organic compounds
4-Amino-3,5-bis(2-pyridyl)-4H-1,2,4-triazole–benzene-1,2,3-tricarboxylic acid–water (1/1/2)
aSchool of Biological and Chemical Engineering, Jiaxing University, Zhejiang Jiaxing 314001, People's Republic of China
*Correspondence e-mail: jxj1106@163.com
Cocrystallization of 4-amino-3,5-bis(2-pyridyl)-1,2,4-triazole (2-bpt) with hemimellitic acid (benzene-1,2,3-tricarboxylic acid) dihydrate (H3HMA·2H2O) produces the supramolecular title compound, C12H10N6·C9H6O6·2H2O. Intermolecular N—H⋯N hydrogen bonds are observed between the terminal pyridyl and amino groups of the 2-bpt molecule and the dihedral angles between the central ring and the pendant pyridine rings are 3.4 (7) and 13.8 (7)°. In the structure, homosynthons of graph set R22(8) are observed to form centrosymmetric H3HMA dimers, which are extended into a two-dimensional supramolecular layer via intermolecular O—H⋯N and C—H⋯O hydrogen bonds and π–π stacking interactions [centroid–centroid distance = 3.541 (3) Å]. In addition, interlayer uncoordinated water molecules connect the layers through O—H⋯O hydrogen bonds, generating a three-dimensional network.
Related literature
For background to the use of carboxylic acid in synthesis, see: Kuduva et al. (1999); Das et al. (2006). For the structure of trimesic acid, see: Biradha et al. (1998); Paz et al. (2003). For co-crystals of H3HMA, see: Dale et al. (2004); Du et al. (2005); For organic crystals of 4-amino-3,5-bis(2-pyridyl)-1,2,4-triazole (2-bpt), see: Mernari et al. (1998); Ramos Silva et al. (2008). For the preparation of 2-bpt, see: Bentiss et al. (1999).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2003); cell SAINT (Bruker, 2001); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 2005); software used to prepare material for publication: SHELXTL.
Supporting information
https://doi.org/10.1107/S1600536810010470/rz2426sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810010470/rz2426Isup2.hkl
A mixture of 2-bpt (Bentiss et al., 1999) (23.8 mg, 0.1 mmol), H3HMA.2H2O (24.6 mg, 0.1 mmol) and water (10 ml) was sealed in a Teflon-lined stainless steel vessel (20 ml), which was heated at 413 K for three days and then cooled to room temperature. Colourless block single crystals of the title compound were obtained in 52% yield (25.0 mg, based on 2-bpt). Anal. Calcd for C21H20N6O8: C, 52.07; H, 4.16, N, 17.35. Found: C, 52.16; H, 4.08, N, 17.25%. IR (cm-1): 3504s, 3275s, 1715vs, 1687vs, 1586s, 1559s, 1466s, 1412m, 1254vs, 1154s, 1076m, 1001s, 957m, 893m, 794s, 741s, 699m, 674s, 585m, 545m.
The water and amine H atoms were located in a difference Fourier map and refined with the O—H and N—H bond lengths constrained to 0.85 and 0.90 Å, respectively, and with Uiso(H) = 1.5Ueq(O) and 1.2Ueq(N). All other H atoms were placed at calculated positions and refined as riding, with C—H = 0.93 Å, O—H = 0.82 Å, and with Uiso(H) = 1.2Ueq(C) or 1.5Ueq(O).
