organic compounds
2-Bromo-4-chloro-6-(cyclohexyliminomethyl)phenol
aHebei Key Laboratory of Bioinorganic Chemistry, College of Sciences, Agricultural University of Hebei, Baoding 071001, People's Republic of China
*Correspondence e-mail: majingjun71@yahoo.cn
The title compound, C13H15BrClNO, was prepared by the condensation of equimolar quantities of 3-bromo-5-chlorosalicylaldehyde with cyclohexylamine in methanol. There is an intramolecular O—H⋯N hydrogen bond in the molecule. The cyclohexyl ring adopts a chair conformation.
Related literature
For the coordination chemistry of Schiff base compounds, see: Xu et al. (2011); Suleiman Gwaram et al. (2011); Assey et al. (2011). For standard bond lengths, see: Allen et al. (1987). For similar structures, see: Miura et al. (2009); Damous et al. (2011); Şahin et al. (2009); Orona et al. (2011).
Experimental
Crystal data
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Refinement
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Data collection: SMART (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: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supporting information
https://doi.org/10.1107/S1600536811045053/qm2039sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811045053/qm2039Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536811045053/qm2039Isup3.cml
To a methanol solution (10 ml) of 3-bromo-5-chlorosalicylaldehyde (0.1 mmol, 23.5 mg) and cyclohexylamine (0.1 mmol, 9.9 mg), a few drops of acetic acid were added. The mixture was refluxed for 1 h and then cooled to room temperature. The yellow crystalline solid was collected by filtration, washed with cold methanol and dried in air. Single crystals, suitable for X-ray diffraction, were obtained by slow evaporation of a methanol solution of the product in air.
The OH H-atom was located in a difference Fourier map and was refined with a distance restraint, O—H = 0.90 (1) Å, and Uiso(H) = 0.08 Å2. The C-bound H atoms were positioned geometrically and refined using a riding model, with C—H = 0.93–0.98 Å, with Uiso(H) = 1.2Ueq(C).
Schiff bases are versatile ligands in coordination chemistry (Xu et al., 2011; Suleiman Gwaram et al., 2011; Assey et al., 2011). As a contribution to a structural study on Schiff base compounds, we present here the
of the title compound, that was obtained as the product of the reaction of 3-bromo-5-chlorosalicylaldehyde with cyclohexylamine in methanol.In the title compound, Fig. 1, there in an intramolecular O1—H1···N1 hydrogen bond (Table 1). The C1—C6 benzene ring is approximately perpendicular to the C8—C13 cyclohexyl ring. As expected, the cyclohexyl ring adopts a chair conformation. The bond distances and angles are within normal ranges (Allen et al., 1987), and agree well with the corresponding bond distances and angles reported in closely related compounds (Miura et al., 2009; Damous et al., 2011; Şahin et al., 2009; Orona et al., 2011).
For the coordination chemistry of Schiff base compounds, see: Xu et al. (2011); Suleiman Gwaram et al. (2011); Assey et al. (2011). For standard bond lengths, see: Allen et al. (1987). For similar structures, see: Miura et al. (2009); Damous et al. (2011); Şahin et al. (2009); Orona et al. (2011).
