organic compounds
(E)-4-[(4-Bromobenzylidene)amino]phenol
aDepartment of Physics, Panimalar Institute of Technology, Chennai 602 103, India, bDepartment of Physics, SRM University, Kattankulathur Campus, Chennai, India, cDepartment of Chemistry, SRM University, Ramapuram Campus, Chennai 600 089, India, dDepartment of Physics, AMET University, Kanathur, Chennai 603 112, India, and eDepartment of Research and Development, PRIST University, Vallam, Thanjavur 613 403, Tamil Nadu, India
*Correspondence e-mail: manivan_1999@yahoo.com
In the title compound, C13H10BrNO, the dihedral angle between the benzene rings is 35.20 (8)°. In the crystal, molecules are linked by O—H⋯N hydrogen bonds, forming a zigzag chain along the a axis. A weak C—H⋯π interaction is observed between the chains.
Related literature
For the biological activity of benzylidene derivatives, see: El Masry et al. (2000); Fegade et al. (2009); Foroumadi et al. (2007); Hodnett & Dunn (1970); Hu & Zhou (2004); Jada et al. (2008); Samadhiya & Halve (2001); Singh & Dash (1988). For related structures, see: Cui et al. (2009); Sun et al. (2009). For bond-length data, see: Allen et al. (1987).
Experimental
Crystal data
|
Refinement
|
Data collection: APEX2 (Bruker, 2004); cell SAINT (Bruker, 2004); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S160053680905538X/is2508sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S160053680905538X/is2508Isup2.hkl
A mixture of 4-bromobenzaldehyde (5 mmol), 4-aminophenol (5 mmol) and ethanol (40 ml) was refluxed for 2 h. It was then allowed to cool and filtered. Recrystallization of the crude product from ethanol yielded brown colored crystals.
H atoms were positioned geometrically and refined using riding model, with O—H = 0.82 Å and Uiso(H) = 1.2Ueq(O), and C—H = 0.93 Å and Uiso(H) = 1.2Ueq(C).
Benzylidene derivatives exhibit antitumor (Hu & Zhou 2004) and antioxidant (Foroumadi et al., 2007) activities. Some N-benzylidene aniline derivatives show biological activities sucs as antibacterial (El Masry et al., 2000), antifungal (Singh & Dash, 1988), anticancer (Hodnett & Dunn, 1970) and herbicidal (Samadhiya & Halve, 2001). In addition, benzylidene derivatives of andrographolide are potential anticancer agents (Jada et al., 2008) and some of the benzylidene derivatives are acting as selective cyclooxygenase-2-inhibitors (Fegade et al., 2009).
The geometric parameters of the title compound (Fig. 1) agree well with reported similar structures (Cui et al., 2009; Sun et al., 2009). The dihedral angle between the benzene rings is 35.20 (8)°. The C—Br bond distance is 1.894 (2) Å, which is comparable to the literature value of 1.883 (15) Å (Allen et al., 1987). The crystal packing is stabilized by an O—H···N hydrogen bond and a weak C—H···π interaction (Table 1).
For the biological activity of benzylidene derivatives, see: El Masry et al. (2000); Fegade et al. (2009); Foroumadi et al. (2007); Hodnett & Dunn (1970); Hu & Zhou (2004); Jada et al. (2008); Samadhiya & Halve (2001); Singh & Dash (1988). For related structures, see: Cui et al. (2009); Sun et al. (2009). For bond-length data, see: Allen et al. (1987).
