organic compounds
3-Bromo-N′-(3,5-dichloro-2-hydroxybenzylidene)benzohydrazide
aDepartment of Chemistry, Huainan Normal College, Huainan 232001, People's Republic of China
*Correspondence e-mail: huainanweiyijun@163.com
The title compound, C14H9BrCl2N2O2, was prepared by the reaction of 3,5-dichloro-2-hydroxybenzaldehyde and 3-bromobenzohydrazide in methanol. The dihedral angle between the two benzene rings is 13.0 (2)°. An intramolecular O—H⋯N hydrogen bond is observed. The molecules are linked into chains along the c axis by intermolecular N—H⋯O hydrogen bonds.
Related literature
For the synthesis of ); Butcher et al. (2005); Habibi et al. (2007); Pradeep (2005). For related structures, see: Bao & Wei (2008); Odabaşoğlu et al. (2007); Wang et al. (2006); Wei et al. (2008); Yathirajan et al. (2007); Yehye et al. (2008); Zhu et al. (2007).
see: Akitsu & Einaga (2006Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2002); cell SAINT (Bruker, 2002); 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
10.1107/S1600536808041378/ci2740sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808041378/ci2740Isup2.hkl
3,5-Dichloro-2-hydroxybenzaldehyde (1.0 mmol) and 3-bromobenzohydrazide (1.0 mmol) were dissolved in methanol (30 ml). The mixture was stirred at reflux for 10 min to give a clear colourless solution. After keeping this solution in air for 5 d, colourless needle-shaped crystals were formed.
Atom H2 was located in a difference Fourier map and refined isotropically, with the N–H distance restrained to 0.90 (1) Å. All other H atoms were positioned geometrically (C–H = 0.93 Å and O–H = 0.82 Å) and refined as riding, with Uiso(H) values set at 1.2Ueq(C) and 1.5Ueq(O).
Data collection: SMART (Bruker, 2002); cell
SAINT (Bruker, 2002); data reduction: SAINT (Bruker, 2002); 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).C14H9BrCl2N2O2 | F(000) = 768 |
Mr = 388.04 | Dx = 1.743 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 1779 reflections |
a = 8.272 (2) Å | θ = 2.5–24.9° |
b = 22.366 (3) Å | µ = 3.15 mm−1 |
c = 8.237 (2) Å | T = 298 K |
β = 104.014 (2)° | Cut from needle, colorless |
V = 1478.6 (5) Å3 | 0.23 × 0.23 × 0.22 mm |
Z = 4 |
Bruker SMART 1000 CCD area-detector diffractometer | 3224 independent reflections |
Radiation source: fine-focus sealed tube | 2144 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.035 |
ω scans | θmax = 27.0°, θmin = 2.5° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −10→10 |
Tmin = 0.495, Tmax = 0.513 | k = −25→28 |
8590 measured reflections | l = −9→10 |
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)] = 0.036 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.075 | H atoms treated by a mixture of independent and constrained refinement |
S = 0.98 | w = 1/[σ2(Fo2) + (0.0309P)2] where P = (Fo2 + 2Fc2)/3 |
