organic compounds
2,3-Diaminopyridinium 3-chlorobenzoate–3-chlorobenzoic acid (1/1)
aX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
*Correspondence e-mail: hkfun@usm.my
The 5H8N3+·C7H4ClO2−·C7H5ClO2, contains an and a 3-chlorobenzoic acid molecule. In the cation, the pyridine N atom is protonated. In the crystal, the components are connected via N—H⋯O, O—H⋯O and C—H⋯O hydrogen bonds, thereby forming sheets lying parallel to (100).
of the title compound, CRelated literature
For further details on 2-aminopyridine, see: Bis & Zaworotko (2005); Bis et al. (2006). For general background to intermolecular interactions, see: Desiraju (2001); Haddad & Willett (2001); Willett et al. (2003). For bond-length data, see: Allen et al. (1987). For the stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986).
Experimental
Crystal data
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Refinement
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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/S1600536811050422/hb6530sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811050422/hb6530Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536811050422/hb6530Isup3.cml
Hot methanol solutions (20 ml) of 2,3-diaminopyridine (27 mg, Aldrich) and 3-chlorobenzoic acid (39 mg, Merck) were mixed and warmed over a heated magnetic stirrer for 5 minutes. The resulting solution was allowed to cool slowly at room temperature. Brown plates of (I) appeared from the mother liquor after a few days.
All hydrogen atoms were positioned geometrically [N–H = 0.86 and C–H = 0.93 Å] and were refined using a riding model, with Uiso(H) = 1.2 or 1.5 Ueq(C). A rotating group model was applied to the methyl groups.
2-Aminopyridine is one of the most frequently used synthons in supramolecular chemistry based on hydrogen bonds (Bis & Zaworotko, 2005; Bis et al., 2006). In the crystals of such compounds, weak intermolecular interactions involving halide ions, halogen–halide interactions, as well as π···π stacking effects, are found to play an important role in the organization of the structural units (Desiraju, 2001; Haddad & Willett, 2001; Willett et al., 2003). In order to study some interesting hydrogen bonding interactions, the synthesis and structure of the title compound, (I), is presented here.
The
of (I) (Fig 1), contains a protonated 2,3-diamino pyridinium cation, a 3-chlorobenzoate anion and a neutral 3-chlorobenzoic acid. In the 2,3-diaminopyridinium cation, the protonated N1 atom has lead to a slight increase in the C1—N1—C5 angle to 124.0 (2)°. The dihedral angle between the pyridine (N1/C1–C5) and each of the two phenyl (C6–C11/C13–C18) rings are 8.68 (12) and 75.42 (12)°, respectively. The bond lengths (Allen et al., 1987) and angles are normal.In the crystal of (I), (Fig. 2), the ion-pairs and the neutral acid molecules are connected via N—H···O, O—H···N and C—H···O hydrogen bonds forming two-dimensional networks parallel to (1 0 0)-plane.