Data collection: APEX2 (Bruker, 2004); cell
SAINT (Bruker, 2004); data reduction: SAINT (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).Fig. 1. The molecular structure of the title compound, with atom labels and 30% probability displacement ellipsoids for non-H atoms. |
C13H10BrNO | F(000) = 1104 |
Mr = 276.13 | Dx = 1.626 Mg m−3 |
Orthorhombic, Pbca | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2ab | Cell parameters from 2371 reflections |
a = 12.7035 (4) Å | θ = 2.4–23.7° |
b = 10.3897 (3) Å | µ = 3.62 mm−1 |
c = 17.0899 (6) Å | T = 295 K |
V = 2255.62 (12) Å3 | Block, brown |
Z = 8 | 0.20 × 0.16 × 0.15 mm |
Bruker Kappa APEXII CCD diffractometer | 2670 independent reflections |
Radiation source: fine-focus sealed tube | 1710 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.043 |
ω and φ scans | θmax = 27.8°, θmin = 2.4° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −12→16 |
Tmin = 0.503, Tmax = 0.581 | k = −12→13 |
13273 measured reflections | l = −22→22 |
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)] = 0.035 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.086 | H-atom parameters constrained |
S = 1.00 | w = 1/[σ2(Fo2) + (0.0358P)2 + 0.8359P] where P = (Fo2 + 2Fc2)/3 |
2670 reflections | (Δ/σ)max = 0.001 |
146 parameters | Δρmax = 0.49 e Å−3 |
0 restraints | Δρmin = −0.40 e Å−3 |
C13H10BrNO | V = 2255.62 (12) Å3 |
Mr = 276.13 | Z = 8 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 12.7035 (4) Å | µ = 3.62 mm−1 |
b = 10.3897 (3) Å | T = 295 K |
c = 17.0899 (6) Å | 0.20 × 0.16 × 0.15 mm |
Bruker Kappa APEXII CCD diffractometer | 2670 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 1710 reflections with I > 2σ(I) |
Tmin = 0.503, Tmax = 0.581 | Rint = 0.043 |
13273 measured reflections |
R[F2 > 2σ(F2)] = 0.035 | 0 restraints |
wR(F2) = 0.086 | H-atom parameters constrained |
S = 1.00 | Δρmax = 0.49 e Å−3 |
2670 reflections | Δρmin = −0.40 e Å−3 |
146 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. |
x | y | z | Uiso*/Ueq | ||
C1 | 0.16600 (18) | 0.0270 (2) | 0.54592 (14) | 0.0371 (6) | |
C2 | 0.2620 (2) | −0.0367 (3) | 0.54384 (16) | 0.0463 (7) | |
H2 | 0.2727 | −0.1086 | 0.5753 | 0.056* | |
C3 | 0.34124 (19) | 0.0056 (3) | 0.49578 (18) | 0.0520 (7) | |
H3 | 0.4054 | −0.0374 | 0.4944 | 0.062* | |
C4 | 0.32501 (19) | 0.1120 (3) | 0.44968 (15) | 0.0422 (6) | |
C5 | 0.2319 (2) | 0.1769 (3) | 0.45068 (16) | 0.0463 (7) | |
H5 | 0.2220 | 0.2490 | 0.4192 | 0.056* | |
C6 | 0.1528 (2) | 0.1340 (3) | 0.49907 (16) | 0.0449 (7) | |
H6 | 0.0891 | 0.1780 | 0.5002 | 0.054* | |
C7 | 0.07751 (18) | −0.0183 (3) | 0.59347 (15) | 0.0383 (6) | |
H7 | 0.0158 | 0.0298 | 0.5927 | 0.046* | |
C8 | −0.01245 (17) | −0.1551 (2) | 0.67752 (14) | 0.0325 (5) | |
C9 | −0.08369 (16) | −0.0690 (2) | 0.70991 (15) | 0.0365 (6) | |
H9 | −0.0736 | 0.0189 | 0.7031 | 0.044* | |
C10 | −0.16897 (17) | −0.1120 (2) | 0.75198 (14) | 0.0368 (6) | |
H10 | −0.2155 | −0.0532 | 0.7740 | 0.044* | |
C11 | −0.18585 (16) | −0.2426 (2) | 0.76165 (15) | 0.0360 (6) | |
C12 | −0.11568 (19) | −0.3294 (2) | 0.72949 (16) | 0.0412 (6) | |
H12 | −0.1267 | −0.4174 | 0.7355 | 0.049* | |
C13 | −0.02907 (18) | −0.2855 (2) | 0.68836 (15) | 0.0388 (6) | |
