2-Amino-3-carb­­oxy­pyridinium nitrate

In the crystal structure of the title compound, C₆H₇N₂O₂⁺·NO₃⁻, the cations are linked via C—H⋯O hydrogen bonds, forming infinite chains running along the b axis. These chains are further linked through N—H⋯O, O—H⋯O and C—H⋯O hydrogen bonds to the nitrate anions, forming well-separated infinite planar layers parallel to (001).

Related literature

For hybrid compounds based on nicotinic acid, see: Athimoolam et al. (2005); Athimoolam & Rajaram (2005a,b); Chen (2009); Slouf (2001); Ye et al. (2010). For hybrid compounds based on amino-nicotinic acid derivatives, see: Akriche & Rzaigui (2007); Berrah et al. (2011a); Giantsidis & Turnbull (2000). For related nitrate compounds, see: Berrah et al. (2011b); Jebas et al. (2006).

Experimental

Crystal data

• C₆H₇N₂O₂⁺·NO₃⁻

• M_r = 201.15

• Tetragonal, I 4₁ c d

• a = 16.122 (2) Å

• c = 12.446 (3) Å

• V = 3235.0 (11) ų

• Z = 16

• Mo Kα radiation

• μ = 0.15 mm⁻¹

• T = 150 K

• 0.39 × 0.07 × 0.05 mm

Data collection

• Bruker APEXII diffractometer

• Absorption correction: multi-scan (SADABS; Sheldrick, 2002) T_min = 0.476, T_max = 0.993

• 5438 measured reflections

• 1509 independent reflections

• 921 reflections with I > 2σ(I)

• R_int = 0.112

Refinement

• R[F² > 2σ(F²)] = 0.059

• wR(F²) = 0.158

• S = 0.97

• 1509 reflections

• 128 parameters

• 1 restraint

• H-atom parameters constrained

• Δρ_max = 0.41 e Å⁻³

• Δρ_min = −0.28 e Å⁻³

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2⋯O3^i	0.86	1.97	2.803 (4)	162
N3—H3A⋯O2^i	0.86	2.18	3.017 (4)	165
N3—H3A⋯O2^ii	0.86	2.43	2.967 (4)	121
N3—H3B⋯O4	0.86	2.10	2.716 (5)	128
O5—H51⋯O3^iii	0.82	1.85	2.670 (4)	180
C4—H4⋯O1^iv	0.93	2.42	3.197 (6)	141
C5—H5⋯O4^v	0.93	2.30	3.216 (6)	167
Symmetry codes: (i) ; (ii) ; (iii) ; (iv) ; (v) .

Data collection: APEX2 (Bruker, 2006); cell refinement: SAINT (Bruker, 2006); data reduction: SAINT; program(s) used to solve structure: SIR2002 (Burla et al., 2005); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and DIAMOND (Brandenburg & Berndt, 2001); software used to prepare material for publication: WinGX (Farrugia, 1999).

Supporting information

S1. Comment

Crystal structures of hybrid compounds based on nicotinic acid or its amino derivatives and inorganic acids have been reported (Athimoolam et al., 2005; Athimoolam & Rajaram, 2005a, b; Chen, 2009; Giantsidis & Turnbull, 2000; Jebas et al., 2006; Slouf, 2001; Ye et al., 2010) showing interesting structural diversity governed mainly by hydrogen bonds. Anion substitution seems to have an important influence on hydrogen bound patterns. In attempt to elucidate this influence and as part of our search for new hybrid compounds based on protonated N-hyterocycle, we report in this paper the new structure of 2-aminonicotinium nitrate; its homologues obtained with phosphate and sulfate anions have been described previously (Akriche & Rzaigui, 2007; Berrah et al., 2011a).

