organic compounds
(E)-N′-(2,5-Dimethoxybenzylidene)-3,4-dihydroxybenzohydrazide monohydrate
aDepartment of Nutrition, Jilin Medical College, Jilin 132013, People's Republic of China, bLiao Ning Benxi Third Pharmaceuticals Co Ltd, Benxi 117004, People's Republic of China, and cCollege of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
*Correspondence e-mail: jlbinxu@163.com
In the title compound, C16H16N2O5·H2O, the dihedral angle between the two benzene rings is 25.9 (1)°. Intramolecular O—H⋯O and N—H⋯O hydrogen bonds are observed. In the crystal, the components are linked into a three-dimensional network by O—H⋯O and O—H⋯(O,O) hydrogen bonds.
Related literature
For related structures, see: Pu (2008); Wang et al. (2009). For reference structural data, see: Allen et al. (1987).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Siemens, 1996); cell SAINT (Siemens, 1996); 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
https://doi.org/10.1107/S1600536809039300/hb5111sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536809039300/hb5111Isup2.hkl
2,5-Dimethoxybenzaldehyde (0.1 mmol, 16.6 mg) and 3,4-dihydroxybenzohydrazide (0.1 mmol, 16.9 mg) were dissolved in a 95% ethanol solution (10 ml). The mixture was stirred at room temperature to give a clear colorless solution. Light yellow blocks of (I) were formed by gradual evaporation of the solvent over a period of six days at room temperature.
All H atoms were placed in geometrically idealized positions (C—H = 0.93–0.96 Å, O—H = 0.82–0.85 Å and N—H = 0.86 Å) and refined as riding with Uiso(H) = 1.2Ueq(C,N) or 1.5Ueq(O).
Schiff base compounds have been of great interest for many years. These compounds play an important role in the development of coordination chemistry related to catalysis and enzymatic reactions, magnetism and molecular architectures (Pu, 2008). As a part of our on going investigation in this field we have determined the
of the title compound, (I).The Schiff base molecule of the compound displays a trans configuration with respect to the C=N and C—N bonds(Fig. 1). All the bond lengths are within normal ranges (Allen et al., 1987), and are comparable to other Schiff base compounds containing 2,5-dimethoxybenzaldehyde (Wang et al., 2009). The dihedral angle between the two benzene rings is 25.9 (1)°. Intramolecular O—H···O and N—H···O hydrogen bonds are observed (Table 1). Molecules are linked into three-dimensional network by O—H···O hydrogen bonds (Fig. 2).
For related structures, see: Pu (2008); Wang et al. (2009). For reference structural data, see: Allen et al. (1987).
Data collection: SMART (Siemens, 1996); cell
SAINT (Siemens, 1996); data reduction: SAINT (Siemens, 1996); 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).C16H16N2O5·H2O | F(000) = 704 |
Mr = 334.32 | Dx = 1.432 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 2817 reflections |
a = 10.2573 (8) Å | θ = 2.3–28.0° |
b = 12.4199 (10) Å | µ = 0.11 mm−1 |
c = 14.0042 (8) Å | T = 295 K |
