organic compounds
2-{(E)-1-[2-(2-Nitrophenyl)hydrazin-1-ylidene]ethyl}benzene-1,3-diol monohydrate
aDepartment of Chemistry, University of Aberdeen, Meston Walk, Old Aberdeen AB24 3UE, Scotland, bCentro de Desenvolvimento Tecnológico em Saúde (CDTS), Fundação Oswaldo Cruz (FIOCRUZ), Casa Amarela, Campus de Manguinhos, Avenida Brasil 4365, 21040-900 Rio de Janeiro, RJ, Brazil, cCHEMSOL, 1 Harcourt Road, Aberdeen AB15 5NY, Scotland, and dDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
*Correspondence e-mail: edward.tiekink@gmail.com
The hydrazone molecule in title monohydrate, C14H13N3O4·H2O, is almost coplanar, the dihedral angle between the terminal benzene rings being 3.22 (15)°; the nitro group is coplanar with the benzene ring to which it is bonded [O—N—C—C = −2.8 (4)°]. The hydroxy group forms an intramolecular hydrogen bond with the imine N atom, and the conformation about the imine bond [1.305 (3) Å] is E. In the crystal, supramolecular layers in the (203) plane are connected into a double layer via water–nitro O—H⋯O hydrogen bonds, along with π–π interactions [ring centroid–centroid distance = 3.7859 (19) Å].
Related literature
For background on the influence of substituents upon the supramolecular structures of et al. (2004); Ferguson et al. (2005); Baddeley et al. (2009).
see: GlidewellExperimental
Crystal data
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Refinement
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Data collection: COLLECT (Hooft, 1998); cell DENZO (Otwinowski & Minor, 1997) and COLLECT; data reduction: DENZO and COLLECT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
10.1107/S1600536812006241/pv2513sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812006241/pv2513Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812006241/pv2513Isup3.cml
A solution of 2-nitrophenylhydrazine and 2,6-dihydroxyacetophenone (2 mmol each) in ethanol (20 ml) was refluxed for 1 h, rotary evaporated and the residue recrystallized from methanol, m.p. 452–454 K.
The C-bound H atoms were geometrically placed (C—H = 0.95–0.98 Å) and refined as riding with Uiso(H) = 1.2–1.5Ueq(C). The O- and N-bound H atoms were located from a difference map and refined with the distance restraints O—H = 0.84±0.01 and N—H = 0.88±0.01 Å, and with Uiso(H) = zUeq(carrier atom); z = 1.5 for O and z = 1.2 for N.
Data collection: COLLECT (Hooft, 1998); cell
DENZO (Otwinowski & Minor, 1997) and COLLECT (Hooft, 1998); data reduction: DENZO (Otwinowski & Minor, 1997) and COLLECT (Hooft, 1998); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).Fig. 1. The molecular structures of the constituents of (I) showing the atom-labelling scheme and displacement ellipsoids at the 50% probability level. | |
