organic compounds
(E)-N′-(5-Bromo-2-hydroxybenzylidene)-2-methoxybenzohydrazide
aCollege of Chemistry & Pharmacy, Taizhou University, Taizhou Zhejiang 317000, People's Republic of China, and bDepartment of Chemistry, Liaoning Normal University, Dalian 116029, People's Republic of China
*Correspondence e-mail: liushiyong2010@yahoo.cn
In the title compound, C15H13BrN2O3, the molecule adopts an E configuration about the C=N bond and the two benzene rings form a dihedral angle of 20.3 (3)°. In the molecule, there are two intramolecular hydrogen bonds, viz. O—H⋯N and N—H⋯O, involving the hydroxy substituent, the methoxy O atom and the hydrazide NH group and N atom. In the molecules are linked through N—H⋯O hydrogen bonds, forming chains propagating along [010].
Related literature
For background to et al. (2010); Zhu et al. (2009); Jimenez-Pulido et al. (2008); Raj et al. (2007); Zhong et al. (2007). For the crystal structures of see: Khaledi et al. (2009); Warad et al. (2009); Back et al. (2009); Vijayakumar et al. (2009). For similar compounds, see: Cao (2009); Xu et al. (2009); Shafiq et al. (2009).
and their medicinal applications, see: HillmerExperimental
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
10.1107/S1600536810022002/su2186sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536810022002/su2186Isup2.hkl
The title compound was prepared by the condensation reaction of 5-bromosalicylaldehyde (0.05 mol, 10 g) and 2-methoxybenzohydrazide (0.05 mol, 8.3 g) in anhydrous methanol (200 mL) at RT. Colourless block-shaped single crystals, suitable for X-ray structure analysis, were obtained by slow evaporation of the solution over a period of a week.
H-atom H2, attached to N2, was located from a difference Fourier map and refined with a distance restraint of N-H = 0.90 (1) Å. The other H-atoms were placed in idealized positions and constrained to ride on their parent atoms: C-H = 0.93 - 0.96 Å, O-H = 0.82 Å, with Uiso(H) = k × Ueq(parent C-, O-atom), where k = 1.5 for H-hydroxyl and H-methyl, and = 1.2 for all other H-atoms.
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).C15H13BrN2O3 | Dx = 1.598 Mg m−3 |
Mr = 349.18 | Mo Kα radiation, λ = 0.71073 Å |
Orthorhombic, Pbca | Cell parameters from 1832 reflections |
a = 15.587 (3) Å | θ = 2.5–24.0° |
b = 9.1281 (19) Å | µ = 2.84 mm−1 |
c = 20.399 (4) Å | T = 298 K |
V = 2902.3 (10) Å3 | Block, colourless |
Z = 8 | 0.23 × 0.20 × 0.20 mm |
F(000) = 1408 |
Bruker SMART CCD area-detector diffractometer | 3154 independent reflections |
Radiation source: fine-focus sealed tube | 1496 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.074 |
ω scans | θmax = 27.0°, θmin = 2.0° |
Absorption correction: multi-scan (SADABS; Bruker, 2001) | h = −19→18 |
Tmin = 0.561, Tmax = 0.600 | k = −11→11 |
16311 measured reflections | l = −26→23 |
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)] = 0.043 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.127 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.00 | w = 1/[σ2(Fo2) + (0.0528P)2 + 0.6195P] where P = (Fo2 + 2Fc2)/3 |
