organic compounds
4-(4-Nitrobenzyl)pyridine
aDepartment of Chemistry, The University of Jordan, Amman 11942, Jordan
*Correspondence e-mail: kailani@ju.edu.jo
The title compound, C12H10N2O2, has a twisted conformation, with a dihedral angle between the planes of the pyridine and benzene rings of 78.4 (2)°. The nitro group is coplanar with the attached benzene ring within experimental error. The molecules form centrosymmetric dimers via Car—H⋯O interactions (H⋯O = 2.49 Å) and the dimers are π-stacked along the b axis [the separation between ring centroids is 3.788 (2) Å].
Related literature
For adducts of the title compound with different organic acids, see: Smith et al. (1997); Smith & Wermuth (2010, 2013). For a zinc complex of the title compound, see: Smith et al. (2011). For the analysis of π-stacking interactions, see: Dolomanov et al. (2009).
Experimental
Crystal data
|
Data collection: CrysAlis PRO (Agilent, 2011); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).
Supporting information
https://doi.org/10.1107/S1600536813017145/ld2106sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536813017145/ld2106Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536813017145/ld2106Isup3.cml
Crystals of the title compound were obtained by dissolving 1 mmol of 4-(4-nitrobenzyl) pyridine in 30 ml of hot 96% ethanol. Partial evaporation of the hot-filtered solution at room temperature yielded colourless crystals from which a block section was cleaved for the X-ray analysis.
The structure was solved by
and refined by least squares method on F2 using the SHELXTL program package. All atoms were refined anisotropically. Hydrogen atoms were placed at the calculated positions using a riding model with C(aromatic)— H = 0.95 Å and Uiso(H) = 1.2Ueq(C), and with C(aliphatic)—H = 0.98 Å and Uiso(H) = 1.5Ueq(C). details)X-Ray structure of the title compound was never reported before in its non-coordinated form, even though several works have been published on it's pyridiunium salts/adducts. The adducts with carboxilic acids were reported for 4-aminobenzoic (Smith et al., 1997) and 5-nitrosalicylic acid (Smith & Wermuth, 2010). Recently, a structure of an adduct with 3-carboxy-4-hydroxybenzenesulfonic acid was also determined (Smith & Wermuth, 2013). The structures of the adducts are dominated by N(pyridine)—H···O hydrogen bonding interactions. In addition, X-ray structure of a zinc complex of the title compound (Diiodidobis[4-(4-nitrobenzyl)pyridine-κN1]zinc) has also been determined (Smith et al., 2011).
The title compound (Fig. 1) gives colorless crystals. The angle between the planes of benzene and pyridine rings is 78.43° and the nitro group is coplanar with the benzene ring. The two aromatic planes are twisted relative to each other, which result in reduction of molecular symmetry from Cs to C1: the dihedral angle C2—C3···C7—C8 is 30.5 (2)°. Two molecular units of the title compound inter-associate through duplex C9—H···O2 hydrogen bonds to form a cyclic dimer (Fig. 2 and Table 1). Then, these dimers are stacked via π···π interactions between benzene rings to form ribbon structure extending parallel to b-axis (Fig. 3); the angle between the two planes, centroid-centroid distance and shift distance are 0°, 3.788 Å and 1.613 Å, respectively, as determined by Olex2 program package (Dolomanov et al., 2009). Subsequently, these ribbons are interdigitated to form the final three-dimensional structure (Fig. 4).
The nitro group of the title compound, was found to be a major factor in determining the interactions in the crystal form, unlike in the previously published structures where the pyridinic nitrogen was the main driving force for amolecular association.
For adducts of the title compound with different organic acids, see: Smith et al. (1997); Smith & Wermuth (2010, 2013). For a zinc complex of the title compound, see: Smith et al. (2011). For the analysis of π-stacking interactions, see: Dolomanov et al. (2009).