β = 119.666 (4)° | Block, light yellow |
V = 1550.2 (2) Å3 | 0.20 × 0.18 × 0.17 mm |
Z = 4 |
Siemens SMART CCD diffractometer | 2735 independent reflections |
Radiation source: fine-focus sealed tube | 2110 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.060 |
ω scans | θmax = 25.1°, θmin = 2.3° |
Absorption correction: multi-scan (SADABS; Siemens, 1996) | h = −12→10 |
Tmin = 0.978, Tmax = 0.981 | k = −14→14 |
7993 measured reflections | l = −16→15 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.036 | H-atom parameters constrained |
wR(F2) = 0.098 | w = 1/[σ2(Fo2) + (0.0472P)2 + 0.0836P] where P = (Fo2 + 2Fc2)/3 |
S = 1.02 | (Δ/σ)max < 0.001 |
2735 reflections | Δρmax = 0.30 e Å−3 |
220 parameters | Δρmin = −0.15 e Å−3 |
0 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0092 (15) |
C16H16N2O5·H2O | V = 1550.2 (2) Å3 |
Mr = 334.32 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 10.2573 (8) Å | µ = 0.11 mm−1 |
b = 12.4199 (10) Å | T = 295 K |
c = 14.0042 (8) Å | 0.20 × 0.18 × 0.17 mm |
β = 119.666 (4)° |
Siemens SMART CCD diffractometer | 2735 independent reflections |
Absorption correction: multi-scan (SADABS; Siemens, 1996) | 2110 reflections with I > 2σ(I) |
Tmin = 0.978, Tmax = 0.981 | Rint = 0.060 |
7993 measured reflections |
R[F2 > 2σ(F2)] = 0.036 | 0 restraints |
wR(F2) = 0.098 | H-atom parameters constrained |
S = 1.02 | Δρmax = 0.30 e Å−3 |
2735 reflections | Δρmin = −0.15 e Å−3 |
220 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 | ||
O1 | 0.29807 (12) | 0.63600 (8) | 0.00386 (8) | 0.0415 (3) | |
H1 | 0.3478 | 0.6763 | 0.0558 | 0.062* | |
O2 | 0.25882 (12) | 0.49266 (9) | −0.15328 (8) | 0.0451 (3) | |
H2 | 0.2479 | 0.5582 | −0.1561 | 0.068* | |
O3 | 0.50018 (13) | 0.24912 (8) | 0.30247 (8) | 0.0462 (3) | |
O4 | 0.83630 (14) | 0.60874 (9) | 0.70864 (9) | 0.0516 (3) | |
O5 | 0.84768 (13) | 0.17847 (9) | 0.81326 (9) | 0.0554 (4) | |
O6 | 0.71520 (13) | 0.60032 (9) | 0.33312 (9) | 0.0469 (3) | |
H17 | 0.7355 | 0.5747 | 0.2857 | 0.070* | |
H18 | 0.6560 | 0.6530 | 0.3021 | 0.070* | |
N1 | 0.56517 (14) | 0.42030 (10) | 0.36286 (9) | 0.0374 (3) | |
H1A | 0.5658 | 0.4873 | 0.3477 | 0.045* | |
N2 | 0.62828 (14) | 0.38569 (10) | 0.47007 (10) | 0.0386 (3) | |
C1 | 0.43573 (16) | 0.38751 (11) | 0.16836 (11) | 0.0311 (4) | |
C2 | 0.39529 (16) | 0.49534 (12) | 0.14219 (11) | 0.0324 (4) | |
H2A | 0.4068 | 0.5431 | 0.1970 | 0.039* | |
C3 | 0.33846 (15) | 0.53178 (12) | 0.03578 (12) | 0.0306 (3) | |
C4 | 0.31715 (16) | 0.45885 (12) | −0.04685 (11) | 0.0328 (4) | |
C5 | 0.35509 (17) | 0.35223 (13) | −0.02211 (12) | 0.0380 (4) | |
H5 | 0.3408 | 0.3041 | −0.0773 | 0.046* | |
C6 | 0.41477 (17) | 0.31659 (12) | 0.08543 (12) | 0.0363 (4) | |
H6 | 0.4409 | 0.2445 | 0.1020 | 0.044* | |
C7 | 0.50232 (16) | 0.34597 (12) | 0.28220 (12) | 0.0336 (4) | |
C8 | 0.69125 (17) | 0.45828 (13) | 0.54315 (12) | 0.0378 (4) | |
H8 | 0.6879 | 0.5300 | 0.5230 | 0.045* | |
C9 | 0.76899 (16) | 0.42735 (13) | 0.65942 (11) | 0.0346 (4) | |
C10 | 0.84706 (17) | 0.50414 (13) | 0.74194 (12) | 0.0364 (4) | |
