organic compounds
4-Hydroxy-N′-(2-hydroxy-3-methoxybenzylidene)benzohydrazide monohydrate
aSchool of Chemistry and Environmental Science, Shaanxi University of Technology, Hanzhong 723000, People's Republic of China
*Correspondence e-mail: jiufulu@163.com
In the title compound, C15H14N2O4·H2O, the dihedral angle between the two aromatic rings is 33.3 (5)°. The methoxy group is twisted slightly away from the attached benzene ring [C—O—C—C = 13.8 (9)°]. An intramolecular O—H⋯N hydrogen bond is observed. In the the molecules are linked into a two-dimensional network parallel to the (010) plane by intermolecular N—H⋯O, O—H⋯O and C—H⋯O hydrogen bonds
Related literature
For related structures, see: Lu et al. (2008a,b,c); Nie (2008); He (2008); Shi et al. (2007). For bond-length data, see: Allen et al. (1987).
Experimental
Crystal data
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Refinement
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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: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supporting information
10.1107/S1600536808030894/ci2678sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808030894/ci2678Isup2.hkl
The title compound was prepared by the Schiff base condensation of 2-hydroxy-3-methoxybenzaldehyde (0.1 mol) and 4-hydroxybenzohydrazide (0.1 mmol) in 95% ethanol (50 ml). The excess ethanol was removed by distillation. The colourless solid obtained was filtered and washed with ethanol. Single crystals suitable for X-ray diffraction were obatined by slow evaporation of a 95% ethanol solution at room temperature.
The imino and water H atoms were located in a difference map and refined with N-H, O-H and H···H distances restrained to 0.90 (1), 0.85 (1), and 1.37 (2) Å, respectively. The other H atoms were positioned geometrically (C-H = 0.93-0.96 Å and O-H = 0.82 Å) and refined using a riding model, with Uiso(H) = 1.2Ueq(C) and 1.5Ueq(Cmethyl and O). A rotating group model was used for methyl and hydroxyl groups. In the absence of significant
effects, Friedel pairs were averaged.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: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).Fig. 1. The molecular structure of the title compound, showing 30% probability displacement ellipsoids and the atom-numbering scheme. The dashed line indicates a hydrogen bond. | |
Fig. 2. The crystal packing of the title compound, viewed along the c axis. H atoms not involved in hydrogen bonding (dashed lines) have been omitted for clarity. |
C15H14N2O4·H2O | F(000) = 320 |
Mr = 304.30 | Dx = 1.379 Mg m−3 |