Data collection: SMART (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: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).C13H15BrClNO | F(000) = 640 |
Mr = 316.62 | Dx = 1.532 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
a = 12.296 (2) Å | Cell parameters from 2374 reflections |
b = 16.359 (3) Å | θ = 2.5–24.1° |
c = 6.969 (1) Å | µ = 3.17 mm−1 |
β = 101.634 (2)° | T = 298 K |
V = 1373.0 (4) Å3 | Block, yellow |
Z = 4 | 0.30 × 0.30 × 0.27 mm |
Bruker SMART 1K CCD area-detector diffractometer | 2982 independent reflections |
Radiation source: fine-focus sealed tube | 1705 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.042 |
ω scan | θmax = 27.0°, θmin = 2.5° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −15→15 |
Tmin = 0.450, Tmax = 0.481 | k = −20→19 |
10912 measured reflections | l = −8→8 |
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)] = 0.073 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.227 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.1329P)2 + 0.243P] where P = (Fo2 + 2Fc2)/3 |
2982 reflections | (Δ/σ)max < 0.001 |
157 parameters | Δρmax = 1.40 e Å−3 |
1 restraint | Δρmin = −0.42 e Å−3 |
C13H15BrClNO | V = 1373.0 (4) Å3 |
Mr = 316.62 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 12.296 (2) Å | µ = 3.17 mm−1 |
b = 16.359 (3) Å | T = 298 K |
c = 6.969 (1) Å | 0.30 × 0.30 × 0.27 mm |
β = 101.634 (2)° |
Bruker SMART 1K CCD area-detector diffractometer | 2982 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 1705 reflections with I > 2σ(I) |
Tmin = 0.450, Tmax = 0.481 | Rint = 0.042 |
10912 measured reflections |
R[F2 > 2σ(F2)] = 0.073 | 1 restraint |
wR(F2) = 0.227 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | Δρmax = 1.40 e Å−3 |
2982 reflections | Δρmin = −0.42 e Å−3 |
157 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 | ||
Br1 | 0.36373 (6) | 0.05122 (4) | −0.11130 (11) | 0.0888 (4) | |
Cl1 | 0.09344 (12) | 0.31936 (13) | −0.2918 (3) | 0.0948 (6) | |
N1 | 0.6092 (4) | 0.3288 (3) | 0.0492 (7) | 0.0594 (11) | |
O1 | 0.5335 (3) | 0.1823 (2) | 0.0130 (6) | 0.0619 (9) | |
C1 | 0.4189 (4) | 0.3005 (3) | −0.0749 (6) | 0.0479 (11) | |
C2 | 0.4337 (4) | 0.2154 (3) | −0.0606 (6) | 0.0490 (11) | |
C3 | 0.3424 (4) | 0.1648 (3) | −0.1214 (7) | 0.0550 (12) | |
C4 | 0.2398 (4) | 0.1959 (4) | −0.1955 (7) | 0.0624 (14) | |
H4 | 0.1801 | 0.1612 | −0.2402 | 0.075* | |
C5 | 0.2255 (4) | 0.2799 (4) | −0.2032 (7) | 0.0616 (14) | |
C6 | 0.3129 (4) | 0.3316 (3) | −0.1472 (7) | 0.0576 (13) | |
H6 | 0.3020 | 0.3878 | −0.1572 | 0.069* | |
C7 | 0.5119 (4) | 0.3548 (3) | −0.0185 (7) | 0.0564 (12) | |
H7 | 0.5003 | 0.4109 | −0.0322 | 0.068* | |
C8 | 0.7014 (4) | 0.3862 (3) | 0.0990 (8) | 0.0601 (13) | |
H8 | 0.6719 | 0.4419 | 0.0785 | 0.072* | |
C9 | 0.7837 (5) | 0.3731 (4) | −0.0324 (9) | 0.0809 (18) | |
H9A | 0.7478 | 0.3837 | −0.1672 | 0.097* | |
H9B | 0.8083 | 0.3167 | −0.0231 | 0.097* | |
C10 | 0.8835 (6) | 0.4293 (5) | 0.0252 (12) | 0.095 (2) | |
H10A | 0.9367 | 0.4179 | −0.0569 | 0.114* | |
H10B | 0.8598 | 0.4857 | 0.0036 | 0.114* | |