Fig. 2. A view in projection down the b axis of the packing of supramolecular double layers in (I). The O—H···O (orange), O—H···N (orange), N—H···O (blue), C—H···O (brown) and π–π (purple) interactions are shown as dashed lines. |
C14H13N3O4·H2O | F(000) = 640 |
Mr = 305.29 | Dx = 1.511 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 19763 reflections |
a = 7.6448 (6) Å | θ = 2.9–27.5° |
b = 21.405 (2) Å | µ = 0.12 mm−1 |
c = 8.5755 (7) Å | T = 120 K |
β = 106.976 (5)° | Plate, brown |
V = 1342.1 (2) Å3 | 0.45 × 0.25 × 0.02 mm |
Z = 4 |
Bruker-Nonius Roper CCD camera on κ-goniostat diffractometer | 3068 independent reflections |
Radiation source: Bruker–Nonius FR591 rotating anode | 1492 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.110 |
Detector resolution: 9.091 pixels mm-1 | θmax = 27.5°, θmin = 2.9° |
ϕ & ω scans | h = −9→9 |
Absorption correction: multi-scan (SADABS; Sheldrick, 2007) | k = −27→27 |
Tmin = 0.776, Tmax = 0.998 | l = −11→11 |
16295 measured reflections |
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)] = 0.066 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.194 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.01 | w = 1/[σ2(Fo2) + (0.0914P)2] where P = (Fo2 + 2Fc2)/3 |
3068 reflections | (Δ/σ)max < 0.001 |
221 parameters | Δρmax = 0.37 e Å−3 |
6 restraints | Δρmin = −0.30 e Å−3 |
C14H13N3O4·H2O | V = 1342.1 (2) Å3 |
Mr = 305.29 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 7.6448 (6) Å | µ = 0.12 mm−1 |
b = 21.405 (2) Å | T = 120 K |
c = 8.5755 (7) Å | 0.45 × 0.25 × 0.02 mm |
β = 106.976 (5)° |
Bruker-Nonius Roper CCD camera on κ-goniostat diffractometer | 3068 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2007) | 1492 reflections with I > 2σ(I) |
Tmin = 0.776, Tmax = 0.998 | Rint = 0.110 |
16295 measured reflections |
R[F2 > 2σ(F2)] = 0.066 | 6 restraints |
wR(F2) = 0.194 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.01 | Δρmax = 0.37 e Å−3 |
3068 reflections | Δρmin = −0.30 e Å−3 |
221 parameters |
Experimental. IR (KBr, cm-1): ν 3600–2000 (v br), 3543, 3427, 3340, 1622, 1585, 1525. Anal. Found: C, 54.86; H, 5.03; N, 14.07. Calculated for C14H15N3O5: C, 55.08; H, 4.95; N, 13.76%. |
Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'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 > 2σ(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 | 0.6688 (3) | −0.09682 (11) | 0.3317 (3) | 0.0350 (6) | |
H1O | 0.659 (5) | −0.0590 (7) | 0.356 (5) | 0.062 (13)* | |
O2 | 1.1256 (3) | −0.07064 (10) | 0.8502 (3) | 0.0340 (6) | |
H2O | 1.189 (4) | −0.0952 (12) | 0.921 (3) | 0.034 (10)* | |
