organic compounds
(E)-N′-[(2-Hydroxy-1-naphthalen-1-yl)methylidene]-3-methylbenzohydrazide
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, C19H16N2O2, the benzene ring and naphthyl ring system are inclined at a dihedral angle of 16.1 (3)°. An intramolecular O—H⋯N hydrogen bond influences the molecular conformation. In the crystal, molecules are linked through N—H⋯O hydrogen bonds into chains running along the a axis.
Related literature
For the medicinal applications of hydrazone compounds, see: Hillmer et al. (2010); Raj et al. (2007). For we have reported previously, see: Liu & You (2010); Liu & Wang (2010). For the crystal structures of other similar hydrazone compounds, see: Vijayakumar et al. (2009). For related structures, see: Xu et al. (2009); Shafiq et al. (2009).
Experimental
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: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.
Supporting information
10.1107/S1600536811010361/sj5120sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811010361/sj5120Isup2.hkl
The title compound was prepared by the condensation reaction of 2-hydroxy-1-naphthaldehyde (0.05 mol, 8.6 g) and 3-methylbenzohydrazide (0.05 mol, 7.5 g) in anhydrous methanol (200 ml) at ambient temperature. Colourless block-shaped single crystals suitable for X-ray structural determination were obtained by slow evaporation of the solution for a period of a week.
H2 was located from a difference Fourier map and refined isotropically, with the N–H distance restrained to 0.90 (1) Å. The remaining H atoms were positioned geometrically and constrained to ride on their parent atoms, with C–H distances of 0.93–0.96 Å, O–H distance of 0.82 Å, and with Uiso(H) = 1.2Ueq(C) and 1.5Ueq(O and C19).
Data collection: SMART (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).C19H16N2O2 | F(000) = 640 |
Mr = 304.34 | Dx = 1.298 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 2077 reflections |
a = 7.1927 (11) Å | θ = 2.6–28.2° |
b = 31.042 (4) Å | µ = 0.09 mm−1 |
c = 7.3557 (11) Å | T = 298 K |
β = 108.455 (2)° | Block, colourless |
V = 1557.9 (4) Å3 | 0.20 × 0.20 × 0.18 mm |
Z = 4 |
Bruker SMART CCD area-detector diffractometer | 3295 independent reflections |
Radiation source: fine-focus sealed tube | 1736 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.045 |
ω scans | θmax = 27.0°, θmin = 2.6° |
Absorption correction: multi-scan (SADABS; Bruker, 2001) | h = −8→9 |
Tmin = 0.983, Tmax = 0.985 | k = −33→39 |
8247 measured reflections | l = −9→9 |
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) = 0.166 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0465P)2 + 1.2072P] where P = (Fo2 + 2Fc2)/3 |
3295 reflections | (Δ/σ)max < 0.001 |
214 parameters | Δρmax = 0.17 e Å−3 |
1 restraint | Δρmin = −0.20 e Å−3 |
C19H16N2O2 | V = 1557.9 (4) Å3 |
Mr = 304.34 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 7.1927 (11) Å | µ = 0.09 mm−1 |
b = 31.042 (4) Å | T = 298 K |
c = 7.3557 (11) Å | 0.20 × 0.20 × 0.18 mm |
β = 108.455 (2)° |
