organic compounds
2-Aminobenzoic acid–4-(pyridin-4-yldisulfanyl)pyridine (1/1)
aDepartment of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249-0698, USA, and bDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
*Correspondence e-mail: edward.tiekink@gmail.com
The title 1:1 7H7NO2·C10H8N2S2, features a highly twisted 4-(pyridin-4-yldisulfanyl)pyridine molecule [dihedral angle between the pyridine rings = 89.06 (10)°]. A small twist is evident in the 2-aminobenzoic acid molecule, with the C—C—C—O torsion angle being −7.7 (3)°. An N—H⋯O hydrogen bond occurs in the 2-aminobenzoic acid molecule. In the crystal, molecules are linked by O—H⋯N and N—H⋯N hydrogen bonds into a supramolecular chain along the b axis. These are connected into layers by π–π interactions occurring between pyridine rings [centroid–centroid distance = 3.8489 (15) Å]. The layers are connected along the a axis by C—H⋯O contacts. The crystal studied was a racemic twin.
CRelated literature
For related studies on ); Wardell & Tiekink (2011); Arman et al. (2011).
formation between carboxylic acids and pyridyl derivatives, see: Arman & Tiekink (2010Experimental
Crystal data
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Data collection
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Refinement
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Data collection: CrystalClear (Molecular Structure Corporation & 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: ORTEPII (Johnson, 1976) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
https://doi.org/10.1107/S1600536811048483/zs2162sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811048483/zs2162Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536811048483/zs2162Isup3.cml
Colourless crystals of (I) were isolated from the 1:2 co-crystallization of 4-(pyridin-4-yldisulfanyl)pyridine (Sigma-Aldrich, 0.104 mmol) and 2-aminobenzoic acid (Sigma-Aldrich, 0.182 mmol) in chloroform solution (7 ml).
The C-bound H-atoms were placed in calculated positions (C—H = 0.95 Å) and were included in the
in the riding model approximation with Uiso(H) set to 1.2Ueq(C). The O– and N-bound H-atoms were located in a difference Fourier map and were refined with distance restraints of O—H = 0.840±0.001 Å and N—H = 0.880±0.001 Å, respectively, and with Uiso(H) = 1.5Ueq(O, N). The crystal studied was a racemic twin.In connection with recent co-crystallization experiments of
with pyridyl-N-containing molecules (Arman & Tiekink, 2010; Wardell & Tiekink, 2011; Arman et al., 2011), the 1:2 co-crystallization of 4-(pyridin-4-yldisulfanyl)pyridine and 2-aminobenzoic acid was investigated. This led to the isolation and characterization of the title 1:1 (I).A single molecule of each of 4-(pyridin-4-yldisulfanyl)pyridine (Fig. 1), and 2-aminobenzoic acid (Fig. 2), comprise the crystallographic
of (I). The molecule is twisted with the 4-pyridyl rings being almost perpendicular to each other as seen in the value of the dihedral angle of 89.06 (10)°. The carboxylic acid residue is slightly twisted out of the plane of the benzene ring to which it is connected as seen in the C1—C2—C7—O1 torsion angle of -7.7 (3)°. This twist occurs despite the presence of an intramolecular N—H···O1 hydrogen bond (Table 1).The most prominent feature of the crystal packing is the formation of supramolecular chains comprising alternating 4-(pyridin-4-yldisulfanyl)pyridine and 2-aminobenzoic acid molecules linked by O—H···N and N—H···N hydrogen bonds (Fig. 3 and Table 1). The chains pack into layers in the bc plane and are arranged so that pairs of chains face each other to allow for the formation of weak π–π interactions and for the interdigitation of the benzoic acid residues. The π–π interactions of 3.8489 (15) Å occur between the ring centroids of the (N2,C8–C12) and (N3,C13–C17)iii pyridyl rings (Fig. 4) [symmetry code (iii) x, -y + 1, z + 1/2]. Layers stack along the a axis, being connected by C—H···O interactions [Fig. 5 and Table 1].