O3 | 0.6421 (3) | 0.18198 (10) | 0.5589 (3) | 0.0353 (6) | |
O4 | 0.4717 (3) | 0.25227 (10) | 0.4047 (3) | 0.0411 (7) | |
N1 | 0.7166 (3) | 0.00802 (11) | 0.4628 (3) | 0.0247 (6) | |
N2 | 0.6577 (3) | 0.06852 (12) | 0.4550 (3) | 0.0272 (6) | |
H2N | 0.702 (4) | 0.0956 (11) | 0.534 (3) | 0.033 (9)* | |
N3 | 0.5292 (3) | 0.19801 (13) | 0.4289 (3) | 0.0315 (7) | |
C1 | 0.8928 (4) | −0.07782 (14) | 0.5935 (4) | 0.0238 (7) | |
C2 | 0.8060 (4) | −0.11805 (15) | 0.4603 (4) | 0.0288 (8) | |
C3 | 0.8560 (4) | −0.17972 (15) | 0.4541 (4) | 0.0337 (8) | |
H3 | 0.7969 | −0.2048 | 0.3625 | 0.040* | |
C4 | 0.9922 (4) | −0.20473 (15) | 0.5816 (4) | 0.0322 (8) | |
H4 | 1.0262 | −0.2473 | 0.5779 | 0.039* | |
C5 | 1.0795 (4) | −0.16848 (14) | 0.7142 (4) | 0.0285 (8) | |
H5 | 1.1721 | −0.1863 | 0.8019 | 0.034* | |
C6 | 1.0333 (4) | −0.10608 (14) | 0.7204 (4) | 0.0256 (7) | |
C7 | 0.8350 (4) | −0.01181 (14) | 0.5962 (3) | 0.0228 (7) | |
C8 | 0.9016 (4) | 0.03103 (14) | 0.7387 (4) | 0.0314 (8) | |
H8A | 0.9969 | 0.0584 | 0.7212 | 0.043 (10)* | |
H8B | 0.9522 | 0.0063 | 0.8380 | 0.043 (9)* | |
H8C | 0.7996 | 0.0564 | 0.7506 | 0.067 (12)* | |
C9 | 0.5300 (4) | 0.09005 (14) | 0.3180 (3) | 0.0246 (7) | |
C10 | 0.4639 (4) | 0.15195 (14) | 0.3020 (3) | 0.0252 (7) | |
C11 | 0.3303 (4) | 0.17195 (15) | 0.1615 (4) | 0.0285 (8) | |
H11 | 0.2881 | 0.2139 | 0.1538 | 0.034* | |
C12 | 0.2596 (4) | 0.13127 (15) | 0.0345 (4) | 0.0307 (8) | |
H12 | 0.1681 | 0.1446 | −0.0605 | 0.037* | |
C13 | 0.3240 (4) | 0.07063 (15) | 0.0477 (4) | 0.0313 (8) | |
H13 | 0.2763 | 0.0424 | −0.0399 | 0.038* | |
C14 | 0.4557 (4) | 0.05009 (15) | 0.1848 (4) | 0.0268 (7) | |
H14 | 0.4973 | 0.0081 | 0.1895 | 0.032* | |
O1W | 0.6617 (3) | 0.14329 (12) | 0.9035 (3) | 0.0397 (6) | |
H1W | 0.560 (3) | 0.1348 (17) | 0.836 (3) | 0.060* | |
H2W | 0.714 (4) | 0.1722 (13) | 0.867 (4) | 0.060* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0414 (14) | 0.0315 (15) | 0.0260 (13) | 0.0007 (11) | 0.0000 (10) | −0.0022 (11) |
O2 | 0.0382 (14) | 0.0312 (14) | 0.0253 (13) | 0.0020 (10) | −0.0021 (11) | −0.0004 (10) |
O3 | 0.0420 (14) | 0.0314 (14) | 0.0275 (13) | −0.0038 (10) | 0.0022 (11) | 0.0001 (10) |
O4 | 0.0468 (15) | 0.0224 (14) | 0.0475 (15) | 0.0026 (11) | 0.0032 (11) | −0.0025 (11) |
N1 | 0.0256 (14) | 0.0238 (15) | 0.0257 (14) | −0.0001 (11) | 0.0088 (11) | 0.0013 (11) |
N2 | 0.0336 (16) | 0.0224 (16) | 0.0228 (15) | −0.0007 (12) | 0.0037 (12) | −0.0022 (12) |
N3 | 0.0348 (17) | 0.0299 (17) | 0.0292 (16) | −0.0038 (13) | 0.0083 (13) | 0.0002 (13) |
C1 | 0.0198 (16) | 0.0295 (18) | 0.0244 (16) | −0.0015 (13) | 0.0099 (13) | 0.0024 (13) |
C2 | 0.0312 (18) | 0.030 (2) | 0.0240 (17) | −0.0031 (14) | 0.0069 (14) | 0.0007 (14) |