Data collection: CrysAlis PRO (Agilent, 2011); cell
CrysAlis PRO (Agilent, 2011); data reduction: CrysAlis PRO (Agilent, 2011); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).C12H10N2O2 | F(000) = 448 |
Mr = 214.22 | Dx = 1.350 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 949 reflections |
a = 11.4138 (9) Å | θ = 3.3–29.0° |
b = 6.1241 (5) Å | µ = 0.09 mm−1 |
c = 15.5812 (13) Å | T = 293 K |
β = 104.561 (9)° | Needle, white |
V = 1054.13 (15) Å3 | 0.4 × 0.2 × 0.15 mm |
Z = 4 |
Agilent Xcalibur Eos diffractometer | 2136 independent reflections |
Radiation source: Enhance (Mo) X-ray Source | 1514 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.018 |
Detector resolution: 16.0534 pixels mm-1 | θmax = 26.3°, θmin = 3.6° |
ω scans | h = −13→14 |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2011) | k = −7→6 |
Tmin = 0.770, Tmax = 1.000 | l = −19→19 |
4351 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)] = 0.047 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.106 | H-atom parameters constrained |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0401P)2 + 0.1216P] where P = (Fo2 + 2Fc2)/3 |
2136 reflections | (Δ/σ)max < 0.001 |
145 parameters | Δρmax = 0.12 e Å−3 |
0 restraints | Δρmin = −0.15 e Å−3 |
C12H10N2O2 | V = 1054.13 (15) Å3 |
Mr = 214.22 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 11.4138 (9) Å | µ = 0.09 mm−1 |
b = 6.1241 (5) Å | T = 293 K |
c = 15.5812 (13) Å | 0.4 × 0.2 × 0.15 mm |
β = 104.561 (9)° |
Agilent Xcalibur Eos diffractometer | 2136 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2011) | 1514 reflections with I > 2σ(I) |
Tmin = 0.770, Tmax = 1.000 | Rint = 0.018 |
4351 measured reflections |
R[F2 > 2σ(F2)] = 0.047 | 0 restraints |
wR(F2) = 0.106 | H-atom parameters constrained |
S = 1.03 | Δρmax = 0.12 e Å−3 |
2136 reflections | Δρmin = −0.15 e Å−3 |
145 parameters |
Experimental. Absorption correction CrysAlis PRO (Agilent, 2011). Empirical absorption correction using spherical harmonics, implemented in SCALE3 ABSPACK scaling algorithm. |
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 | ||
N2 | 0.13729 (12) | 0.2522 (2) | 0.13717 (9) | 0.0459 (4) | |
C10 | 0.15049 (13) | 0.1215 (2) | 0.06150 (10) | 0.0361 (4) | |
C9 | 0.11079 (14) | 0.2054 (3) | −0.02263 (11) | 0.0413 (4) | |
H9A | 0.0757 | 0.3433 | −0.0317 | 0.050* | |
C7 | 0.17562 (14) | −0.1248 (3) | −0.08069 (10) | 0.0391 (4) | |
O2 | 0.09206 (12) | 0.4333 (2) | 0.12370 (9) | 0.0633 (4) | |
C11 | 0.20080 (14) | −0.0837 (3) | 0.07671 (11) | 0.0410 (4) | |
H11A | 0.2258 | −0.1390 | 0.1340 | 0.049* | |
C8 | 0.12404 (14) | 0.0808 (3) | −0.09329 (11) | 0.0427 (4) | |
H8A | 0.0978 | 0.1361 | −0.1505 | 0.051* | |
C12 | 0.21313 (14) | −0.2047 (3) | 0.00541 (11) | 0.0426 (4) | |
H12A | 0.2473 | −0.3433 | 0.0149 | 0.051* | |