For related studies on
formation between and pyridyl derivatives, see: Arman & Tiekink (2010); Wardell & Tiekink (2011); Arman et al. (2011).Data collection: CrystalClear (Molecular Structure Corporation & Rigaku, 2005); cell
CrystalClear (Molecular Structure Corporation & Rigaku, 2005); data reduction: CrystalClear (Molecular Structure Corporation & Rigaku, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEPII (Johnson, 1976) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).C7H7NO2·C10H8N2S2 | F(000) = 744 |
Mr = 357.46 | Dx = 1.414 Mg m−3 |
Monoclinic, Cc | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: C -2yc | Cell parameters from 3807 reflections |
a = 8.636 (2) Å | θ = 2.7–40.5° |
b = 12.728 (3) Å | µ = 0.33 mm−1 |
c = 15.688 (4) Å | T = 98 K |
β = 103.218 (4)° | Block, colourless |
V = 1678.7 (7) Å3 | 0.30 × 0.27 × 0.15 mm |
Z = 4 |
Rigaku AFC12K/SATURN724 CCD diffractometer | 3115 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.000 |
Graphite monochromator | θmax = 27.5°, θmin = 2.7° |
ω scans | h = −11→10 |
3149 measured reflections | k = 0→16 |
3149 independent reflections | l = −20→20 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.031 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.078 | w = 1/[σ2(Fo2) + (0.047P)2 + 0.5616P] where P = (Fo2 + 2Fc2)/3 |
S = 1.03 | (Δ/σ)max = 0.001 |
3149 reflections | Δρmax = 0.25 e Å−3 |
227 parameters | Δρmin = −0.23 e Å−3 |
6 restraints | Absolute structure: nd |
Primary atom site location: structure-invariant direct methods |
C7H7NO2·C10H8N2S2 | V = 1678.7 (7) Å3 |
Mr = 357.46 | Z = 4 |
Monoclinic, Cc | Mo Kα radiation |
a = 8.636 (2) Å | µ = 0.33 mm−1 |
b = 12.728 (3) Å | T = 98 K |
c = 15.688 (4) Å | 0.30 × 0.27 × 0.15 mm |
β = 103.218 (4)° |
Rigaku AFC12K/SATURN724 CCD diffractometer | 3115 reflections with I > 2σ(I) |
3149 measured reflections | Rint = 0.000 |
3149 independent reflections |
R[F2 > 2σ(F2)] = 0.031 | 6 restraints |
wR(F2) = 0.078 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | Δρmax = 0.25 e Å−3 |
3149 reflections | Δρmin = −0.23 e Å−3 |
227 parameters | Absolute structure: nd |
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 | ||
S1 | 1.03842 (6) | 0.51910 (4) | 0.54403 (3) | 0.02643 (12) | |
S2 | 0.84697 (6) | 0.53636 (3) | 0.44236 (3) | 0.02623 (12) | |
O1 | 0.4176 (2) | 0.28720 (11) | 0.58052 (9) | 0.0301 (3) | |
H1o | 0.425 (4) | 0.2527 (19) | 0.6269 (10) | 0.045* | |
O2 | 0.45445 (19) | 0.42702 (12) | 0.66806 (9) | 0.0311 (3) | |
N1 | 0.4410 (2) | 0.30644 (14) | 0.41463 (11) | 0.0323 (4) | |
H1n | 0.428 (3) | 0.2877 (17) | 0.3594 (5) | 0.048* | |
H2n | 0.418 (4) | 0.2615 (14) | 0.4525 (11) | 0.048* | |