C11 | 0.92900 (17) | 0.46990 (14) | 0.84979 (12) | 0.0410 (4) | |
H11 | 0.9825 | 0.5200 | 0.9049 | 0.049* | |
C12 | 0.93298 (18) | 0.36251 (14) | 0.87737 (12) | 0.0429 (4) | |
H12 | 0.9899 | 0.3410 | 0.9503 | 0.051* | |
C13 | 0.85242 (18) | 0.28700 (13) | 0.79661 (12) | 0.0396 (4) | |
C14 | 0.77166 (17) | 0.32066 (13) | 0.68859 (12) | 0.0390 (4) | |
H14 | 0.7176 | 0.2702 | 0.6340 | 0.047* | |
C15 | 0.9048 (2) | 0.68888 (14) | 0.79085 (14) | 0.0512 (5) | |
H15A | 0.8601 | 0.6884 | 0.8370 | 0.077* | |
H15B | 0.8903 | 0.7582 | 0.7567 | 0.077* | |
H15C | 1.0102 | 0.6743 | 0.8344 | 0.077* | |
C16 | 0.9447 (2) | 0.13853 (17) | 0.92118 (15) | 0.0683 (6) | |
H16A | 1.0461 | 0.1594 | 0.9442 | 0.102* | |
H16B | 0.9382 | 0.0614 | 0.9210 | 0.102* | |
H16C | 0.9151 | 0.1678 | 0.9710 | 0.102* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0508 (7) | 0.0360 (6) | 0.0266 (6) | 0.0042 (5) | 0.0106 (5) | 0.0021 (5) |
O2 | 0.0597 (8) | 0.0478 (7) | 0.0227 (6) | 0.0049 (5) | 0.0166 (6) | 0.0044 (5) |
O3 | 0.0635 (8) | 0.0327 (6) | 0.0257 (6) | −0.0063 (5) | 0.0093 (6) | 0.0017 (5) |
O4 | 0.0685 (8) | 0.0415 (7) | 0.0295 (6) | −0.0086 (6) | 0.0126 (6) | −0.0060 (5) |
O5 | 0.0657 (8) | 0.0467 (7) | 0.0324 (7) | −0.0016 (6) | 0.0079 (6) | 0.0076 (5) |
O6 | 0.0586 (8) | 0.0424 (7) | 0.0345 (6) | 0.0024 (5) | 0.0190 (6) | 0.0026 (5) |
N1 | 0.0499 (8) | 0.0325 (7) | 0.0176 (6) | −0.0026 (6) | 0.0075 (6) | 0.0025 (5) |
N2 | 0.0463 (8) | 0.0408 (8) | 0.0196 (6) | −0.0029 (6) | 0.0093 (6) | 0.0009 (6) |
C1 | 0.0319 (8) | 0.0328 (8) | 0.0222 (7) | −0.0040 (6) | 0.0084 (6) | −0.0006 (6) |
C2 | 0.0339 (8) | 0.0351 (8) | 0.0226 (8) | −0.0032 (6) | 0.0097 (7) | −0.0039 (6) |
C3 | 0.0280 (8) | 0.0335 (8) | 0.0243 (8) | 0.0000 (6) | 0.0084 (6) | 0.0013 (6) |
C4 | 0.0326 (8) | 0.0427 (9) | 0.0200 (8) | −0.0026 (7) | 0.0107 (7) | 0.0008 (6) |
C5 | 0.0471 (10) | 0.0385 (9) | 0.0254 (8) | −0.0036 (7) | 0.0156 (7) | −0.0065 (7) |
C6 | 0.0429 (9) | 0.0322 (8) | 0.0277 (8) | −0.0012 (7) | 0.0128 (7) | −0.0007 (7) |
C7 | 0.0361 (9) | 0.0337 (9) | 0.0238 (8) | −0.0029 (6) | 0.0094 (7) | −0.0008 (6) |
C8 | 0.0433 (9) | 0.0373 (9) | 0.0265 (8) | −0.0001 (7) | 0.0125 (7) | −0.0012 (7) |
C9 | 0.0335 (9) | 0.0432 (9) | 0.0216 (8) | 0.0009 (6) | 0.0095 (7) | −0.0026 (6) |
C10 | 0.0388 (9) | 0.0410 (9) | 0.0268 (8) | −0.0007 (7) | 0.0143 (7) | −0.0034 (7) |
C11 | 0.0438 (10) | 0.0484 (10) | 0.0233 (8) | −0.0048 (7) | 0.0109 (7) | −0.0091 (7) |
C12 | 0.0454 (10) | 0.0542 (11) | 0.0204 (8) | 0.0024 (8) | 0.0097 (7) | 0.0005 (7) |
C13 | 0.0425 (10) | 0.0427 (10) | 0.0278 (8) | 0.0002 (7) | 0.0130 (7) | 0.0009 (7) |
C14 | 0.0413 (9) | 0.0433 (10) | 0.0240 (8) | −0.0017 (7) | 0.0098 (7) | −0.0041 (7) |
C15 | 0.0569 (11) | 0.0437 (10) | 0.0422 (10) | −0.0060 (8) | 0.0162 (9) | −0.0106 (8) |
C16 | 0.0812 (15) | 0.0597 (13) | 0.0383 (11) | 0.0024 (10) | 0.0099 (10) | 0.0188 (9) |
O1—C3 | 1.3652 (17) | C4—C5 | 1.375 (2) |
O1—H1 | 0.8200 | C5—C6 | 1.388 (2) |
O2—C4 | 1.3687 (16) | C5—H5 | 0.9300 |