The asymmetric unit of the title compound (Fig. 1) contains one cation and one anion with geometry similar to that observed in similar compounds (Akriche & Rzaigui, 2007; Berrah et al., 2011a, b; Jebas et al., 2006). However in this structure, cations do not form dimers via N–H···O hydrogen bonds as observed in the structures obtained with phosphate and sulfate anions but they are linked to each other via C–H···O hydrogen bonds to form infinite chains running along the b axis (Table 1 & Fig. 2,). These chains are further linked, through N–H···O, O–H···O and C–H···O hydrogen contacts, to nitrate anions to form well separated infinite planar layers parallel to (001) (Fig. 3). A such two-dimensional network have been already observed in compounds including nicotinium entities (Giantsidis & Turnbull, 2000; Slouf, 2001; Ye et al., 2010).

Related literature

For hybrid compounds based on nicotinic acid, see: Athimoolam et al. (2005); Athimoolam & Rajaram (2005a,b); Chen (2009); Slouf (2001); Ye et al. (2010). For hybrid compounds based on amino-nicotinic acid derivatives, see: Akriche & Rzaigui (2007); Berrah et al. (2011a); Giantsidis & Turnbull (2000). For related nitrate compounds, see: Berrah et al. (2011b); Jebas et al. (2006).

S2. Experimental

The title compound was synthesized by reacting 3-amino-pyridine-2-carboxylic acid (0.138 mg, 1 mmol) with nitriic acid (1 mmol)in a solution of equal volume of H₂O and CH₃OH. Slow evaporation leads to well crystallized colourless needles.

S3. Refinement

All the Friedel pairs were merged. All non-H atoms were refined with anisotropic atomic displacement parameters. The remaining H atoms were localized on Fourier maps but introduced in calculated positions and treated as riding on their parent atoms (C, N or O) with C–H = 0.93 Å, O–H = 0.82 Å and N–H = 0.86 Å with U_iso(H) = 1.2 U_eq(C or N) and U_iso(H = 1.5 U_eq(O).

Computing details

Data collection: APEX2 (Bruker, 2006); cell refinement: SAINT (Bruker, 2006); data reduction: SAINT (Bruker, 2006); program(s) used to solve structure: SIR2002 (Burla et al., 2005); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and DIAMOND (Brandenburg & Berndt, 2001); software used to prepare material for publication: WinGX (Farrugia, 1999).

Figures

	Fig. 1. The structure of the title compound with the atomic labelling scheme. Displacement are drawn at the 50% probability level.
	Fig. 2. A part of crystal packing showing cationic infinite chains linked to nitrate anions via [N–H···O, O–H···O and C–H···O] hydrogen contacts. Hydrogen bonds are shown as dashed lines. [Symmetry codes: (i) y + 1/2, -x, z - 1/4; (ii) -y + 1/2, x, z - 1/4; (iii) -y, -x + 1/2, z - 1/4; (iv) y, x - 1/2, z - 1/4; (v) -x + 1/2, y - 1/2, z.]
	Fig. 3. Layered packing of the structure viewed down the b axis.

2-Amino-3-carboxypyridinium nitrate

Crystal data

C6H7N2O2^+·NO3^−	Dx = 1.652 Mg m^−3
Mr = 201.15	Mo Kα radiation, λ = 0.71073 Å
Tetragonal, I41cd	Cell parameters from 491 reflections
Hall symbol: I 4bw -2c	θ = 3.3–20.3°
a = 16.122 (2) Å	µ = 0.15 mm^−1
c = 12.446 (3) Å	T = 150 K
V = 3235.0 (11) Å^3	Needle, colourless
Z = 16	0.39 × 0.07 × 0.05 mm
F(000) = 1664

Data collection

Bruker APEXII diffractometer	921 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.112
CCD rotation images, thin slices scans	θmax = 27.5°, θmin = 3.3°
Absorption correction: multi-scan (SADABS; Sheldrick, 2002)	h = −16→20
Tmin = 0.476, Tmax = 0.993	k = −13→20
5438 measured reflections	l = −16→10
1509 independent reflections