Monoclinic, Pn | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P -2yac | Cell parameters from 623 reflections |
a = 4.891 (2) Å | θ = 2.3–24.0° |
b = 12.171 (5) Å | µ = 0.11 mm−1 |
c = 12.371 (5) Å | T = 298 K |
β = 95.724 (7)° | Block, colourless |
V = 732.8 (5) Å3 | 0.08 × 0.07 × 0.07 mm |
Z = 2 |
Bruker APEXII CCD area-detector diffractometer | 1582 independent reflections |
Radiation source: fine-focus sealed tube | 791 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.086 |
ω scans | θmax = 27.0°, θmin = 1.7° |
Absorption correction: multi-scan (SADABS; Sheldrick, 2004) | h = −6→6 |
Tmin = 0.992, Tmax = 0.993 | k = −15→15 |
5972 measured reflections | l = −15→15 |
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)] = 0.051 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.119 | H atoms treated by a mixture of independent and constrained refinement |
S = 0.92 | w = 1/[σ2(Fo2) + (0.0473P)2] where P = (Fo2 + 2Fc2)/3 |
1582 reflections | (Δ/σ)max = 0.001 |
211 parameters | Δρmax = 0.14 e Å−3 |
6 restraints | Δρmin = −0.15 e Å−3 |
C15H14N2O4·H2O | V = 732.8 (5) Å3 |
Mr = 304.30 | Z = 2 |
Monoclinic, Pn | Mo Kα radiation |
a = 4.891 (2) Å | µ = 0.11 mm−1 |
b = 12.171 (5) Å | T = 298 K |
c = 12.371 (5) Å | 0.08 × 0.07 × 0.07 mm |
β = 95.724 (7)° |
Bruker APEXII CCD area-detector diffractometer | 1582 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2004) | 791 reflections with I > 2σ(I) |
Tmin = 0.992, Tmax = 0.993 | Rint = 0.086 |
5972 measured reflections |
R[F2 > 2σ(F2)] = 0.051 | 6 restraints |
wR(F2) = 0.119 | H atoms treated by a mixture of independent and constrained refinement |
S = 0.92 | Δρmax = 0.14 e Å−3 |
1582 reflections | Δρmin = −0.15 e Å−3 |
211 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 | ||
O1 | 0.2886 (8) | 0.7446 (3) | 0.9901 (3) | 0.0588 (11) | |
H1 | 0.2167 | 0.8048 | 0.9782 | 0.088* | |
O2 | 0.6029 (9) | 0.5752 (3) | 1.0195 (4) | 0.0747 (13) | |
O3 | −0.1590 (7) | 1.0380 (3) | 0.9939 (3) | 0.0564 (10) | |
O4 | −0.9973 (10) | 1.3626 (4) | 0.7359 (3) | 0.0823 (15) | |
H4 | −1.0197 | 1.3619 | 0.6694 | 0.123* | |
O5 | 0.3665 (9) | 1.0067 (4) | 0.0948 (3) | 0.0717 (13) | |
N1 | 0.1007 (8) | 0.9097 (3) | 0.8590 (3) | 0.0460 (11) | |
N2 | −0.0723 (9) | 0.9954 (4) | 0.8239 (3) | 0.0454 (11) | |
C1 | 0.4174 (11) | 0.7745 (4) | 0.8075 (5) | 0.0494 (14) | |
C2 | 0.4327 (11) | 0.7168 (4) | 0.9064 (5) | 0.0463 (14) | |
C3 | 0.6063 (12) | 0.6245 (5) | 0.9194 (5) | 0.0579 (17) | |
C4 | 0.7584 (13) | 0.5927 (5) | 0.8385 (6) | 0.072 (2) | |
H4A | 0.8732 | 0.5319 | 0.8484 | 0.087* | |
C5 | 0.7435 (13) | 0.6500 (6) | 0.7418 (6) | 0.073 (2) | |
H5 | 0.8484 | 0.6279 | 0.6870 | 0.088* | |