C3 | 0.043 (2) | 0.029 (2) | 0.0288 (18) | −0.0028 (15) | 0.0103 (16) | −0.0062 (15) |
C4 | 0.0382 (19) | 0.0231 (19) | 0.038 (2) | −0.0017 (15) | 0.0150 (16) | −0.0007 (15) |
C5 | 0.0317 (18) | 0.0274 (19) | 0.0275 (18) | 0.0004 (14) | 0.0103 (14) | 0.0044 (14) |
C6 | 0.0298 (18) | 0.0255 (19) | 0.0225 (16) | −0.0049 (14) | 0.0092 (14) | −0.0029 (13) |
C7 | 0.0193 (16) | 0.0277 (19) | 0.0215 (16) | −0.0010 (13) | 0.0062 (13) | 0.0021 (13) |
C8 | 0.036 (2) | 0.0264 (19) | 0.0254 (18) | 0.0007 (15) | −0.0015 (15) | −0.0014 (14) |
C9 | 0.0279 (18) | 0.0288 (19) | 0.0168 (16) | −0.0020 (14) | 0.0059 (13) | 0.0003 (13) |
C10 | 0.0294 (17) | 0.0246 (19) | 0.0226 (17) | −0.0046 (14) | 0.0092 (14) | −0.0027 (13) |
C11 | 0.0307 (18) | 0.0254 (18) | 0.0315 (18) | −0.0007 (14) | 0.0124 (14) | 0.0042 (14) |
C12 | 0.0272 (18) | 0.036 (2) | 0.0265 (18) | 0.0030 (15) | 0.0040 (14) | 0.0035 (15) |
C13 | 0.0338 (19) | 0.035 (2) | 0.0239 (18) | 0.0005 (15) | 0.0061 (14) | −0.0035 (14) |
C14 | 0.0263 (17) | 0.0276 (18) | 0.0253 (17) | 0.0010 (14) | 0.0059 (13) | −0.0004 (14) |
O1W | 0.0406 (15) | 0.0385 (16) | 0.0343 (14) | −0.0005 (12) | 0.0019 (11) | 0.0024 (12) |
O1—C2 | 1.359 (4) | C5—C6 | 1.387 (4) |
O1—H1O | 0.844 (10) | C5—H5 | 0.9500 |
O2—C6 | 1.361 (3) | C7—C8 | 1.494 (4) |
O2—H2O | 0.844 (10) | C8—H8A | 0.9800 |
O3—N3 | 1.242 (3) | C8—H8B | 0.9800 |
O4—N3 | 1.238 (3) | C8—H8C | 0.9800 |
N1—C7 | 1.305 (3) | C9—C14 | 1.407 (4) |
N1—N2 | 1.366 (3) | C9—C10 | 1.411 (4) |
N2—C9 | 1.370 (4) | C10—C11 | 1.399 (4) |
N2—H2N | 0.880 (10) | C11—C12 | 1.376 (4) |
N3—C10 | 1.445 (4) | C11—H11 | 0.9500 |
C1—C6 | 1.422 (4) | C12—C13 | 1.381 (4) |
C1—C2 | 1.430 (4) | C12—H12 | 0.9500 |
C1—C7 | 1.483 (4) | C13—C14 | 1.378 (4) |
C2—C3 | 1.380 (4) | C13—H13 | 0.9500 |
C3—C4 | 1.379 (4) | C14—H14 | 0.9500 |
C3—H3 | 0.9500 | O1W—H1W | 0.841 (10) |
C4—C5 | 1.377 (4) | O1W—H2W | 0.845 (10) |
C4—H4 | 0.9500 | ||
C2—O1—H1O | 103 (3) | N1—C7—C8 | 120.1 (3) |
C6—O2—H2O | 107 (2) | C1—C7—C8 | 124.5 (2) |
C7—N1—N2 | 119.1 (3) | C7—C8—H8A | 109.5 |
N1—N2—C9 | 120.2 (2) | C7—C8—H8B | 109.5 |
N1—N2—H2N | 123 (2) | H8A—C8—H8B | 109.5 |
C9—N2—H2N | 117 (2) | C7—C8—H8C | 109.5 |
O4—N3—O3 | 122.0 (3) | H8A—C8—H8C | 109.5 |
O4—N3—C10 | 119.1 (3) | H8B—C8—H8C | 109.5 |
O3—N3—C10 | 119.0 (3) | N2—C9—C14 | 120.6 (3) |
C6—C1—C2 | 115.2 (3) | N2—C9—C10 | 123.0 (3) |
C6—C1—C7 | 123.8 (3) | C14—C9—C10 | 116.3 (3) |
C2—C1—C7 | 121.0 (3) | C11—C10—C9 | 121.5 (3) |
O1—C2—C3 | 116.5 (3) | C11—C10—N3 | 116.4 (3) |
O1—C2—C1 | 121.0 (3) | C9—C10—N3 | 122.2 (3) |
C3—C2—C1 | 122.5 (3) | C12—C11—C10 | 120.5 (3) |
C4—C3—C2 | 119.7 (3) | C12—C11—H11 | 119.8 |
C4—C3—H3 | 120.2 | C10—C11—H11 | 119.8 |