Refinement

Refinement on F^2	Primary atom site location: structure-invariant direct methods
Least-squares matrix: full	Secondary atom site location: difference Fourier map
R[F^2 > 2σ(F^2)] = 0.059	Hydrogen site location: difference Fourier map
wR(F^2) = 0.158	H-atom parameters constrained
S = 0.97	w = 1/[σ^2(Fo^2) + (0.076P)^2] where P = (Fo^2 + 2Fc^2)/3
1509 reflections	(Δ/σ)max < 0.001
128 parameters	Δρmax = 0.41 e Å^−3
1 restraint	Δρmin = −0.28 e Å^−3

Special details

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Ų)

	x	y	z	Uiso*/Ueq
C1	0.1754 (3)	0.1137 (3)	0.0309 (6)	0.0288 (11)
C2	0.1875 (3)	0.0223 (2)	0.0276 (6)	0.0229 (10)
C3	0.1218 (3)	−0.0300 (3)	0.0259 (6)	0.0295 (12)
H3	0.0686	−0.0078	0.0264	0.035*
C4	0.1311 (3)	−0.1174 (3)	0.0233 (7)	0.0309 (11)
H4	0.0854	−0.1526	0.0215	0.037*
C5	0.2092 (3)	−0.1469 (3)	0.0235 (7)	0.0302 (12)
H5	0.2179	−0.2039	0.0221	0.036*
C6	0.2702 (2)	−0.0099 (3)	0.0279 (10)	0.0234 (10)
N1	0.1623 (2)	−0.0149 (2)	0.2777 (8)	0.0247 (8)
N2	0.2755 (2)	−0.0950 (2)	0.0256 (5)	0.0269 (9)
H2	0.3242	−0.1168	0.0256	0.032*
N3	0.3388 (2)	0.0327 (2)	0.0312 (5)	0.0308 (10)
H3A	0.3858	0.0075	0.032	0.037*
H3B	0.3371	0.086	0.0326	0.037*
O1	0.20156 (19)	0.05016 (19)	0.2755 (4)	0.0313 (8)
O2	0.08451 (16)	−0.01536 (18)	0.2757 (5)	0.0293 (8)
O3	0.19907 (18)	−0.08530 (18)	0.2798 (5)	0.0309 (8)
O5	0.09671 (19)	0.13575 (18)	0.0242 (4)	0.0342 (9)
H51	0.0932	0.1865	0.0259	0.051*
O4	0.2318 (2)	0.1628 (2)	0.0360 (4)	0.0355 (10)

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
C1	0.035 (3)	0.017 (2)	0.035 (3)	−0.002 (2)	−0.001 (4)	−0.004 (3)
C2	0.020 (2)	0.021 (3)	0.028 (2)	0.0022 (16)	0.001 (3)	0.002 (4)
C3	0.025 (3)	0.021 (2)	0.042 (3)	−0.0068 (19)	0.000 (4)	0.003 (3)
C4	0.042 (3)	0.016 (3)	0.035 (3)	−0.001 (2)	−0.003 (5)	0.000 (3)
C5	0.040 (3)	0.014 (2)	0.036 (3)	−0.014 (2)	−0.004 (4)	−0.001 (4)
C6	0.022 (2)	0.026 (3)	0.022 (2)	−0.0025 (18)	−0.006 (5)	0.003 (3)
N1	0.0198 (18)	0.020 (2)	0.0341 (18)	−0.0058 (16)	0.006 (4)	−0.001 (4)
N2	0.024 (2)	0.022 (2)	0.035 (2)	0.0103 (15)	−0.005 (3)	−0.002 (3)
N3	0.0137 (19)	0.029 (2)	0.050 (2)	−0.0035 (15)	0.003 (3)	0.002 (3)
O1	0.0253 (18)	0.0256 (17)	0.043 (2)	−0.0062 (15)	0.000 (3)	−0.006 (3)
O2	0.0124 (15)	0.0231 (18)	0.052 (2)	0.0030 (13)	0.004 (3)	0.004 (3)
O3	0.0130 (16)	0.0233 (17)	0.056 (2)	0.0049 (13)	−0.002 (3)	−0.007 (3)
O5	0.0233 (17)	0.0205 (19)	0.059 (2)	0.0042 (14)	0.004 (3)	0.000 (3)
O4	0.0253 (19)	0.0212 (18)	0.060 (3)	0.0027 (15)	−0.003 (3)	−0.005 (3)