Carboxylic acid is one of the most commonly used functional groups in designing specific organic solids (Kuduva et al., 1999; Das et al., 2006). Compared with the well studied trimesic acid (benzene-1,3,5-tricarboxylic acid, H3TMA; Biradha et al., 1998; Paz et al., 2003), its isomer hemimellitic acid (benzene-1,2,3-tricarboxylic acid, H3HMA) has received little attention, with only few
structures reported to date (Dale et al., 2004; Du et al., 2005). As regards the angular dipyridyl derivative 4-amino-3,5-bis(2-pyridyl)-1,2,4-triazole (2-bpt), it can possibly provide multiple supramolecular interaction sites for molecular recognition, but organic crystals in relation to this component has rarely been studied up to now (Mernari et al., 1998; Ramos Silva et al., 2008). Herein the of the title crystalline solid, 2-bpt.H3HMA.2H2O, is reported, which displays a 3-D supramolecular architecture and represents the new organic crystal for 2-bpt molecule.The π–π stacking interactions (centroid-centroid distance = 3.541 (3) Å) extend the chains into a 2-D layer. The lattice water molecules occupy the interspaces of adjacent layers. The molecule including the O8 oxygen atom forms interlayer O8—H8A···N2, O8—H8B···O2 and C14—H14···O8 interactions, within which a R22(7) synthon can be observed (Table 1); the water molecule including the O7 oxygen atom hydrogen-bonds adjacent layers and water molecules to finally afford a 3-D supramolecular structure (Table 1, Fig. 3). Examination of the interlayer solvent volume by PLATON (Spek, 2009) reveals a value of 81.0 Å3 (7.5% of the volume).
of the title compound (Fig. 1) contains one 2-bpt, one H3HMA acid and two lattice water molecules. The dihedral angle between the 2-bpt and H3HMA rings is 5.4 (4)°. The two pyridyl groups of 2-bpt deviate by 10.7 (7)° from coplanarity and form dihedral angels of 3.4 (7) and 13.8 (7)°, respectively, with the central triazolyl ring. In the H3HMA molecule, the O3/C4/O4 carboxyl group is nearly perpendicular to the benzene plane (dihedral angle 81.4 (7)°), while the corresponding angles for the O1/C1/O2 and O5/C6/O6 groups are 7.8 (1) and 22.1 (8)°, respectively. In the 2-bpt molecule, N5—H5A···N6 and N5—H5B···N1 intramolecular hydrogen interactions are observed, as expected, between the terminal pyridyl and amino groups (Table 1). The O5—C6—O6 carboxyl groups of centrosymmetrically related H3HMA molecules form strong intermolecular hydrogen bonds, affording a dimeric unit with homosynthon of graph set R22(8) (Table 1). Furthermore, the dimers connect adjacent 2-bpt molecules via the nearly perpendicular carboxyl groups (Table 1), generating a 1-D supramolecular array along the [010] direction (Fig. 2). In addition, intrachain C20—H20···O6 contacts (Table 1) andFor background to the use of carboxylic acid in synthesis, see: Kuduva et al. (1999); Das et al. (2006). For the structure of trimesic acid, see: Biradha et al. (1998); Paz et al. (2003). For co-crystals of H3HMA, see: Dale et al. (2004); Du et al. (2005); For organic crystals of 4-amino-3,5-bis(2-pyridyl)-1,2,4-triazole (2-bpt), see: Mernari et al. (1998); Ramos Silva et al. (2008). For the preparation of 2-bpt, see: Bentiss et al. (1999).
