4925 measured reflections | l = −7→7 |
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)] = 0.045 | H-atom parameters constrained |
wR(F2) = 0.106 | w = 1/[σ2(Fo2) + (0.0507P)2] where P = (Fo2 + 2Fc2)/3 |
S = 1.06 | (Δ/σ)max = 0.001 |
2133 reflections | Δρmax = 0.35 e Å−3 |
163 parameters | Δρmin = −0.47 e Å−3 |
1 restraint | Absolute structure: Flack (1983), 917 Freidel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: −0.028 (18) |
C14H12BrNO2 | V = 1246.7 (2) Å3 |
Mr = 306.16 | Z = 4 |
Orthorhombic, Pca21 | Mo Kα radiation |
a = 14.6264 (13) Å | µ = 3.29 mm−1 |
b = 14.2650 (12) Å | T = 298 K |
c = 5.9752 (8) Å | 0.55 × 0.48 × 0.41 mm |
Siemens SMART 1000 CCD area-detector diffractometer | 2133 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 1641 reflections with I > 2σ(I) |
Tmin = 0.265, Tmax = 0.346 | Rint = 0.050 |
4925 measured reflections |
R[F2 > 2σ(F2)] = 0.045 | H-atom parameters constrained |
wR(F2) = 0.106 | Δρmax = 0.35 e Å−3 |
S = 1.06 | Δρmin = −0.47 e Å−3 |
2133 reflections | Absolute structure: Flack (1983), 917 Freidel pairs |
163 parameters | Absolute structure parameter: −0.028 (18) |
1 restraint |
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 | ||
N1 | 0.6106 (3) | 0.7514 (4) | 0.8425 (10) | 0.0380 (12) | |
H1 | 0.5825 | 0.7105 | 0.9227 | 0.046* | |
O1 | 0.6680 (3) | 0.3832 (3) | 0.8088 (8) | 0.0518 (12) | |
O2 | 0.6013 (3) | 0.3398 (3) | 0.4741 (9) | 0.0499 (12) | |
Br1 | 0.62189 (4) | 1.15367 (4) | 1.17625 (16) | 0.0473 (2) | |
C1 | 0.6536 (4) | 0.7235 (4) | 0.6345 (13) | 0.0416 (17) | |
H1a | 0.7190 | 0.7340 | 0.6446 | 0.050* | |
H1b | 0.6301 | 0.7617 | 0.5132 | 0.050* | |
C2 | 0.6358 (4) | 0.6212 (4) | 0.5839 (10) | 0.0328 (14) | |
C3 | 0.6636 (3) | 0.5539 (4) | 0.7388 (9) | 0.0334 (15) | |
H3 | 0.6907 | 0.5704 | 0.8741 | 0.040* | |
C4 | 0.6491 (3) | 0.4622 (4) | 0.6815 (15) | 0.0334 (11) | |
C5 | 0.6106 (4) | 0.4358 (4) | 0.4820 (11) | 0.0328 (14) | |
C6 | 0.5841 (4) | 0.5002 (4) | 0.3254 (11) | 0.0365 (15) | |
H6 | 0.5588 | 0.4826 | 0.1889 | 0.044* | |
C7 | 0.5974 (4) | 0.5944 (4) | 0.3832 (10) | 0.0361 (14) | |
H7 | 0.5797 | 0.6406 | 0.2823 | 0.043* | |
C8 | 0.6530 (4) | 0.3075 (4) | 0.6599 (17) | 0.0570 (18) | |
H8a | 0.6201 | 0.2578 | 0.7360 | 0.068* | |
H8b | 0.7111 | 0.2826 | 0.6090 | 0.068* | |
C9 | 0.6144 (3) | 0.8443 (4) | 0.9130 (11) | 0.0318 (13) | |
C14 | 0.5678 (4) | 0.8713 (4) | 1.1078 (9) | 0.0368 (16) | |
H14 | 0.5339 | 0.8269 | 1.1860 | 0.044* | |
C13 | 0.5708 (3) | 0.9618 (3) | 1.1860 (13) | 0.0348 (12) | |
H13 | 0.5391 | 0.9786 | 1.3147 | 0.042* | |