C2—C3—H3 | 120.2 | C11—C12—C13 | 118.8 (3) |
C3—C4—C5 | 120.5 (3) | C11—C12—H12 | 120.6 |
C3—C4—H4 | 119.8 | C13—C12—H12 | 120.6 |
C5—C4—H4 | 119.8 | C14—C13—C12 | 121.6 (3) |
C4—C5—C6 | 120.5 (3) | C14—C13—H13 | 119.2 |
C4—C5—H5 | 119.8 | C12—C13—H13 | 119.2 |
C6—C5—H5 | 119.8 | C13—C14—C9 | 121.3 (3) |
O2—C6—C5 | 119.4 (3) | C13—C14—H14 | 119.3 |
O2—C6—C1 | 118.9 (3) | C9—C14—H14 | 119.3 |
C5—C6—C1 | 121.6 (3) | H1W—O1W—H2W | 111 (3) |
N1—C7—C1 | 115.5 (3) | ||
C7—N1—N2—C9 | −178.3 (3) | C6—C1—C7—C8 | −7.0 (5) |
C6—C1—C2—O1 | 179.6 (3) | C2—C1—C7—C8 | 172.1 (3) |
C7—C1—C2—O1 | 0.5 (4) | N1—N2—C9—C14 | 0.9 (4) |
C6—C1—C2—C3 | −0.7 (4) | N1—N2—C9—C10 | −179.8 (3) |
C7—C1—C2—C3 | −179.8 (3) | N2—C9—C10—C11 | −178.6 (3) |
O1—C2—C3—C4 | −179.0 (3) | C14—C9—C10—C11 | 0.7 (4) |
C1—C2—C3—C4 | 1.3 (5) | N2—C9—C10—N3 | 1.2 (5) |
C2—C3—C4—C5 | −0.5 (5) | C14—C9—C10—N3 | −179.5 (3) |
C3—C4—C5—C6 | −0.8 (5) | O4—N3—C10—C11 | −3.3 (4) |
C4—C5—C6—O2 | −177.8 (3) | O3—N3—C10—C11 | 177.0 (3) |
C4—C5—C6—C1 | 1.5 (5) | O4—N3—C10—C9 | 176.9 (3) |
C2—C1—C6—O2 | 178.6 (3) | O3—N3—C10—C9 | −2.8 (4) |
C7—C1—C6—O2 | −2.3 (4) | C9—C10—C11—C12 | 0.0 (4) |
C2—C1—C6—C5 | −0.7 (4) | N3—C10—C11—C12 | −179.8 (3) |
C7—C1—C6—C5 | 178.4 (3) | C10—C11—C12—C13 | −0.6 (5) |
N2—N1—C7—C1 | −179.4 (2) | C11—C12—C13—C14 | 0.4 (5) |
N2—N1—C7—C8 | 1.2 (4) | C12—C13—C14—C9 | 0.3 (5) |
C6—C1—C7—N1 | 173.6 (3) | N2—C9—C14—C13 | 178.5 (3) |
C2—C1—C7—N1 | −7.4 (4) | C10—C9—C14—C13 | −0.8 (4) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1O···N1 | 0.85 (2) | 1.69 (2) | 2.489 (3) | 157 (4) |
N2—H2N···O3 | 0.88 (2) | 1.93 (2) | 2.602 (3) | 132 (2) |
O2—H2O···O1Wi | 0.84 (3) | 1.90 (3) | 2.742 (3) | 174 (2) |
O1W—H1W···O1ii | 0.84 (2) | 2.08 (3) | 2.910 (3) | 169 (3) |
O1W—H2W···O4iii | 0.85 (3) | 2.50 (3) | 3.256 (3) | 150 (3) |
C11—H11···O3iv | 0.95 | 2.52 | 3.447 (4) | 166 |
Symmetry codes: (i) −x+2, −y, −z+2; (ii) −x+1, −y, −z+1; (iii) x+1/2, −y+1/2, z+1/2; (iv) x−1/2, −y+1/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | C14H13N3O4·H2O |
Mr | 305.29 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 120 |
a, b, c (Å) | 7.6448 (6), 21.405 (2), 8.5755 (7) |
β (°) | 106.976 (5) |
V (Å3) | 1342.1 (2) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.12 |
Crystal size (mm) | 0.45 × 0.25 × 0.02 |
Data collection | |
Diffractometer | Bruker-Nonius Roper CCD camera on κ-goniostat diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2007) |
Tmin, Tmax | 0.776, 0.998 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 16295, 3068, 1492 |
Rint | 0.110 |
(sin θ/λ)max (Å−1) | 0.650 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.066, 0.194, 1.01 |
No. of reflections | 3068 |