Data collection: APEX2 (Bruker, 2003); cell
SAINT (Bruker, 2001); data reduction: SAINT (Bruker, 2001); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 2005); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).Fig. 1. View of the molecular structure of the title compound, with displacement ellipsoids drawn at the 30% probability level (the dotted lines indicate intramolecular hydrogen bonds). | |
Fig. 2. Perspective view of the supramolecular array of the title compound extending along the [010] direction (intrachain π–π interactions and hydrogen bonds are shown as dashed lines). | |
Fig. 3. View of the 3-D supramolecular structure of the title compound (interchain π–π interactions and hydrogen bonds are shown as dashed lines). |
C12H10N6·C9H6O6·2H2O | Z = 2 |
Mr = 484.43 | F(000) = 504 |
Triclinic, P1 | Dx = 1.492 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 8.4266 (10) Å | Cell parameters from 2173 reflections |
b = 8.6317 (10) Å | θ = 2.8–25.9° |
c = 15.7318 (18) Å | µ = 0.12 mm−1 |
α = 75.152 (12)° | T = 294 K |
β = 77.179 (12)° | Block, colourless |
γ = 88.417 (13)° | 0.24 × 0.21 × 0.18 mm |
V = 1078.0 (2) Å3 |
Bruker APEXII CCD area-detector diffractometer | 3765 independent reflections |
Radiation source: fine-focus sealed tube | 2832 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.018 |
phi and ω scans | θmax = 25.0°, θmin = 2.4° |
Absorption correction: multi-scan (SADABS; Bruker, 2001) | h = −10→9 |
Tmin = 0.967, Tmax = 0.980 | k = −9→10 |
5932 measured reflections | l = −18→18 |
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)] = 0.037 | H-atom parameters constrained |
wR(F2) = 0.105 | w = 1/[σ2(Fo2) + (0.0552P)2 + 0.1197P] where P = (Fo2 + 2Fc2)/3 |
S = 1.05 | (Δ/σ)max < 0.001 |
3765 reflections | Δρmax = 0.18 e Å−3 |
320 parameters | Δρmin = −0.16 e Å−3 |
0 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.021 (2) |
C12H10N6·C9H6O6·2H2O | γ = 88.417 (13)° |
Mr = 484.43 | V = 1078.0 (2) Å3 |
Triclinic, P1 | Z = 2 |
a = 8.4266 (10) Å | Mo Kα radiation |
b = 8.6317 (10) Å | µ = 0.12 mm−1 |
c = 15.7318 (18) Å | T = 294 K |
α = 75.152 (12)° | 0.24 × 0.21 × 0.18 mm |
β = 77.179 (12)° |
Bruker APEXII CCD area-detector diffractometer | 3765 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2001) | 2832 reflections with I > 2σ(I) |
Tmin = 0.967, Tmax = 0.980 | Rint = 0.018 |
5932 measured reflections |
R[F2 > 2σ(F2)] = 0.037 | 0 restraints |