C6 | 0.19074 (15) | −0.2601 (3) | −0.15842 (11) | 0.0496 (5) | |
H6A | 0.1457 | −0.3953 | −0.1607 | 0.059* | |
H6B | 0.1576 | −0.1809 | −0.2130 | 0.059* | |
O1 | 0.17074 (16) | 0.1747 (2) | 0.21073 (9) | 0.0835 (5) | |
C3 | 0.32183 (15) | −0.3119 (3) | −0.15136 (10) | 0.0445 (4) | |
C4 | 0.37349 (17) | −0.5080 (3) | −0.11888 (12) | 0.0555 (5) | |
H4A | 0.3263 | −0.6168 | −0.1028 | 0.067* | |
N1 | 0.56897 (15) | −0.3995 (3) | −0.13144 (12) | 0.0712 (5) | |
C2 | 0.39748 (17) | −0.1617 (3) | −0.17558 (13) | 0.0610 (5) | |
H2A | 0.3676 | −0.0274 | −0.1992 | 0.073* | |
C5 | 0.49444 (19) | −0.5428 (4) | −0.11034 (14) | 0.0670 (6) | |
H5A | 0.5263 | −0.6770 | −0.0881 | 0.080* | |
C1 | 0.51831 (19) | −0.2128 (4) | −0.16440 (15) | 0.0731 (6) | |
H1B | 0.5676 | −0.1088 | −0.1812 | 0.088* |
U11 | U22 | U33 | U12 | U13 | U23 | |
N2 | 0.0485 (9) | 0.0470 (9) | 0.0436 (9) | 0.0015 (7) | 0.0142 (7) | −0.0001 (7) |
C10 | 0.0327 (8) | 0.0392 (9) | 0.0376 (9) | −0.0024 (7) | 0.0108 (7) | 0.0001 (7) |
C9 | 0.0387 (9) | 0.0401 (9) | 0.0448 (10) | 0.0031 (7) | 0.0098 (8) | 0.0074 (8) |
C7 | 0.0308 (8) | 0.0477 (10) | 0.0398 (9) | −0.0043 (7) | 0.0104 (7) | −0.0016 (8) |
O2 | 0.0808 (10) | 0.0477 (8) | 0.0618 (9) | 0.0179 (7) | 0.0189 (7) | −0.0018 (7) |
C11 | 0.0430 (9) | 0.0428 (9) | 0.0363 (9) | 0.0032 (8) | 0.0086 (8) | 0.0070 (8) |
C8 | 0.0424 (9) | 0.0498 (10) | 0.0350 (9) | −0.0003 (8) | 0.0082 (8) | 0.0064 (8) |
C12 | 0.0396 (9) | 0.0385 (9) | 0.0494 (10) | 0.0037 (7) | 0.0109 (8) | 0.0026 (8) |
C6 | 0.0413 (10) | 0.0621 (11) | 0.0455 (10) | −0.0024 (8) | 0.0113 (8) | −0.0088 (9) |
O1 | 0.1380 (14) | 0.0749 (10) | 0.0378 (8) | 0.0326 (10) | 0.0224 (8) | 0.0078 (7) |
C3 | 0.0436 (9) | 0.0551 (11) | 0.0361 (9) | −0.0042 (9) | 0.0126 (8) | −0.0120 (8) |
C4 | 0.0519 (11) | 0.0561 (11) | 0.0601 (12) | −0.0023 (9) | 0.0172 (10) | −0.0061 (10) |
N1 | 0.0481 (10) | 0.0950 (14) | 0.0719 (12) | 0.0042 (10) | 0.0176 (9) | −0.0145 (11) |
C2 | 0.0540 (12) | 0.0668 (13) | 0.0653 (13) | −0.0035 (10) | 0.0211 (10) | 0.0019 (11) |
C5 | 0.0585 (13) | 0.0708 (14) | 0.0692 (14) | 0.0117 (12) | 0.0114 (11) | −0.0119 (11) |
C1 | 0.0535 (13) | 0.0956 (17) | 0.0759 (15) | −0.0169 (13) | 0.0271 (12) | −0.0053 (14) |
N2—O1 | 1.2101 (17) | C6—C3 | 1.506 (2) |
N2—O2 | 1.2194 (17) | C6—H6A | 0.9700 |
N2—C10 | 1.464 (2) | C6—H6B | 0.9700 |
C10—C9 | 1.374 (2) | C3—C4 | 1.377 (2) |
C10—C11 | 1.377 (2) | C3—C2 | 1.378 (2) |
C9—C8 | 1.379 (2) | C4—C5 | 1.370 (3) |
C9—H9A | 0.9300 | C4—H4A | 0.9300 |
C7—C8 | 1.383 (2) | N1—C5 | 1.320 (3) |
C7—C12 | 1.391 (2) | N1—C1 | 1.325 (3) |
C7—C6 | 1.513 (2) | C2—C1 | 1.382 (3) |
C11—C12 | 1.372 (2) | C2—H2A | 0.9300 |
C11—H11A | 0.9300 | C5—H5A | 0.9300 |
C8—H8A | 0.9300 | C1—H1B | 0.9300 |
C12—H12A | 0.9300 | ||
