organic compounds
2-Amino-5-methylpyridinium 3-hydroxypyridine-2-carboxylate
aSchool of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, and bDepartment of Physics, Faculty of Science, University of Mazandaran, Babolsar, Iran
*Correspondence e-mail: arazaki@usm.my
In the 3-hydroxypicolinate anion of the title salt, C6H9N2+·C6H4NO3−, an intramolecular O—H⋯O hydrogen bond with an S(6) graph-set motif is formed, so that the anion is essentially planar, with a dihedral angle of 9.55 (9)° between the pyridine ring and the carboxylate group. In the crystal, the cations and anions are linked via N—H⋯O hydrogen bonds, forming a centrosymmetric 2 + 2 aggregate with R22(8) and R42(8) ring motifs. The also features N—H⋯N and weak C—H⋯π interactions.
Related literature
For details of non-covalent interactions, see: Desiraju (2007); Aakeroy & Seddon (1993). For related structures, see: Nahringbauer & Kvick (1977); Robert et al. (2001); Thanigaimani et al. (2010, 2013). For hydrogen-bond motifs, see: Bernstein et al. (1995). For bond-length data, see: Allen et al. (1987). For stability of the temperature controller used for the data collection, see: Cosier & Glazer (1986).
Experimental
Crystal data
|
Data collection: APEX2 (Bruker, 2009); cell SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009).
Supporting information
https://doi.org/10.1107/S1600536813016322/is5281sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536813016322/is5281Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536813016322/is5281Isup3.cml
Hot methanol solutions (20 ml) of 2-amino5-methylpyridine (54 mg, Aldrich) and 3-hydoxypicolinic acid (34 mg, Aldrich) were mixed and warmed over a heating magnetic stirrer hotplate for a few minutes. The resulting solution was allowed to cool slowly at room temperature and crystals of the title compound (I) appeared after a few days.
O- and N-bound H atoms were located in a difference Fourier map and were refined freely [O—H = 0.926 (19) Å and N—H = 0.859 (14)–0.927 (15) Å]. The remaining hydrogen atoms were positioned geometrically (C—H = 0.95–0.98 Å) and were refined using a riding model, with Uiso(H) = 1.2Ueq(C) or 1.5Ueq(methyl C). A rotating group model was used for the methyl group. Five outliers were omitted (2 4 1, 2 1 5, 1 0 2, 3 3 4 and 1 6 0) in the final refinement.
Supramolecular architectures assembled via various delicate noncovalent interactions such as hydrogen bonds, π–π stacking and electrostatic interactions, etc., have attracted intense interest in recent years because of their fascinating structural diversity and potential applications for functional materials (Desiraju, 2007). Especially, the application of intermolecular hydrogen bonds is a well known and efficient tool in the field of organic crystal design owing to its strength and directional properties (Aakeroy & Seddon, 1993). In order to study potential hydrogen bonding interactions, the determination of the title compound (I) was carried out.