wR(F2) = 0.105 | H-atom parameters constrained |
S = 1.05 | Δρmax = 0.18 e Å−3 |
3765 reflections | Δρmin = −0.16 e Å−3 |
320 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 > 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 | −0.15210 (17) | 0.29442 (17) | 0.47310 (9) | 0.0579 (4) | |
H1 | −0.2077 | 0.2167 | 0.5064 | 0.087* | |
O2 | −0.05082 (17) | 0.11617 (16) | 0.39702 (9) | 0.0569 (4) | |
O3 | 0.02722 (15) | 0.19395 (14) | 0.20039 (9) | 0.0415 (3) | |
H3 | 0.0232 | 0.1036 | 0.1930 | 0.062* | |
O4 | 0.24886 (16) | 0.10468 (15) | 0.25232 (9) | 0.0477 (3) | |
O5 | 0.32592 (17) | 0.38341 (17) | 0.07961 (9) | 0.0548 (4) | |
H5 | 0.3873 | 0.3949 | 0.0299 | 0.082* | |
O6 | 0.48197 (16) | 0.58328 (16) | 0.08438 (9) | 0.0546 (4) | |
N1 | 0.7015 (2) | 0.42032 (18) | 0.25775 (11) | 0.0484 (4) | |
N2 | 0.83363 (18) | 0.82310 (17) | 0.24200 (10) | 0.0402 (4) | |
N3 | 0.95863 (17) | 0.90648 (17) | 0.17665 (10) | 0.0387 (4) | |
N4 | 0.91424 (17) | 0.68331 (16) | 0.14315 (9) | 0.0355 (3) | |
N5 | 0.9121 (2) | 0.56814 (18) | 0.09338 (10) | 0.0482 (4) | |
H5A | 1.0131 | 0.5743 | 0.0583 | 0.058* | |
H5B | 0.8885 | 0.4727 | 0.1340 | 0.058* | |
N6 | 1.18042 (19) | 0.76103 (18) | −0.01199 (10) | 0.0462 (4) | |
C1 | −0.0538 (2) | 0.2505 (2) | 0.40647 (12) | 0.0395 (4) | |
C2 | 0.0538 (2) | 0.3858 (2) | 0.34279 (11) | 0.0353 (4) | |
C3 | 0.1524 (2) | 0.3644 (2) | 0.26222 (11) | 0.0332 (4) | |
C4 | 0.1486 (2) | 0.2056 (2) | 0.23849 (11) | 0.0353 (4) | |
C5 | 0.2564 (2) | 0.4922 (2) | 0.20656 (11) | 0.0341 (4) | |
C6 | 0.3642 (2) | 0.4873 (2) | 0.11777 (12) | 0.0385 (4) | |
C7 | 0.2594 (2) | 0.6357 (2) | 0.23120 (12) | 0.0410 (4) | |
H7 | 0.3308 | 0.7187 | 0.1945 | 0.049* | |
C8 | 0.1584 (2) | 0.6570 (2) | 0.30912 (12) | 0.0435 (5) | |
H8 | 0.1589 | 0.7545 | 0.3240 | 0.052* | |
C9 | 0.0569 (2) | 0.5320 (2) | 0.36447 (12) | 0.0415 (4) | |
H9 | −0.0108 | 0.5455 | 0.4173 | 0.050* | |
C10 | 0.6861 (2) | 0.5630 (2) | 0.27668 (11) | 0.0370 (4) | |
C11 | 0.5973 (3) | 0.3031 (2) | 0.31086 (14) | 0.0565 (6) | |
H11 | 0.6059 | 0.2032 | 0.2984 | 0.068* | |
C12 | 0.4780 (3) | 0.3209 (2) | 0.38293 (13) | 0.0529 (5) | |
H12 | 0.4092 | 0.2351 | 0.4185 | 0.063* | |
C13 | 0.4633 (2) | 0.4678 (3) | 0.40076 (13) | 0.0512 (5) | |
H13 | 0.3834 | 0.4843 | 0.4486 | 0.061* | |
C14 | 0.5686 (2) | 0.5914 (2) | 0.34694 (13) | 0.0494 (5) | |
H14 | 0.5606 | 0.6926 | 0.3578 | 0.059* | |
