organic compounds
N′-(3-Ethoxy-2-hydroxybenzylidene)-4-hydroxy-3-methoxybenzohydrazide monohydrate
aSchool of Chemistry and Environmental Science, Shaanxi University of Technology, Hanzhong 723000, People's Republic of China, and bSchool of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
*Correspondence e-mail: jiufulu@163.com
In the title compound, C17H18N2O5·H2O, the dihedral angle between the two aromatic rings is 7.86 (7)° and an intramolecular O—H⋯N hydrogen bond is observed. In the molecules are linked into a three-dimensional network by intermolecular O—H⋯O and N—H⋯O hydrogen bonds.
Related literature
For related structures, see: Lu et al. (2008a,b,c); Abdul Alhadi et al. (2009); Mohd Lair et al. (2009); Narayana 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/S1600536809033236/ci2887sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536809033236/ci2887Isup2.hkl
The title compound was prepared by the Schiff base condensation of 2-hydroxy-3-ethoxybenzaldehyde (0.1 mol) and 4-hydroxy-3-methoxybenzohydrazide (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 obtained 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 distance restraints of 0.90 (1), 0.85 (1) and 1.37 (2) Å, respectively. Other H atoms were positioned geometrically (C-H = 0.93-0.97 Å, O-H = 0.82 Å) and refined using a riding model, with Uiso(H) = 1.2Ueq(C) and 1.5Ueq(Cmethyl and O).
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 a axis. Hydrogen bonds are shown as dashed lines. H atoms not involved in hydrogen bonding have been omitted for clarity. |
C17H18N2O5·H2O | F(000) = 736 |
Mr = 348.35 | Dx = 1.387 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 2358 reflections |
a = 9.4063 (11) Å | θ = 2.3–24.5° |
b = 10.0598 (12) Å | µ = 0.11 mm−1 |
c = 17.667 (2) Å | T = 298 K |
β = 93.702 (2)° | Block, colourless |
V = 1668.3 (3) Å3 | 0.23 × 0.20 × 0.20 mm |
Z = 4 |
Bruker APEXII CCD area-detector diffractometer | 3606 independent reflections |
Radiation source: fine-focus sealed tube | 2530 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.022 |
ω scans | θmax = 27.0°, θmin = 2.3° |
Absorption correction: multi-scan (SADABS; Sheldrick, 2004) | h = −12→6 |
Tmin = 0.976, Tmax = 0.979 | k = −12→12 |
9554 measured reflections | l = −19→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)] = 0.041 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.111 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.05 | w = 1/[σ2(Fo2) + (0.0506P)2 + 0.153P] where P = (Fo2 + 2Fc2)/3 |
3606 reflections | (Δ/σ)max = 0.001 |
239 parameters | Δρmax = 0.14 e Å−3 |
4 restraints | Δρmin = −0.18 e Å−3 |
C17H18N2O5·H2O | V = 1668.3 (3) Å3 |