The
(Fig. 1) contains one 2-amino-5-methylpyridinium cation and one 3-hydroxypicolinate anion. An intramolecular O1—H1O1···O2 hydrogen bond in the 3-hydroxypicolinate anion generates an S(6) ring motif. (Bernstein et al., 1995). This motif is also observed in the of acetoguanaminium 3-hydroxypicolinate monohydrate (Thanigaimani et al., 2010). The proton transfers from the one of the carboxyl group oxygen atom (O2) to atom N1 of 2-amino-5-methylpyrimidine resulted in the widening of C7—N2—C11 angle of the pyridinium ring to 122.89 (7)°, compared to the corresponding angle of 117.4 (3)° in neutral 2-amino-5-methylpyridine (Nahringbauer & Kvick, 1977). The 2-amino-5-methylpyridinium cation is essentially planar, with a maximum deviation of 0.011 (1) Å for atom C9. The bond lengths (Allen et al., 1987) and angles are normal.In the crystal packing (Fig. 2), the protonated N2 atom and a nitrogen atom of the 2-amino group (N3) are hydrogen-bonded to the carboxylate oxygen atoms (O2 and O3) via a pair of intramolecular N2—H1N2···O2i and N3—H2N3···O3i hydrogen bonds (symmetry code in Table 1), forming a ring motif R22(8) (Bernstein et al., 1995). These motifs are linked by N3—H1N3···O3ii hydrogen bonds (symmetry code in Table 1), forming a ring spanning the centre of symmetry at (1, -3/2, 1/2) to produce a DDAA array (where D is a hydrogen-bond donor and A is a hydrogen-bond acceptor) of four hydrogen bonds. This set of fused rings can be represented by the graph-set notations R22(8), R42(8) and R22(8) arrangement. This type of motif has been reported in the crystal structures of trimethoprim hydrogen glutarate (Robert et al., 2001), acetoguanaminium 3-hydroxypicolinate monohydrate (Thanigaimani et al., 2010) and 2-amino-6-methylpyridinium 3-chlorobenzoate (Thanigaimani et al., 2013). The 2-aminogroup at N3 forms a bifurcated hydrogen bond (Table 1) with carboxyl atom O3ii and atom N1ii of a 3-hydroxypicolinate anion [graph-set R12(5)]. The π interactions (Table 1) involving the N1/C1–C5 (centroid Cg1) ring.
is further stabilized by weak C—H···For details of non-covalent interactions, see: Desiraju (2007); Aakeroy & Seddon (1993). For related structures, see: Nahringbauer & Kvick (1977); Robert et al. (2001); Thanigaimani et al. (2010, 2013). For hydrogen-bond motifs, see: Bernstein et al. (1995). For bond-length data, see: Allen et al. (1987). For stability of the temperature controller used for the data collection, see: Cosier & Glazer (1986).
Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).Fig. 1. The molecular structure of the title compound with atom labels with 50% probability displacement ellipsoids. | |
