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The title compound, C7H5NO4, is essentially planar, with a maximum deviation from the mean plane of 0.0116 (11) Å for the hydr­oxy O atom. The mol­ecular and crystal structure are stabilized by intra- and inter­molecular inter­actions. An intra­molecular O—H...O hydrogen bond generates a six-membered ring, producing an S(6) ring motif. The C—H...O inter­actions result in the formation of C(5) chains and R22(8) rings forming an approximately planar network parallel to (10\overline{1}). These planes are inter­connected through π–π inter­actions [centroid–centroid distance 3.582 (2) Å].

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536809046807/dn2510sup1.cif
Contains datablocks I, global

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S1600536809046807/dn2510Isup2.hkl
Contains datablock I

CCDC reference: 758268

Key indicators

  • Single-crystal X-ray study
  • T = 296 K
  • Mean [sigma](C-C) = 0.003 Å
  • R factor = 0.050
  • wR factor = 0.119
  • Data-to-parameter ratio = 12.5

checkCIF/PLATON results

No syntax errors found



Alert level C PLAT911_ALERT_3_C Missing # FCF Refl Between THmin & STh/L= 0.600 2 PLAT913_ALERT_3_C Missing # of Very Strong Reflections in FCF .... 1
Alert level G PLAT128_ALERT_4_G Non-standard setting of Space-group P21/c .... P21/n
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 2 ALERT level C = Check and explain 1 ALERT level G = General alerts; check 0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 0 ALERT type 2 Indicator that the structure model may be wrong or deficient 2 ALERT type 3 Indicator that the structure quality may be low 1 ALERT type 4 Improvement, methodology, query or suggestion 0 ALERT type 5 Informative message, check

Comment top

Nitroaromatics are widely used either as materials or as intermediates in explosives, dyestuffs, pesticides and organic synthesis (Yan et al., 2006). Nitroaromatics occur as industrial wastes and direct pollutants in the environment, and are relatively soluble in water and detectable in rivers, ponds and soil (Yan et al., 2006; Soojhawon et al., 2005). Morover, aromatic compounds with multiple nitro substituents are known to be resistant to electrophilic attack by oxygenases (Halas et al., 1983).

In the title compound (I, Fig. 1), the molecule is essentially planar with a maximum deviation from the mean plane of 0.0116 (11) Å for atom O3. The bond lengths and angles in (I) have normal values, and are comparable with those in the related structures (Rizal et al., 2008; Garden et al., 2004). The dihedral angle between the aromatic ring and the nitro group is 3.83 (3)°.

An intramolecular O3-H33···O4 interaction (Table 1, and Fig. 1) generates an S(6) ring motif (Bernstein et al., 1995). In the crystal structure, the molecules are linked by intermolecular C2-H2···O4, C6-H6···O3 and C7-H7···O7 interactions into a three-dimensional framework. The C-H···O interactions result in the formation of C(5) chain but also R22(8) ring forming an approximately planar network parallel to the (1 0 -1) plane (Fig. 2). These planes are interconnected through π-π interaction which occurs between Cg1 (the centroid of the C1-C6 ring) and its symmetry equivalent at (-x,-y,-z), with a centroid-to-centroid distance of 3.582 (2) Å, a plane-to-plane separation of 3.367 (1) Å and a slippage of 1.22 Å.

Related literature top

Nitroaromatics are widely used as intermediates in explosives, dyestuffs, pesticides and organic synthesis, see: Yan et al. (2006). They occur in industrial wastes and as direct pollutants in the environment and are relatively soluble in water and detectable in rivers, ponds and soil, see: Yan et al. (2006); Soojhawon et al. (2005). Aromatic compounds with multiple nitro substituents are known to be resistant to electrophilic attack by oxygenases, see: Halas et al. (1983). For comparison bond lengths and angles in related structures, see: Rizal et al. (2008); Garden et al. (2004). For hydrogen-bond motifs, see: Bernstein et al. (1995).

Experimental top

The commercially available compound (Acros Organics) was recrystallized from ethanol.

Refinement top

C-bound H atoms were positioned geometrically and refined using a riding model, with C—H = 0.93 Å and Uiso(H) = 1.2Ueq(C). The position of the H3A atom was obtained from a difference map of the electron density in the unit-cell and its coordinates were refined freely with Uiso(H) = 1.5Ueq(O) .

Computing details top

Data collection: X-AREA (Stoe & Cie, 2002); cell refinement: X-AREA (Stoe & Cie, 2002); data reduction: X-RED32 (Stoe & Cie, 2002); 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) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999).