H13 | 0.0186 | −0.3443 | 0.6677 | 0.047* | |
N1 | 0.07946 (14) | −0.1183 (2) | 0.63553 (12) | 0.0367 (5) | |
O1 | −0.26777 (13) | −0.29148 (18) | 0.80295 (12) | 0.0497 (5) | |
H1 | −0.3015 | −0.2324 | 0.8226 | 0.075* | |
Br1 | 0.43298 (2) | 0.16639 (3) | 0.38080 (2) | 0.06483 (15) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0383 (13) | 0.0383 (15) | 0.0348 (14) | −0.0034 (11) | −0.0019 (11) | −0.0038 (12) |
C2 | 0.0458 (14) | 0.0461 (16) | 0.0471 (16) | 0.0036 (12) | 0.0056 (13) | 0.0117 (14) |
C3 | 0.0386 (14) | 0.0573 (19) | 0.0599 (19) | 0.0045 (13) | 0.0086 (14) | 0.0115 (15) |
C4 | 0.0427 (14) | 0.0468 (16) | 0.0371 (15) | −0.0113 (12) | 0.0046 (12) | 0.0009 (13) |
C5 | 0.0549 (16) | 0.0432 (16) | 0.0407 (16) | −0.0024 (13) | 0.0003 (13) | 0.0081 (13) |
C6 | 0.0406 (14) | 0.0464 (17) | 0.0476 (17) | 0.0047 (11) | 0.0009 (13) | 0.0066 (13) |
C7 | 0.0322 (13) | 0.0420 (16) | 0.0406 (14) | 0.0007 (10) | −0.0006 (11) | −0.0023 (13) |
C8 | 0.0268 (11) | 0.0357 (14) | 0.0349 (13) | −0.0010 (10) | −0.0028 (10) | 0.0021 (11) |
C9 | 0.0337 (12) | 0.0305 (13) | 0.0452 (16) | −0.0010 (10) | −0.0018 (11) | 0.0006 (12) |
C10 | 0.0332 (13) | 0.0360 (15) | 0.0411 (15) | 0.0066 (10) | −0.0012 (11) | −0.0013 (12) |
C11 | 0.0291 (12) | 0.0387 (16) | 0.0403 (15) | 0.0004 (10) | 0.0010 (11) | 0.0041 (11) |
C12 | 0.0361 (12) | 0.0308 (14) | 0.0566 (18) | 0.0013 (11) | 0.0019 (12) | 0.0056 (13) |
C13 | 0.0319 (12) | 0.0364 (15) | 0.0480 (16) | 0.0076 (11) | 0.0022 (11) | 0.0021 (13) |
N1 | 0.0314 (10) | 0.0404 (12) | 0.0384 (13) | −0.0021 (8) | 0.0016 (9) | 0.0000 (10) |
O1 | 0.0371 (10) | 0.0431 (11) | 0.0688 (14) | 0.0020 (8) | 0.0169 (9) | 0.0058 (10) |
Br1 | 0.0582 (2) | 0.0736 (3) | 0.0627 (2) | −0.01461 (15) | 0.01935 (16) | 0.01033 (18) |
C1—C6 | 1.380 (4) | C8—C13 | 1.383 (3) |
C1—C2 | 1.388 (3) | C8—C9 | 1.388 (3) |
C1—C7 | 1.465 (3) | C8—N1 | 1.423 (3) |
C2—C3 | 1.371 (4) | C9—C10 | 1.375 (3) |
C2—H2 | 0.9300 | C9—H9 | 0.9300 |
C3—C4 | 1.373 (4) | C10—C11 | 1.383 (4) |
C3—H3 | 0.9300 | C10—H10 | 0.9300 |
C4—C5 | 1.362 (4) | C11—O1 | 1.356 (3) |
C4—Br1 | 1.894 (2) | C11—C12 | 1.382 (3) |
C5—C6 | 1.376 (4) | C12—C13 | 1.383 (3) |
C5—H5 | 0.9300 | C12—H12 | 0.9300 |
C6—H6 | 0.9300 | C13—H13 | 0.9300 |
C7—N1 | 1.264 (3) | O1—H1 | 0.8200 |
C7—H7 | 0.9300 | ||
C6—C1—C2 | 118.4 (2) | C13—C8—C9 | 118.6 (2) |
C6—C1—C7 | 119.2 (2) | C13—C8—N1 | 117.1 (2) |
C2—C1—C7 | 122.4 (2) | C9—C8—N1 | 124.3 (2) |
C3—C2—C1 | 120.5 (3) | C10—C9—C8 | 120.9 (2) |
C3—C2—H2 | 119.8 | C10—C9—H9 | 119.6 |
C1—C2—H2 | 119.8 | C8—C9—H9 | 119.6 |
C2—C3—C4 | 119.4 (2) | C9—C10—C11 | 120.2 (2) |
C2—C3—H3 | 120.3 | C9—C10—H10 | 119.9 |
C4—C3—H3 | 120.3 | C11—C10—H10 | 119.9 |
C5—C4—C3 | 121.5 (2) | O1—C11—C12 | 117.2 (2) |
C5—C4—Br1 | 119.3 (2) | O1—C11—C10 | 123.3 (2) |
C3—C4—Br1 | 119.2 (2) | C12—C11—C10 | 119.5 (2) |
C4—C5—C6 | 118.7 (3) | C11—C12—C13 | 120.0 (2) |
C4—C5—H5 | 120.6 | C11—C12—H12 | 120.0 |
C6—C5—H5 | 120.6 | C13—C12—H12 | 120.0 |
C5—C6—C1 | 121.4 (2) | C12—C13—C8 | 120.8 (2) |
C5—C6—H6 | 119.3 | C12—C13—H13 | 119.6 |
C1—C6—H6 | 119.3 | C8—C13—H13 | 119.6 |
N1—C7—C1 | 124.4 (2) | C7—N1—C8 | 119.4 (2) |