C12 | 0.6215 (4) | 1.0273 (4) | 1.0709 (10) | 0.0335 (14) | |
C11 | 0.6678 (4) | 1.0037 (4) | 0.8828 (11) | 0.0363 (15) | |
H11 | 0.7012 | 1.0492 | 0.8069 | 0.044* | |
C10 | 0.6662 (4) | 0.9125 (4) | 0.8017 (11) | 0.0375 (14) | |
H10 | 0.6992 | 0.8967 | 0.6742 | 0.045* |
U11 | U22 | U33 | U12 | U13 | U23 | |
N1 | 0.054 (3) | 0.016 (2) | 0.045 (3) | −0.007 (2) | 0.007 (2) | 0.000 (2) |
O1 | 0.075 (3) | 0.028 (2) | 0.052 (3) | 0.004 (2) | −0.019 (2) | 0.005 (2) |
O2 | 0.067 (3) | 0.025 (3) | 0.058 (3) | −0.001 (2) | −0.009 (2) | −0.007 (2) |
Br1 | 0.0532 (3) | 0.0253 (3) | 0.0635 (4) | −0.0009 (3) | 0.0084 (5) | −0.0109 (4) |
C1 | 0.060 (3) | 0.026 (3) | 0.039 (5) | −0.008 (3) | 0.010 (3) | −0.002 (3) |
C2 | 0.037 (3) | 0.026 (3) | 0.036 (4) | 0.003 (3) | 0.006 (2) | −0.001 (3) |
C3 | 0.037 (3) | 0.035 (4) | 0.028 (4) | −0.001 (3) | −0.004 (2) | −0.003 (3) |
C4 | 0.038 (2) | 0.029 (3) | 0.034 (3) | 0.000 (2) | −0.004 (4) | 0.004 (4) |
C5 | 0.039 (3) | 0.022 (3) | 0.038 (4) | 0.001 (3) | 0.002 (3) | −0.004 (3) |
C6 | 0.044 (3) | 0.036 (4) | 0.030 (4) | −0.001 (3) | −0.009 (3) | −0.005 (3) |
C7 | 0.048 (3) | 0.028 (3) | 0.033 (4) | 0.004 (3) | −0.005 (3) | 0.007 (3) |
C8 | 0.078 (4) | 0.028 (3) | 0.065 (5) | 0.005 (3) | −0.016 (5) | 0.002 (5) |
C9 | 0.030 (3) | 0.025 (3) | 0.040 (4) | 0.002 (3) | −0.002 (2) | 0.001 (3) |
C14 | 0.037 (3) | 0.033 (3) | 0.040 (4) | −0.005 (3) | 0.010 (2) | 0.004 (3) |
C13 | 0.037 (2) | 0.032 (3) | 0.035 (3) | 0.001 (2) | 0.002 (4) | −0.011 (4) |
C12 | 0.030 (3) | 0.024 (3) | 0.047 (4) | 0.000 (3) | −0.002 (3) | −0.003 (3) |
C11 | 0.037 (3) | 0.022 (3) | 0.050 (4) | −0.005 (2) | 0.013 (3) | −0.001 (3) |
C10 | 0.041 (3) | 0.029 (4) | 0.042 (4) | 0.001 (3) | 0.009 (3) | −0.002 (3) |
N1—C9 | 1.391 (7) | C5—C6 | 1.368 (8) |
N1—C1 | 1.450 (9) | C6—C7 | 1.400 (7) |
N1—H1 | 0.8600 | C6—H6 | 0.9300 |
O1—C4 | 1.387 (8) | C7—H7 | 0.9300 |
O1—C8 | 1.417 (9) | C8—H8a | 0.9700 |
O2—C5 | 1.377 (6) | C8—H8b | 0.9700 |
O2—C8 | 1.420 (10) | C9—C10 | 1.401 (8) |
Br1—C12 | 1.910 (6) | C9—C14 | 1.404 (8) |
C1—C2 | 1.512 (8) | C14—C13 | 1.373 (7) |
C1—H1a | 0.9700 | C14—H14 | 0.9300 |
C1—H1b | 0.9700 | C13—C12 | 1.377 (8) |
C2—C7 | 1.379 (8) | C13—H13 | 0.9300 |
C2—C3 | 1.395 (7) | C12—C11 | 1.355 (8) |
C3—C4 | 1.368 (7) | C11—C10 | 1.389 (7) |
C3—H3 | 0.9300 | C11—H11 | 0.9300 |
C4—C5 | 1.372 (10) | C10—H10 | 0.9300 |
C9—N1—C1 | 120.3 (5) | C2—C7—H7 | 118.7 |
C9—N1—H1 | 119.9 | C6—C7—H7 | 118.7 |
C1—N1—H1 | 119.9 | O1—C8—O2 | 109.0 (5) |
C4—O1—C8 | 104.1 (6) | O1—C8—H8a | 109.9 |
C5—O2—C8 | 104.1 (5) | O2—C8—H8a | 109.9 |