For further details on 2-aminopyridine, see: Bis & Zaworotko (2005); Bis et al. (2006). For general background to intermolecular interactions, see: Desiraju (2001); Haddad & Willett (2001); Willett et al. (2003). For bond-length data, see: Allen et al. (1987). For the stability of the temperature controller used in 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 asymmetric unit of the title compound, showing 50% probability displacement ellipsoids. | |
Fig. 2. The crystal packing of title compound (I). |
C5H8N3+·C7H4ClO2−·C7H5ClO2 | F(000) = 1744 |
Mr = 422.26 | Dx = 1.474 Mg m−3 |
Orthorhombic, Pccn | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ab 2ac | Cell parameters from 3141 reflections |
a = 33.3187 (7) Å | θ = 2.9–25.1° |
b = 8.6628 (2) Å | µ = 0.37 mm−1 |
c = 13.1811 (2) Å | T = 100 K |
V = 3804.50 (13) Å3 | Plate, brown |
Z = 8 | 0.44 × 0.19 × 0.05 mm |
Bruker SMART APEXII CCD diffractometer | 5596 independent reflections |
Radiation source: fine-focus sealed tube | 3717 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.079 |
φ and ω scans | θmax = 30.1°, θmin = 2.4° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −46→46 |
Tmin = 0.854, Tmax = 0.980 | k = −8→12 |
25995 measured reflections | l = −14→18 |
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)] = 0.062 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.149 | H-atom parameters constrained |
S = 1.02 | w = 1/[σ2(Fo2) + (0.0532P)2 + 4.6426P] where P = (Fo2 + 2Fc2)/3 |
5596 reflections | (Δ/σ)max < 0.001 |
254 parameters | Δρmax = 0.65 e Å−3 |
0 restraints | Δρmin = −0.57 e Å−3 |
C5H8N3+·C7H4ClO2−·C7H5ClO2 | V = 3804.50 (13) Å3 |
Mr = 422.26 | Z = 8 |
Orthorhombic, Pccn | Mo Kα radiation |
a = 33.3187 (7) Å | µ = 0.37 mm−1 |
b = 8.6628 (2) Å | T = 100 K |
c = 13.1811 (2) Å | 0.44 × 0.19 × 0.05 mm |
Bruker SMART APEXII CCD diffractometer | 5596 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 3717 reflections with I > 2σ(I) |
Tmin = 0.854, Tmax = 0.980 | Rint = 0.079 |
25995 measured reflections |
R[F2 > 2σ(F2)] = 0.062 | 0 restraints |
wR(F2) = 0.149 | H-atom parameters constrained |
S = 1.02 | Δρmax = 0.65 e Å−3 |
5596 reflections | Δρmin = −0.57 e Å−3 |
254 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 s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'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 > 2σ(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 | ||
N1 | 0.01367 (6) | 0.6953 (2) | 0.51452 (16) | 0.0206 (5) | |
H1 | −0.0050 | 0.7511 | 0.4885 | 0.025* | |
N2 | −0.01884 (6) | 0.7200 (3) | 0.66837 (17) | 0.0234 (5) | |
H2A | −0.0373 | 0.7729 | 0.6389 | 0.028* | |
H2B | −0.0203 | 0.7020 | 0.7324 | 0.028* | |
N3 | 0.04450 (6) | 0.5583 (2) | 0.76248 (15) | 0.0194 (4) | |