Geometric parameters (Å, º)

C1—O4	1.207 (6)	C5—H5	0.93
C1—O5	1.319 (6)	C6—N3	1.303 (5)
C1—C2	1.487 (6)	C6—N2	1.375 (6)
C2—C3	1.354 (6)	N1—O1	1.225 (4)
C2—C6	1.431 (5)	N1—O2	1.255 (4)
C3—C4	1.417 (6)	N1—O3	1.281 (4)
C3—H3	0.93	N2—H2	0.86
C4—C5	1.347 (8)	N3—H3A	0.86
C4—H4	0.93	N3—H3B	0.86
C5—N2	1.359 (6)	O5—H51	0.82
O4—C1—O5	123.4 (4)	N2—C5—H5	119.4
O4—C1—C2	123.5 (4)	N3—C6—N2	118.2 (4)
O5—C1—C2	113.0 (4)	N3—C6—C2	126.9 (5)
C3—C2—C6	120.2 (4)	N2—C6—C2	114.8 (4)
C3—C2—C1	121.0 (4)	O1—N1—O2	121.4 (4)
C6—C2—C1	118.8 (4)	O1—N1—O3	121.4 (3)
C2—C3—C4	122.5 (4)	O2—N1—O3	117.2 (3)
C2—C3—H3	118.8	C5—N2—C6	124.5 (4)
C4—C3—H3	118.8	C5—N2—H2	117.8
C5—C4—C3	116.8 (4)	C6—N2—H2	117.8
C5—C4—H4	121.6	C6—N3—H3A	120
C3—C4—H4	121.6	C6—N3—H3B	120
C4—C5—N2	121.2 (4)	H3A—N3—H3B	120
C4—C5—H5	119.4	C1—O5—H51	109.5
O4—C1—C2—C3	177.5 (7)	C3—C2—C6—N3	−178.8 (9)
O5—C1—C2—C3	−4.4 (11)	C1—C2—C6—N3	0.4 (17)
O4—C1—C2—C6	−1.6 (13)	C3—C2—C6—N2	0.3 (14)
O5—C1—C2—C6	176.4 (9)	C1—C2—C6—N2	179.5 (7)
C6—C2—C3—C4	−0.6 (12)	C4—C5—N2—C6	0.0 (14)
C1—C2—C3—C4	−179.7 (7)	N3—C6—N2—C5	179.1 (8)
C2—C3—C4—C5	0.5 (11)	C2—C6—N2—C5	−0.1 (15)
C3—C4—C5—N2	−0.3 (12)

Hydrogen-bond geometry (Å, º)

D—H···A	D—H	H···A	D···A	D—H···A
N2—H2···O3^i	0.86	1.97	2.803 (4)	162
N3—H3A···O2^i	0.86	2.18	3.017 (4)	165
N3—H3A···O2^ii	0.86	2.43	2.967 (4)	121
N3—H3B···O4	0.86	2.10	2.716 (5)	128
O5—H51···O3^iii	0.82	1.85	2.670 (4)	180
C4—H4···O1^iv	0.93	2.42	3.197 (6)	141
C5—H5···O4^v	0.93	2.30	3.216 (6)	167

Symmetry codes: (i) y+1/2, −x, z−1/4; (ii) −y+1/2, x, z−1/4; (iii) −y, −x+1/2, z−1/4; (iv) y, x−1/2, z−1/4; (v) −x+1/2, y−1/2, z.

 

Footnotes

‡Current address: Département Sciences de la Matière, Faculté des Sciences Exactes et Sciences de la Nature et de la Vie, Université Larbi Ben M'hidi, 04000 Oum El Bouaghi, Algeria.