N1—C1—C2 | 111.2 (5) | O1—C8—H8b | 109.9 |
N1—C1—H1a | 109.4 | O2—C8—H8b | 109.9 |
C2—C1—H1a | 109.4 | H8a—C8—H8b | 108.3 |
N1—C1—H1b | 109.4 | N1—C9—C10 | 122.6 (6) |
C2—C1—H1b | 109.4 | N1—C9—C14 | 119.6 (5) |
H1a—C1—H1b | 108.0 | C10—C9—C14 | 117.7 (5) |
C7—C2—C3 | 120.3 (6) | C13—C14—C9 | 121.7 (5) |
C7—C2—C1 | 120.8 (6) | C13—C14—H14 | 119.2 |
C3—C2—C1 | 118.8 (6) | C9—C14—H14 | 119.2 |
C4—C3—C2 | 116.5 (6) | C14—C13—C12 | 119.0 (6) |
C4—C3—H3 | 121.7 | C14—C13—H13 | 120.5 |
C2—C3—H3 | 121.7 | C12—C13—H13 | 120.5 |
C3—C4—C5 | 123.0 (6) | C11—C12—C13 | 121.0 (5) |
C3—C4—O1 | 127.4 (7) | C11—C12—Br1 | 120.4 (4) |
C5—C4—O1 | 109.6 (5) | C13—C12—Br1 | 118.5 (4) |
C6—C5—C4 | 121.8 (5) | C12—C11—C10 | 120.9 (6) |
C6—C5—O2 | 128.1 (6) | C12—C11—H11 | 119.6 |
C4—C5—O2 | 110.1 (5) | C10—C11—H11 | 119.6 |
C5—C6—C7 | 115.9 (6) | C11—C10—C9 | 119.7 (6) |
C5—C6—H6 | 122.1 | C11—C10—H10 | 120.2 |
C7—C6—H6 | 122.1 | C9—C10—H10 | 120.2 |
C2—C7—C6 | 122.5 (6) | ||
C9—N1—C1—C2 | −176.4 (5) | C1—C2—C7—C6 | 176.7 (5) |
N1—C1—C2—C7 | 125.0 (6) | C5—C6—C7—C2 | 0.8 (8) |
N1—C1—C2—C3 | −58.5 (7) | C4—O1—C8—O2 | −16.7 (7) |
C7—C2—C3—C4 | −1.1 (8) | C5—O2—C8—O1 | 17.4 (7) |
C1—C2—C3—C4 | −177.6 (5) | C1—N1—C9—C10 | −6.2 (8) |
C2—C3—C4—C5 | 0.9 (8) | C1—N1—C9—C14 | 176.2 (6) |
C2—C3—C4—O1 | −177.9 (5) | N1—C9—C14—C13 | 178.9 (5) |
C8—O1—C4—C3 | −171.6 (6) | C10—C9—C14—C13 | 1.2 (8) |
C8—O1—C4—C5 | 9.5 (6) | C9—C14—C13—C12 | −0.5 (8) |
C3—C4—C5—C6 | 0.2 (9) | C14—C13—C12—C11 | 0.2 (9) |
O1—C4—C5—C6 | 179.2 (5) | C14—C13—C12—Br1 | 178.0 (4) |
C3—C4—C5—O2 | −177.8 (5) | O2i—Br1—C12—C11 | −165.5 (5) |
O1—C4—C5—O2 | 1.3 (7) | O2i—Br1—C12—C13 | 16.6 (10) |
C8—O2—C5—C6 | 170.9 (6) | C13—C12—C11—C10 | −0.6 (9) |
C8—O2—C5—C4 | −11.4 (7) | Br1—C12—C11—C10 | −178.4 (4) |
C4—C5—C6—C7 | −1.0 (9) | C12—C11—C10—C9 | 1.3 (9) |
O2—C5—C6—C7 | 176.5 (5) | N1—C9—C10—C11 | −179.2 (5) |
C3—C2—C7—C6 | 0.3 (9) | C14—C9—C10—C11 | −1.6 (8) |
Symmetry code: (i) x, y+1, z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
C8—H8a···Br1ii | 0.97 | 3.02 | 3.813 (9) | 140 |
C8—H8b···Br1iii | 0.97 | 3.08 | 3.958 (6) | 151 |
C11—H11···Br1iv | 0.93 | 3.09 | 3.944 (6) | 154 |
C6—H6···Cg1v | 0.93 | 2.83 | 3.53 (2) | 133 |
C13—H13···Cg2vi | 0.93 | 2.81 | 3.62 (2) | 147 |
Symmetry codes: (ii) x, y−1, z; (iii) −x+3/2, y−1, z−1/2; (iv) −x+3/2, y, z−1/2; (v) −x+1, −y+1, z−1/2; (vi) −x+1, −y+2, z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C14H12BrNO2 |
Mr | 306.16 |
Crystal system, space group | Orthorhombic, Pca21 |
Temperature (K) | 298 |
a, b, c (Å) | 14.6264 (13), 14.2650 (12), 5.9752 (8) |