Bruker SMART CCD area-detector diffractometer | 3295 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2001) | 1736 reflections with I > 2σ(I) |
Tmin = 0.983, Tmax = 0.985 | Rint = 0.045 |
8247 measured reflections |
R[F2 > 2σ(F2)] = 0.066 | 1 restraint |
wR(F2) = 0.166 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | Δρmax = 0.17 e Å−3 |
3295 reflections | Δρmin = −0.20 e Å−3 |
214 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 | 0.9044 (4) | 0.21446 (7) | 0.1747 (4) | 0.0379 (6) | |
N2 | 0.8759 (4) | 0.24304 (8) | 0.0245 (4) | 0.0390 (7) | |
O1 | 0.9690 (4) | 0.19721 (7) | 0.5307 (3) | 0.0551 (7) | |
H1 | 0.9671 | 0.2122 | 0.4383 | 0.083* | |
O2 | 1.0611 (3) | 0.29377 (6) | 0.2203 (3) | 0.0471 (6) | |
C1 | 0.8618 (4) | 0.14411 (9) | 0.2810 (4) | 0.0337 (7) | |
C2 | 0.9202 (5) | 0.15626 (10) | 0.4718 (4) | 0.0400 (8) | |
C3 | 0.9317 (5) | 0.12581 (12) | 0.6167 (5) | 0.0525 (9) | |
H3 | 0.9674 | 0.1347 | 0.7439 | 0.063* | |
C4 | 0.8914 (5) | 0.08380 (12) | 0.5729 (5) | 0.0542 (10) | |
H4 | 0.9004 | 0.0642 | 0.6707 | 0.065* | |
C5 | 0.8357 (5) | 0.06922 (10) | 0.3811 (5) | 0.0422 (8) | |
C6 | 0.7989 (5) | 0.02510 (11) | 0.3339 (6) | 0.0587 (11) | |
H6 | 0.8090 | 0.0052 | 0.4312 | 0.070* | |
C7 | 0.7494 (6) | 0.01134 (11) | 0.1513 (7) | 0.0654 (12) | |
H7 | 0.7285 | −0.0178 | 0.1234 | 0.079* | |
C8 | 0.7298 (6) | 0.04084 (11) | 0.0046 (6) | 0.0622 (11) | |
H8 | 0.6937 | 0.0313 | −0.1216 | 0.075* | |
C9 | 0.7629 (5) | 0.08375 (10) | 0.0430 (5) | 0.0497 (9) | |
H9 | 0.7481 | 0.1029 | −0.0577 | 0.060* | |
C10 | 0.8191 (4) | 0.09950 (9) | 0.2322 (4) | 0.0358 (7) | |
C11 | 0.8430 (4) | 0.17606 (9) | 0.1302 (4) | 0.0360 (7) | |
H11 | 0.7864 | 0.1685 | 0.0023 | 0.043* | |
C12 | 0.9562 (5) | 0.28269 (9) | 0.0607 (4) | 0.0355 (7) | |
C13 | 0.9074 (4) | 0.31232 (9) | −0.1072 (4) | 0.0330 (7) | |
C14 | 0.8915 (4) | 0.35600 (9) | −0.0735 (5) | 0.0385 (8) | |
H14 | 0.9137 | 0.3654 | 0.0517 | 0.046* | |
C15 | 0.8436 (5) | 0.38593 (10) | −0.2206 (5) | 0.0456 (9) | |
C16 | 0.8164 (5) | 0.37093 (12) | −0.4034 (5) | 0.0551 (10) | |
H16 | 0.7840 | 0.3904 | −0.5048 | 0.066* | |
C17 | 0.8357 (5) | 0.32802 (12) | −0.4401 (5) | 0.0560 (10) | |
H17 | 0.8191 | 0.3190 | −0.5648 | 0.067* | |
C18 | 0.8798 (5) | 0.29812 (10) | −0.2929 (5) | 0.0421 (8) | |
H18 | 0.8906 | 0.2690 | −0.3180 | 0.051* | |
C19 | 0.8209 (6) | 0.43299 (10) | −0.1815 (6) | 0.0701 (12) | |
H19A | 0.9126 | 0.4496 | −0.2228 | 0.105* | |
H19B | 0.8456 | 0.4372 | −0.0466 | 0.105* | |
H19C | 0.6899 | 0.4421 | −0.2501 | 0.105* | |
H2 | 0.782 (3) | 0.2362 (10) | −0.085 (3) | 0.048 (10)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
N1 | 0.0403 (16) | 0.0307 (14) | 0.0373 (15) | 0.0000 (12) | 0.0046 (12) | 0.0056 (12) |
N2 | 0.0448 (17) | 0.0299 (14) | 0.0311 (16) | −0.0027 (12) | −0.0040 (13) | 0.0032 (12) |
O1 | 0.0730 (18) | 0.0479 (14) | 0.0415 (14) | −0.0114 (13) | 0.0139 (14) | −0.0084 (11) |
O2 | 0.0525 (15) | 0.0393 (13) | 0.0358 (13) | −0.0018 (11) | −0.0055 (11) | −0.0021 (10) |
C1 | 0.0314 (17) | 0.0342 (17) | 0.0336 (17) | 0.0031 (13) | 0.0074 (14) | 0.0037 (13) |