3154 reflections | (Δ/σ)max = 0.001 |
195 parameters | Δρmax = 0.64 e Å−3 |
1 restraint | Δρmin = −0.78 e Å−3 |
C15H13BrN2O3 | V = 2902.3 (10) Å3 |
Mr = 349.18 | Z = 8 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 15.587 (3) Å | µ = 2.84 mm−1 |
b = 9.1281 (19) Å | T = 298 K |
c = 20.399 (4) Å | 0.23 × 0.20 × 0.20 mm |
Bruker SMART CCD area-detector diffractometer | 3154 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2001) | 1496 reflections with I > 2σ(I) |
Tmin = 0.561, Tmax = 0.600 | Rint = 0.074 |
16311 measured reflections |
R[F2 > 2σ(F2)] = 0.043 | 1 restraint |
wR(F2) = 0.127 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.00 | Δρmax = 0.64 e Å−3 |
3154 reflections | Δρmin = −0.78 e Å−3 |
195 parameters |
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds 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 > 2sigma(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 | 1.23601 (3) | 0.49891 (6) | 0.43968 (3) | 0.0855 (2) | |
N1 | 0.8301 (2) | 0.4179 (3) | 0.38746 (13) | 0.0464 (7) | |
N2 | 0.76415 (19) | 0.4977 (3) | 0.35837 (15) | 0.0484 (7) | |
O1 | 0.89179 (19) | 0.2082 (3) | 0.46358 (15) | 0.0674 (8) | |
H1 | 0.8543 | 0.2542 | 0.4443 | 0.101* | |
O2 | 0.67329 (16) | 0.3058 (3) | 0.36404 (13) | 0.0598 (7) | |
O3 | 0.71532 (17) | 0.6580 (3) | 0.25197 (13) | 0.0629 (8) | |
C1 | 0.9761 (2) | 0.4067 (4) | 0.42007 (16) | 0.0425 (9) | |
C2 | 0.9676 (3) | 0.2766 (4) | 0.45609 (18) | 0.0524 (10) | |
C3 | 1.0386 (3) | 0.2181 (4) | 0.4871 (2) | 0.0659 (12) | |
H3 | 1.0329 | 0.1328 | 0.5117 | 0.079* | |
C4 | 1.1175 (3) | 0.2842 (5) | 0.4823 (2) | 0.0662 (12) | |
H4 | 1.1644 | 0.2444 | 0.5041 | 0.079* | |
C5 | 1.1271 (2) | 0.4091 (5) | 0.44529 (18) | 0.0547 (10) | |
C6 | 1.0566 (2) | 0.4699 (4) | 0.41518 (18) | 0.0504 (10) | |
H6 | 1.0632 | 0.5554 | 0.3910 | 0.061* | |
C7 | 0.9037 (2) | 0.4779 (4) | 0.38856 (17) | 0.0443 (9) | |
H7 | 0.9113 | 0.5689 | 0.3689 | 0.053* | |
C8 | 0.6876 (2) | 0.4335 (4) | 0.34843 (16) | 0.0436 (9) | |
C9 | 0.6191 (2) | 0.5270 (4) | 0.31930 (18) | 0.0446 (9) | |
C10 | 0.6332 (3) | 0.6357 (4) | 0.27206 (18) | 0.0498 (9) | |
C11 | 0.5635 (3) | 0.7133 (4) | 0.2475 (2) | 0.0636 (11) | |
H11 | 0.5723 | 0.7844 | 0.2155 | 0.076* | |
C12 | 0.4824 (3) | 0.6865 (5) | 0.2696 (2) | 0.0698 (12) | |
H12 | 0.4368 | 0.7406 | 0.2530 | 0.084* | |
C13 | 0.4671 (3) | 0.5804 (5) | 0.3162 (2) | 0.0674 (12) | |
H13 | 0.4117 | 0.5624 | 0.3311 | 0.081* | |
C14 | 0.5358 (3) | 0.5011 (4) | 0.34027 (18) | 0.0557 (10) | |
H14 | 0.5259 | 0.4285 | 0.3714 | 0.067* | |
C15 | 0.7306 (3) | 0.7746 (5) | 0.2062 (2) | 0.0778 (14) | |
H15A | 0.7006 | 0.7548 | 0.1661 | 0.117* | |
H15B | 0.7910 | 0.7816 | 0.1975 | 0.117* | |
H15C | 0.7106 | 0.8653 | 0.2244 | 0.117* | |
H2 | 0.777 (3) | 0.5907 (17) | 0.3488 (19) | 0.080* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Br1 | 0.0504 (3) | 0.1095 (5) | 0.0967 (4) | 0.0050 (3) | −0.0067 (2) | −0.0282 (3) |
N1 | 0.051 (2) | 0.0402 (18) | 0.0483 (18) | 0.0045 (16) | −0.0080 (15) | 0.0006 (14) |