C6 | 0.5746 (12) | 0.7393 (5) | 0.7267 (5) | 0.0594 (16) | |
H6 | 0.5647 | 0.7771 | 0.6611 | 0.071* | |
C7 | 0.2392 (11) | 0.8680 (4) | 0.7868 (4) | 0.0485 (14) | |
H7 | 0.2243 | 0.8993 | 0.7180 | 0.058* | |
C8 | −0.2022 (10) | 1.0526 (4) | 0.8945 (5) | 0.0421 (13) | |
C9 | −0.4033 (10) | 1.1358 (4) | 0.8497 (4) | 0.0410 (13) | |
C10 | −0.5053 (12) | 1.2129 (5) | 0.9167 (5) | 0.0589 (16) | |
H10 | −0.4389 | 1.2138 | 0.9898 | 0.071* | |
C11 | −0.6996 (13) | 1.2877 (5) | 0.8800 (5) | 0.0694 (19) | |
H11 | −0.7650 | 1.3381 | 0.9277 | 0.083* | |
C12 | −0.7996 (11) | 1.2885 (5) | 0.7710 (5) | 0.0558 (16) | |
C13 | −0.7035 (13) | 1.2128 (5) | 0.7021 (5) | 0.0655 (18) | |
H13 | −0.7698 | 1.2125 | 0.6289 | 0.079* | |
C14 | −0.5079 (11) | 1.1370 (5) | 0.7412 (4) | 0.0549 (16) | |
H14 | −0.4450 | 1.0857 | 0.6938 | 0.066* | |
C15 | 0.8230 (15) | 0.4970 (7) | 1.0500 (8) | 0.107 (3) | |
H15A | 0.7983 | 0.4329 | 1.0048 | 0.160* | |
H15B | 0.8185 | 0.4763 | 1.1246 | 0.160* | |
H15C | 0.9970 | 0.5302 | 1.0405 | 0.160* | |
H2 | −0.076 (13) | 1.017 (5) | 0.7543 (17) | 0.080* | |
H5A | 0.211 (5) | 0.997 (5) | 0.058 (4) | 0.080* | |
H5B | 0.490 (7) | 0.992 (5) | 0.054 (4) | 0.080* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.063 (3) | 0.055 (2) | 0.057 (2) | 0.014 (2) | 0.001 (2) | 0.002 (2) |
O2 | 0.071 (3) | 0.059 (2) | 0.090 (3) | 0.024 (2) | −0.013 (3) | 0.007 (2) |
O3 | 0.056 (3) | 0.081 (3) | 0.032 (2) | 0.017 (2) | 0.0050 (18) | 0.007 (2) |
O4 | 0.090 (4) | 0.068 (3) | 0.086 (3) | 0.044 (3) | −0.002 (3) | −0.005 (2) |
O5 | 0.054 (3) | 0.122 (4) | 0.038 (2) | −0.011 (3) | 0.003 (2) | 0.005 (2) |
N1 | 0.042 (3) | 0.043 (3) | 0.051 (3) | 0.004 (2) | −0.004 (2) | −0.003 (2) |
N2 | 0.048 (3) | 0.050 (3) | 0.039 (3) | 0.009 (2) | 0.007 (2) | 0.002 (2) |
C1 | 0.043 (3) | 0.046 (3) | 0.057 (4) | 0.004 (3) | −0.004 (3) | −0.022 (3) |
C2 | 0.041 (4) | 0.046 (3) | 0.050 (3) | 0.001 (3) | −0.001 (3) | −0.014 (3) |
C3 | 0.047 (4) | 0.047 (3) | 0.076 (5) | 0.010 (3) | −0.012 (4) | −0.010 (3) |
C4 | 0.056 (5) | 0.063 (4) | 0.097 (6) | 0.025 (4) | −0.001 (4) | −0.027 (4) |
C5 | 0.052 (4) | 0.076 (5) | 0.091 (6) | 0.011 (4) | 0.011 (4) | −0.035 (4) |
C6 | 0.048 (3) | 0.065 (4) | 0.064 (4) | 0.001 (3) | 0.000 (3) | −0.017 (3) |
C7 | 0.050 (4) | 0.055 (4) | 0.041 (3) | 0.003 (3) | 0.001 (3) | −0.009 (3) |
C8 | 0.034 (3) | 0.042 (3) | 0.051 (4) | −0.001 (3) | 0.003 (3) | −0.005 (3) |
C9 | 0.041 (3) | 0.040 (3) | 0.042 (3) | 0.003 (3) | 0.002 (3) | −0.002 (2) |
C10 | 0.065 (4) | 0.068 (4) | 0.043 (3) | 0.009 (4) | −0.001 (3) | −0.007 (3) |
C11 | 0.078 (5) | 0.070 (4) | 0.059 (5) | 0.037 (4) | 0.008 (4) | −0.014 (3) |