3224 reflections | (Δ/σ)max = 0.001 |
194 parameters | Δρmax = 0.32 e Å−3 |
1 restraint | Δρmin = −0.29 e Å−3 |
C14H9BrCl2N2O2 | V = 1478.6 (5) Å3 |
Mr = 388.04 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 8.272 (2) Å | µ = 3.15 mm−1 |
b = 22.366 (3) Å | T = 298 K |
c = 8.237 (2) Å | 0.23 × 0.23 × 0.22 mm |
β = 104.014 (2)° |
Bruker SMART 1000 CCD area-detector diffractometer | 3224 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2144 reflections with I > 2σ(I) |
Tmin = 0.495, Tmax = 0.513 | Rint = 0.035 |
8590 measured reflections |
R[F2 > 2σ(F2)] = 0.036 | 1 restraint |
wR(F2) = 0.075 | H atoms treated by a mixture of independent and constrained refinement |
S = 0.98 | Δρmax = 0.32 e Å−3 |
3224 reflections | Δρmin = −0.29 e Å−3 |
194 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 | 0.48270 (4) | 0.491887 (13) | −0.27385 (4) | 0.05628 (13) | |
Cl1 | 1.05566 (10) | 1.05415 (3) | 0.26163 (9) | 0.0498 (2) | |
Cl2 | 1.25693 (10) | 0.85535 (3) | 0.61875 (9) | 0.0575 (2) | |
N1 | 0.7849 (3) | 0.79256 (10) | 0.0814 (3) | 0.0410 (6) | |
N2 | 0.6808 (3) | 0.76119 (10) | −0.0450 (3) | 0.0422 (6) | |
O1 | 1.0195 (3) | 0.79478 (8) | 0.3556 (2) | 0.0541 (5) | |
H1 | 0.9462 | 0.7793 | 0.2827 | 0.081* | |
O2 | 0.6767 (3) | 0.68457 (8) | 0.1345 (2) | 0.0489 (5) | |
C1 | 0.9228 (3) | 0.88201 (12) | 0.1849 (3) | 0.0367 (6) | |
C2 | 1.0236 (3) | 0.85387 (12) | 0.3269 (3) | 0.0395 (7) | |
C3 | 1.1329 (3) | 0.88909 (12) | 0.4431 (3) | 0.0397 (7) | |
C4 | 1.1435 (3) | 0.94963 (12) | 0.4228 (3) | 0.0409 (7) | |
H4 | 1.2183 | 0.9722 | 0.5017 | 0.049* | |
C5 | 1.0430 (3) | 0.97700 (11) | 0.2850 (3) | 0.0373 (7) | |
C6 | 0.9340 (3) | 0.94382 (12) | 0.1660 (3) | 0.0387 (7) | |
H6 | 0.8676 | 0.9626 | 0.0726 | 0.046* | |
C7 | 0.8091 (3) | 0.84757 (12) | 0.0558 (3) | 0.0417 (7) | |
H7 | 0.7548 | 0.8656 | −0.0442 | 0.050* | |
C8 | 0.6373 (3) | 0.70501 (12) | −0.0078 (3) | 0.0392 (7) | |
C9 | 0.5343 (3) | 0.67109 (12) | −0.1518 (3) | 0.0373 (6) | |
C10 | 0.5519 (3) | 0.60935 (11) | −0.1486 (3) | 0.0371 (6) | |
H10 | 0.6248 | 0.5906 | −0.0595 | 0.044* | |
C11 | 0.4591 (3) | 0.57631 (12) | −0.2802 (3) | 0.0404 (7) | |
C12 | 0.3488 (4) | 0.60312 (13) | −0.4123 (3) | 0.0468 (7) | |
H12 | 0.2877 | 0.5801 | −0.5000 | 0.056* | |
C13 | 0.3297 (4) | 0.66421 (13) | −0.4133 (4) | 0.0500 (8) | |
H13 | 0.2544 | 0.6826 | −0.5013 | 0.060* | |
C14 | 0.4222 (4) | 0.69829 (13) | −0.2838 (3) | 0.0444 (7) | |
H14 | 0.4093 | 0.7396 | −0.2852 | 0.053* | |
H2 | 0.662 (4) | 0.7733 (13) | −0.1513 (18) | 0.080* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Br1 | 0.0667 (2) | 0.04067 (18) | 0.0550 (2) | −0.00069 (16) | 0.00200 (16) | −0.00918 (15) |
Cl1 | 0.0677 (6) | 0.0367 (4) | 0.0459 (4) | −0.0006 (3) | 0.0154 (4) | 0.0005 (3) |
Cl2 | 0.0656 (6) | 0.0545 (5) | 0.0430 (4) | 0.0122 (4) | −0.0048 (4) | 0.0070 (4) |