Fig. 2. The crystal packing of the title compound. The H atoms not involved in the intermolecular interactions (dashed lines) have been omitted for clarity. |
C6H9N2+·C6H4NO3− | F(000) = 520 |
Mr = 247.25 | Dx = 1.427 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 8234 reflections |
a = 7.3443 (4) Å | θ = 2.5–32.6° |
b = 16.4321 (9) Å | µ = 0.11 mm−1 |
c = 10.8235 (5) Å | T = 100 K |
β = 118.250 (3)° | Block, colourless |
V = 1150.62 (10) Å3 | 0.58 × 0.29 × 0.16 mm |
Z = 4 |
Bruker SMART APEXII DUO CCD area-detector diffractometer | 4132 independent reflections |
Radiation source: fine-focus sealed tube | 3596 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.020 |
φ and ω scans | θmax = 32.6°, θmin = 2.5° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −11→9 |
Tmin = 0.942, Tmax = 0.984 | k = −24→24 |
15996 measured reflections | l = −16→16 |
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)] = 0.036 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.115 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0686P)2 + 0.2463P] where P = (Fo2 + 2Fc2)/3 |
4132 reflections | (Δ/σ)max = 0.001 |
180 parameters | Δρmax = 0.47 e Å−3 |
0 restraints | Δρmin = −0.22 e Å−3 |
C6H9N2+·C6H4NO3− | V = 1150.62 (10) Å3 |
Mr = 247.25 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 7.3443 (4) Å | µ = 0.11 mm−1 |
b = 16.4321 (9) Å | T = 100 K |
c = 10.8235 (5) Å | 0.58 × 0.29 × 0.16 mm |
β = 118.250 (3)° |
Bruker SMART APEXII DUO CCD area-detector diffractometer | 4132 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 3596 reflections with I > 2σ(I) |
Tmin = 0.942, Tmax = 0.984 | Rint = 0.020 |
15996 measured reflections |
R[F2 > 2σ(F2)] = 0.036 | 0 restraints |
wR(F2) = 0.115 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | Δρmax = 0.47 e Å−3 |
4132 reflections | Δρmin = −0.22 e Å−3 |
180 parameters |
Experimental. The crystal was placed in the cold stream of an Oxford Cryosystems Cobra open-flow nitrogen cryostat (Cosier & Glazer, 1986) operating at 100.0 (1) K. |
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 | 0.38403 (10) | 0.83927 (4) | 0.52572 (6) | 0.02228 (14) | |
O2 | 0.41088 (9) | 0.89008 (4) | 0.31488 (7) | 0.01954 (13) | |
O3 | 0.12614 (10) | 0.90599 (4) | 0.10825 (6) | 0.01974 (13) | |
N1 | −0.10602 (10) | 0.82189 (4) | 0.20289 (7) | 0.01502 (13) | |
C1 | −0.22027 (12) | 0.78730 (5) | 0.25475 (8) | 0.01684 (14) | |
H1A | −0.3598 | 0.7738 | 0.1920 | 0.020* | |
C2 | −0.14303 (13) | 0.77021 (4) | 0.39745 (8) | 0.01669 (14) | |
H2A | −0.2297 | 0.7465 | 0.4307 | 0.020* | |