C2 | 0.039 (2) | 0.0409 (19) | 0.0386 (19) | 0.0010 (15) | 0.0110 (16) | 0.0014 (15) |
C3 | 0.059 (2) | 0.065 (2) | 0.0294 (19) | 0.0026 (19) | 0.0086 (17) | 0.0098 (17) |
C4 | 0.053 (2) | 0.057 (2) | 0.053 (2) | 0.0070 (18) | 0.0164 (19) | 0.0223 (19) |
C5 | 0.0315 (18) | 0.0382 (19) | 0.056 (2) | 0.0047 (14) | 0.0121 (16) | 0.0126 (16) |
C6 | 0.049 (2) | 0.041 (2) | 0.087 (3) | 0.0041 (17) | 0.021 (2) | 0.022 (2) |
C7 | 0.067 (3) | 0.033 (2) | 0.094 (3) | −0.0100 (19) | 0.023 (3) | −0.005 (2) |
C8 | 0.071 (3) | 0.042 (2) | 0.072 (3) | −0.0121 (19) | 0.021 (2) | −0.012 (2) |
C9 | 0.056 (2) | 0.0386 (19) | 0.052 (2) | −0.0084 (16) | 0.0147 (19) | −0.0020 (16) |
C10 | 0.0284 (18) | 0.0361 (17) | 0.042 (2) | 0.0035 (13) | 0.0104 (15) | 0.0034 (14) |
C11 | 0.0352 (19) | 0.0351 (17) | 0.0339 (18) | 0.0015 (14) | 0.0056 (15) | 0.0023 (14) |
C12 | 0.0378 (19) | 0.0307 (17) | 0.0336 (19) | 0.0043 (14) | 0.0051 (15) | −0.0026 (14) |
C13 | 0.0312 (17) | 0.0301 (16) | 0.0345 (18) | −0.0003 (13) | 0.0056 (14) | 0.0007 (13) |
C14 | 0.0356 (19) | 0.0314 (16) | 0.045 (2) | −0.0033 (14) | 0.0074 (15) | −0.0004 (14) |
C15 | 0.0315 (19) | 0.0367 (19) | 0.066 (3) | −0.0003 (14) | 0.0114 (17) | 0.0126 (17) |
C16 | 0.043 (2) | 0.058 (2) | 0.059 (3) | −0.0010 (18) | 0.0089 (19) | 0.0244 (19) |
C17 | 0.055 (2) | 0.073 (3) | 0.039 (2) | −0.003 (2) | 0.0122 (18) | 0.0092 (19) |
C18 | 0.042 (2) | 0.0399 (18) | 0.043 (2) | −0.0014 (15) | 0.0107 (16) | −0.0012 (15) |
C19 | 0.059 (3) | 0.036 (2) | 0.114 (4) | 0.0054 (18) | 0.027 (3) | 0.019 (2) |
N1—C11 | 1.277 (4) | C8—C9 | 1.367 (4) |
N1—N2 | 1.380 (3) | C8—H8 | 0.9300 |
N2—C12 | 1.350 (4) | C9—C10 | 1.408 (4) |
N2—H2 | 0.898 (10) | C9—H9 | 0.9300 |
O1—C2 | 1.353 (4) | C11—H11 | 0.9300 |
O1—H1 | 0.8200 | C12—C13 | 1.490 (4) |
O2—C12 | 1.227 (3) | C13—C18 | 1.388 (4) |
C1—C2 | 1.384 (4) | C13—C14 | 1.390 (4) |
C1—C10 | 1.439 (4) | C14—C15 | 1.384 (4) |
C1—C11 | 1.462 (4) | C14—H14 | 0.9300 |
C2—C3 | 1.407 (4) | C15—C16 | 1.377 (5) |
C3—C4 | 1.352 (5) | C15—C19 | 1.508 (4) |
C3—H3 | 0.9300 | C16—C17 | 1.375 (5) |
C4—C5 | 1.413 (5) | C16—H16 | 0.9300 |
C4—H4 | 0.9300 | C17—C18 | 1.385 (4) |
C5—C6 | 1.417 (5) | C17—H17 | 0.9300 |
C5—C10 | 1.419 (4) | C18—H18 | 0.9300 |
C6—C7 | 1.346 (5) | C19—H19A | 0.9600 |
C6—H6 | 0.9300 | C19—H19B | 0.9600 |
C7—C8 | 1.388 (5) | C19—H19C | 0.9600 |
C7—H7 | 0.9300 | ||
C11—N1—N2 | 116.3 (3) | C9—C10—C1 | 123.5 (3) |
C12—N2—N1 | 118.8 (2) | C5—C10—C1 | 119.1 (3) |
C12—N2—H2 | 123 (2) | N1—C11—C1 | 119.8 (3) |
N1—N2—H2 | 116 (2) | N1—C11—H11 | 120.1 |
C2—O1—H1 | 109.5 | C1—C11—H11 | 120.1 |
C2—C1—C10 | 119.2 (3) | O2—C12—N2 | 122.7 (3) |
C2—C1—C11 | 120.7 (3) | O2—C12—C13 | 122.2 (3) |
C10—C1—C11 | 120.2 (3) | N2—C12—C13 | 115.2 (3) |
O1—C2—C1 | 123.0 (3) | C18—C13—C14 | 119.4 (3) |
O1—C2—C3 | 116.2 (3) | C18—C13—C12 | 122.8 (3) |
C1—C2—C3 | 120.8 (3) | C14—C13—C12 | 117.7 (3) |
C4—C3—C2 | 120.7 (3) | C15—C14—C13 | 122.0 (3) |
C4—C3—H3 | 119.7 | C15—C14—H14 | 119.0 |
C2—C3—H3 | 119.7 | C13—C14—H14 | 119.0 |