N1 | 0.0484 (15) | 0.0403 (14) | 0.0325 (13) | −0.0066 (11) | 0.0066 (11) | −0.0035 (11) |
N2 | 0.0558 (16) | 0.0401 (13) | 0.0280 (12) | −0.0083 (12) | 0.0053 (12) | −0.0038 (11) |
O1 | 0.0718 (17) | 0.0375 (11) | 0.0463 (13) | −0.0037 (10) | 0.0013 (11) | 0.0071 (10) |
O2 | 0.0714 (15) | 0.0428 (11) | 0.0283 (11) | −0.0042 (10) | 0.0042 (10) | −0.0001 (9) |
C1 | 0.0396 (16) | 0.0403 (16) | 0.0311 (14) | −0.0024 (13) | 0.0103 (12) | −0.0019 (13) |
C2 | 0.0462 (18) | 0.0379 (16) | 0.0361 (16) | 0.0023 (13) | 0.0130 (14) | 0.0055 (13) |
C3 | 0.0410 (17) | 0.0448 (17) | 0.0311 (15) | 0.0044 (14) | 0.0047 (13) | 0.0022 (13) |
C4 | 0.0429 (18) | 0.0442 (17) | 0.0335 (15) | −0.0037 (14) | 0.0050 (13) | −0.0038 (13) |
C5 | 0.0457 (19) | 0.0329 (15) | 0.0346 (15) | −0.0011 (12) | 0.0119 (14) | −0.0007 (12) |
C6 | 0.0467 (18) | 0.0403 (16) | 0.0295 (14) | 0.0050 (14) | 0.0100 (13) | 0.0049 (13) |
C7 | 0.0463 (19) | 0.0455 (18) | 0.0324 (15) | −0.0037 (14) | 0.0076 (13) | −0.0004 (13) |
C8 | 0.0462 (18) | 0.0393 (16) | 0.0317 (16) | 0.0023 (13) | 0.0085 (13) | −0.0041 (13) |
C9 | 0.0430 (18) | 0.0408 (16) | 0.0280 (14) | −0.0024 (13) | 0.0085 (13) | −0.0018 (13) |
C10 | 0.0418 (17) | 0.0370 (15) | 0.0302 (15) | 0.0013 (13) | 0.0044 (12) | −0.0003 (12) |
C11 | 0.0399 (18) | 0.0410 (16) | 0.0404 (17) | 0.0012 (13) | 0.0098 (14) | −0.0043 (14) |
C12 | 0.0464 (19) | 0.0520 (19) | 0.0375 (17) | −0.0042 (15) | 0.0016 (14) | −0.0060 (14) |
C13 | 0.0449 (19) | 0.056 (2) | 0.0424 (18) | 0.0007 (15) | −0.0023 (14) | 0.0041 (15) |
C14 | 0.0495 (19) | 0.0385 (16) | 0.0440 (17) | 0.0040 (14) | 0.0094 (15) | 0.0053 (14) |
Br1—C11 | 1.898 (3) | C4—H4 | 0.93 |
Cl1—C5 | 1.742 (3) | C5—C6 | 1.377 (4) |
Cl2—C3 | 1.731 (3) | C6—H6 | 0.93 |
N1—C7 | 1.272 (3) | C7—H7 | 0.93 |
N1—N2 | 1.372 (3) | C8—C9 | 1.490 (4) |
N2—C8 | 1.362 (3) | C9—C14 | 1.387 (4) |
N2—H2 | 0.893 (10) | C9—C10 | 1.388 (3) |
O1—C2 | 1.345 (3) | C10—C11 | 1.381 (4) |
O1—H1 | 0.82 | C10—H10 | 0.93 |
O2—C8 | 1.227 (3) | C11—C12 | 1.377 (4) |
C1—C6 | 1.397 (4) | C12—C13 | 1.375 (4) |
C1—C2 | 1.410 (4) | C12—H12 | 0.93 |
C1—C7 | 1.458 (4) | C13—C14 | 1.381 (4) |
C2—C3 | 1.391 (4) | C13—H13 | 0.93 |
C3—C4 | 1.370 (3) | C14—H14 | 0.93 |
C4—C5 | 1.377 (4) | ||
C7—N1—N2 | 117.7 (2) | N1—C7—H7 | 120.3 |
C8—N2—N1 | 116.9 (2) | C1—C7—H7 | 120.3 |
C8—N2—H2 | 120 (2) | O2—C8—N2 | 122.4 (2) |
N1—N2—H2 | 121 (2) | O2—C8—C9 | 122.6 (2) |
C2—O1—H1 | 109.5 | N2—C8—C9 | 115.0 (2) |
C6—C1—C2 | 119.5 (3) | C14—C9—C10 | 119.9 (3) |
C6—C1—C7 | 119.3 (3) | C14—C9—C8 | 123.1 (2) |
C2—C1—C7 | 121.1 (2) | C10—C9—C8 | 117.0 (2) |
O1—C2—C3 | 118.4 (2) | C11—C10—C9 | 118.8 (3) |
O1—C2—C1 | 123.3 (3) | C11—C10—H10 | 120.6 |
C3—C2—C1 | 118.3 (2) | C9—C10—H10 | 120.6 |
C4—C3—C2 | 121.7 (3) | C12—C11—C10 | 121.6 (3) |
C4—C3—Cl2 | 119.4 (2) | C12—C11—Br1 | 119.9 (2) |