C3 | 0.06046 (13) | 0.78818 (4) | 0.48931 (8) | 0.01635 (14) | |
H3A | 0.1159 | 0.7773 | 0.5867 | 0.020* | |
C4 | 0.18388 (12) | 0.82274 (4) | 0.43669 (8) | 0.01437 (14) | |
C5 | 0.09352 (11) | 0.83951 (4) | 0.29191 (7) | 0.01291 (13) | |
C6 | 0.21674 (12) | 0.88142 (4) | 0.23125 (8) | 0.01460 (14) | |
N2 | 0.39598 (10) | 0.50115 (4) | 0.27137 (7) | 0.01444 (13) | |
N3 | 0.70889 (12) | 0.55236 (5) | 0.44004 (8) | 0.02005 (14) | |
C7 | 0.50370 (12) | 0.55708 (4) | 0.37131 (8) | 0.01518 (14) | |
C8 | 0.38865 (14) | 0.61797 (5) | 0.39723 (8) | 0.01833 (15) | |
H8A | 0.4581 | 0.6590 | 0.4655 | 0.022* | |
C9 | 0.17762 (14) | 0.61731 (5) | 0.32352 (9) | 0.01811 (15) | |
H9A | 0.1020 | 0.6576 | 0.3431 | 0.022* | |
C10 | 0.06826 (12) | 0.55828 (4) | 0.21858 (8) | 0.01489 (14) | |
C11 | 0.18508 (12) | 0.50126 (4) | 0.19649 (8) | 0.01427 (14) | |
H11A | 0.1179 | 0.4606 | 0.1272 | 0.017* | |
C12 | −0.16380 (13) | 0.56034 (5) | 0.13631 (9) | 0.01984 (16) | |
H12A | −0.2134 | 0.5109 | 0.0793 | 0.030* | |
H12B | −0.2072 | 0.6082 | 0.0750 | 0.030* | |
H12C | −0.2220 | 0.5633 | 0.2011 | 0.030* | |
H2N3 | 0.766 (2) | 0.5071 (9) | 0.4311 (15) | 0.030 (3)* | |
H1N3 | 0.779 (2) | 0.5866 (8) | 0.5053 (15) | 0.029 (3)* | |
H1O1 | 0.437 (3) | 0.8585 (12) | 0.469 (2) | 0.058 (5)* | |
H1N2 | 0.465 (2) | 0.4611 (9) | 0.2494 (15) | 0.036 (4)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0138 (3) | 0.0296 (3) | 0.0167 (3) | −0.0022 (2) | 0.0017 (2) | 0.0055 (2) |
O2 | 0.0115 (3) | 0.0238 (3) | 0.0219 (3) | −0.0005 (2) | 0.0067 (2) | 0.0054 (2) |
O3 | 0.0173 (3) | 0.0264 (3) | 0.0151 (3) | −0.0030 (2) | 0.0073 (2) | 0.0024 (2) |
N1 | 0.0137 (3) | 0.0162 (3) | 0.0150 (3) | −0.0018 (2) | 0.0067 (2) | −0.0012 (2) |
C1 | 0.0144 (3) | 0.0181 (3) | 0.0183 (3) | −0.0032 (2) | 0.0080 (3) | −0.0014 (2) |
C2 | 0.0187 (3) | 0.0156 (3) | 0.0190 (3) | −0.0011 (3) | 0.0116 (3) | 0.0000 (2) |
C3 | 0.0202 (4) | 0.0150 (3) | 0.0148 (3) | 0.0006 (2) | 0.0090 (3) | 0.0010 (2) |
C4 | 0.0136 (3) | 0.0139 (3) | 0.0139 (3) | 0.0007 (2) | 0.0050 (3) | 0.0007 (2) |
C5 | 0.0123 (3) | 0.0130 (3) | 0.0136 (3) | 0.0005 (2) | 0.0063 (3) | 0.0003 (2) |
C6 | 0.0135 (3) | 0.0148 (3) | 0.0165 (3) | −0.0001 (2) | 0.0079 (3) | −0.0001 (2) |
N2 | 0.0137 (3) | 0.0146 (3) | 0.0148 (3) | 0.0010 (2) | 0.0066 (2) | −0.0013 (2) |
N3 | 0.0148 (3) | 0.0217 (3) | 0.0187 (3) | −0.0003 (2) | 0.0039 (3) | −0.0020 (2) |
C7 | 0.0162 (3) | 0.0151 (3) | 0.0130 (3) | −0.0005 (2) | 0.0058 (3) | 0.0006 (2) |
C8 | 0.0217 (4) | 0.0153 (3) | 0.0162 (3) | 0.0011 (3) | 0.0076 (3) | −0.0024 (2) |