N2 | 0.9169 (2) | 0.27383 (14) | 0.73043 (12) | 0.0302 (4) | |
N3 | 0.9212 (2) | 0.33036 (13) | 0.21812 (11) | 0.0271 (3) | |
C1 | 0.4350 (2) | 0.41116 (14) | 0.43227 (12) | 0.0212 (4) | |
C2 | 0.4369 (2) | 0.45314 (14) | 0.51627 (12) | 0.0213 (4) | |
C3 | 0.4360 (2) | 0.56293 (16) | 0.52675 (13) | 0.0261 (4) | |
H3 | 0.4382 | 0.5912 | 0.5831 | 0.031* | |
C4 | 0.4322 (3) | 0.63068 (16) | 0.45784 (15) | 0.0291 (4) | |
H4 | 0.4322 | 0.7046 | 0.4665 | 0.035* | |
C5 | 0.4282 (3) | 0.58886 (16) | 0.37511 (14) | 0.0276 (4) | |
H5 | 0.4246 | 0.6347 | 0.3269 | 0.033* | |
C6 | 0.4294 (2) | 0.48188 (15) | 0.36270 (13) | 0.0241 (4) | |
H6 | 0.4263 | 0.4551 | 0.3058 | 0.029* | |
C7 | 0.4379 (2) | 0.38954 (15) | 0.59532 (12) | 0.0240 (4) | |
C8 | 1.0466 (3) | 0.33503 (17) | 0.75021 (13) | 0.0309 (4) | |
H8 | 1.1159 | 0.3276 | 0.8064 | 0.037* | |
C9 | 1.0850 (3) | 0.40835 (17) | 0.69325 (13) | 0.0284 (4) | |
H9 | 1.1792 | 0.4492 | 0.7096 | 0.034* | |
C10 | 0.9828 (2) | 0.42076 (14) | 0.61162 (12) | 0.0221 (4) | |
C11 | 0.8478 (2) | 0.35789 (15) | 0.58888 (13) | 0.0236 (4) | |
H11 | 0.7764 | 0.3636 | 0.5332 | 0.028* | |
C12 | 0.8218 (2) | 0.28615 (15) | 0.65130 (13) | 0.0269 (4) | |
H12 | 0.7298 | 0.2430 | 0.6363 | 0.032* | |
C13 | 0.8862 (2) | 0.45427 (14) | 0.35820 (12) | 0.0213 (4) | |
C14 | 1.0171 (2) | 0.38876 (15) | 0.36659 (13) | 0.0246 (4) | |
H14 | 1.0959 | 0.3849 | 0.4198 | 0.030* | |
C15 | 1.0288 (3) | 0.32873 (16) | 0.29402 (14) | 0.0268 (4) | |
H15 | 1.1186 | 0.2841 | 0.2989 | 0.032* | |
C16 | 0.7979 (3) | 0.39530 (17) | 0.21060 (13) | 0.0293 (4) | |
H16 | 0.7221 | 0.3981 | 0.1562 | 0.035* | |
C17 | 0.7749 (3) | 0.45889 (16) | 0.27830 (13) | 0.0264 (4) | |
H17 | 0.6857 | 0.5045 | 0.2705 | 0.032* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0318 (3) | 0.0275 (2) | 0.0204 (2) | −0.0070 (2) | 0.00692 (19) | −0.00252 (17) |
S2 | 0.0341 (3) | 0.02419 (19) | 0.0212 (2) | 0.00549 (19) | 0.00813 (19) | 0.00134 (17) |
O1 | 0.0455 (9) | 0.0265 (7) | 0.0172 (6) | −0.0018 (6) | 0.0050 (6) | 0.0027 (5) |
O2 | 0.0382 (9) | 0.0363 (8) | 0.0188 (7) | −0.0070 (7) | 0.0064 (6) | −0.0036 (6) |
N1 | 0.0531 (12) | 0.0238 (8) | 0.0201 (8) | 0.0013 (8) | 0.0088 (8) | −0.0032 (6) |
N2 | 0.0332 (10) | 0.0307 (9) | 0.0260 (9) | 0.0007 (8) | 0.0054 (7) | 0.0039 (7) |
N3 | 0.0332 (9) | 0.0268 (8) | 0.0216 (8) | −0.0033 (7) | 0.0066 (7) | −0.0034 (7) |
C1 | 0.0197 (8) | 0.0249 (8) | 0.0181 (8) | 0.0014 (7) | 0.0023 (7) | 0.0000 (7) |
C2 | 0.0188 (8) | 0.0256 (8) | 0.0185 (9) | −0.0009 (7) | 0.0024 (7) | −0.0031 (7) |
C3 | 0.0270 (9) | 0.0290 (9) | 0.0223 (9) | −0.0009 (8) | 0.0053 (8) | −0.0054 (8) |
