organic compounds
4-Cyanopyridinium nitrate
aCollege of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, People's Republic of China
*Correspondence e-mail: chenxinyuanseu@yahoo.com.cn
The title compound, C6H5N2+·NO3−, is a proton-transfer compound between 4-cyanopyridine and nitric acid. In the the components are linked by a strong N—H⋯O hydrogen bond. In the crystal, molecules are linked into a C(6) chain along [010] by C—H⋯O interactions.
Related literature
For the structures and ferroelectric properties of related compounds, see: Fu et al. (2011a,b,c); Dai & Chen (2011); Xu et al. (2011); Zheng (2011). For graph-set motif see: Bernstein et al. (1995).
Experimental
Crystal data
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Refinement
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Data collection: CrystalClear (Rigaku, 2005); cell CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: OLEX2 (Dolomanov et al., 2009); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).
Supporting information
10.1107/S1600536812020697/bx2407sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812020697/bx2407Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812020697/bx2407Isup3.cml
The HNO3 (5 mL), isonicotinonitrile (20 mmol) and ethanol (50 mL) were added into a 100mL flask. The mixture was stirred at 60oC for 2 h, and then the precipitate was filtrated out. Colourless crystals suitable for X-ray diffraction were obtained by slow evaporation of the solution.
All the H atoms attached to C atoms were situated into the idealized positions and treated as riding with C–H = 0.93 Å (aromatic) with Uiso(H)=1.2Ueq(C). The positional parameters of the H atom (N) was refined freely and in the last stage of the
it was restrained with the N—H = 0.90Å, with Uiso(H)=1.2Ueq(N).Data collection: CrystalClear (Rigaku, 2005); cell
CrystalClear (Rigaku, 2005); data reduction: CrystalClear (Rigaku, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: OLEX2 (Dolomanov et al., 2009); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).C6H5N2+·NO3− | F(000) = 344 |
Mr = 167.13 | Dx = 1.484 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 1694 reflections |
a = 6.3663 (2) Å | θ = 2.8–27.5° |
b = 13.2868 (9) Å | µ = 0.12 mm−1 |
c = 9.1019 (2) Å | T = 298 K |
β = 103.755 (1)° | Block, colourless |
V = 747.83 (6) Å3 | 0.10 × 0.05 × 0.05 mm |
Z = 4 |
Rigaku Mercury2 diffractometer | 1694 independent reflections |
Radiation source: fine-focus sealed tube | 1349 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.031 |
Detector resolution: 13.6612 pixels mm-1 | θmax = 27.5°, θmin = 2.8° |
CCD profile fitting scans | h = −8→7 |
Absorption correction: multi-scan (CrystalClear; Rigaku, 2005) | k = −17→15 |
Tmin = 0.910, Tmax = 1.000 | l = −11→11 |
5151 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)] = 0.050 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.146 | H-atom parameters constrained |