H3A | 0.0641 | 0.5096 | 0.7905 | 0.023* | |
H3B | 0.0255 | 0.5959 | 0.7993 | 0.023* | |
C1 | 0.01206 (7) | 0.6658 (3) | 0.61463 (19) | 0.0184 (5) | |
C2 | 0.04354 (7) | 0.5763 (3) | 0.65881 (18) | 0.0159 (5) | |
C3 | 0.07273 (7) | 0.5196 (3) | 0.59485 (18) | 0.0191 (5) | |
H3 | 0.0931 | 0.4581 | 0.6214 | 0.023* | |
C4 | 0.07254 (8) | 0.5523 (3) | 0.49033 (19) | 0.0207 (5) | |
H4 | 0.0924 | 0.5126 | 0.4482 | 0.025* | |
C5 | 0.04304 (8) | 0.6425 (3) | 0.4521 (2) | 0.0222 (5) | |
H5 | 0.0429 | 0.6682 | 0.3836 | 0.027* | |
Cl1 | 0.27106 (2) | −0.04829 (9) | 0.85137 (6) | 0.03177 (18) | |
O1 | 0.13896 (5) | 0.2618 (2) | 0.91982 (13) | 0.0243 (4) | |
H1A | 0.1189 | 0.3054 | 0.9414 | 0.036* | |
O2 | 0.11287 (7) | 0.3315 (3) | 0.77151 (16) | 0.0452 (6) | |
C6 | 0.20367 (7) | 0.1198 (3) | 0.8287 (2) | 0.0207 (5) | |
H6 | 0.2023 | 0.1203 | 0.8991 | 0.025* | |
C7 | 0.23479 (7) | 0.0453 (3) | 0.7791 (2) | 0.0229 (5) | |
C8 | 0.23713 (8) | 0.0418 (3) | 0.6741 (2) | 0.0265 (6) | |
H8 | 0.2580 | −0.0104 | 0.6421 | 0.032* | |
C9 | 0.20807 (8) | 0.1168 (3) | 0.6175 (2) | 0.0281 (6) | |
H9 | 0.2095 | 0.1156 | 0.5470 | 0.034* | |
C10 | 0.17703 (8) | 0.1931 (3) | 0.6651 (2) | 0.0246 (6) | |
H10 | 0.1577 | 0.2441 | 0.6268 | 0.030* | |
C11 | 0.17461 (7) | 0.1938 (3) | 0.77091 (19) | 0.0194 (5) | |
C12 | 0.13958 (8) | 0.2704 (3) | 0.8195 (2) | 0.0229 (6) | |
Cl2 | 0.18144 (2) | 0.80228 (9) | 1.00830 (5) | 0.03097 (18) | |
O3 | 0.03184 (5) | 0.3859 (2) | 1.11579 (14) | 0.0232 (4) | |
O4 | 0.07032 (5) | 0.3671 (2) | 0.97878 (14) | 0.0231 (4) | |
C13 | 0.12004 (7) | 0.6069 (3) | 1.04635 (19) | 0.0177 (5) | |
H13 | 0.1203 | 0.5860 | 0.9771 | 0.021* | |
C14 | 0.14733 (7) | 0.7093 (3) | 1.0881 (2) | 0.0206 (5) | |
C15 | 0.14826 (8) | 0.7410 (3) | 1.1909 (2) | 0.0234 (6) | |
H15 | 0.1671 | 0.8093 | 1.2175 | 0.028* | |
C16 | 0.12051 (8) | 0.6688 (3) | 1.2534 (2) | 0.0249 (6) | |
H16 | 0.1208 | 0.6884 | 1.3228 | 0.030* | |
C17 | 0.09240 (8) | 0.5677 (3) | 1.21324 (19) | 0.0208 (5) | |
H17 | 0.0736 | 0.5214 | 1.2557 | 0.025* | |
C18 | 0.09208 (7) | 0.5352 (3) | 1.11004 (18) | 0.0157 (5) | |
C19 | 0.06258 (7) | 0.4214 (3) | 1.06588 (19) | 0.0182 (5) |
U11 | U22 | U33 | U12 | U13 | U23 | |
N1 | 0.0220 (10) | 0.0193 (11) | 0.0205 (11) | 0.0026 (9) | −0.0071 (8) | 0.0014 (9) |
N2 | 0.0206 (11) | 0.0263 (13) | 0.0232 (12) | 0.0072 (9) | −0.0027 (9) | −0.0019 (9) |
N3 | 0.0178 (10) | 0.0243 (11) | 0.0161 (10) | 0.0047 (9) | 0.0005 (8) | 0.0021 (8) |
C1 | 0.0200 (12) | 0.0145 (12) | 0.0209 (13) | −0.0017 (9) | −0.0026 (9) | −0.0029 (9) |
C2 | 0.0163 (11) | 0.0129 (11) | 0.0185 (12) | −0.0031 (9) | −0.0010 (9) | 0.0008 (9) |
C3 | 0.0196 (12) | 0.0198 (13) | 0.0178 (12) | 0.0008 (10) | −0.0011 (9) | 0.0032 (9) |
C4 | 0.0214 (12) | 0.0213 (13) | 0.0194 (12) | −0.0025 (10) | 0.0021 (9) | −0.0025 (10) |
C5 | 0.0272 (13) | 0.0232 (14) | 0.0162 (12) | −0.0037 (11) | −0.0014 (10) | −0.0015 (10) |