O1—N2—O2 | 122.59 (15) | C3—C6—H6A | 109.3 |
O1—N2—C10 | 118.47 (14) | C7—C6—H6A | 109.3 |
O2—N2—C10 | 118.93 (14) | C3—C6—H6B | 109.3 |
C9—C10—C11 | 121.90 (15) | C7—C6—H6B | 109.3 |
C9—C10—N2 | 119.20 (14) | H6A—C6—H6B | 108.0 |
C11—C10—N2 | 118.89 (14) | C4—C3—C2 | 116.31 (17) |
C10—C9—C8 | 118.60 (15) | C4—C3—C6 | 122.41 (16) |
C10—C9—H9A | 120.7 | C2—C3—C6 | 121.27 (17) |
C8—C9—H9A | 120.7 | C5—C4—C3 | 119.94 (18) |
C8—C7—C12 | 118.32 (15) | C5—C4—H4A | 120.0 |
C8—C7—C6 | 121.02 (15) | C3—C4—H4A | 120.0 |
C12—C7—C6 | 120.66 (15) | C5—N1—C1 | 115.11 (18) |
C12—C11—C10 | 118.48 (15) | C3—C2—C1 | 119.2 (2) |
C12—C11—H11A | 120.8 | C3—C2—H2A | 120.4 |
C10—C11—H11A | 120.8 | C1—C2—H2A | 120.4 |
C9—C8—C7 | 121.25 (15) | N1—C5—C4 | 124.7 (2) |
C9—C8—H8A | 119.4 | N1—C5—H5A | 117.6 |
C7—C8—H8A | 119.4 | C4—C5—H5A | 117.6 |
C11—C12—C7 | 121.44 (15) | N1—C1—C2 | 124.7 (2) |
C11—C12—H12A | 119.3 | N1—C1—H1B | 117.7 |
C7—C12—H12A | 119.3 | C2—C1—H1B | 117.7 |
C3—C6—C7 | 111.59 (13) | ||
O1—N2—C10—C9 | 178.75 (15) | C6—C7—C12—C11 | 179.59 (14) |
O2—N2—C10—C9 | −0.5 (2) | C8—C7—C6—C3 | 119.47 (17) |
O1—N2—C10—C11 | −0.3 (2) | C12—C7—C6—C3 | −60.7 (2) |
O2—N2—C10—C11 | −179.55 (15) | C7—C6—C3—C4 | 98.12 (19) |
C11—C10—C9—C8 | −1.2 (2) | C7—C6—C3—C2 | −80.4 (2) |
N2—C10—C9—C8 | 179.84 (13) | C2—C3—C4—C5 | 1.5 (3) |
C9—C10—C11—C12 | 1.2 (2) | C6—C3—C4—C5 | −177.18 (16) |
N2—C10—C11—C12 | −179.81 (13) | C4—C3—C2—C1 | −1.4 (3) |
C10—C9—C8—C7 | 0.2 (2) | C6—C3—C2—C1 | 177.24 (17) |
C12—C7—C8—C9 | 0.6 (2) | C1—N1—C5—C4 | −1.2 (3) |
C6—C7—C8—C9 | −179.57 (14) | C3—C4—C5—N1 | −0.1 (3) |
C10—C11—C12—C7 | −0.3 (2) | C5—N1—C1—C2 | 1.3 (3) |
C8—C7—C12—C11 | −0.6 (2) | C3—C2—C1—N1 | 0.0 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
C9—H9A···O2i | 0.93 | 2.49 | 3.302 (2) | 146 |
Symmetry code: (i) −x, −y+1, −z. |
Experimental details
Crystal data | |
Chemical formula | C12H10N2O2 |
Mr | 214.22 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 293 |
a, b, c (Å) | 11.4138 (9), 6.1241 (5), 15.5812 (13) |
β (°) | 104.561 (9) |
V (Å3) | 1054.13 (15) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.4 × 0.2 × 0.15 |
Data collection | |
Diffractometer | Agilent Xcalibur Eos |
Absorption correction | Multi-scan (CrysAlis PRO; Agilent, 2011) |
Tmin, Tmax | 0.770, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 4351, 2136, 1514 |
Rint | 0.018 |
(sin θ/λ)max (Å−1) | 0.624 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.047, 0.106, 1.03 |
No. of reflections | 2136 |
No. of parameters | 145 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.12, −0.15 |
Computer programs: CrysAlis PRO (Agilent, 2011), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), XP in SHELXTL (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