Figures top
[Figure 1] Fig. 1. The molecular structure of the title compound, showing the atom-numbering scheme and 50% probability diplacement ellipsoids. H atoms are represented as small spheres of arbitrary radii.
[Figure 2] Fig. 2. Partial packing view showing the formation of C-H···O hydrogen bonds represented as dashed lines. H atoms not involved in hydrogen bondings have been omitted for clarity. [Symmetry codes: (i) x, y-1, z; (ii) x+1/2, -y+1/2, z+1/2; (iii) x, y+1, z ]
2-Hydroxy-5-nitrobenzaldehyde top
Crystal data top
C7H5NO4F(000) = 344
Mr = 167.12Dx = 1.563 Mg m3
Monoclinic, P21/nMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ynCell parameters from 8368 reflections
a = 7.2580 (17) Åθ = 1.8–27.3°
b = 8.3960 (13) ŵ = 0.13 mm1
c = 11.704 (3) ÅT = 296 K
β = 95.165 (18)°Prism., red
V = 710.3 (3) Å30.54 × 0.28 × 0.15 mm
Z = 4
Data collection top
Stoe IPDS II
diffractometer
1396 independent reflections
Radiation source: fine-focus sealed tube944 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.062
Detector resolution: 6.67 pixels mm-1θmax = 26.0°, θmin = 3.0°
rotation method scansh = 88
Absorption correction: integration
(X-RED32; Stoe & Cie, 2002)
k = 1010
Tmin = 0.979, Tmax = 0.992l = 1414
4345 measured reflections
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.050Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.119H atoms treated by a mixture of independent and constrained refinement
S = 1.06 w = 1/[σ2(Fo2) + (0.05P)2 + 0.0581P]
where P = (Fo2 + 2Fc2)/3
1396 reflections(Δ/σ)max < 0.001
112 parametersΔρmax = 0.16 e Å3
0 restraintsΔρmin = 0.15 e Å3
Crystal data top
C7H5NO4V = 710.3 (3) Å3
Mr = 167.12Z = 4
Monoclinic, P21/nMo Kα radiation
a = 7.2580 (17) ŵ = 0.13 mm1
b = 8.3960 (13) ÅT = 296 K
c = 11.704 (3) Å0.54 × 0.28 × 0.15 mm
β = 95.165 (18)°
Data collection top
Stoe IPDS II
diffractometer
1396 independent reflections
Absorption correction: integration
(X-RED32; Stoe & Cie, 2002)
944 reflections with I > 2σ(I)
Tmin = 0.979, Tmax = 0.992Rint = 0.062
4345 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0500 restraints
wR(F2) = 0.119H atoms treated by a mixture of independent and constrained refinement
S = 1.06Δρmax = 0.16 e Å3
1396 reflectionsΔρmin = 0.15 e Å3
112 parameters
Special details top