C11 | 0.9385 (5) | 0.4176 (4) | 0.2383 (11) | 0.089 (2) | |
H11A | 0.9677 | 0.3625 | 0.2579 | 0.107* | |
H11B | 1.0000 | 0.4555 | 0.2730 | 0.107* | |
C12 | 0.8578 (5) | 0.4318 (5) | 0.3658 (9) | 0.0772 (18) | |
H12A | 0.8343 | 0.4885 | 0.3550 | 0.093* | |
H12B | 0.8937 | 0.4218 | 0.5010 | 0.093* | |
C13 | 0.7562 (5) | 0.3768 (4) | 0.3122 (8) | 0.0674 (14) | |
H13A | 0.7782 | 0.3203 | 0.3381 | 0.081* | |
H13B | 0.7033 | 0.3907 | 0.3934 | 0.081* | |
H1 | 0.576 (4) | 0.227 (2) | 0.035 (9) | 0.080* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Br1 | 0.0837 (6) | 0.0650 (5) | 0.1181 (7) | −0.0128 (3) | 0.0212 (4) | −0.0034 (3) |
Cl1 | 0.0463 (8) | 0.1216 (15) | 0.1084 (13) | 0.0132 (8) | −0.0034 (8) | 0.0139 (11) |
N1 | 0.050 (2) | 0.062 (3) | 0.063 (3) | −0.004 (2) | 0.0047 (19) | −0.006 (2) |
O1 | 0.0451 (19) | 0.063 (2) | 0.076 (2) | 0.0007 (16) | 0.0071 (17) | −0.0017 (18) |
C1 | 0.045 (2) | 0.059 (3) | 0.039 (2) | 0.003 (2) | 0.0040 (19) | 0.003 (2) |
C2 | 0.039 (2) | 0.071 (3) | 0.038 (2) | 0.004 (2) | 0.0115 (18) | 0.002 (2) |
C3 | 0.054 (3) | 0.064 (3) | 0.050 (3) | −0.009 (2) | 0.016 (2) | −0.004 (2) |
C4 | 0.042 (3) | 0.089 (4) | 0.054 (3) | −0.015 (3) | 0.005 (2) | 0.002 (3) |
C5 | 0.042 (3) | 0.091 (4) | 0.052 (3) | 0.007 (3) | 0.007 (2) | 0.006 (3) |
C6 | 0.051 (3) | 0.066 (3) | 0.054 (3) | 0.011 (3) | 0.009 (2) | 0.006 (2) |
C7 | 0.055 (3) | 0.056 (3) | 0.057 (3) | 0.000 (2) | 0.010 (2) | 0.002 (2) |
C8 | 0.050 (3) | 0.048 (3) | 0.076 (4) | −0.006 (2) | −0.001 (2) | −0.001 (2) |
C9 | 0.082 (4) | 0.088 (4) | 0.075 (4) | −0.025 (3) | 0.022 (3) | −0.019 (3) |
C10 | 0.082 (5) | 0.108 (5) | 0.104 (6) | −0.033 (4) | 0.039 (4) | −0.026 (4) |
C11 | 0.048 (3) | 0.088 (4) | 0.127 (6) | −0.008 (3) | 0.009 (4) | −0.006 (4) |
C12 | 0.064 (4) | 0.086 (4) | 0.077 (4) | −0.020 (3) | 0.003 (3) | −0.011 (3) |
C13 | 0.062 (3) | 0.073 (4) | 0.067 (3) | −0.016 (3) | 0.015 (3) | −0.008 (3) |
Br1—C3 | 1.875 (5) | C8—C13 | 1.510 (7) |
Cl1—C5 | 1.741 (5) | C8—H8 | 0.9800 |
N1—C7 | 1.268 (6) | C9—C10 | 1.521 (8) |
N1—C8 | 1.460 (6) | C9—H9A | 0.9700 |
O1—C2 | 1.344 (5) | C9—H9B | 0.9700 |
O1—H1 | 0.900 (10) | C10—C11 | 1.515 (10) |
C1—C6 | 1.395 (7) | C10—H10A | 0.9700 |
C1—C2 | 1.405 (7) | C10—H10B | 0.9700 |
C1—C7 | 1.440 (7) | C11—C12 | 1.478 (9) |
C2—C3 | 1.391 (7) | C11—H11A | 0.9700 |
C3—C4 | 1.363 (7) | C11—H11B | 0.9700 |
C4—C5 | 1.384 (8) | C12—C13 | 1.524 (7) |
C4—H4 | 0.9300 | C12—H12A | 0.9700 |
C5—C6 | 1.362 (7) | C12—H12B | 0.9700 |
C6—H6 | 0.9300 | C13—H13A | 0.9700 |
C7—H7 | 0.9300 | C13—H13B | 0.9700 |
C8—C9 | 1.510 (8) | ||
C7—N1—C8 | 120.1 (5) | C8—C9—H9A | 109.4 |
C2—O1—H1 | 101 (4) | C10—C9—H9A | 109.4 |
C6—C1—C2 | 119.1 (4) | C8—C9—H9B | 109.4 |
C6—C1—C7 | 120.4 (5) | C10—C9—H9B | 109.4 |
C2—C1—C7 | 120.5 (4) | H9A—C9—H9B | 108.0 |
O1—C2—C3 | 119.7 (5) | C11—C10—C9 | 111.0 (6) |
O1—C2—C1 | 121.4 (4) | C11—C10—H10A | 109.4 |
C3—C2—C1 | 118.9 (4) | C9—C10—H10A | 109.4 |
C4—C3—C2 | 121.5 (5) | C11—C10—H10B | 109.4 |
C4—C3—Br1 | 119.7 (4) | C9—C10—H10B | 109.4 |
C2—C3—Br1 | 118.7 (4) | H10A—C10—H10B | 108.0 |