Cl1 | 0.0250 (3) | 0.0342 (4) | 0.0360 (4) | 0.0090 (3) | −0.0026 (3) | 0.0002 (3) |
O1 | 0.0217 (9) | 0.0332 (11) | 0.0181 (9) | 0.0076 (8) | 0.0005 (7) | −0.0003 (8) |
O2 | 0.0437 (13) | 0.0710 (17) | 0.0209 (11) | 0.0359 (12) | 0.0007 (9) | 0.0056 (11) |
C6 | 0.0183 (11) | 0.0224 (13) | 0.0213 (13) | −0.0016 (10) | 0.0005 (9) | −0.0004 (10) |
C7 | 0.0176 (12) | 0.0217 (13) | 0.0293 (14) | 0.0005 (10) | −0.0023 (10) | −0.0007 (11) |
C8 | 0.0216 (13) | 0.0288 (15) | 0.0292 (15) | 0.0001 (11) | 0.0046 (10) | −0.0069 (12) |
C9 | 0.0288 (14) | 0.0369 (17) | 0.0185 (13) | −0.0045 (13) | 0.0034 (11) | −0.0033 (12) |
C10 | 0.0229 (13) | 0.0285 (14) | 0.0224 (13) | −0.0005 (11) | −0.0017 (10) | −0.0006 (11) |
C11 | 0.0181 (12) | 0.0193 (12) | 0.0209 (12) | 0.0003 (10) | 0.0008 (9) | −0.0019 (10) |
C12 | 0.0241 (13) | 0.0247 (14) | 0.0199 (13) | 0.0053 (11) | 0.0000 (10) | −0.0015 (10) |
Cl2 | 0.0307 (3) | 0.0345 (4) | 0.0277 (4) | −0.0138 (3) | 0.0060 (3) | −0.0006 (3) |
O3 | 0.0162 (8) | 0.0277 (10) | 0.0256 (10) | −0.0026 (8) | 0.0037 (7) | −0.0052 (8) |
O4 | 0.0180 (9) | 0.0303 (11) | 0.0209 (9) | −0.0013 (8) | −0.0002 (7) | −0.0093 (8) |
C13 | 0.0187 (11) | 0.0197 (13) | 0.0146 (11) | 0.0023 (10) | −0.0021 (9) | −0.0020 (9) |
C14 | 0.0154 (11) | 0.0230 (13) | 0.0234 (13) | −0.0001 (10) | 0.0016 (9) | 0.0018 (10) |
C15 | 0.0214 (12) | 0.0259 (14) | 0.0229 (13) | −0.0039 (11) | −0.0042 (10) | −0.0062 (11) |
C16 | 0.0258 (13) | 0.0319 (15) | 0.0171 (12) | −0.0029 (12) | −0.0020 (10) | −0.0059 (10) |
C17 | 0.0198 (12) | 0.0266 (14) | 0.0161 (12) | 0.0006 (10) | 0.0023 (9) | −0.0024 (10) |
C18 | 0.0146 (11) | 0.0165 (12) | 0.0158 (11) | 0.0031 (9) | −0.0019 (8) | −0.0015 (9) |
C19 | 0.0155 (11) | 0.0202 (13) | 0.0188 (12) | 0.0029 (10) | −0.0019 (9) | −0.0017 (9) |
N1—C1 | 1.345 (3) | C7—C8 | 1.387 (4) |
N1—C5 | 1.358 (3) | C8—C9 | 1.384 (4) |
N1—H1 | 0.8600 | C8—H8 | 0.9300 |
N2—C1 | 1.335 (3) | C9—C10 | 1.379 (4) |
N2—H2A | 0.8600 | C9—H9 | 0.9300 |
N2—H2B | 0.8600 | C10—C11 | 1.397 (4) |
N3—C2 | 1.376 (3) | C10—H10 | 0.9300 |
N3—H3A | 0.8600 | C11—C12 | 1.488 (3) |
N3—H3B | 0.8600 | Cl2—C14 | 1.745 (3) |
C1—C2 | 1.428 (3) | O3—C19 | 1.256 (3) |
C2—C3 | 1.378 (3) | O4—C19 | 1.267 (3) |
C3—C4 | 1.407 (3) | C13—C14 | 1.384 (3) |
C3—H3 | 0.9300 | C13—C18 | 1.399 (3) |
C4—C5 | 1.353 (4) | C13—H13 | 0.9300 |
C4—H4 | 0.9300 | C14—C15 | 1.383 (4) |
C5—H5 | 0.9300 | C15—C16 | 1.387 (4) |
Cl1—C7 | 1.739 (3) | C15—H15 | 0.9300 |
O1—C12 | 1.324 (3) | C16—C17 | 1.388 (4) |
O1—H1A | 0.8200 | C16—H16 | 0.9300 |
O2—C12 | 1.214 (3) | C17—C18 | 1.389 (3) |
C6—C7 | 1.385 (4) | C17—H17 | 0.9300 |
C6—C11 | 1.388 (3) | C18—C19 | 1.509 (3) |
C6—H6 | 0.9300 | ||
C1—N1—C5 | 124.0 (2) | C10—C9—C8 | 120.3 (3) |
C1—N1—H1 | 118.0 | C10—C9—H9 | 119.9 |
C5—N1—H1 | 118.0 | C8—C9—H9 | 119.9 |
C1—N2—H2A | 120.0 | C9—C10—C11 | 120.0 (3) |