Mr = 348.35 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 9.4063 (11) Å | µ = 0.11 mm−1 |
b = 10.0598 (12) Å | T = 298 K |
c = 17.667 (2) Å | 0.23 × 0.20 × 0.20 mm |
β = 93.702 (2)° |
Bruker APEXII CCD area-detector diffractometer | 3606 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2004) | 2530 reflections with I > 2σ(I) |
Tmin = 0.976, Tmax = 0.979 | Rint = 0.022 |
9554 measured reflections |
R[F2 > 2σ(F2)] = 0.041 | 4 restraints |
wR(F2) = 0.111 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.05 | Δρmax = 0.14 e Å−3 |
3606 reflections | Δρmin = −0.18 e Å−3 |
239 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 | ||
N1 | 0.10205 (14) | 0.58113 (13) | 0.92228 (7) | 0.0430 (3) | |
N2 | 0.02746 (14) | 0.49793 (13) | 0.87165 (7) | 0.0439 (3) | |
O1 | 0.33352 (11) | 0.69470 (12) | 0.98717 (7) | 0.0540 (3) | |
H1 | 0.2897 | 0.6377 | 0.9621 | 0.081* | |
O2 | 0.44363 (11) | 0.88030 (11) | 1.07376 (6) | 0.0500 (3) | |
O3 | 0.22665 (12) | 0.38467 (12) | 0.84788 (6) | 0.0540 (3) | |
O4 | −0.35636 (11) | 0.22118 (12) | 0.71623 (6) | 0.0519 (3) | |
O5 | −0.21352 (12) | 0.07248 (12) | 0.62606 (6) | 0.0495 (3) | |
H5 | −0.1832 | 0.0803 | 0.5838 | 0.074* | |
O6 | 0.87031 (16) | 0.12628 (18) | 0.49098 (7) | 0.0831 (5) | |
C1 | 0.09270 (16) | 0.76123 (14) | 1.00984 (8) | 0.0386 (4) | |
C2 | 0.23985 (16) | 0.77422 (14) | 1.02122 (8) | 0.0381 (3) | |
C3 | 0.29798 (17) | 0.87517 (15) | 1.06851 (8) | 0.0401 (4) | |
C4 | 0.20833 (19) | 0.95870 (16) | 1.10488 (9) | 0.0461 (4) | |
H4 | 0.2463 | 1.0260 | 1.1361 | 0.055* | |
C5 | 0.06202 (19) | 0.94300 (17) | 1.09513 (9) | 0.0491 (4) | |
H5A | 0.0024 | 0.9986 | 1.1207 | 0.059* | |
C6 | 0.00461 (18) | 0.84627 (16) | 1.04808 (9) | 0.0455 (4) | |
H6 | −0.0938 | 0.8371 | 1.0415 | 0.055* | |
C7 | 0.02778 (17) | 0.66469 (15) | 0.95732 (8) | 0.0432 (4) | |
H7 | −0.0708 | 0.6636 | 0.9489 | 0.052* | |
C8 | 0.09772 (16) | 0.40175 (15) | 0.83586 (8) | 0.0384 (4) | |
C9 | 0.01099 (15) | 0.31662 (14) | 0.78123 (8) | 0.0351 (3) | |
C10 | −0.13784 (16) | 0.31459 (14) | 0.77666 (8) | 0.0365 (3) | |
H10 | −0.1878 | 0.3686 | 0.8084 | 0.044* | |
C11 | −0.21102 (15) | 0.23219 (15) | 0.72488 (8) | 0.0366 (3) | |
C12 | −0.13654 (17) | 0.15245 (14) | 0.67632 (8) | 0.0377 (3) | |
C13 | 0.01011 (17) | 0.15321 (15) | 0.68193 (8) | 0.0420 (4) | |
H13 | 0.0602 | 0.0985 | 0.6506 | 0.050* | |
C14 | 0.08347 (16) | 0.23511 (15) | 0.73412 (8) | 0.0397 (4) | |
H14 | 0.1825 | 0.2351 | 0.7374 | 0.048* | |
C15 | 0.50926 (19) | 0.98456 (17) | 1.11853 (11) | 0.0572 (5) | |
H15A | 0.4796 | 0.9801 | 1.1701 | 0.069* | |
H15B | 0.4817 | 1.0705 | 1.0974 | 0.069* | |
C16 | 0.66733 (19) | 0.9667 (2) | 1.11801 (12) | 0.0642 (5) | |
H16A | 0.6931 | 0.8805 | 1.1379 | 0.096* | |