V (Å3) | 1246.7 (2) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 3.29 |
Crystal size (mm) | 0.55 × 0.48 × 0.41 |
Data collection | |
Diffractometer | Siemens SMART 1000 CCD area-detector |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.265, 0.346 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 4925, 2133, 1641 |
Rint | 0.050 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.045, 0.106, 1.06 |
No. of reflections | 2133 |
No. of parameters | 163 |
No. of restraints | 1 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.35, −0.47 |
Absolute structure | Flack (1983), 917 Freidel pairs |
Absolute structure parameter | −0.028 (18) |
Computer programs: SMART (Siemens, 1996), SAINT (Siemens, 1996), SHELXS97 (Sheldrick, 1997a), SHELXL97 (Sheldrick, 1997a), SHELXTL (Sheldrick, 1997b).
D—H···A | D—H | H···A | D···A | D—H···A |
C8—H8a···Br1i | 0.97 | 3.02 | 3.813 (9) | 139.8 |
C8—H8b···Br1ii | 0.97 | 3.08 | 3.958 (6) | 150.6 |
C11—H11···Br1iii | 0.93 | 3.09 | 3.944 (6) | 154.2 |
C6—H6···Cg1iv | 0.93 | 2.83 | 3.53 (2) | 132.8 |
C13—H13···Cg2v | 0.93 | 2.81 | 3.62 (2) | 146.6 |
Symmetry codes: (i) x, y−1, z; (ii) −x+3/2, y−1, z−1/2; (iii) −x+3/2, y, z−1/2; (iv) −x+1, −y+1, z−1/2; (v) −x+1, −y+2, z+1/2. |
We have reported recently the crystyl structure of an aniline derives (Yang et al., 2007). As part of our study of the aniline derives, we report here the crystal structures of (I) (Fig.1).
The title compound(I), crystallizes in the orthorhombic space group Pca21 with Z = 4. In (I), the dihedral angle between the two benzene rings are 59.8 (1)°. Geometric parameters of (I) are normal (Allen et al., 1987) and selected geometric parameters are listed in the Table 1. The aniline N1—C9 bonds length is 1.391 (7) Å, this value is near with the aniline C—N bonds of the analogs reported (C—N = 1.396 Å, Silversides et al., C—N = 1.396 (5) Å, Yyang et al. 2007), but slightly shorter than the aniline C—N bonds of the analog reported (C—N = 1.414 Å, Koşar et al., 2004), this is probably due to the weakly inductive negative effect of the bromine atom on the aryl residue.
In the crystal structure of (I), the molecules are linked by one C—H···Br hydrogen bond into a simple C(13) chain (Bernstein et al., 1995) running parallel to the [010] direction. The atom C8 in the molecule at (x, y, z) acts as a hydrogen-bond donor, via H8a, to the atom Br1 in the molecule at (x, -1 + y, z). These chains are linked by further C—H···π and C—H···Br hydrogen bonds, resulting in a three-dimensional network structure (Table 2 and Fig. 2).