O2—H2 | 0.8198 | C6—H6 | 0.9300 |
O3—C7 | 1.2386 (17) | C8—C9 | 1.466 (2) |
O4—C10 | 1.3662 (19) | C8—H8 | 0.9300 |
O4—C15 | 1.4173 (19) | C9—C14 | 1.383 (2) |
O5—C13 | 1.3729 (19) | C9—C10 | 1.404 (2) |
O5—C16 | 1.4254 (19) | C10—C11 | 1.383 (2) |
O6—H17 | 0.8500 | C11—C12 | 1.384 (2) |
O6—H18 | 0.8508 | C11—H11 | 0.9300 |
N1—C7 | 1.3501 (18) | C12—C13 | 1.384 (2) |
N1—N2 | 1.3770 (17) | C12—H12 | 0.9300 |
N1—H1A | 0.8595 | C13—C14 | 1.382 (2) |
N2—C8 | 1.2740 (19) | C14—H14 | 0.9300 |
C1—C6 | 1.387 (2) | C15—H15A | 0.9600 |
C1—C2 | 1.396 (2) | C15—H15B | 0.9600 |
C1—C7 | 1.482 (2) | C15—H15C | 0.9600 |
C2—C3 | 1.380 (2) | C16—H16A | 0.9600 |
C2—H2A | 0.9300 | C16—H16B | 0.9600 |
C3—C4 | 1.399 (2) | C16—H16C | 0.9600 |
C3—O1—H1 | 109.5 | C9—C8—H8 | 120.4 |
C4—O2—H2 | 109.4 | C14—C9—C10 | 119.21 (14) |
C10—O4—C15 | 117.82 (12) | C14—C9—C8 | 119.97 (14) |
C13—O5—C16 | 117.19 (13) | C10—C9—C8 | 120.76 (14) |
H17—O6—H18 | 106.2 | O4—C10—C11 | 124.61 (14) |
C7—N1—N2 | 118.09 (12) | O4—C10—C9 | 116.64 (13) |
C7—N1—H1A | 120.9 | C11—C10—C9 | 118.75 (15) |
N2—N1—H1A | 121.0 | C10—C11—C12 | 121.29 (15) |
C8—N2—N1 | 115.64 (13) | C10—C11—H11 | 119.4 |
C6—C1—C2 | 119.12 (13) | C12—C11—H11 | 119.4 |
C6—C1—C7 | 118.53 (13) | C11—C12—C13 | 120.12 (14) |
C2—C1—C7 | 122.35 (13) | C11—C12—H12 | 119.9 |
C3—C2—C1 | 120.64 (13) | C13—C12—H12 | 119.9 |
C3—C2—H2A | 119.7 | O5—C13—C14 | 115.51 (14) |
C1—C2—H2A | 119.7 | O5—C13—C12 | 125.69 (14) |
O1—C3—C2 | 124.19 (13) | C14—C13—C12 | 118.78 (15) |
O1—C3—C4 | 116.44 (13) | C13—C14—C9 | 121.79 (15) |
C2—C3—C4 | 119.36 (13) | C13—C14—H14 | 119.1 |
O2—C4—C5 | 119.11 (13) | C9—C14—H14 | 119.1 |
O2—C4—C3 | 120.48 (13) | O4—C15—H15A | 109.5 |
C5—C4—C3 | 120.41 (13) | O4—C15—H15B | 109.5 |
C4—C5—C6 | 119.89 (14) | H15A—C15—H15B | 109.5 |
C4—C5—H5 | 120.1 | O4—C15—H15C | 109.5 |
C6—C5—H5 | 120.1 | H15A—C15—H15C | 109.5 |
C1—C6—C5 | 120.56 (14) | H15B—C15—H15C | 109.5 |
C1—C6—H6 | 119.7 | O5—C16—H16A | 109.5 |
C5—C6—H6 | 119.7 | O5—C16—H16B | 109.5 |
O3—C7—N1 | 121.84 (13) | H16A—C16—H16B | 109.5 |
O3—C7—C1 | 122.25 (13) | O5—C16—H16C | 109.5 |
N1—C7—C1 | 115.91 (12) | H16A—C16—H16C | 109.5 |
N2—C8—C9 | 119.18 (14) | H16B—C16—H16C | 109.5 |
N2—C8—H8 | 120.4 | ||
C7—N1—N2—C8 | 177.35 (14) | N1—N2—C8—C9 | −176.41 (13) |
C6—C1—C2—C3 | −1.5 (2) | N2—C8—C9—C14 | −0.8 (2) |
C7—C1—C2—C3 | 177.70 (13) | N2—C8—C9—C10 | 176.25 (15) |
C1—C2—C3—O1 | −179.19 (13) | C15—O4—C10—C11 | −4.8 (2) |
C1—C2—C3—C4 | 2.0 (2) | C15—O4—C10—C9 | 175.43 (14) |
O1—C3—C4—O2 | 0.1 (2) | C14—C9—C10—O4 | −177.86 (14) |
C2—C3—C4—O2 | 179.00 (13) | C8—C9—C10—O4 | 5.1 (2) |
O1—C3—C4—C5 | 179.83 (13) | C14—C9—C10—C11 | 2.4 (2) |
C2—C3—C4—C5 | −1.2 (2) | C8—C9—C10—C11 | −174.70 (14) |
O2—C4—C5—C6 | 179.82 (14) | O4—C10—C11—C12 | 179.15 (15) |
C3—C4—C5—C6 | 0.1 (2) | C9—C10—C11—C12 | −1.1 (2) |
C2—C1—C6—C5 | 0.3 (2) | C10—C11—C12—C13 | −0.9 (2) |
C7—C1—C6—C5 | −178.94 (14) | C16—O5—C13—C14 | 172.04 (16) |
C4—C5—C6—C1 | 0.4 (2) | C16—O5—C13—C12 | −6.2 (3) |