No. of parameters | 221 |
No. of restraints | 6 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.37, −0.30 |
Computer programs: , DENZO (Otwinowski & Minor, 1997) and COLLECT (Hooft, 1998), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006), publCIF (Westrip, 2010).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1O···N1 | 0.845 (19) | 1.69 (2) | 2.489 (3) | 157 (4) |
N2—H2N···O3 | 0.88 (2) | 1.93 (2) | 2.602 (3) | 132 (2) |
O2—H2O···O1Wi | 0.84 (3) | 1.90 (3) | 2.742 (3) | 174 (2) |
O1W—H1W···O1ii | 0.84 (2) | 2.08 (3) | 2.910 (3) | 169 (3) |
O1W—H2W···O4iii | 0.85 (3) | 2.50 (3) | 3.256 (3) | 150 (3) |
C11—H11···O3iv | 0.95 | 2.52 | 3.447 (4) | 166 |
Symmetry codes: (i) −x+2, −y, −z+2; (ii) −x+1, −y, −z+1; (iii) x+1/2, −y+1/2, z+1/2; (iv) x−1/2, −y+1/2, z−1/2. |
Footnotes
‡Additional correspondence author, e-mail: j.wardell@abdn.ac.uk.
Acknowledgements
The use of the EPSRC X-ray crystallographic service at the University of Southampton, England, and the valuable assistance of the staff there is gratefully acknowledged. JLW acknowledges support from CAPES (Brazil). We also thank the Ministry of Higher Education (Malaysia) for funding structural studies through the High-Impact Research scheme (UM·C/HIR/MOHE/SC/12).
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The crystal structure of the title compound (I), has been determined in connection with on-going investigations into the structural chemistry of hydrazones, focusing in particular upon the influence of substituents upon their supramolecular structures, with a special emphasis on derivatives having potential biological activities. These studies have included investigations on substituted phenylhydrazines with substituted benzaldehydes (Glidewell et al., 2004; Ferguson et al., 2005) and 2-hydroxyacetophenone (Baddeley et al., 2009).
In (I) (Fig. 1), the dihedral angle between the benzene rings is 3.22 (15)°, indicating an approximately planar molecule. The nitro group is co-planar with the benzene ring to which it is bonded as seen in the value of the O3—N3—C10—C9 torsion angle of -2.8 (4)°. The hydroxy group forms an intramolecular hydrogen bond with the imine-N1 atom, Table 1. The configuration about the N1═C7 imine bond [1.305 (3) Å] is E.
With the exception of the O1w—H2w···O4iii hydrogen bond, all the interactions listed in Table 1 combine to form supramolecular layers parallel to (203). These are connected into double layers via the O1w—H2w···O4iii hydrogen bonds and π–π interactions [ring centroid···centroid distance = 3.7859 (19) Å, angle between rings = 3.22 (15)° for i: 1 - x, -y, 1 - z]. Layers stack without specific interactions between them (Fig. 2).