C3—C4—C5 | 121.2 (3) | C16—C15—C14 | 117.4 (3) |
C3—C4—H4 | 119.4 | C16—C15—C19 | 121.6 (3) |
C5—C4—H4 | 119.4 | C14—C15—C19 | 121.1 (3) |
C4—C5—C6 | 121.7 (3) | C17—C16—C15 | 121.8 (3) |
C4—C5—C10 | 119.1 (3) | C17—C16—H16 | 119.1 |
C6—C5—C10 | 119.2 (3) | C15—C16—H16 | 119.1 |
C7—C6—C5 | 121.4 (3) | C16—C17—C18 | 120.6 (3) |
C7—C6—H6 | 119.3 | C16—C17—H17 | 119.7 |
C5—C6—H6 | 119.3 | C18—C17—H17 | 119.7 |
C6—C7—C8 | 119.8 (3) | C17—C18—C13 | 118.8 (3) |
C6—C7—H7 | 120.1 | C17—C18—H18 | 120.6 |
C8—C7—H7 | 120.1 | C13—C18—H18 | 120.6 |
C9—C8—C7 | 120.9 (4) | C15—C19—H19A | 109.5 |
C9—C8—H8 | 119.5 | C15—C19—H19B | 109.5 |
C7—C8—H8 | 119.5 | H19A—C19—H19B | 109.5 |
C8—C9—C10 | 121.3 (3) | C15—C19—H19C | 109.5 |
C8—C9—H9 | 119.3 | H19A—C19—H19C | 109.5 |
C10—C9—H9 | 119.3 | H19B—C19—H19C | 109.5 |
C9—C10—C5 | 117.4 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2···O2i | 0.90 (1) | 2.00 (1) | 2.869 (3) | 163 (3) |
O1—H1···N1 | 0.82 | 1.85 | 2.567 (3) | 146 |
Symmetry code: (i) x−1/2, −y+1/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | C19H16N2O2 |
Mr | 304.34 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 298 |
a, b, c (Å) | 7.1927 (11), 31.042 (4), 7.3557 (11) |
β (°) | 108.455 (2) |
V (Å3) | 1557.9 (4) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.20 × 0.20 × 0.18 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2001) |
Tmin, Tmax | 0.983, 0.985 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8247, 3295, 1736 |
Rint | 0.045 |
(sin θ/λ)max (Å−1) | 0.639 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.066, 0.166, 1.04 |
No. of reflections | 3295 |
No. of parameters | 214 |
No. of restraints | 1 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.17, −0.20 |
Computer programs: SMART (Bruker, 2007), SAINT (Bruker, 2007), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2···O2i | 0.898 (10) | 2.000 (14) | 2.869 (3) | 163 (3) |
O1—H1···N1 | 0.82 | 1.85 | 2.567 (3) | 146 |
Symmetry code: (i) x−1/2, −y+1/2, z−1/2. |
Acknowledgements
The authors acknowledge the Undergraduate Innovation Group Project of Zhejiang Province (project no. 2010R428015).
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; Raj et al., 2007). The crystal structures of such compounds are of particular interest (Vijayakumar et al., 2009). As a continuation of our work on similar compounds (Liu & You, 2010; Liu & Wang, 2010), we report herein the crystal structure of the title compound a new hydrazone.
The molecular structure of the title compound is shown in Fig. 1. The benzene ring and the naphthyl ring system are inclined at a dihedral angle of 16.1 (3) °. The dihedral angle between the C1—C10 benzene ring and the C13—C18 naphthyl ring is 16.1 (3)°. All the bond lengths are comparable to those observed in related structures (Xu et al., 2009; Shafiq et al., 2009) and those we reported previously.
In the crystal structure, molecules are linked through N–H···O hydrogen bonds, to form one-dimensional chains running along the a axis (Fig. 2 and Table 1).