H16B | 0.7144 | 1.0340 | 1.1489 | 0.096* | |
H16C | 0.6958 | 0.9740 | 1.0670 | 0.096* | |
C17 | −0.44022 (17) | 0.30663 (19) | 0.75946 (10) | 0.0555 (5) | |
H17A | −0.4195 | 0.2898 | 0.8125 | 0.083* | |
H17B | −0.5394 | 0.2902 | 0.7466 | 0.083* | |
H17C | −0.4184 | 0.3975 | 0.7484 | 0.083* | |
H2 | −0.0640 (12) | 0.519 (2) | 0.8616 (11) | 0.080* | |
H6A | 0.8271 (18) | 0.119 (2) | 0.4483 (7) | 0.080* | |
H6B | 0.9512 (13) | 0.161 (2) | 0.4869 (11) | 0.080* |
U11 | U22 | U33 | U12 | U13 | U23 | |
N1 | 0.0430 (8) | 0.0417 (7) | 0.0424 (7) | −0.0028 (6) | −0.0102 (6) | −0.0046 (6) |
N2 | 0.0378 (7) | 0.0425 (7) | 0.0495 (7) | −0.0006 (6) | −0.0130 (6) | −0.0076 (6) |
O1 | 0.0423 (7) | 0.0555 (7) | 0.0638 (8) | 0.0032 (6) | −0.0008 (6) | −0.0259 (6) |
O2 | 0.0426 (7) | 0.0509 (7) | 0.0560 (7) | −0.0028 (5) | −0.0007 (5) | −0.0188 (5) |
O3 | 0.0348 (6) | 0.0661 (8) | 0.0591 (7) | 0.0020 (6) | −0.0115 (5) | −0.0130 (6) |
O4 | 0.0321 (6) | 0.0615 (7) | 0.0616 (7) | −0.0057 (5) | −0.0012 (5) | −0.0146 (6) |
O5 | 0.0477 (7) | 0.0577 (7) | 0.0426 (6) | −0.0144 (6) | 0.0003 (5) | −0.0110 (5) |
O6 | 0.0632 (9) | 0.1350 (14) | 0.0491 (7) | −0.0436 (9) | −0.0107 (7) | 0.0188 (8) |
C1 | 0.0404 (9) | 0.0381 (8) | 0.0367 (8) | 0.0013 (7) | −0.0030 (7) | 0.0019 (6) |
C2 | 0.0421 (9) | 0.0359 (8) | 0.0360 (7) | 0.0038 (7) | 0.0012 (7) | −0.0027 (6) |
C3 | 0.0393 (9) | 0.0415 (8) | 0.0391 (8) | 0.0004 (7) | −0.0014 (7) | −0.0028 (7) |
C4 | 0.0549 (11) | 0.0411 (9) | 0.0420 (8) | 0.0016 (8) | −0.0001 (8) | −0.0104 (7) |
C5 | 0.0500 (10) | 0.0490 (10) | 0.0488 (9) | 0.0113 (8) | 0.0060 (8) | −0.0058 (7) |
C6 | 0.0416 (9) | 0.0481 (9) | 0.0465 (9) | 0.0043 (8) | 0.0008 (7) | 0.0004 (7) |
C7 | 0.0396 (9) | 0.0448 (9) | 0.0442 (9) | 0.0001 (7) | −0.0061 (7) | 0.0000 (7) |
C8 | 0.0367 (9) | 0.0412 (9) | 0.0362 (8) | −0.0015 (7) | −0.0055 (7) | 0.0024 (6) |
C9 | 0.0349 (8) | 0.0366 (8) | 0.0328 (7) | −0.0019 (7) | −0.0047 (6) | 0.0039 (6) |
C10 | 0.0364 (8) | 0.0378 (8) | 0.0350 (7) | 0.0002 (7) | −0.0006 (6) | −0.0010 (6) |
C11 | 0.0302 (8) | 0.0400 (8) | 0.0391 (8) | −0.0041 (7) | −0.0017 (6) | 0.0048 (6) |
C12 | 0.0408 (8) | 0.0382 (8) | 0.0334 (7) | −0.0085 (7) | −0.0024 (6) | 0.0001 (6) |
C13 | 0.0399 (9) | 0.0457 (9) | 0.0407 (8) | −0.0014 (7) | 0.0057 (7) | −0.0030 (7) |
C14 | 0.0314 (8) | 0.0449 (9) | 0.0422 (8) | −0.0019 (7) | −0.0009 (7) | 0.0017 (7) |
C15 | 0.0513 (11) | 0.0513 (10) | 0.0682 (11) | −0.0078 (9) | −0.0016 (9) | −0.0219 (9) |
C16 | 0.0497 (11) | 0.0614 (12) | 0.0804 (13) | −0.0063 (9) | −0.0032 (10) | −0.0139 (10) |
C17 | 0.0362 (9) | 0.0684 (12) | 0.0622 (11) | 0.0030 (9) | 0.0043 (8) | −0.0016 (9) |
N1—C7 | 1.278 (2) | C5—H5A | 0.93 |