N2—N1—C7—O3 | 0.1 (2) | C11—C12—C13—O5 | 179.70 (15) |
N2—N1—C7—C1 | 179.86 (13) | C11—C12—C13—C14 | 1.5 (2) |
C6—C1—C7—O3 | −21.2 (2) | O5—C13—C14—C9 | −178.57 (14) |
C2—C1—C7—O3 | 159.56 (15) | C12—C13—C14—C9 | −0.2 (2) |
C6—C1—C7—N1 | 159.05 (14) | C10—C9—C14—C13 | −1.8 (2) |
C2—C1—C7—N1 | −20.2 (2) | C8—C9—C14—C13 | 175.35 (14) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O3i | 0.82 | 2.03 | 2.8384 (15) | 168 |
O2—H2···O1 | 0.82 | 2.25 | 2.7014 (15) | 115 |
O2—H2···O5i | 0.82 | 2.43 | 3.0191 (15) | 130 |
O6—H17···O2ii | 0.85 | 2.06 | 2.9003 (15) | 169 |
O6—H18···O3i | 0.85 | 1.95 | 2.7837 (15) | 165 |
N1—H1A···O6 | 0.86 | 2.16 | 2.8592 (17) | 138 |
Symmetry codes: (i) −x+1, y+1/2, −z+1/2; (ii) −x+1, −y+1, −z. |
Experimental details
Crystal data | |
Chemical formula | C16H16N2O5·H2O |
Mr | 334.32 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 295 |
a, b, c (Å) | 10.2573 (8), 12.4199 (10), 14.0042 (8) |
β (°) | 119.666 (4) |
V (Å3) | 1550.2 (2) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.11 |
Crystal size (mm) | 0.20 × 0.18 × 0.17 |
Data collection | |
Diffractometer | Siemens SMART CCD |
Absorption correction | Multi-scan (SADABS; Siemens, 1996) |
Tmin, Tmax | 0.978, 0.981 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7993, 2735, 2110 |
Rint | 0.060 |
(sin θ/λ)max (Å−1) | 0.596 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.036, 0.098, 1.02 |
No. of reflections | 2735 |
No. of parameters | 220 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.30, −0.15 |
Computer programs: SMART (Siemens, 1996), SAINT (Siemens, 1996), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O3i | 0.82 | 2.03 | 2.8384 (15) | 168 |
O2—H2···O1 | 0.82 | 2.25 | 2.7014 (15) | 115 |
O2—H2···O5i | 0.82 | 2.43 | 3.0191 (15) | 130 |
O6—H17···O2ii | 0.85 | 2.06 | 2.9003 (15) | 169 |
O6—H18···O3i | 0.85 | 1.95 | 2.7837 (15) | 165 |
N1—H1A···O6 | 0.86 | 2.16 | 2.8592 (17) | 138 |
Symmetry codes: (i) −x+1, y+1/2, −z+1/2; (ii) −x+1, −y+1, −z. |
Footnotes
‡Additional correspondence author, e-mail: qihui79@hotmail.com.
References
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Schiff base compounds have been of great interest for many years. These compounds play an important role in the development of coordination chemistry related to catalysis and enzymatic reactions, magnetism and molecular architectures (Pu, 2008). As a part of our on going investigation in this field we have determined the crystal structure of the title compound, (I).
The Schiff base molecule of the compound displays a trans configuration with respect to the C=N and C—N bonds(Fig. 1). All the bond lengths are within normal ranges (Allen et al., 1987), and are comparable to other Schiff base compounds containing 2,5-dimethoxybenzaldehyde (Wang et al., 2009). The dihedral angle between the two benzene rings is 25.9 (1)°. Intramolecular O—H···O and N—H···O hydrogen bonds are observed (Table 1). Molecules are linked into three-dimensional network by O—H···O hydrogen bonds (Fig. 2).