C15 | 0.8071 (2) | 0.6891 (2) | 0.22104 (11) | 0.0353 (4) | |
C16 | 1.0074 (2) | 0.8208 (2) | 0.11698 (11) | 0.0347 (4) | |
C17 | 1.1425 (2) | 0.8672 (2) | 0.03777 (11) | 0.0350 (4) | |
C18 | 1.3039 (2) | 0.8006 (3) | −0.08423 (13) | 0.0528 (5) | |
H18 | 1.3313 | 0.7281 | −0.1194 | 0.063* | |
C19 | 1.3924 (2) | 0.9422 (3) | −0.10926 (14) | 0.0516 (5) | |
H19 | 1.4777 | 0.9646 | −0.1600 | 0.062* | |
C20 | 1.3524 (2) | 1.0498 (3) | −0.05799 (13) | 0.0499 (5) | |
H20 | 1.4103 | 1.1469 | −0.0736 | 0.060* | |
C21 | 1.2256 (2) | 1.0132 (2) | 0.01692 (13) | 0.0454 (5) | |
H21 | 1.1965 | 1.0847 | 0.0526 | 0.054* | |
O7 | 0.65104 (17) | 0.06876 (17) | 0.58459 (10) | 0.0643 (4) | |
H7A | 0.5494 | 0.0662 | 0.5868 | 0.096* | |
H7B | 0.6834 | 0.0121 | 0.6299 | 0.096* | |
O8 | 0.68068 (17) | 0.91230 (18) | 0.40477 (10) | 0.0669 (5) | |
H8A | 0.7248 | 0.8889 | 0.3557 | 0.100* | |
H8B | 0.7366 | 0.9709 | 0.4240 | 0.100* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0631 (9) | 0.0537 (9) | 0.0466 (8) | −0.0169 (7) | 0.0181 (7) | −0.0186 (7) |
O2 | 0.0668 (9) | 0.0442 (8) | 0.0499 (8) | −0.0155 (7) | 0.0125 (7) | −0.0144 (7) |
O3 | 0.0465 (7) | 0.0343 (7) | 0.0474 (7) | −0.0019 (6) | −0.0106 (6) | −0.0166 (6) |
O4 | 0.0462 (8) | 0.0411 (8) | 0.0517 (8) | 0.0069 (6) | −0.0058 (6) | −0.0096 (6) |
O5 | 0.0656 (9) | 0.0533 (9) | 0.0392 (8) | −0.0188 (7) | 0.0109 (6) | −0.0179 (7) |
O6 | 0.0509 (8) | 0.0587 (9) | 0.0459 (8) | −0.0208 (7) | 0.0083 (6) | −0.0128 (7) |
N1 | 0.0552 (10) | 0.0360 (9) | 0.0493 (10) | −0.0050 (8) | −0.0032 (8) | −0.0091 (7) |
N2 | 0.0413 (8) | 0.0344 (8) | 0.0413 (9) | −0.0055 (7) | 0.0000 (7) | −0.0108 (7) |
N3 | 0.0408 (8) | 0.0327 (8) | 0.0403 (8) | −0.0040 (7) | −0.0027 (7) | −0.0103 (7) |
N4 | 0.0392 (8) | 0.0311 (8) | 0.0369 (8) | −0.0028 (6) | −0.0059 (6) | −0.0115 (6) |
N5 | 0.0577 (10) | 0.0433 (9) | 0.0448 (9) | −0.0134 (8) | −0.0009 (8) | −0.0210 (7) |
N6 | 0.0503 (9) | 0.0411 (9) | 0.0434 (9) | −0.0009 (7) | 0.0023 (7) | −0.0147 (7) |
C1 | 0.0402 (10) | 0.0446 (11) | 0.0321 (10) | −0.0070 (8) | −0.0016 (8) | −0.0114 (8) |
C2 | 0.0355 (9) | 0.0389 (10) | 0.0318 (9) | −0.0044 (8) | −0.0067 (7) | −0.0096 (8) |
C3 | 0.0327 (9) | 0.0347 (10) | 0.0316 (9) | −0.0026 (7) | −0.0065 (7) | −0.0074 (7) |
C4 | 0.0368 (10) | 0.0344 (10) | 0.0300 (9) | −0.0030 (8) | 0.0004 (8) | −0.0063 (7) |
C5 | 0.0335 (9) | 0.0365 (10) | 0.0311 (9) | −0.0025 (8) | −0.0066 (7) | −0.0069 (7) |