C1—N2—H2B | 120.0 | C9—C10—H10 | 120.0 |
H2A—N2—H2B | 120.0 | C11—C10—H10 | 120.0 |
C2—N3—H3A | 120.0 | C6—C11—C10 | 120.3 (2) |
C2—N3—H3B | 120.0 | C6—C11—C12 | 121.1 (2) |
H3A—N3—H3B | 120.0 | C10—C11—C12 | 118.5 (2) |
N2—C1—N1 | 119.0 (2) | O2—C12—O1 | 122.3 (2) |
N2—C1—C2 | 122.7 (2) | O2—C12—C11 | 123.0 (2) |
N1—C1—C2 | 118.3 (2) | O1—C12—C11 | 114.6 (2) |
N3—C2—C3 | 123.4 (2) | C14—C13—C18 | 118.9 (2) |
N3—C2—C1 | 118.9 (2) | C14—C13—H13 | 120.6 |
C3—C2—C1 | 117.5 (2) | C18—C13—H13 | 120.6 |
C2—C3—C4 | 121.6 (2) | C15—C14—C13 | 122.1 (2) |
C2—C3—H3 | 119.2 | C15—C14—Cl2 | 118.9 (2) |
C4—C3—H3 | 119.2 | C13—C14—Cl2 | 119.0 (2) |
C5—C4—C3 | 119.0 (2) | C14—C15—C16 | 118.5 (2) |
C5—C4—H4 | 120.5 | C14—C15—H15 | 120.7 |
C3—C4—H4 | 120.5 | C16—C15—H15 | 120.7 |
C4—C5—N1 | 119.5 (2) | C15—C16—C17 | 120.5 (2) |
C4—C5—H5 | 120.3 | C15—C16—H16 | 119.7 |
N1—C5—H5 | 120.3 | C17—C16—H16 | 119.7 |
C12—O1—H1A | 109.5 | C16—C17—C18 | 120.4 (2) |
C7—C6—C11 | 118.6 (2) | C16—C17—H17 | 119.8 |
C7—C6—H6 | 120.7 | C18—C17—H17 | 119.8 |
C11—C6—H6 | 120.7 | C17—C18—C13 | 119.5 (2) |
C6—C7—C8 | 121.5 (2) | C17—C18—C19 | 121.0 (2) |
C6—C7—Cl1 | 118.7 (2) | C13—C18—C19 | 119.5 (2) |
C8—C7—Cl1 | 119.8 (2) | O3—C19—O4 | 123.3 (2) |
C9—C8—C7 | 119.2 (2) | O3—C19—C18 | 119.3 (2) |
C9—C8—H8 | 120.4 | O4—C19—C18 | 117.4 (2) |
C7—C8—H8 | 120.4 | ||
C5—N1—C1—N2 | −178.1 (2) | C9—C10—C11—C12 | −176.9 (3) |
C5—N1—C1—C2 | 1.4 (4) | C6—C11—C12—O2 | −177.4 (3) |
N2—C1—C2—N3 | −7.0 (4) | C10—C11—C12—O2 | 0.5 (4) |
N1—C1—C2—N3 | 173.5 (2) | C6—C11—C12—O1 | 0.2 (4) |
N2—C1—C2—C3 | 176.6 (2) | C10—C11—C12—O1 | 178.0 (2) |
N1—C1—C2—C3 | −3.0 (3) | C18—C13—C14—C15 | 1.1 (4) |
N3—C2—C3—C4 | −174.2 (2) | C18—C13—C14—Cl2 | −178.48 (19) |
C1—C2—C3—C4 | 2.1 (4) | C13—C14—C15—C16 | −0.8 (4) |
C2—C3—C4—C5 | 0.4 (4) | Cl2—C14—C15—C16 | 178.8 (2) |
C3—C4—C5—N1 | −2.0 (4) | C14—C15—C16—C17 | −0.3 (4) |
C1—N1—C5—C4 | 1.1 (4) | C15—C16—C17—C18 | 1.1 (4) |
C11—C6—C7—C8 | −0.8 (4) | C16—C17—C18—C13 | −0.8 (4) |
C11—C6—C7—Cl1 | −179.7 (2) | C16—C17—C18—C19 | 177.9 (2) |
C6—C7—C8—C9 | 1.1 (4) | C14—C13—C18—C17 | −0.3 (4) |
Cl1—C7—C8—C9 | −180.0 (2) | C14—C13—C18—C19 | −179.1 (2) |
C7—C8—C9—C10 | −0.5 (4) | C17—C18—C19—O3 | 18.4 (4) |
C8—C9—C10—C11 | −0.6 (4) | C13—C18—C19—O3 | −162.8 (2) |
C7—C6—C11—C10 | −0.3 (4) | C17—C18—C19—O4 | −162.0 (2) |
C7—C6—C11—C12 | 177.5 (2) | C13—C18—C19—O4 | 16.8 (3) |
C9—C10—C11—C6 | 1.0 (4) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O3i | 0.86 | 2.01 | 2.824 (3) | 157 |
N1—H1···O4i | 0.86 | 2.44 | 3.171 (3) | 144 |
O1—H1A···O4 | 0.82 | 1.77 | 2.582 (2) | 169 |
N2—H2A···O4i | 0.86 | 2.07 | 2.886 (3) | 158 |
N2—H2B···O3ii | 0.86 | 2.18 | 3.021 (3) | 168 |
N3—H3A···O2 | 0.86 | 2.25 | 3.011 (3) | 147 |
N3—H3B···O3ii | 0.86 | 2.22 | 3.046 (3) | 161 |
C3—H3···O2 | 0.93 | 2.36 | 3.141 (3) | 142 |