C4 | 0.0306 (11) | 0.0222 (9) | 0.0334 (11) | 0.0015 (8) | 0.0053 (9) | −0.0014 (8) |
C5 | 0.0282 (10) | 0.0287 (9) | 0.0253 (10) | 0.0008 (8) | 0.0050 (8) | 0.0060 (8) |
C6 | 0.0240 (10) | 0.0291 (9) | 0.0181 (9) | 0.0001 (7) | 0.0025 (8) | −0.0005 (7) |
C7 | 0.0210 (9) | 0.0301 (9) | 0.0201 (9) | −0.0019 (7) | 0.0030 (7) | −0.0010 (7) |
C8 | 0.0307 (10) | 0.0391 (11) | 0.0207 (10) | 0.0028 (9) | 0.0011 (8) | 0.0023 (8) |
C9 | 0.0249 (9) | 0.0349 (10) | 0.0244 (10) | −0.0004 (8) | 0.0033 (8) | −0.0007 (8) |
C10 | 0.0245 (9) | 0.0234 (9) | 0.0193 (8) | 0.0013 (7) | 0.0068 (7) | −0.0030 (7) |
C11 | 0.0233 (9) | 0.0259 (8) | 0.0209 (9) | 0.0013 (7) | 0.0035 (7) | −0.0009 (7) |
C12 | 0.0290 (10) | 0.0247 (9) | 0.0267 (10) | −0.0017 (7) | 0.0057 (8) | −0.0008 (7) |
C13 | 0.0270 (10) | 0.0199 (8) | 0.0190 (9) | −0.0005 (7) | 0.0092 (7) | 0.0015 (6) |
C14 | 0.0283 (10) | 0.0246 (8) | 0.0203 (9) | −0.0008 (7) | 0.0043 (8) | 0.0000 (7) |
C15 | 0.0291 (10) | 0.0258 (9) | 0.0257 (10) | 0.0015 (8) | 0.0069 (8) | 0.0004 (7) |
C16 | 0.0319 (10) | 0.0362 (10) | 0.0185 (9) | −0.0031 (8) | 0.0031 (8) | 0.0025 (8) |
C17 | 0.0276 (10) | 0.0319 (9) | 0.0202 (9) | 0.0027 (8) | 0.0068 (8) | 0.0047 (7) |
S1—C10 | 1.7762 (19) | C4—H4 | 0.9500 |
S1—S2 | 2.0297 (8) | C5—C6 | 1.376 (3) |
S2—C13 | 1.7761 (18) | C5—H5 | 0.9500 |
O1—C7 | 1.328 (2) | C6—H6 | 0.9500 |
O1—H1o | 0.8399 (10) | C8—C9 | 1.384 (3) |
O2—C7 | 1.215 (2) | C8—H8 | 0.9500 |
N1—C1 | 1.365 (2) | C9—C10 | 1.388 (3) |
N1—H1n | 0.8800 (11) | C9—H9 | 0.9500 |
N1—H2n | 0.8801 (10) | C10—C11 | 1.391 (3) |
N2—C12 | 1.332 (3) | C11—C12 | 1.394 (3) |
N2—C8 | 1.341 (3) | C11—H11 | 0.9500 |
N3—C16 | 1.332 (3) | C12—H12 | 0.9500 |
N3—C15 | 1.332 (3) | C13—C14 | 1.387 (3) |
C1—C6 | 1.407 (3) | C13—C17 | 1.396 (3) |
C1—C2 | 1.418 (2) | C14—C15 | 1.394 (3) |
C2—C3 | 1.407 (3) | C14—H14 | 0.9500 |
C2—C7 | 1.479 (2) | C15—H15 | 0.9500 |
C3—C4 | 1.377 (3) | C16—C17 | 1.385 (3) |
C3—H3 | 0.9500 | C16—H16 | 0.9500 |
C4—C5 | 1.396 (3) | C17—H17 | 0.9500 |
C10—S1—S2 | 105.22 (7) | N2—C8—H8 | 118.2 |
C13—S2—S1 | 105.12 (7) | C9—C8—H8 | 118.2 |
C7—O1—H1o | 112 (2) | C8—C9—C10 | 118.5 (2) |
C1—N1—H1n | 117.5 (15) | C8—C9—H9 | 120.8 |
C1—N1—H2n | 118.2 (15) | C10—C9—H9 | 120.8 |
H1n—N1—H2n | 119.4 (18) | C9—C10—C11 | 119.33 (18) |
C12—N2—C8 | 116.85 (18) | C9—C10—S1 | 115.41 (15) |
C16—N3—C15 | 117.96 (17) | C11—C10—S1 | 125.26 (16) |
N1—C1—C6 | 117.63 (17) | C10—C11—C12 | 117.17 (19) |
N1—C1—C2 | 124.29 (18) | C10—C11—H11 | 121.4 |
C6—C1—C2 | 118.07 (17) | C12—C11—H11 | 121.4 |
C3—C2—C1 | 118.91 (17) | N2—C12—C11 | 124.59 (19) |
C3—C2—C7 | 116.40 (16) | N2—C12—H12 | 117.7 |
C1—C2—C7 | 124.69 (17) | C11—C12—H12 | 117.7 |