S = 1.14 | w = 1/[σ2(Fo2) + (0.0719P)2 + 0.0927P] where P = (Fo2 + 2Fc2)/3 |
1694 reflections | (Δ/σ)max < 0.001 |
109 parameters | Δρmax = 0.23 e Å−3 |
1 restraint | Δρmin = −0.19 e Å−3 |
C6H5N2+·NO3− | V = 747.83 (6) Å3 |
Mr = 167.13 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 6.3663 (2) Å | µ = 0.12 mm−1 |
b = 13.2868 (9) Å | T = 298 K |
c = 9.1019 (2) Å | 0.10 × 0.05 × 0.05 mm |
β = 103.755 (1)° |
Rigaku Mercury2 diffractometer | 1694 independent reflections |
Absorption correction: multi-scan (CrystalClear; Rigaku, 2005) | 1349 reflections with I > 2σ(I) |
Tmin = 0.910, Tmax = 1.000 | Rint = 0.031 |
5151 measured reflections |
R[F2 > 2σ(F2)] = 0.050 | 1 restraint |
wR(F2) = 0.146 | H-atom parameters constrained |
S = 1.14 | Δρmax = 0.23 e Å−3 |
1694 reflections | Δρmin = −0.19 e Å−3 |
109 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 | ||
O3 | 0.7551 (2) | 0.46541 (8) | 0.20815 (14) | 0.0477 (4) | |
N3 | 0.7428 (2) | 0.42233 (11) | 0.08092 (16) | 0.0447 (4) | |
N1 | 0.7453 (2) | 0.66359 (10) | 0.17652 (16) | 0.0440 (4) | |
H1 | 0.7413 | 0.5962 | 0.1860 | 0.053* | |
C3 | 0.7627 (3) | 0.86509 (12) | 0.13720 (18) | 0.0400 (4) | |
N2 | 0.7637 (3) | 1.05763 (13) | 0.0946 (2) | 0.0648 (5) | |
C4 | 0.6008 (3) | 0.82380 (12) | 0.1963 (2) | 0.0456 (4) | |
H4A | 0.4974 | 0.8648 | 0.2230 | 0.055* | |
O2 | 0.7350 (2) | 0.32899 (10) | 0.07536 (16) | 0.0631 (4) | |
C2 | 0.9185 (3) | 0.80337 (13) | 0.0992 (2) | 0.0455 (4) | |
H2A | 1.0287 | 0.8304 | 0.0603 | 0.055* | |
C5 | 0.5955 (3) | 0.72140 (13) | 0.2149 (2) | 0.0466 (4) | |
H5A | 0.4877 | 0.6924 | 0.2543 | 0.056* | |
O1 | 0.7392 (3) | 0.47362 (11) | −0.03265 (17) | 0.0684 (5) | |
C1 | 0.9049 (3) | 0.70149 (13) | 0.1208 (2) | 0.0474 (4) | |
H1A | 1.0073 | 0.6587 | 0.0966 | 0.057* | |
C6 | 0.7672 (3) | 0.97304 (14) | 0.1142 (2) | 0.0484 (5) |
U11 | U22 | U33 | U12 | U13 | U23 | |
O3 | 0.0566 (8) | 0.0384 (6) | 0.0478 (7) | −0.0022 (5) | 0.0118 (6) | −0.0026 (5) |
N3 | 0.0376 (8) | 0.0469 (8) | 0.0511 (9) | 0.0017 (6) | 0.0136 (6) | −0.0006 (6) |
N1 | 0.0483 (8) | 0.0339 (7) | 0.0491 (8) | −0.0012 (6) | 0.0102 (6) | 0.0000 (6) |
C3 | 0.0417 (9) | 0.0359 (8) | 0.0399 (8) | −0.0008 (6) | 0.0047 (6) | 0.0005 (6) |
N2 | 0.0756 (13) | 0.0408 (9) | 0.0743 (12) | −0.0017 (8) | 0.0107 (10) | 0.0084 (7) |
C4 | 0.0448 (9) | 0.0431 (9) | 0.0513 (10) | 0.0059 (7) | 0.0165 (8) | 0.0003 (7) |
O2 | 0.0760 (10) | 0.0423 (8) | 0.0727 (10) | −0.0014 (6) | 0.0211 (8) | −0.0115 (6) |
C2 | 0.0419 (9) | 0.0464 (9) | 0.0506 (10) | −0.0030 (7) | 0.0157 (7) | 0.0009 (7) |
C5 | 0.0448 (10) | 0.0457 (10) | 0.0513 (10) | −0.0031 (8) | 0.0153 (8) | 0.0032 (7) |
O1 | 0.0877 (11) | 0.0705 (10) | 0.0542 (8) | 0.0080 (8) | 0.0313 (7) | 0.0124 (7) |
C1 | 0.0466 (10) | 0.0447 (9) | 0.0527 (10) | 0.0046 (8) | 0.0155 (8) | −0.0042 (7) |
C6 | 0.0504 (11) | 0.0429 (10) | 0.0495 (9) | −0.0015 (7) | 0.0071 (8) | 0.0018 (7) |
O3—N3 | 1.2774 (18) | C3—C6 | 1.451 (2) |
N3—O1 | 1.234 (2) | N2—C6 | 1.137 (2) |
N3—O2 | 1.2418 (19) | C4—C5 | 1.373 (2) |