N1—C7—H7 | 117.8 | C11—O1—H1 | 109.5 |
C1—C7—H7 | 117.8 | ||
C6—C1—C2—C3 | −0.5 (4) | N1—C8—C9—C10 | −177.8 (2) |
C7—C1—C2—C3 | 177.0 (3) | C8—C9—C10—C11 | −1.0 (4) |
C1—C2—C3—C4 | 0.1 (5) | C9—C10—C11—O1 | 179.4 (2) |
C2—C3—C4—C5 | 0.2 (5) | C9—C10—C11—C12 | 0.8 (4) |
C2—C3—C4—Br1 | −177.9 (2) | O1—C11—C12—C13 | −178.4 (2) |
C3—C4—C5—C6 | −0.1 (4) | C10—C11—C12—C13 | 0.3 (4) |
Br1—C4—C5—C6 | 177.9 (2) | C11—C12—C13—C8 | −1.2 (4) |
C4—C5—C6—C1 | −0.2 (4) | C9—C8—C13—C12 | 1.0 (4) |
C2—C1—C6—C5 | 0.5 (4) | N1—C8—C13—C12 | 179.1 (2) |
C7—C1—C6—C5 | −177.0 (3) | C1—C7—N1—C8 | −178.2 (2) |
C6—C1—C7—N1 | 176.6 (3) | C13—C8—N1—C7 | 147.6 (3) |
C2—C1—C7—N1 | −0.9 (4) | C9—C8—N1—C7 | −34.5 (4) |
C13—C8—C9—C10 | 0.1 (4) |
Cg1 is the centroid of the C8–C13 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N1i | 0.82 | 2.05 | 2.848 (3) | 164 |
C5—H5···Cg1ii | 0.93 | 2.89 | 3.374 (3) | 114 |
Symmetry codes: (i) x−1/2, y, −z+3/2; (ii) −x, −y, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C13H10BrNO |
Mr | 276.13 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 295 |
a, b, c (Å) | 12.7035 (4), 10.3897 (3), 17.0899 (6) |
V (Å3) | 2255.62 (12) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 3.62 |
Crystal size (mm) | 0.20 × 0.16 × 0.15 |
Data collection | |
Diffractometer | Bruker Kappa APEXII CCD |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.503, 0.581 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 13273, 2670, 1710 |
Rint | 0.043 |
(sin θ/λ)max (Å−1) | 0.657 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.035, 0.086, 1.00 |
No. of reflections | 2670 |
No. of parameters | 146 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.49, −0.40 |
Computer programs: APEX2 (Bruker, 2004), SAINT (Bruker, 2004), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2009).
Cg1 is the centroid of the C8–C13 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N1i | 0.82 | 2.05 | 2.848 (3) | 164 |
C5—H5···Cg1ii | 0.93 | 2.89 | 3.374 (3) | 114 |
Symmetry codes: (i) x−1/2, y, −z+3/2; (ii) −x, −y, −z+1. |
Acknowledgements
The authors wish to acknowledge the SAIF, IIT, Madras, for the data collection.
References
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Benzylidene derivatives exhibit antitumor (Hu & Zhou 2004) and antioxidant (Foroumadi et al., 2007) activities. Some N-benzylidene aniline derivatives show biological activities sucs as antibacterial (El Masry et al., 2000), antifungal (Singh & Dash, 1988), anticancer (Hodnett & Dunn, 1970) and herbicidal (Samadhiya & Halve, 2001). In addition, benzylidene derivatives of andrographolide are potential anticancer agents (Jada et al., 2008) and some of the benzylidene derivatives are acting as selective cyclooxygenase-2-inhibitors (Fegade et al., 2009).
The geometric parameters of the title compound (Fig. 1) agree well with reported similar structures (Cui et al., 2009; Sun et al., 2009). The dihedral angle between the benzene rings is 35.20 (8)°. The C—Br bond distance is 1.894 (2) Å, which is comparable to the literature value of 1.883 (15) Å (Allen et al., 1987). The crystal packing is stabilized by an O—H···N hydrogen bond and a weak C—H···π interaction (Table 1).