C4—C3—C2 | 121.99 (18) | C14—C13—C17 | 119.32 (17) |
C4—C3—H3 | 119.0 | C14—C13—S2 | 124.98 (16) |
C2—C3—H3 | 119.0 | C17—C13—S2 | 115.70 (15) |
C3—C4—C5 | 118.82 (18) | C13—C14—C15 | 117.50 (19) |
C3—C4—H4 | 120.6 | C13—C14—H14 | 121.2 |
C5—C4—H4 | 120.6 | C15—C14—H14 | 121.3 |
C6—C5—C4 | 120.63 (18) | N3—C15—C14 | 123.7 (2) |
C6—C5—H5 | 119.7 | N3—C15—H15 | 118.1 |
C4—C5—H5 | 119.7 | C14—C15—H15 | 118.1 |
C5—C6—C1 | 121.56 (18) | N3—C16—C17 | 123.1 (2) |
C5—C6—H6 | 119.2 | N3—C16—H16 | 118.4 |
C1—C6—H6 | 119.2 | C17—C16—H16 | 118.4 |
O2—C7—O1 | 122.14 (18) | C16—C17—C13 | 118.30 (19) |
O2—C7—C2 | 123.34 (18) | C16—C17—H17 | 120.8 |
O1—C7—C2 | 114.52 (16) | C13—C17—H17 | 120.8 |
N2—C8—C9 | 123.6 (2) | ||
C10—S1—S2—C13 | −95.20 (9) | C8—C9—C10—C11 | −1.5 (3) |
N1—C1—C2—C3 | 177.7 (2) | C8—C9—C10—S1 | 178.27 (16) |
C6—C1—C2—C3 | −1.1 (3) | S2—S1—C10—C9 | −169.32 (13) |
N1—C1—C2—C7 | −3.1 (3) | S2—S1—C10—C11 | 10.46 (18) |
C6—C1—C2—C7 | 178.12 (18) | C9—C10—C11—C12 | 1.1 (3) |
C1—C2—C3—C4 | 0.5 (3) | S1—C10—C11—C12 | −178.70 (14) |
C7—C2—C3—C4 | −178.81 (18) | C8—N2—C12—C11 | −0.3 (3) |
C2—C3—C4—C5 | 0.3 (3) | C10—C11—C12—N2 | −0.1 (3) |
C3—C4—C5—C6 | −0.5 (3) | S1—S2—C13—C14 | 3.90 (18) |
C4—C5—C6—C1 | −0.2 (3) | S1—S2—C13—C17 | −175.51 (13) |
N1—C1—C6—C5 | −177.9 (2) | C17—C13—C14—C15 | −1.2 (3) |
C2—C1—C6—C5 | 1.0 (3) | S2—C13—C14—C15 | 179.40 (15) |
C3—C2—C7—O2 | −7.8 (3) | C16—N3—C15—C14 | 1.9 (3) |
C1—C2—C7—O2 | 172.92 (19) | C13—C14—C15—N3 | −0.6 (3) |
C3—C2—C7—O1 | 171.55 (19) | C15—N3—C16—C17 | −1.5 (3) |
C1—C2—C7—O1 | −7.7 (3) | N3—C16—C17—C13 | −0.2 (3) |
C12—N2—C8—C9 | −0.2 (3) | C14—C13—C17—C16 | 1.6 (3) |
N2—C8—C9—C10 | 1.1 (3) | S2—C13—C17—C16 | −178.97 (15) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H2n···O1 | 0.88 (2) | 2.04 (2) | 2.667 (2) | 128 (2) |
N1—H1n···N2i | 0.88 (1) | 2.15 (1) | 3.027 (3) | 173 (2) |
O1—H1o···N3ii | 0.84 (2) | 1.79 (2) | 2.621 (2) | 173 (3) |
C17—H17···O2iii | 0.95 | 2.42 | 3.251 (3) | 146 |
Symmetry codes: (i) x−1/2, −y+1/2, z−1/2; (ii) x−1/2, −y+1/2, z+1/2; (iii) x, −y+1, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | C7H7NO2·C10H8N2S2 |
Mr | 357.46 |
Crystal system, space group | Monoclinic, Cc |
Temperature (K) | 98 |
a, b, c (Å) | 8.636 (2), 12.728 (3), 15.688 (4) |
β (°) | 103.218 (4) |
V (Å3) | 1678.7 (7) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.33 |
Crystal size (mm) | 0.30 × 0.27 × 0.15 |
Data collection | |
Diffractometer | Rigaku AFC12K/SATURN724 CCD |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 3149, 3149, 3115 |
Rint | 0.000 |
(sin θ/λ)max (Å−1) | 0.650 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.031, 0.078, 1.03 |