C9 | 0.0216 (4) | 0.0155 (3) | 0.0185 (3) | 0.0044 (3) | 0.0105 (3) | 0.0004 (2) |
C10 | 0.0154 (3) | 0.0150 (3) | 0.0153 (3) | 0.0023 (2) | 0.0082 (3) | 0.0028 (2) |
C11 | 0.0141 (3) | 0.0147 (3) | 0.0141 (3) | −0.0003 (2) | 0.0067 (3) | −0.0001 (2) |
C12 | 0.0152 (3) | 0.0223 (3) | 0.0230 (4) | 0.0034 (3) | 0.0098 (3) | 0.0051 (3) |
O1—C4 | 1.3499 (9) | N2—H1N2 | 0.927 (15) |
O1—H1O1 | 0.926 (19) | N3—C7 | 1.3301 (10) |
O2—C6 | 1.2848 (9) | N3—H2N3 | 0.883 (15) |
O3—C6 | 1.2408 (9) | N3—H1N3 | 0.859 (14) |
N1—C1 | 1.3372 (10) | C7—C8 | 1.4207 (11) |
N1—C5 | 1.3502 (10) | C8—C9 | 1.3668 (12) |
C1—C2 | 1.3989 (11) | C8—H8A | 0.9500 |
C1—H1A | 0.9500 | C9—C10 | 1.4187 (11) |
C2—C3 | 1.3793 (11) | C9—H9A | 0.9500 |
C2—H2A | 0.9500 | C10—C11 | 1.3657 (10) |
C3—C4 | 1.3990 (11) | C10—C12 | 1.5040 (11) |
C3—H3A | 0.9500 | C11—H11A | 0.9500 |
C4—C5 | 1.4098 (10) | C12—H12A | 0.9800 |
C5—C6 | 1.5122 (10) | C12—H12B | 0.9800 |
N2—C7 | 1.3529 (10) | C12—H12C | 0.9800 |
N2—C11 | 1.3666 (10) | ||
C4—O1—H1O1 | 104.5 (12) | C7—N3—H1N3 | 120.3 (10) |
C1—N1—C5 | 118.45 (6) | H2N3—N3—H1N3 | 120.5 (13) |
N1—C1—C2 | 122.80 (7) | N3—C7—N2 | 119.11 (7) |
N1—C1—H1A | 118.6 | N3—C7—C8 | 123.57 (7) |
C2—C1—H1A | 118.6 | N2—C7—C8 | 117.32 (7) |
C3—C2—C1 | 119.19 (7) | C9—C8—C7 | 119.69 (7) |
C3—C2—H2A | 120.4 | C9—C8—H8A | 120.2 |
C1—C2—H2A | 120.4 | C7—C8—H8A | 120.2 |
C2—C3—C4 | 118.90 (7) | C8—C9—C10 | 121.91 (7) |
C2—C3—H3A | 120.6 | C8—C9—H9A | 119.0 |
C4—C3—H3A | 120.6 | C10—C9—H9A | 119.0 |
O1—C4—C3 | 119.18 (7) | C11—C10—C9 | 116.40 (7) |
O1—C4—C5 | 122.33 (7) | C11—C10—C12 | 122.79 (7) |
C3—C4—C5 | 118.49 (7) | C9—C10—C12 | 120.80 (7) |
N1—C5—C4 | 122.15 (7) | C10—C11—N2 | 121.78 (7) |
N1—C5—C6 | 117.28 (6) | C10—C11—H11A | 119.1 |
C4—C5—C6 | 120.53 (7) | N2—C11—H11A | 119.1 |
O3—C6—O2 | 124.93 (7) | C10—C12—H12A | 109.5 |
O3—C6—C5 | 119.13 (7) | C10—C12—H12B | 109.5 |
O2—C6—C5 | 115.92 (6) | H12A—C12—H12B | 109.5 |
C7—N2—C11 | 122.89 (6) | C10—C12—H12C | 109.5 |
C7—N2—H1N2 | 120.2 (9) | H12A—C12—H12C | 109.5 |
C11—N2—H1N2 | 116.9 (9) | H12B—C12—H12C | 109.5 |
C7—N3—H2N3 | 117.5 (9) | ||
C5—N1—C1—C2 | 1.36 (11) | N1—C5—C6—O2 | −173.26 (6) |
N1—C1—C2—C3 | −1.19 (12) | C4—C5—C6—O2 | 9.01 (10) |
C1—C2—C3—C4 | −0.26 (11) | C11—N2—C7—N3 | 179.59 (7) |
C2—C3—C4—O1 | −178.95 (7) | C11—N2—C7—C8 | −0.11 (11) |
C2—C3—C4—C5 | 1.41 (11) | N3—C7—C8—C9 | −178.71 (7) |
C1—N1—C5—C4 | −0.11 (11) | N2—C7—C8—C9 | 0.97 (11) |
C1—N1—C5—C6 | −177.80 (6) | C7—C8—C9—C10 | −1.42 (12) |
O1—C4—C5—N1 | 179.10 (7) | C8—C9—C10—C11 | 0.95 (11) |
C3—C4—C5—N1 | −1.28 (11) | C8—C9—C10—C12 | −178.32 (7) |
