organic compounds
4-Hydroxybenzohydrazide
aDepartment of Chemistry, University of Karachi, Karachi 75270, Pakistan, and bDepartment of Chemistry, Government College University, Lahore, Pakistan
*Correspondence e-mail: rifat_jamal@yahoo.com
In the title compound, C7H8N2O2, the mean planes of the benzene ring and the planar hydrazide group are inclined at 25.75 (6)° with respect to each other. The structure is stabilized by intermolecular N—H⋯O and O—H⋯N hydrogen bonds.
Related literature
For related structures see: Ashiq, Jamal et al. (2008, 2009); Hanif et al. (2007); Jamal et al. (2008); Kallel et al. (1992); Saraogi et al. (2002). For the biological activity of see: Ara et al. (2007); Ashiq, Ara et al. (2008); Maqsood et al. (2006).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2007); cell SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: SHELXL97.
Supporting information
10.1107/S1600536809025094/pv2171sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536809025094/pv2171Isup2.hkl
All reagent-grade chemicals were obtained from Aldrich and Sigma Chemical companies and were used without further purification. To a solution of ethyl-4-hydroxybenzoate (3.32 g, 20 mmol) in 75 ml e thanol, hydrazine hydrate (5.0 ml, 100 mmol) was added. The mixture was refluxed for 5 h and a solid was obtained upon removal of the solvent by rotary evaporation. The resulting solid was washed with hexane to afford 4-hydroxybenzohydrazide (yield 65%) (Maqsood et al., 2006).
H atoms were positioned geometrically, with aromatic C—H, O—H and N1—H1 distances 0.93, 0.82 and 0.86 Å, respectively, and constrained to ride on their parent atoms. The H-atoms attached to N2 atom were taken from Fourier synthesis and their coordinates were refined. The thermal parameter of H-atoms of was taken 1.2 times the equivalent isotropic displacement parameters of their parent C and N-atoms and 1.5 times the O-atom.
Data collection: APEX2 (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).Fig. 1. ORTEP plot of the title compound with the ellipsoids drawn at the 50% probability level. | |
Fig. 2. A packing diagram of (I). Hydrogen bonds are shown by dashed lines. |
C7H8N2O2 | F(000) = 320 |
Mr = 152.15 | Dx = 1.487 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 2993 reflections |
a = 5.0587 (2) Å | θ = 2.9–28.3° |
b = 17.2149 (9) Å | µ = 0.11 mm−1 |
c = 7.8178 (5) Å | T = 296 K |
β = 93.489 (2)° | Needle, colourless |
V = 679.55 (6) Å3 | 0.32 × 0.18 × 0.12 mm |
Z = 4 |
Bruker Kappa APEX2 CCD diffractometer | 1697 independent reflections |
Radiation source: fine-focus sealed tube | 1348 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.023 |
ω scans | θmax = 28.3°, θmin = 2.4° |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | h = −6→6 |
Tmin = 0.965, Tmax = 0.992 | k = −22→23 |
7324 measured reflections | l = −10→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)] = 0.039 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.118 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.06 | w = 1/[σ2(Fo2) + (0.0613P)2 + 0.1539P] where P = (Fo2 + 2Fc2)/3 |
1697 reflections | (Δ/σ)max < 0.001 |
107 parameters | Δρmax = 0.36 e Å−3 |
0 restraints | Δρmin = −0.20 e Å−3 |
C7H8N2O2 | V = 679.55 (6) Å3 |
Mr = 152.15 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 5.0587 (2) Å | µ = 0.11 mm−1 |
b = 17.2149 (9) Å | T = 296 K |
c = 7.8178 (5) Å | 0.32 × 0.18 × 0.12 mm |
β = 93.489 (2)° |