No. of reflections | 3149 |
No. of parameters | 227 |
No. of restraints | 6 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.25, −0.23 |
Absolute structure | Nd |
Computer programs: CrystalClear (Molecular Structure Corporation & Rigaku, 2005), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEPII (Johnson, 1976) and DIAMOND (Brandenburg, 2006), publCIF (Westrip, 2010).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H2n···O1 | 0.88 (2) | 2.036 (18) | 2.667 (2) | 127.9 (15) |
N1—H1n···N2i | 0.881 (10) | 2.151 (12) | 3.027 (3) | 172.8 (19) |
O1—H1o···N3ii | 0.840 (18) | 1.79 (2) | 2.621 (2) | 173 (3) |
C17—H17···O2iii | 0.95 | 2.42 | 3.251 (3) | 146 |
Symmetry codes: (i) x−1/2, −y+1/2, z−1/2; (ii) x−1/2, −y+1/2, z+1/2; (iii) x, −y+1, z−1/2. |
Acknowledgements
The Ministry of Higher Education, Malaysia, is thanked for the award of a research grant (RG125/10AFR).
References
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In connection with recent co-crystallization experiments of carboxylic acids with pyridyl-N-containing molecules (Arman & Tiekink, 2010; Wardell & Tiekink, 2011; Arman et al., 2011), the 1:2 co-crystallization of 4-(pyridin-4-yldisulfanyl)pyridine and 2-aminobenzoic acid was investigated. This led to the isolation and characterization of the title 1:1 co-crystal, (I).
A single molecule of each of 4-(pyridin-4-yldisulfanyl)pyridine (Fig. 1), and 2-aminobenzoic acid (Fig. 2), comprise the crystallographic asymmetric unit of (I). The molecule is twisted with the 4-pyridyl rings being almost perpendicular to each other as seen in the value of the dihedral angle of 89.06 (10)°. The carboxylic acid residue is slightly twisted out of the plane of the benzene ring to which it is connected as seen in the C1—C2—C7—O1 torsion angle of -7.7 (3)°. This twist occurs despite the presence of an intramolecular N—H···O1 hydrogen bond (Table 1).
The most prominent feature of the crystal packing is the formation of supramolecular chains comprising alternating 4-(pyridin-4-yldisulfanyl)pyridine and 2-aminobenzoic acid molecules linked by O—H···N and N—H···N hydrogen bonds (Fig. 3 and Table 1). The chains pack into layers in the bc plane and are arranged so that pairs of chains face each other to allow for the formation of weak π–π interactions and for the interdigitation of the benzoic acid residues. The π–π interactions of 3.8489 (15) Å occur between the ring centroids of the (N2,C8–C12) and (N3,C13–C17)iii pyridyl rings (Fig. 4) [symmetry code (iii) x, -y + 1, z + 1/2]. Layers stack along the a axis, being connected by C—H···O interactions [Fig. 5 and Table 1].