C9—H9A···O2i | 0.930 | 2.4926 | 3.3018 (20) | 145.57 |
Symmetry code: (i) −x, −y+1, −z. |
Acknowledgements
The authors thank the University of Jordan and Hamdi Mango Center for Scientific Research for providing support and time to collect the single-crystal X-ray diffraction data set.
References
Agilent (2011). CrysAlis PRO. Agilent Technologies, Yarnton, Oxfordshire, England. Google Scholar
Dolomanov, O. V., Bourhis, L. J., Gildea, R. J., Howard, J. A. K. & Puschmann, H. (2009). J. Appl. Cryst. 42, 339–341. Web of Science CrossRef CAS IUCr Journals Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Smith, G., Lynch, D. E., Byriel, K. A. & Kennard, C. H. L. (1997). J. Chem. Crystallogr. 27, 307–317. CrossRef CAS Web of Science Google Scholar
Smith, G. & Wermuth, U. D. (2010). Acta Cryst. E66, o1173. Web of Science CSD CrossRef IUCr Journals Google Scholar
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X-Ray structure of the title compound was never reported before in its non-coordinated form, even though several works have been published on it's pyridiunium salts/adducts. The adducts with carboxilic acids were reported for 4-aminobenzoic (Smith et al., 1997) and 5-nitrosalicylic acid (Smith & Wermuth, 2010). Recently, a structure of an adduct with 3-carboxy-4-hydroxybenzenesulfonic acid was also determined (Smith & Wermuth, 2013). The structures of the adducts are dominated by N(pyridine)—H···O hydrogen bonding interactions. In addition, X-ray structure of a zinc complex of the title compound (Diiodidobis[4-(4-nitrobenzyl)pyridine-κN1]zinc) has also been determined (Smith et al., 2011).
The title compound (Fig. 1) gives colorless crystals. The angle between the planes of benzene and pyridine rings is 78.43° and the nitro group is coplanar with the benzene ring. The two aromatic planes are twisted relative to each other, which result in reduction of molecular symmetry from Cs to C1: the dihedral angle C2—C3···C7—C8 is 30.5 (2)°. Two molecular units of the title compound inter-associate through duplex C9—H···O2 hydrogen bonds to form a cyclic dimer (Fig. 2 and Table 1). Then, these dimers are stacked via π···π interactions between benzene rings to form ribbon structure extending parallel to b-axis (Fig. 3); the angle between the two planes, centroid-centroid distance and shift distance are 0°, 3.788 Å and 1.613 Å, respectively, as determined by Olex2 program package (Dolomanov et al., 2009). Subsequently, these ribbons are interdigitated to form the final three-dimensional structure (Fig. 4).
The nitro group of the title compound, was found to be a major factor in determining the interactions in the crystal form, unlike in the previously published structures where the pyridinic nitrogen was the main driving force for amolecular association.