N1—N2 | 1.3827 (17) | C6—H6 | 0.93 |
N2—C8 | 1.352 (2) | C7—H7 | 0.93 |
N2—H2 | 0.891 (9) | C8—C9 | 1.493 (2) |
O1—C2 | 1.3589 (18) | C9—C14 | 1.380 (2) |
O1—H1 | 0.82 | C9—C10 | 1.397 (2) |
O2—C3 | 1.3681 (19) | C10—C11 | 1.384 (2) |
O2—C15 | 1.4296 (18) | C10—H10 | 0.93 |
O3—C8 | 1.2297 (18) | C11—C12 | 1.396 (2) |
O4—C11 | 1.3703 (17) | C12—C13 | 1.377 (2) |
O4—C17 | 1.422 (2) | C13—C14 | 1.387 (2) |
O5—C12 | 1.3700 (17) | C13—H13 | 0.93 |
O5—H5 | 0.82 | C14—H14 | 0.93 |
O6—H6A | 0.836 (9) | C15—C16 | 1.498 (2) |
O6—H6B | 0.844 (9) | C15—H15A | 0.97 |
C1—C2 | 1.392 (2) | C15—H15B | 0.97 |
C1—C6 | 1.395 (2) | C16—H16A | 0.96 |
C1—C7 | 1.450 (2) | C16—H16B | 0.96 |
C2—C3 | 1.403 (2) | C16—H16C | 0.96 |
C3—C4 | 1.378 (2) | C17—H17A | 0.96 |
C4—C5 | 1.385 (2) | C17—H17B | 0.96 |
C4—H4 | 0.93 | C17—H17C | 0.96 |
C5—C6 | 1.368 (2) | ||
C7—N1—N2 | 116.17 (13) | C10—C9—C8 | 123.32 (13) |
C8—N2—N1 | 119.54 (13) | C11—C10—C9 | 120.03 (14) |
C8—N2—H2 | 124.6 (13) | C11—C10—H10 | 120.0 |
N1—N2—H2 | 115.6 (13) | C9—C10—H10 | 120.0 |
C2—O1—H1 | 109.5 | O4—C11—C10 | 124.89 (14) |
C3—O2—C15 | 117.38 (12) | O4—C11—C12 | 114.95 (12) |
C11—O4—C17 | 118.38 (12) | C10—C11—C12 | 120.16 (13) |
C12—O5—H5 | 109.5 | O5—C12—C13 | 122.36 (14) |
H6A—O6—H6B | 110.4 (17) | O5—C12—C11 | 118.08 (13) |
C2—C1—C6 | 119.25 (14) | C13—C12—C11 | 119.53 (13) |
C2—C1—C7 | 121.93 (14) | C12—C13—C14 | 120.30 (14) |
C6—C1—C7 | 118.79 (14) | C12—C13—H13 | 119.8 |
O1—C2—C1 | 123.22 (13) | C14—C13—H13 | 119.8 |
O1—C2—C3 | 116.79 (14) | C9—C14—C13 | 120.67 (14) |
C1—C2—C3 | 119.97 (14) | C9—C14—H14 | 119.7 |
O2—C3—C4 | 125.84 (14) | C13—C14—H14 | 119.7 |
O2—C3—C2 | 114.69 (13) | O2—C15—C16 | 107.56 (14) |
C4—C3—C2 | 119.48 (15) | O2—C15—H15A | 110.2 |
C3—C4—C5 | 120.36 (15) | C16—C15—H15A | 110.2 |
C3—C4—H4 | 119.8 | O2—C15—H15B | 110.2 |
C5—C4—H4 | 119.8 | C16—C15—H15B | 110.2 |
C6—C5—C4 | 120.45 (15) | H15A—C15—H15B | 108.5 |
C6—C5—H5A | 119.8 | C15—C16—H16A | 109.5 |
C4—C5—H5A | 119.8 | C15—C16—H16B | 109.5 |
C5—C6—C1 | 120.45 (16) | H16A—C16—H16B | 109.5 |
C5—C6—H6 | 119.8 | C15—C16—H16C | 109.5 |
C1—C6—H6 | 119.8 | H16A—C16—H16C | 109.5 |
N1—C7—C1 | 121.97 (14) | H16B—C16—H16C | 109.5 |
N1—C7—H7 | 119.0 | O4—C17—H17A | 109.5 |
C1—C7—H7 | 119.0 | O4—C17—H17B | 109.5 |
O3—C8—N2 | 121.72 (14) | H17A—C17—H17B | 109.5 |
O3—C8—C9 | 121.55 (14) | O4—C17—H17C | 109.5 |
N2—C8—C9 | 116.73 (13) | H17A—C17—H17C | 109.5 |
C14—C9—C10 | 119.27 (13) | H17B—C17—H17C | 109.5 |
C14—C9—C8 | 117.40 (13) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···N1 | 0.82 | 1.94 | 2.6529 (16) | 144 |
O5—H5···O6i | 0.82 | 1.81 | 2.6177 (17) | 170 |
O6—H6A···O3ii | 0.84 (1) | 1.96 (1) | 2.7908 (17) | 176 (2) |