C6 | 0.0400 (10) | 0.0364 (10) | 0.0353 (10) | −0.0053 (8) | −0.0039 (8) | −0.0055 (8) |
C7 | 0.0432 (10) | 0.0394 (11) | 0.0382 (10) | −0.0106 (8) | −0.0072 (8) | −0.0066 (8) |
C8 | 0.0524 (11) | 0.0391 (11) | 0.0426 (11) | −0.0062 (9) | −0.0104 (9) | −0.0159 (9) |
C9 | 0.0434 (10) | 0.0495 (12) | 0.0336 (10) | −0.0051 (9) | −0.0047 (8) | −0.0166 (8) |
C10 | 0.0384 (10) | 0.0349 (10) | 0.0367 (10) | −0.0023 (8) | −0.0083 (8) | −0.0069 (8) |
C11 | 0.0714 (15) | 0.0356 (11) | 0.0556 (13) | −0.0132 (10) | −0.0043 (11) | −0.0066 (9) |
C12 | 0.0592 (13) | 0.0483 (12) | 0.0446 (12) | −0.0186 (10) | −0.0076 (10) | −0.0017 (9) |
C13 | 0.0458 (11) | 0.0630 (14) | 0.0423 (11) | −0.0128 (10) | −0.0021 (9) | −0.0141 (10) |
C14 | 0.0471 (11) | 0.0468 (12) | 0.0525 (12) | −0.0096 (9) | 0.0001 (9) | −0.0178 (10) |
C15 | 0.0350 (9) | 0.0324 (10) | 0.0375 (10) | −0.0007 (8) | −0.0062 (8) | −0.0087 (8) |
C16 | 0.0368 (9) | 0.0290 (9) | 0.0380 (10) | −0.0018 (8) | −0.0081 (8) | −0.0081 (8) |
C17 | 0.0354 (9) | 0.0335 (10) | 0.0351 (9) | 0.0010 (8) | −0.0082 (7) | −0.0069 (8) |
C18 | 0.0558 (12) | 0.0521 (13) | 0.0470 (12) | 0.0038 (10) | 0.0016 (10) | −0.0181 (10) |
C19 | 0.0411 (11) | 0.0606 (14) | 0.0463 (12) | −0.0011 (10) | 0.0005 (9) | −0.0100 (10) |
C20 | 0.0399 (11) | 0.0532 (12) | 0.0516 (12) | −0.0117 (9) | −0.0026 (9) | −0.0099 (10) |
C21 | 0.0430 (11) | 0.0461 (11) | 0.0466 (11) | −0.0055 (9) | −0.0032 (9) | −0.0160 (9) |
O7 | 0.0588 (9) | 0.0635 (10) | 0.0571 (9) | −0.0175 (8) | −0.0048 (7) | 0.0036 (7) |
O8 | 0.0636 (10) | 0.0714 (10) | 0.0649 (10) | −0.0227 (8) | 0.0080 (8) | −0.0329 (8) |
O1—C1 | 1.315 (2) | C7—C8 | 1.380 (2) |
O1—H1 | 0.8200 | C7—H7 | 0.9300 |
O2—C1 | 1.205 (2) | C8—C9 | 1.376 (2) |
O3—C4 | 1.313 (2) | C8—H8 | 0.9300 |
O3—H3 | 0.8200 | C9—H9 | 0.9300 |
O4—C4 | 1.210 (2) | C10—C14 | 1.379 (3) |
O5—C6 | 1.283 (2) | C10—C15 | 1.472 (2) |
O5—H5 | 0.8200 | C11—C12 | 1.377 (3) |
O6—C6 | 1.240 (2) | C11—H11 | 0.9300 |
N1—C11 | 1.335 (2) | C12—C13 | 1.364 (3) |
N1—C10 | 1.336 (2) | C12—H12 | 0.9300 |
N2—C15 | 1.319 (2) | C13—C14 | 1.378 (3) |
N2—N3 | 1.3661 (19) | C13—H13 | 0.9300 |
N3—C16 | 1.328 (2) | C14—H14 | 0.9300 |
N4—C16 | 1.361 (2) | C16—C17 | 1.466 (2) |
N4—C15 | 1.363 (2) | C17—C21 | 1.386 (2) |
N4—N5 | 1.4169 (19) | C18—C19 | 1.370 (3) |
N5—H5A | 0.9000 | C18—H18 | 0.9300 |
N5—H5B | 0.9000 | C19—C20 | 1.369 (3) |