N2 | 0.0499 (18) | 0.0346 (17) | 0.0607 (19) | −0.0031 (17) | −0.0110 (15) | 0.0081 (17) |
O1 | 0.077 (2) | 0.0522 (18) | 0.073 (2) | 0.0002 (16) | 0.0031 (16) | 0.0167 (15) |
O2 | 0.0614 (17) | 0.0400 (16) | 0.0781 (19) | −0.0060 (13) | −0.0051 (14) | 0.0116 (14) |
O3 | 0.0557 (18) | 0.0630 (18) | 0.0700 (18) | 0.0012 (14) | −0.0027 (14) | 0.0282 (15) |
C1 | 0.048 (2) | 0.039 (2) | 0.040 (2) | 0.0074 (18) | −0.0037 (17) | −0.0015 (17) |
C2 | 0.066 (3) | 0.047 (3) | 0.045 (2) | 0.006 (2) | 0.000 (2) | −0.0005 (19) |
C3 | 0.090 (3) | 0.050 (3) | 0.057 (3) | 0.019 (3) | −0.010 (2) | 0.007 (2) |
C4 | 0.070 (3) | 0.073 (3) | 0.056 (3) | 0.030 (3) | −0.017 (2) | −0.015 (2) |
C5 | 0.048 (2) | 0.064 (3) | 0.052 (2) | 0.011 (2) | −0.0031 (19) | −0.013 (2) |
C6 | 0.053 (3) | 0.047 (2) | 0.051 (2) | 0.0085 (19) | −0.0009 (18) | −0.0040 (19) |
C7 | 0.053 (2) | 0.035 (2) | 0.045 (2) | 0.0053 (18) | −0.0015 (17) | 0.0026 (17) |
C8 | 0.052 (3) | 0.036 (2) | 0.043 (2) | −0.0034 (18) | −0.0039 (17) | −0.0031 (18) |
C9 | 0.045 (2) | 0.038 (2) | 0.051 (2) | −0.0002 (17) | −0.0100 (17) | −0.0037 (18) |
C10 | 0.056 (3) | 0.041 (2) | 0.053 (2) | 0.0036 (19) | −0.010 (2) | −0.001 (2) |
C11 | 0.064 (3) | 0.057 (3) | 0.070 (3) | 0.006 (2) | −0.012 (2) | 0.010 (2) |
C12 | 0.060 (3) | 0.063 (3) | 0.086 (3) | 0.015 (2) | −0.016 (2) | −0.003 (3) |
C13 | 0.046 (3) | 0.073 (3) | 0.083 (3) | 0.005 (2) | −0.010 (2) | −0.016 (3) |
C14 | 0.056 (3) | 0.055 (3) | 0.057 (2) | −0.006 (2) | −0.0048 (18) | −0.002 (2) |
C15 | 0.079 (3) | 0.077 (3) | 0.077 (3) | −0.009 (2) | −0.006 (2) | 0.029 (2) |
Br1—C5 | 1.888 (4) | C5—C6 | 1.376 (5) |
N1—C7 | 1.271 (4) | C6—H6 | 0.9300 |
N1—N2 | 1.393 (4) | C7—H7 | 0.9300 |
N2—C8 | 1.344 (4) | C8—C9 | 1.491 (5) |
N2—H2 | 0.892 (10) | C9—C14 | 1.388 (5) |
O1—C2 | 1.345 (5) | C9—C10 | 1.401 (5) |
O1—H1 | 0.8200 | C10—C11 | 1.390 (5) |
O2—C8 | 1.229 (4) | C11—C12 | 1.364 (6) |
O3—C10 | 1.359 (4) | C11—H11 | 0.9300 |
O3—C15 | 1.436 (4) | C12—C13 | 1.377 (6) |
C1—C6 | 1.386 (5) | C12—H12 | 0.9300 |
C1—C2 | 1.403 (5) | C13—C14 | 1.382 (5) |
C1—C7 | 1.451 (5) | C13—H13 | 0.9300 |
C2—C3 | 1.383 (5) | C14—H14 | 0.9300 |
C3—C4 | 1.372 (6) | C15—H15A | 0.9600 |
C3—H3 | 0.9300 | C15—H15B | 0.9600 |
C4—C5 | 1.375 (5) | C15—H15C | 0.9600 |
C4—H4 | 0.9300 | ||
C7—N1—N2 | 116.7 (3) | O2—C8—N2 | 122.4 (3) |
C8—N2—N1 | 119.4 (3) | O2—C8—C9 | 121.1 (3) |
C8—N2—H2 | 125 (3) | N2—C8—C9 | 116.5 (3) |
N1—N2—H2 | 115 (3) | C14—C9—C10 | 118.7 (3) |
C2—O1—H1 | 109.5 | C14—C9—C8 | 116.7 (3) |
C10—O3—C15 | 117.6 (3) | C10—C9—C8 | 124.6 (3) |
C6—C1—C2 | 118.4 (3) | O3—C10—C11 | 123.4 (4) |
C6—C1—C7 | 119.1 (3) | O3—C10—C9 | 117.5 (3) |
C2—C1—C7 | 122.6 (4) | C11—C10—C9 | 119.1 (4) |
O1—C2—C3 | 118.2 (4) | C12—C11—C10 | 120.9 (4) |
O1—C2—C1 | 122.3 (4) | C12—C11—H11 | 119.5 |
C3—C2—C1 | 119.5 (4) | C10—C11—H11 | 119.5 |
C4—C3—C2 | 120.9 (4) | C11—C12—C13 | 120.9 (4) |
C4—C3—H3 | 119.5 | C11—C12—H12 | 119.5 |
C2—C3—H3 | 119.5 | C13—C12—H12 | 119.5 |
C3—C4—C5 | 120.1 (4) | C12—C13—C14 | 118.7 (4) |
C3—C4—H4 | 119.9 | C12—C13—H13 | 120.7 |