O1—C4—C5—C6 | −3.29 (11) | C9—C10—C11—N2 | −0.06 (11) |
C3—C4—C5—C6 | 176.34 (6) | C12—C10—C11—N2 | 179.19 (6) |
N1—C5—C6—O3 | 8.08 (10) | C7—N2—C11—C10 | −0.35 (11) |
C4—C5—C6—O3 | −169.65 (7) |
Cg1 is the centroid of the N1/C1–C5 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1O1···O2 | 0.93 (2) | 1.66 (2) | 2.5239 (10) | 152 (2) |
N3—H2N3···O3i | 0.885 (15) | 1.969 (15) | 2.8504 (11) | 174.0 (14) |
N3—H1N3···O3ii | 0.859 (14) | 2.248 (15) | 2.8093 (10) | 123.0 (12) |
N3—H1N3···N1ii | 0.859 (14) | 2.416 (14) | 3.2481 (10) | 163.2 (13) |
N2—H1N2···O2i | 0.943 (16) | 1.796 (16) | 2.7327 (10) | 171.4 (13) |
C9—H9A···Cg1 | 0.95 | 2.59 | 3.4702 (10) | 154 |
C11—H11A···Cg1iii | 0.95 | 2.71 | 3.3956 (8) | 130 |
Symmetry codes: (i) −x+1, y−1/2, −z+1/2; (ii) x+1, −y+3/2, z+1/2; (iii) −x, y−1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C6H9N2+·C6H4NO3− |
Mr | 247.25 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 100 |
a, b, c (Å) | 7.3443 (4), 16.4321 (9), 10.8235 (5) |
β (°) | 118.250 (3) |
V (Å3) | 1150.62 (10) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.11 |
Crystal size (mm) | 0.58 × 0.29 × 0.16 |
Data collection | |
Diffractometer | Bruker SMART APEXII DUO CCD area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.942, 0.984 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 15996, 4132, 3596 |
Rint | 0.020 |
(sin θ/λ)max (Å−1) | 0.759 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.036, 0.115, 1.04 |
No. of reflections | 4132 |
No. of parameters | 180 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.47, −0.22 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
Cg1 is the centroid of the N1/C1–C5 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1O1···O2 | 0.93 (2) | 1.66 (2) | 2.5239 (10) | 152 (2) |
N3—H2N3···O3i | 0.885 (15) | 1.969 (15) | 2.8504 (11) | 174.0 (14) |
N3—H1N3···O3ii | 0.859 (14) | 2.248 (15) | 2.8093 (10) | 123.0 (12) |
N3—H1N3···N1ii | 0.859 (14) | 2.416 (14) | 3.2481 (10) | 163.2 (13) |
N2—H1N2···O2i | 0.943 (16) | 1.796 (16) | 2.7327 (10) | 171.4 (13) |
C9—H9A···Cg1 | 0.9500 | 2.59 | 3.4702 (10) | 154 |
C11—H11A···Cg1iii | 0.9500 | 2.71 | 3.3956 (8) | 130 |
Symmetry codes: (i) −x+1, y−1/2, −z+1/2; (ii) x+1, −y+3/2, z+1/2; (iii) −x, y−1/2, −z+1/2. |
Footnotes
‡Thomson Reuters ResearcherID: A-5599-2009.
Acknowledgements
The authors thank the Malaysian Government and Universiti Sains Malaysia (USM) for the research facilities and USM Short Term Grant, No. 304/PFIZIK/6312078 to conduct this work. KT thanks The Academy of Sciences for the Developing World and USM for the TWAS–USM fellowship.