Symmetry codes: (i) −x, y+1/2, −z+3/2; (ii) −x, −y+1, −z+2. |
Experimental details
Crystal data | |
Chemical formula | C5H8N3+·C7H4ClO2−·C7H5ClO2 |
Mr | 422.26 |
Crystal system, space group | Orthorhombic, Pccn |
Temperature (K) | 100 |
a, b, c (Å) | 33.3187 (7), 8.6628 (2), 13.1811 (2) |
V (Å3) | 3804.50 (13) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.37 |
Crystal size (mm) | 0.44 × 0.19 × 0.05 |
Data collection | |
Diffractometer | Bruker SMART APEXII CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.854, 0.980 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 25995, 5596, 3717 |
Rint | 0.079 |
(sin θ/λ)max (Å−1) | 0.706 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.062, 0.149, 1.02 |
No. of reflections | 5596 |
No. of parameters | 254 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.65, −0.57 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O3i | 0.86 | 2.01 | 2.824 (3) | 157 |
N1—H1···O4i | 0.86 | 2.44 | 3.171 (3) | 144 |
O1—H1A···O4 | 0.82 | 1.77 | 2.582 (2) | 169 |
N2—H2A···O4i | 0.86 | 2.07 | 2.886 (3) | 158 |
N2—H2B···O3ii | 0.86 | 2.18 | 3.021 (3) | 168 |
N3—H3A···O2 | 0.86 | 2.25 | 3.011 (3) | 147 |
N3—H3B···O3ii | 0.86 | 2.22 | 3.046 (3) | 161 |
C3—H3···O2 | 0.93 | 2.36 | 3.141 (3) | 142 |
Symmetry codes: (i) −x, y+1/2, −z+3/2; (ii) −x, −y+1, −z+2. |
Acknowledgements
MH, JHG and HKF thank the Malaysian Government and Universiti Sains Malaysia for the Research University Grant No. 1001/PFIZIK/811160. MH also thanks Universiti Sains Malaysia for a post-doctoral research fellowship.
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.
2-Aminopyridine is one of the most frequently used synthons in supramolecular chemistry based on hydrogen bonds (Bis & Zaworotko, 2005; Bis et al., 2006). In the crystals of such compounds, weak intermolecular interactions involving halide ions, halogen–halide interactions, as well as π···π stacking effects, are found to play an important role in the organization of the structural units (Desiraju, 2001; Haddad & Willett, 2001; Willett et al., 2003). In order to study some interesting hydrogen bonding interactions, the synthesis and structure of the title compound, (I), is presented here.
The asymmetric unit of (I) (Fig 1), contains a protonated 2,3-diamino pyridinium cation, a 3-chlorobenzoate anion and a neutral 3-chlorobenzoic acid. In the 2,3-diaminopyridinium cation, the protonated N1 atom has lead to a slight increase in the C1—N1—C5 angle to 124.0 (2)°. The dihedral angle between the pyridine (N1/C1–C5) and each of the two phenyl (C6–C11/C13–C18) rings are 8.68 (12) and 75.42 (12)°, respectively. The bond lengths (Allen et al., 1987) and angles are normal.
In the crystal of (I), (Fig. 2), the ion-pairs and the neutral acid molecules are connected via N—H···O, O—H···N and C—H···O hydrogen bonds forming two-dimensional networks parallel to (1 0 0)-plane.