C12 | 0.052 (4) | 0.049 (3) | 0.064 (4) | 0.017 (3) | −0.004 (3) | −0.001 (3) |
C13 | 0.076 (5) | 0.072 (4) | 0.047 (4) | 0.023 (4) | −0.003 (3) | 0.004 (3) |
C14 | 0.057 (4) | 0.063 (4) | 0.044 (3) | 0.025 (3) | 0.001 (3) | −0.007 (3) |
C15 | 0.066 (5) | 0.088 (5) | 0.160 (8) | 0.039 (4) | −0.015 (5) | 0.028 (5) |
O1—C2 | 1.352 (6) | C4—H4A | 0.93 |
O1—H1 | 0.82 | C5—C6 | 1.367 (8) |
O2—C3 | 1.377 (7) | C5—H5 | 0.93 |
O2—C15 | 1.459 (7) | C6—H6 | 0.93 |
O3—C8 | 1.240 (6) | C7—H7 | 0.93 |
O4—C12 | 1.361 (6) | C8—C9 | 1.480 (7) |
O4—H4 | 0.82 | C9—C10 | 1.378 (7) |
O5—H5A | 0.86 (3) | C9—C14 | 1.388 (6) |
O5—H5B | 0.84 (4) | C10—C11 | 1.361 (7) |
N1—C7 | 1.279 (6) | C10—H10 | 0.93 |
N1—N2 | 1.385 (6) | C11—C12 | 1.388 (8) |
N2—C8 | 1.328 (6) | C11—H11 | 0.93 |
N2—H2 | 0.90 (3) | C12—C13 | 1.369 (7) |
C1—C6 | 1.388 (7) | C13—C14 | 1.381 (7) |
C1—C2 | 1.407 (7) | C13—H13 | 0.93 |
C1—C7 | 1.440 (7) | C14—H14 | 0.93 |
C2—C3 | 1.407 (7) | C15—H15A | 0.96 |
C3—C4 | 1.362 (8) | C15—H15B | 0.96 |
C4—C5 | 1.379 (8) | C15—H15C | 0.96 |
C2—O1—H1 | 109.5 | C1—C7—H7 | 118.5 |
C3—O2—C15 | 116.3 (5) | O3—C8—N2 | 122.1 (5) |
C12—O4—H4 | 109.5 | O3—C8—C9 | 120.7 (5) |
H5A—O5—H5B | 108 (3) | N2—C8—C9 | 117.1 (5) |
C7—N1—N2 | 115.5 (4) | C10—C9—C14 | 117.0 (5) |
C8—N2—N1 | 120.4 (4) | C10—C9—C8 | 120.5 (5) |
C8—N2—H2 | 121 (4) | C14—C9—C8 | 122.5 (5) |
N1—N2—H2 | 118 (4) | C11—C10—C9 | 122.5 (5) |
C6—C1—C2 | 119.2 (5) | C11—C10—H10 | 118.8 |
C6—C1—C7 | 119.0 (6) | C9—C10—H10 | 118.8 |
C2—C1—C7 | 121.8 (5) | C10—C11—C12 | 119.7 (5) |
O1—C2—C3 | 117.8 (5) | C10—C11—H11 | 120.2 |
O1—C2—C1 | 123.7 (5) | C12—C11—H11 | 120.2 |
C3—C2—C1 | 118.5 (5) | O4—C12—C13 | 121.6 (5) |
C4—C3—O2 | 126.4 (6) | O4—C12—C11 | 119.0 (5) |
C4—C3—C2 | 120.7 (6) | C13—C12—C11 | 119.4 (5) |
O2—C3—C2 | 112.9 (5) | C12—C13—C14 | 120.0 (6) |
C3—C4—C5 | 120.5 (6) | C12—C13—H13 | 120.0 |
C3—C4—H4A | 119.7 | C14—C13—H13 | 120.0 |
C5—C4—H4A | 119.7 | C13—C14—C9 | 121.5 (5) |
C6—C5—C4 | 120.0 (6) | C13—C14—H14 | 119.3 |
C6—C5—H5 | 120.0 | C9—C14—H14 | 119.3 |
C4—C5—H5 | 120.0 | O2—C15—H15A | 109.5 |
C5—C6—C1 | 121.1 (6) | O2—C15—H15B | 109.5 |
C5—C6—H6 | 119.4 | H15A—C15—H15B | 109.5 |
C1—C6—H6 | 119.4 | O2—C15—H15C | 109.5 |
N1—C7—C1 | 122.9 (5) | H15A—C15—H15C | 109.5 |
N1—C7—H7 | 118.5 | H15B—C15—H15C | 109.5 |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N1 | 0.82 | 1.99 | 2.687 (5) | 142 |
N2—H2···O5i | 0.90 (3) | 1.99 (3) | 2.820 (5) | 154 (5) |
O4—H4···O2ii | 0.82 | 2.15 | 2.872 (7) | 147 |
O5—H5A···O3iii | 0.86 (3) | 1.97 (3) | 2.769 (6) | 156 (6) |
O5—H5B···O3iv | 0.84 (4) | 2.01 (3) | 2.769 (6) | 148 (5) |