C3—C4—C5 | 119.1 (5) | C12—C11—C10 | 110.4 (5) |
C3—C4—H4 | 120.5 | C12—C11—H11A | 109.6 |
C5—C4—H4 | 120.5 | C10—C11—H11A | 109.6 |
C6—C5—C4 | 121.3 (4) | C12—C11—H11B | 109.6 |
C6—C5—Cl1 | 119.8 (5) | C10—C11—H11B | 109.6 |
C4—C5—Cl1 | 118.9 (4) | H11A—C11—H11B | 108.1 |
C5—C6—C1 | 120.1 (5) | C11—C12—C13 | 112.2 (5) |
C5—C6—H6 | 119.9 | C11—C12—H12A | 109.2 |
C1—C6—H6 | 119.9 | C13—C12—H12A | 109.2 |
N1—C7—C1 | 122.2 (5) | C11—C12—H12B | 109.2 |
N1—C7—H7 | 118.9 | C13—C12—H12B | 109.2 |
C1—C7—H7 | 118.9 | H12A—C12—H12B | 107.9 |
N1—C8—C9 | 110.4 (4) | C8—C13—C12 | 111.2 (5) |
N1—C8—C13 | 109.8 (4) | C8—C13—H13A | 109.4 |
C9—C8—C13 | 111.2 (5) | C12—C13—H13A | 109.4 |
N1—C8—H8 | 108.4 | C8—C13—H13B | 109.4 |
C9—C8—H8 | 108.4 | C12—C13—H13B | 109.4 |
C13—C8—H8 | 108.4 | H13A—C13—H13B | 108.0 |
C8—C9—C10 | 111.0 (5) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N1 | 0.90 (1) | 1.71 (2) | 2.564 (6) | 159 (6) |
Experimental details
Crystal data | |
Chemical formula | C13H15BrClNO |
Mr | 316.62 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 298 |
a, b, c (Å) | 12.296 (2), 16.359 (3), 6.969 (1) |
β (°) | 101.634 (2) |
V (Å3) | 1373.0 (4) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 3.17 |
Crystal size (mm) | 0.30 × 0.30 × 0.27 |
Data collection | |
Diffractometer | Bruker SMART 1K CCD area-detector |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.450, 0.481 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 10912, 2982, 1705 |
Rint | 0.042 |
(sin θ/λ)max (Å−1) | 0.639 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.073, 0.227, 1.04 |
No. of reflections | 2982 |
No. of parameters | 157 |
No. of restraints | 1 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 1.40, −0.42 |
Computer programs: SMART (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N1 | 0.900 (10) | 1.71 (2) | 2.564 (6) | 159 (6) |
Acknowledgements
This project was sponsored by the Natural Development Foundation of Hebei Province (B2011204051), the Development Foundation of the Department of Education of Hebei Province (2010137) and the Research Development Foundation of the Agricultural University of Hebei.
References
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Schiff bases are versatile ligands in coordination chemistry (Xu et al., 2011; Suleiman Gwaram et al., 2011; Assey et al., 2011). As a contribution to a structural study on Schiff base compounds, we present here the crystal structure of the title compound, that was obtained as the product of the reaction of 3-bromo-5-chlorosalicylaldehyde with cyclohexylamine in methanol.
In the title compound, Fig. 1, there in an intramolecular O1—H1···N1 hydrogen bond (Table 1). The C1—C6 benzene ring is approximately perpendicular to the C8—C13 cyclohexyl ring. As expected, the cyclohexyl ring adopts a chair conformation. The bond distances and angles are within normal ranges (Allen et al., 1987), and agree well with the corresponding bond distances and angles reported in closely related compounds (Miura et al., 2009; Damous et al., 2011; Şahin et al., 2009; Orona et al., 2011).