Bruker Kappa APEX2 CCD diffractometer | 1697 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 1348 reflections with I > 2σ(I) |
Tmin = 0.965, Tmax = 0.992 | Rint = 0.023 |
7324 measured reflections |
R[F2 > 2σ(F2)] = 0.039 | 0 restraints |
wR(F2) = 0.118 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.06 | Δρmax = 0.36 e Å−3 |
1697 reflections | Δρmin = −0.20 e Å−3 |
107 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 | 0.7565 (2) | 0.04052 (5) | 0.14740 (17) | 0.0478 (3) | |
H1A | 0.8946 | 0.0291 | 0.2020 | 0.072* | |
O2 | 0.36833 (17) | 0.38981 (5) | 0.10180 (14) | 0.0364 (3) | |
N1 | 0.8045 (2) | 0.40995 (6) | 0.15266 (16) | 0.0331 (3) | |
H1 | 0.9606 | 0.3900 | 0.1554 | 0.040* | |
N2 | 0.7783 (2) | 0.49074 (6) | 0.1772 (2) | 0.0381 (3) | |
H12 | 0.647 (4) | 0.4969 (10) | 0.247 (2) | 0.046* | |
H22 | 0.736 (3) | 0.5124 (10) | 0.075 (2) | 0.046* | |
C1 | 0.6499 (2) | 0.27877 (7) | 0.12927 (16) | 0.0244 (3) | |
C2 | 0.4705 (2) | 0.22850 (7) | 0.04589 (17) | 0.0299 (3) | |
H2 | 0.3217 | 0.2486 | −0.0145 | 0.036* | |
C3 | 0.5095 (3) | 0.14912 (8) | 0.05121 (18) | 0.0335 (3) | |
H3 | 0.3892 | 0.1161 | −0.0066 | 0.040* | |
C4 | 0.7289 (3) | 0.11891 (7) | 0.14320 (18) | 0.0304 (3) | |
C5 | 0.9081 (2) | 0.16847 (7) | 0.22869 (19) | 0.0325 (3) | |
H5 | 1.0545 | 0.1484 | 0.2915 | 0.039* | |
C6 | 0.8685 (2) | 0.24751 (7) | 0.22038 (18) | 0.0307 (3) | |
H6 | 0.9904 | 0.2805 | 0.2768 | 0.037* | |
C7 | 0.5947 (2) | 0.36334 (7) | 0.12527 (16) | 0.0255 (3) |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0407 (6) | 0.0216 (5) | 0.0792 (9) | 0.0012 (4) | −0.0124 (5) | 0.0027 (5) |
O2 | 0.0201 (4) | 0.0278 (5) | 0.0605 (7) | 0.0024 (3) | −0.0032 (4) | 0.0034 (4) |
N1 | 0.0203 (5) | 0.0213 (5) | 0.0574 (7) | 0.0009 (4) | −0.0008 (5) | −0.0007 (5) |
N2 | 0.0305 (6) | 0.0206 (5) | 0.0627 (9) | −0.0015 (4) | −0.0020 (6) | 0.0009 (5) |
C1 | 0.0202 (5) | 0.0231 (5) | 0.0299 (6) | 0.0007 (4) | 0.0011 (4) | 0.0016 (5) |
C2 | 0.0238 (6) | 0.0277 (6) | 0.0372 (7) | −0.0002 (4) | −0.0061 (5) | 0.0024 (5) |
C3 | 0.0299 (6) | 0.0277 (6) | 0.0418 (8) | −0.0046 (5) | −0.0057 (5) | −0.0017 (5) |
C4 | 0.0288 (6) | 0.0208 (6) | 0.0418 (7) | −0.0002 (5) | 0.0037 (5) | 0.0024 (5) |
C5 | 0.0240 (6) | 0.0274 (6) | 0.0450 (8) | 0.0033 (5) | −0.0061 (5) | 0.0045 (5) |
C6 | 0.0238 (6) | 0.0266 (6) | 0.0408 (7) | −0.0009 (5) | −0.0067 (5) | −0.0006 (5) |
C7 | 0.0210 (5) | 0.0241 (6) | 0.0311 (6) | 0.0011 (4) | 0.0004 (4) | 0.0013 (5) |
O1—C4 | 1.3569 (14) | C1—C7 | 1.4824 (16) |
O1—H1A | 0.8200 | C2—C3 | 1.3809 (17) |
O2—C7 | 1.2356 (14) | C2—H2 | 0.9300 |
N1—C7 | 1.3376 (15) | C3—C4 | 1.3866 (18) |
N1—N2 | 1.4113 (15) | C3—H3 | 0.9300 |
N1—H1 | 0.8600 | C4—C5 | 1.3864 (18) |
N2—H12 | 0.89 (2) | C5—C6 | 1.3762 (17) |
N2—H22 | 0.90 (2) | C5—H5 | 0.9300 |
C1—C6 | 1.3870 (17) | C6—H6 | 0.9300 |
C1—C2 | 1.3876 (17) | ||
C4—O1—H1A | 109.5 | C2—C3—H3 | 120.2 |
C7—N1—N2 | 122.18 (10) | C4—C3—H3 | 120.2 |
C7—N1—H1 | 118.9 | O1—C4—C5 | 122.50 (12) |
N2—N1—H1 | 118.9 | O1—C4—C3 | 117.60 (12) |
N1—N2—H12 | 106.3 (11) | C5—C4—C3 | 119.90 (12) |
N1—N2—H22 | 108.1 (11) | C6—C5—C4 | 119.78 (12) |
H12—N2—H22 | 110.4 (17) | C6—C5—H5 | 120.1 |
C6—C1—C2 | 118.52 (11) | C4—C5—H5 | 120.1 |
C6—C1—C7 | 122.35 (11) | C5—C6—C1 | 121.13 (12) |
C2—C1—C7 | 119.05 (11) | C5—C6—H6 | 119.4 |
C3—C2—C1 | 120.98 (12) | C1—C6—H6 | 119.4 |
C3—C2—H2 | 119.5 | O2—C7—N1 | 121.45 (11) |
C1—C2—H2 | 119.5 | O2—C7—C1 | 122.48 (11) |