C7—H7···O5i | 0.93 | 2.48 | 3.229 (7) | 138 |
C14—H14···O5i | 0.93 | 2.34 | 3.218 (7) | 158 |
Symmetry codes: (i) x−1/2, −y+2, z+1/2; (ii) x−3/2, −y+2, z−1/2; (iii) x, y, z−1; (iv) x+1, y, z−1. |
Experimental details
Crystal data | |
Chemical formula | C15H14N2O4·H2O |
Mr | 304.30 |
Crystal system, space group | Monoclinic, Pn |
Temperature (K) | 298 |
a, b, c (Å) | 4.891 (2), 12.171 (5), 12.371 (5) |
β (°) | 95.724 (7) |
V (Å3) | 732.8 (5) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.11 |
Crystal size (mm) | 0.08 × 0.07 × 0.07 |
Data collection | |
Diffractometer | Bruker APEXII CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2004) |
Tmin, Tmax | 0.992, 0.993 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5972, 1582, 791 |
Rint | 0.086 |
(sin θ/λ)max (Å−1) | 0.639 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.051, 0.119, 0.92 |
No. of reflections | 1582 |
No. of parameters | 211 |
No. of restraints | 6 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.14, −0.15 |
Computer programs: APEX2 (Bruker, 2004), SAINT (Bruker, 2004), 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 | 1.99 | 2.687 (5) | 142 |
N2—H2···O5i | 0.90 (3) | 1.99 (3) | 2.820 (5) | 154 (5) |
O4—H4···O2ii | 0.82 | 2.15 | 2.872 (7) | 147 |
O5—H5A···O3iii | 0.86 (3) | 1.97 (3) | 2.769 (6) | 156 (6) |
O5—H5B···O3iv | 0.84 (4) | 2.01 (3) | 2.769 (6) | 148 (5) |
C7—H7···O5i | 0.93 | 2.48 | 3.229 (7) | 138 |
C14—H14···O5i | 0.93 | 2.34 | 3.218 (7) | 158 |
Symmetry codes: (i) x−1/2, −y+2, z+1/2; (ii) x−3/2, −y+2, z−1/2; (iii) x, y, z−1; (iv) x+1, y, z−1. |
Acknowledgements
The author thanks the Scientific Research Foundation of Shaanxi University of Technology for financial support (project No. SLGQD0708).
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.
As part of our investigation of the crystal structures of Schiff bases derived from the condensation of aldehydes with benzohydrazides (Lu et al., 2008a,b,c), we report here the crystal structure of the title new Schiff base compound.
The asymmetric unit of the title compound (Fig. 1), consists of a Schiff base molecule and a water molecule of crystallization. The bond lengths have normal values (Allen et al., 1987), and are comparable to those observed in similar compounds (Nie, 2008; He, 2008; Shi et al., 2007). The dihedral angle between the two aromatic rings is 33.3 (5)°, indicating that the Schiff base molecule is twisted. An intramolecular O—H···N hydrogen bond is observed.
In the crystal structure, the molecules are linked into a two-dimensional network parallel to the (010) by intermolecular N—H···O, O—H···O and C—H···O hydrogen bonds (Table 1).