C2—C3—Cl2 | 118.9 (2) | C10—C11—Br1 | 118.5 (2) |
C3—C4—C5 | 119.8 (3) | C13—C12—C11 | 119.4 (3) |
C3—C4—H4 | 120.1 | C13—C12—H12 | 120.3 |
C5—C4—H4 | 120.1 | C11—C12—H12 | 120.3 |
C4—C5—C6 | 120.5 (3) | C12—C13—C14 | 120.2 (3) |
C4—C5—Cl1 | 119.4 (2) | C12—C13—H13 | 119.9 |
C6—C5—Cl1 | 120.1 (2) | C14—C13—H13 | 119.9 |
C5—C6—C1 | 120.2 (3) | C13—C14—C9 | 120.2 (3) |
C5—C6—H6 | 119.9 | C13—C14—H14 | 119.9 |
C1—C6—H6 | 119.9 | C9—C14—H14 | 119.9 |
N1—C7—C1 | 119.4 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N1 | 0.82 | 1.88 | 2.598 (3) | 145 |
N2—H2···O2i | 0.89 (1) | 2.03 (1) | 2.898 (3) | 165 (3) |
Symmetry code: (i) x, −y+3/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | C14H9BrCl2N2O2 |
Mr | 388.04 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 298 |
a, b, c (Å) | 8.272 (2), 22.366 (3), 8.237 (2) |
β (°) | 104.014 (2) |
V (Å3) | 1478.6 (5) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 3.15 |
Crystal size (mm) | 0.23 × 0.23 × 0.22 |
Data collection | |
Diffractometer | Bruker SMART 1000 CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.495, 0.513 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8590, 3224, 2144 |
Rint | 0.035 |
(sin θ/λ)max (Å−1) | 0.639 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.036, 0.075, 0.98 |
No. of reflections | 3224 |
No. of parameters | 194 |
No. of restraints | 1 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.32, −0.29 |
Computer programs: SMART (Bruker, 2002), SAINT (Bruker, 2002), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N1 | 0.82 | 1.88 | 2.598 (3) | 145 |
N2—H2···O2i | 0.89 (1) | 2.03 (1) | 2.898 (3) | 165 (3) |
Symmetry code: (i) x, −y+3/2, z−1/2. |
Acknowledgements
The authors thank the Natural Science Foundation of the Education Office of Anhui Province, China, for financial support (grant No. KJ2007A126ZC).
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.
Schiff bases are readily synthesized by the reaction of aldehydes with primary amines (Akitsu & Einaga, 2006; Pradeep, 2005; Butcher et al., 2005; Habibi et al., 2007). We have reported a few Schiff bases and their complexes (Wei et al., 2008; Zhu et al., 2007; Wang et al., 2006). In this paper, the crystal structure of a new Schiff base compound is reported.
The C═N bond length in the title molecule (Fig.1) is comparable with those observed in other Schiff bases (Yehye et al., 2008; Odabaşoğlu et al., 2007; Yathirajan et al., 2007). All bond lengths are within normal ranges and are comparable to those observed in a related compound (Bao & Wei, 2008). The dihedral angle between C1—C6 and C9—C14 phenyl rings is 13.0 (2)°, indicating that the molecule is non-planar. An intramolecular O1—H1···N1 hydrogen bond is observed.
The crystal structure is stabilized by intermolecular N–H···O hydrogen bonds (Table 1), forming chains along the c axis (Fig. 2).