C5—C4—H4 | 119.9 | C14—C13—H13 | 120.7 |
C4—C5—C6 | 119.5 (4) | C13—C14—C9 | 121.7 (4) |
C4—C5—Br1 | 119.5 (3) | C13—C14—H14 | 119.2 |
C6—C5—Br1 | 121.0 (3) | C9—C14—H14 | 119.2 |
C5—C6—C1 | 121.6 (4) | O3—C15—H15A | 109.5 |
C5—C6—H6 | 119.2 | O3—C15—H15B | 109.5 |
C1—C6—H6 | 119.2 | H15A—C15—H15B | 109.5 |
N1—C7—C1 | 121.1 (3) | O3—C15—H15C | 109.5 |
N1—C7—H7 | 119.5 | H15A—C15—H15C | 109.5 |
C1—C7—H7 | 119.5 | H15B—C15—H15C | 109.5 |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2···O2i | 0.89 (1) | 2.14 (2) | 2.978 (4) | 157 (4) |
N2—H2···O3 | 0.89 (1) | 2.28 (4) | 2.726 (4) | 111 (3) |
O1—H1···N1 | 0.82 | 1.93 | 2.646 (4) | 146 |
Symmetry code: (i) −x+3/2, y+1/2, z. |
Experimental details
Crystal data | |
Chemical formula | C15H13BrN2O3 |
Mr | 349.18 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 298 |
a, b, c (Å) | 15.587 (3), 9.1281 (19), 20.399 (4) |
V (Å3) | 2902.3 (10) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 2.84 |
Crystal size (mm) | 0.23 × 0.20 × 0.20 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2001) |
Tmin, Tmax | 0.561, 0.600 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 16311, 3154, 1496 |
Rint | 0.074 |
(sin θ/λ)max (Å−1) | 0.639 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.043, 0.127, 1.00 |
No. of reflections | 3154 |
No. of parameters | 195 |
No. of restraints | 1 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.64, −0.78 |
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 |
N2—H2···O2i | 0.892 (10) | 2.136 (18) | 2.978 (4) | 157 (4) |
N2—H2···O3 | 0.892 (10) | 2.28 (4) | 2.726 (4) | 111 (3) |
O1—H1···N1 | 0.82 | 1.93 | 2.646 (4) | 145.5 |
Symmetry code: (i) −x+3/2, y+1/2, z. |
Acknowledgements
We acknowledge Taizhou University for financial support.
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.
Considerable attention has been focused on hydrazones and their medicinal applications (Hillmer et al., 2010; Zhu et al., 2009; Jimenez-Pulido et al., 2008; Raj et al., 2007; Zhong et al., 2007). The study of the crystal structures of such compounds is of particular interest (Khaledi et al., 2009; Warad et al., 2009; Back et al., 2009; Vijayakumar et al., 2009), and herein we report on the crystal structure of the new title hydrazone.
In the title molecule, illustrated in Fig. 1, the dihedral angle between the two benzene rings is 20.3 (3)°, indicating that the molecule is somewhat twisted. Atom C15 deviates from the plane of the benzene ring (C9-C14) by 0.075 (2) Å. All the bond lengths are comparable to those in similar compounds (Cao, 2009; Xu et al., 2009; Shafiq et al., 2009). In the molecule there are two intramolecular hydrogen bonds; O-H···N involving the hydroxyl group and the adjacent N hydrazide atom, and N-H···O involving the NH group and the adjacent O-atom of the methyl group (Table 1). The molecule has the E configuration about the C═N bond.
In the crystal structure, molecules are linked through N—H···O hydrogen bonds, to form chains running parallel to the b axis (Fig. 2, and Table 1).