O6—H6B···O1iii | 0.84 (1) | 2.08 (1) | 2.8714 (18) | 157 (2) |
N2—H2···O4iv | 0.89 (1) | 2.54 (2) | 3.1181 (17) | 123 (2) |
N2—H2···O5iv | 0.89 (1) | 2.19 (1) | 3.0496 (18) | 163 (2) |
Symmetry codes: (i) x−1, y, z; (ii) x+1/2, −y+1/2, z−1/2; (iii) −x+3/2, y−1/2, −z+3/2; (iv) −x−1/2, y+1/2, −z+3/2. |
Experimental details
Crystal data | |
Chemical formula | C17H18N2O5·H2O |
Mr | 348.35 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 298 |
a, b, c (Å) | 9.4063 (11), 10.0598 (12), 17.667 (2) |
β (°) | 93.702 (2) |
V (Å3) | 1668.3 (3) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.11 |
Crystal size (mm) | 0.23 × 0.20 × 0.20 |
Data collection | |
Diffractometer | Bruker APEXII CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2004) |
Tmin, Tmax | 0.976, 0.979 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 9554, 3606, 2530 |
Rint | 0.022 |
(sin θ/λ)max (Å−1) | 0.639 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.041, 0.111, 1.05 |
No. of reflections | 3606 |
No. of parameters | 239 |
No. of restraints | 4 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.14, −0.18 |
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 | 1.94 | 2.6529 (16) | 144 |
O5—H5···O6i | 0.82 | 1.81 | 2.6177 (17) | 170 |
O6—H6A···O3ii | 0.84 (1) | 1.96 (1) | 2.7908 (17) | 176 (2) |
O6—H6B···O1iii | 0.84 (1) | 2.08 (1) | 2.8714 (18) | 157 (2) |
N2—H2···O4iv | 0.89 (1) | 2.54 (2) | 3.1181 (17) | 123 (2) |
N2—H2···O5iv | 0.89 (1) | 2.19 (1) | 3.0496 (18) | 163 (2) |
Symmetry codes: (i) x−1, y, z; (ii) x+1/2, −y+1/2, z−1/2; (iii) −x+3/2, y−1/2, −z+3/2; (iv) −x−1/2, y+1/2, −z+3/2. |
Acknowledgements
The author thanks the Scientific Research Foundation of Shaanxi University of Technology for financial support (project No. SLGQD0708).
References
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Schiff bases and their metal complexes have received much attention in recent years. As part of our investigation on crystal structures of Schiff bases derived from the condensation of aldehydes with benzohydrazides (Lu et al., 2008a,b,c), we report herein 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 (Abdul Alhadi et al., 2009; Mohd Lair et al., 2009; Narayana et al., 2007). The dihedral angle between the two aromatic rings is 7.86 (7)°, indicating that they are approximately coplanar. The methoxy and ethoxy groups are coplanar with the attached rings [C17—O4—C11—C10 = 4.6 (2)°, C15—O2—C3—C4 = -2.6 (2)° and C3—O2—C15—C16 = 177.98 (14)]. An intramolecular O—H···N hydrogen bond is observed (Table 1 and Fig. 1).
In the crystal structure, molecules are linked into a three-dimensional network (Fig. 2) by intermolecular O—H···O and N—H···O hydrogen bonds (Table 1).