References
Aakeroy, C. B. & Seddon, K. R. (1993). Chem. Soc. Rev. 22, 397–407. CrossRef CAS Web of Science Google Scholar
Allen, F. H., Kennard, O., Watson, D. G., Brammer, L., Orpen, A. G. & Taylor, R. (1987). J. Chem. Soc. Perkin Trans. 2, pp. S1–19. CSD CrossRef Web of Science Google Scholar
Bernstein, J., Davis, R. E., Shimoni, L. & Chang, N.-L. (1995). Angew. Chem. Int. Ed. Engl. 34, 1555–1573. CrossRef CAS Web of Science Google Scholar
Bruker (2009). SADABS, APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Cosier, J. & Glazer, A. M. (1986). J. Appl. Cryst. 19, 105–107. CrossRef CAS Web of Science IUCr Journals Google Scholar
Desiraju, G. R. (2007). Angew. Chem. Int. Ed. 46, 8342–8356. Web of Science CrossRef CAS Google Scholar
Nahringbauer, I. & Kvick, Å. (1977). Acta Cryst. B33, 2902–2905. CSD CrossRef CAS IUCr Journals Web of Science Google Scholar
Robert, J. J., Raj, S. B. & Muthiah, P. T. (2001). Acta Cryst. E57, o1206–o1208. Web of Science CSD CrossRef CAS IUCr Journals Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Spek, A. L. (2009). Acta Cryst. D65, 148–155. Web of Science CrossRef CAS IUCr Journals Google Scholar
Thanigaimani, K., Devi, P., Muthiah, P. T., Lynch, D. E. & Butcher, R. J. (2010). Acta Cryst. C66, o324–o328. Web of Science CSD CrossRef CAS IUCr Journals Google Scholar
Thanigaimani, K., Khalib, N. C., Arshad, S. & Razak, I. A. (2013). Acta Cryst. E69, o318. CSD CrossRef IUCr Journals Google Scholar
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Supramolecular architectures assembled via various delicate noncovalent interactions such as hydrogen bonds, π–π stacking and electrostatic interactions, etc., have attracted intense interest in recent years because of their fascinating structural diversity and potential applications for functional materials (Desiraju, 2007). Especially, the application of intermolecular hydrogen bonds is a well known and efficient tool in the field of organic crystal design owing to its strength and directional properties (Aakeroy & Seddon, 1993). In order to study potential hydrogen bonding interactions, the crystal structure determination of the title compound (I) was carried out.
The asymmetric unit (Fig. 1) contains one 2-amino-5-methylpyridinium cation and one 3-hydroxypicolinate anion. An intramolecular O1—H1O1···O2 hydrogen bond in the 3-hydroxypicolinate anion generates an S(6) ring motif. (Bernstein et al., 1995). This motif is also observed in the crystal structure of acetoguanaminium 3-hydroxypicolinate monohydrate (Thanigaimani et al., 2010). The proton transfers from the one of the carboxyl group oxygen atom (O2) to atom N1 of 2-amino-5-methylpyrimidine resulted in the widening of C7—N2—C11 angle of the pyridinium ring to 122.89 (7)°, compared to the corresponding angle of 117.4 (3)° in neutral 2-amino-5-methylpyridine (Nahringbauer & Kvick, 1977). The 2-amino-5-methylpyridinium cation is essentially planar, with a maximum deviation of 0.011 (1) Å for atom C9. The bond lengths (Allen et al., 1987) and angles are normal.
In the crystal packing (Fig. 2), the protonated N2 atom and a nitrogen atom of the 2-amino group (N3) are hydrogen-bonded to the carboxylate oxygen atoms (O2 and O3) via a pair of intramolecular N2—H1N2···O2i and N3—H2N3···O3i hydrogen bonds (symmetry code in Table 1), forming a ring motif R22(8) (Bernstein et al., 1995). These motifs are linked by N3—H1N3···O3ii hydrogen bonds (symmetry code in Table 1), forming a ring spanning the centre of symmetry at (1, -3/2, 1/2) to produce a DDAA array (where D is a hydrogen-bond donor and A is a hydrogen-bond acceptor) of four hydrogen bonds. This set of fused rings can be represented by the graph-set notations R22(8), R42(8) and R22(8) arrangement. This type of motif has been reported in the crystal structures of trimethoprim hydrogen glutarate (Robert et al., 2001), acetoguanaminium 3-hydroxypicolinate monohydrate (Thanigaimani et al., 2010) and 2-amino-6-methylpyridinium 3-chlorobenzoate (Thanigaimani et al., 2013). The 2-aminogroup at N3 forms a bifurcated hydrogen bond (Table 1) with carboxyl atom O3ii and atom N1ii of a 3-hydroxypicolinate anion [graph-set R12(5)]. The crystal structure is further stabilized by weak C—H···π interactions (Table 1) involving the N1/C1–C5 (centroid Cg1) ring.