N1—C5 | 1.334 (2) | C4—H4A | 0.9300 |
N1—C1 | 1.337 (2) | C2—C1 | 1.374 (2) |
N1—H1 | 0.9005 | C2—H2A | 0.9300 |
C3—C4 | 1.385 (2) | C5—H5A | 0.9300 |
C3—C2 | 1.392 (2) | C1—H1A | 0.9300 |
O1—N3—O2 | 121.67 (16) | C3—C4—H4A | 120.6 |
O1—N3—O3 | 119.80 (15) | C1—C2—C3 | 118.17 (15) |
O2—N3—O3 | 118.53 (14) | C1—C2—H2A | 120.9 |
C5—N1—C1 | 122.52 (15) | C3—C2—H2A | 120.9 |
C5—N1—H1 | 120.6 | N1—C5—C4 | 119.88 (16) |
C1—N1—H1 | 116.9 | N1—C5—H5A | 120.1 |
C4—C3—C2 | 120.22 (15) | C4—C5—H5A | 120.1 |
C4—C3—C6 | 119.33 (15) | N1—C1—C2 | 120.31 (16) |
C2—C3—C6 | 120.44 (15) | N1—C1—H1A | 119.8 |
C5—C4—C3 | 118.89 (15) | C2—C1—H1A | 119.8 |
C5—C4—H4A | 120.6 | N2—C6—C3 | 177.8 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O3 | 0.90 | 1.75 | 2.6481 (18) | 176 |
C4—H4A···O3i | 0.93 | 2.29 | 3.220 (2) | 179 |
Symmetry code: (i) −x+1, y+1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C6H5N2+·NO3− |
Mr | 167.13 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 298 |
a, b, c (Å) | 6.3663 (2), 13.2868 (9), 9.1019 (2) |
β (°) | 103.755 (1) |
V (Å3) | 747.83 (6) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.12 |
Crystal size (mm) | 0.10 × 0.05 × 0.05 |
Data collection | |
Diffractometer | Rigaku Mercury2 diffractometer |
Absorption correction | Multi-scan (CrystalClear; Rigaku, 2005) |
Tmin, Tmax | 0.910, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5151, 1694, 1349 |
Rint | 0.031 |
(sin θ/λ)max (Å−1) | 0.649 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.050, 0.146, 1.14 |
No. of reflections | 1694 |
No. of parameters | 109 |
No. of restraints | 1 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.23, −0.19 |
Computer programs: CrystalClear (Rigaku, 2005), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), OLEX2 (Dolomanov et al., 2009), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O3 | 0.90 | 1.75 | 2.6481 (18) | 175.6 |
C4—H4A···O3i | 0.93 | 2.29 | 3.220 (2) | 179 |
Symmetry code: (i) −x+1, y+1/2, −z+1/2. |
Acknowledgements
This work was supported by a start-up grant from Southeast University, China.
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.
Simple organic salts containing strong intermolecular H-bonds have attracted an attention as materials which display ferroelectric-paraelectric phase transitions (Fu et al., 2011a, 2011b, 2011c). With the purpose of obtaining phase transition crystals of organic salts, various organic molecules have been studied and a series of new materials have been prepared (Dai & Chen 2011; Xu, et al. 2011; Zheng 2011). We report here the crystal structure of the title compound. The title compound (C6H5N2)+.NO3- is a proton-transfer compound between 4-cyanopyridine and nitric acid. In the asymmetric unit the components are linked by one strong N—H···O hydrogen bond interaction, Fig 1. In the crystal the molecules are linked into C(6) chain by simple C—H···O interactions along [010] (Bernstein, et al., 1995), (Fig. 2, Table1).