C2—C3—C4 | 119.68 (12) | N1—C7—C1 | 116.04 (10) |
C6—C1—C2—C3 | −0.8 (2) | C2—C1—C6—C5 | 0.0 (2) |
C7—C1—C2—C3 | −177.79 (12) | C7—C1—C6—C5 | 176.81 (12) |
C1—C2—C3—C4 | 1.0 (2) | N2—N1—C7—O2 | 7.9 (2) |
C2—C3—C4—O1 | 178.80 (12) | N2—N1—C7—C1 | −170.63 (12) |
C2—C3—C4—C5 | −0.2 (2) | C6—C1—C7—O2 | −152.94 (13) |
O1—C4—C5—C6 | −179.61 (13) | C2—C1—C7—O2 | 23.90 (18) |
C3—C4—C5—C6 | −0.6 (2) | C6—C1—C7—N1 | 25.57 (18) |
C4—C5—C6—C1 | 0.8 (2) | C2—C1—C7—N1 | −157.60 (12) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O2i | 0.86 | 2.13 | 2.9243 (14) | 153 |
O1—H1A···N2ii | 0.82 | 1.98 | 2.7852 (16) | 174 |
N2—H12···O1iii | 0.89 (2) | 2.37 (2) | 3.223 (2) | 160 |
N2—H22···O2iv | 0.90 (2) | 2.22 (2) | 3.056 (2) | 155 |
Symmetry codes: (i) x+1, y, z; (ii) −x+2, y−1/2, −z+1/2; (iii) −x+1, y+1/2, −z+1/2; (iv) −x+1, −y+1, −z. |
Experimental details
Crystal data | |
Chemical formula | C7H8N2O2 |
Mr | 152.15 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 296 |
a, b, c (Å) | 5.0587 (2), 17.2149 (9), 7.8178 (5) |
β (°) | 93.489 (2) |
V (Å3) | 679.55 (6) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.11 |
Crystal size (mm) | 0.32 × 0.18 × 0.12 |
Data collection | |
Diffractometer | Bruker Kappa APEX2 CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.965, 0.992 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7324, 1697, 1348 |
Rint | 0.023 |
(sin θ/λ)max (Å−1) | 0.668 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.039, 0.118, 1.06 |
No. of reflections | 1697 |
No. of parameters | 107 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.36, −0.20 |
Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O2i | 0.8600 | 2.129 | 2.9243 (14) | 153 |
O1—H1A···N2ii | 0.8200 | 1.980 | 2.7852 (16) | 174 |
N2—H12···O1iii | 0.89 (2) | 2.37 (2) | 3.223 (2) | 160 |
N2—H22···O2iv | 0.90 (2) | 2.22 (2) | 3.056 (2) | 155 |
Symmetry codes: (i) x+1, y, z; (ii) −x+2, y−1/2, −z+1/2; (iii) −x+1, y+1/2, −z+1/2; (iv) −x+1, −y+1, −z. |
Acknowledgements
The authors thank the Higher Education Commission Pakistan for providing the diffractometer at GCU, Lahore, and Bana International for their support in collecting the crystallographic data.
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.
Hydrazides are known to have different biological activities (Ashiq, Ara et al., 2008; Ara et al., 2007). In order to study the biological activity of 4-hydroxybenzohydrazide, we undertook the synthesis of the title compound, (I), and report its crystal structure in this paper. The title compound was found to be antifungal (Maqsood et al., 2006). The crystal structures of benzhydrazide (Kallel et al., 1992), para-chloro (Saraogi et al., 2002), para-bromo (Ashiq, Jamal et al., 2008), para-iodo (Jamal et al., 2008) and para-methoxy (Ashiq, Jamal et al., 2009) analogues of (I) have already been reported. The structure of (I) is isomorphous with its 3-hydroxy analogue (Hanif et al., 2007).
The molecular structure of (I) has been presented in Fig. 1. The bond distances and bond angles in (I) are similar to the corresponding distances and angles reported in the structures quoted above. In (I), the mean-planes of the benzene ring (C1–C6) and planar hydrazide group (N1/N2/O2/C7) are inclined at 25.75 (6)° with respect to each other. The molecular packing diagram (Fig. 2) shows the presence of four intermolecular hydrogen bonds of the type N—H···O and O—H···N (details are given in Table 1).