Experimental. 168 frames, detector distance = 120 mm

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 > 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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
O10.4340 (3)0.1006 (2)0.25586 (14)0.0788 (6)
O20.3658 (3)0.3022 (2)0.15003 (16)0.0819 (6)
O30.1019 (3)0.2346 (2)0.19209 (14)0.0702 (6)
H3A0.130 (4)0.336 (4)0.162 (3)0.105*
O40.2251 (3)0.4736 (2)0.06415 (16)0.0895 (7)
N10.3709 (3)0.1591 (2)0.16564 (16)0.0524 (5)
C10.3019 (3)0.0545 (2)0.07198 (17)0.0425 (5)
C20.2232 (3)0.1209 (2)0.03011 (17)0.0459 (5)
H20.21540.23090.03850.055*
C30.1574 (3)0.0228 (3)0.11799 (18)0.0494 (5)
H30.10370.06590.18630.059*
C40.1711 (3)0.1417 (2)0.10464 (18)0.0471 (5)
C50.2551 (3)0.2073 (2)0.00295 (17)0.0437 (5)
C60.3190 (3)0.1067 (2)0.08585 (17)0.0431 (5)
H60.37300.14850.15440.052*
C70.2771 (3)0.3784 (3)0.0104 (2)0.0631 (7)
H70.33380.41720.07920.076*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O10.1123 (15)0.0673 (12)0.0522 (10)0.0024 (11)0.0171 (10)0.0069 (9)
O20.1202 (16)0.0391 (10)0.0829 (13)0.0026 (9)0.0101 (11)0.0101 (8)
O30.0914 (13)0.0556 (11)0.0590 (11)0.0048 (9)0.0195 (9)0.0061 (8)
O40.1338 (17)0.0423 (10)0.0871 (14)0.0022 (11)0.0199 (12)0.0094 (9)
N10.0593 (11)0.0433 (12)0.0547 (11)0.0005 (9)0.0047 (9)0.0071 (9)
C10.0418 (11)0.0382 (12)0.0475 (12)0.0002 (9)0.0041 (9)0.0023 (9)
C20.0486 (12)0.0355 (10)0.0535 (12)0.0007 (9)0.0046 (9)0.0025 (9)
C30.0526 (12)0.0492 (13)0.0453 (12)0.0032 (10)0.0013 (9)0.0086 (10)
C40.0463 (11)0.0458 (13)0.0480 (12)0.0029 (9)0.0018 (9)0.0028 (10)
C50.0468 (11)0.0366 (11)0.0470 (12)0.0014 (9)0.0007 (9)0.0008 (9)
C60.0457 (11)0.0418 (12)0.0413 (11)0.0031 (9)0.0009 (9)0.0049 (9)
C70.0805 (17)0.0424 (13)0.0643 (15)0.0020 (12)0.0045 (12)0.0008 (12)
Geometric parameters (Å, º) top
O1—N11.216 (2)C2—H20.9300
O2—N11.215 (2)C3—C41.392 (3)
O3—C41.348 (2)C3—H30.9300
O3—H3A0.93 (3)C4—C51.401 (3)
O4—C71.218 (3)C5—C61.386 (3)
N1—C11.458 (3)C5—C71.452 (3)
C1—C61.367 (3)C6—H60.9300
C1—C21.394 (3)C7—H70.9300
C2—C31.370 (3)
C4—O3—H3A100.5 (19)O3—C4—C3118.12 (19)
O2—N1—O1122.27 (19)O3—C4—C5121.43 (19)
O2—N1—C1118.59 (19)C3—C4—C5120.45 (19)
O1—N1—C1119.13 (18)C6—C5—C4119.19 (18)
C6—C1—C2121.56 (19)C6—C5—C7119.77 (19)
C6—C1—N1119.05 (18)C4—C5—C7121.04 (19)
C2—C1—N1119.38 (18)C1—C6—C5119.59 (19)
C3—C2—C1119.5 (2)C1—C6—H6120.2
C3—C2—H2120.3C5—C6—H6120.2
C1—C2—H2120.3O4—C7—C5123.3 (2)
C2—C3—C4119.71 (19)O4—C7—H7118.4
C2—C3—H3120.1C5—C7—H7118.4
C4—C3—H3120.1
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
C2—H2···O4i0.932.503.427 (3)175
C6—H6···O3ii0.932.533.433 (3)163
C7—H7···O2iii0.932.503.176 (3)130
O3—H3A···O40.93 (3)1.73 (3)2.613 (3)157 (3)
Symmetry codes: (i) x, y1, z; (ii) x+1/2, y+1/2, z+1/2; (iii) x, y+1, z.

Experimental details

Crystal data
Chemical formulaC7H5NO4
Mr167.12
Crystal system, space groupMonoclinic, P21/n
Temperature (K)296
a, b, c (Å)7.2580 (17), 8.3960 (13), 11.704 (3)
β (°) 95.165 (18)
V3)710.3 (3)
Z4
Radiation typeMo Kα
µ (mm1)0.13
Crystal size (mm)0.54 × 0.28 × 0.15
Data collection
DiffractometerStoe IPDS II
diffractometer
Absorption correctionIntegration
(X-RED32; Stoe & Cie, 2002)
Tmin, Tmax0.979, 0.992
No. of measured, independent and
observed [I > 2σ(I)] reflections
4345, 1396, 944
Rint0.062
(sin θ/λ)max1)0.617
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.050, 0.119, 1.06
No. of reflections1396
No. of parameters112
H-atom treatmentH atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å3)0.16, 0.15

Computer programs: X-AREA (Stoe & Cie, 2002), X-RED32 (Stoe & Cie, 2002), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2009), WinGX (Farrugia, 1999).

Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
C2—H2···O4i0.932.503.427 (3)174.8
C6—H6···O3ii0.932.533.433 (3)163.2
C7—H7···O2iii0.932.503.176 (3)129.6
O3—H3A···O40.93 (3)1.73 (3)2.613 (3)157 (3)
Symmetry codes: (i) x, y1, z; (ii) x+1/2, y+1/2, z+1/2; (iii) x, y+1, z.
 

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