N6—C18 | 1.337 (2) | C19—H19 | 0.9300 |
N6—C17 | 1.340 (2) | C20—C21 | 1.378 (3) |
C1—C2 | 1.498 (2) | C20—H20 | 0.9300 |
C2—C9 | 1.391 (2) | C21—H21 | 0.9300 |
C2—C3 | 1.406 (2) | O7—H7A | 0.8500 |
C3—C5 | 1.404 (2) | O7—H7B | 0.8499 |
C3—C4 | 1.513 (2) | O8—H8A | 0.8510 |
C5—C7 | 1.392 (2) | O8—H8B | 0.8502 |
C5—C6 | 1.498 (2) | ||
C1—O1—H1 | 109.5 | C2—C9—H9 | 119.4 |
C4—O3—H3 | 109.5 | N1—C10—C14 | 122.72 (16) |
C6—O5—H5 | 109.5 | N1—C10—C15 | 116.49 (15) |
C11—N1—C10 | 116.81 (16) | C14—C10—C15 | 120.73 (16) |
C15—N2—N3 | 107.75 (13) | N1—C11—C12 | 124.13 (19) |
C16—N3—N2 | 108.01 (13) | N1—C11—H11 | 117.9 |
C16—N4—C15 | 106.25 (14) | C12—C11—H11 | 117.9 |
C16—N4—N5 | 127.04 (14) | C13—C12—C11 | 118.18 (18) |
C15—N4—N5 | 126.14 (13) | C13—C12—H12 | 120.9 |
N4—N5—H5A | 104.7 | C11—C12—H12 | 120.9 |
N4—N5—H5B | 106.5 | C12—C13—C14 | 119.09 (19) |
H5A—N5—H5B | 112.9 | C12—C13—H13 | 120.5 |
C18—N6—C17 | 117.34 (16) | C14—C13—H13 | 120.5 |
O2—C1—O1 | 123.81 (16) | C13—C14—C10 | 119.07 (18) |
O2—C1—C2 | 123.40 (16) | C13—C14—H14 | 120.5 |
O1—C1—C2 | 112.79 (16) | C10—C14—H14 | 120.5 |
C9—C2—C3 | 120.26 (16) | N2—C15—N4 | 109.31 (14) |
C9—C2—C1 | 119.61 (15) | N2—C15—C10 | 124.55 (15) |
C3—C2—C1 | 120.12 (15) | N4—C15—C10 | 126.07 (15) |
C5—C3—C2 | 118.13 (15) | N3—C16—N4 | 108.69 (14) |
C5—C3—C4 | 121.57 (14) | N3—C16—C17 | 124.82 (15) |
C2—C3—C4 | 120.28 (14) | N4—C16—C17 | 126.47 (15) |
O4—C4—O3 | 125.30 (16) | N6—C17—C21 | 122.64 (16) |
O4—C4—C3 | 122.76 (16) | N6—C17—C16 | 116.38 (15) |
O3—C4—C3 | 111.93 (15) | C21—C17—C16 | 120.97 (16) |
C7—C5—C3 | 120.19 (15) | N6—C18—C19 | 123.60 (18) |
C7—C5—C6 | 116.12 (15) | N6—C18—H18 | 118.2 |
C3—C5—C6 | 123.66 (15) | C19—C18—H18 | 118.2 |
O6—C6—O5 | 123.63 (16) | C20—C19—C18 | 118.55 (18) |
O6—C6—C5 | 119.51 (16) | C20—C19—H19 | 120.7 |
O5—C6—C5 | 116.85 (14) | C18—C19—H19 | 120.7 |
C8—C7—C5 | 121.14 (16) | C19—C20—C21 | 119.48 (18) |
C8—C7—H7 | 119.4 | C19—C20—H20 | 120.3 |
C5—C7—H7 | 119.4 | C21—C20—H20 | 120.3 |
C9—C8—C7 | 119.08 (17) | C20—C21—C17 | 118.39 (18) |
C9—C8—H8 | 120.5 | C20—C21—H21 | 120.8 |
C7—C8—H8 | 120.5 | C17—C21—H21 | 120.8 |
C8—C9—C2 | 121.15 (16) | H7A—O7—H7B | 117.1 |
C8—C9—H9 | 119.4 | H8A—O8—H8B | 117.1 |
C15—N2—N3—C16 | −0.51 (19) | C12—C13—C14—C10 | −0.1 (3) |
O2—C1—C2—C9 | −172.13 (19) | N1—C10—C14—C13 | 0.7 (3) |
O1—C1—C2—C9 | 8.4 (2) | C15—C10—C14—C13 | −176.28 (18) |
O2—C1—C2—C3 | 7.0 (3) | N3—N2—C15—N4 | 0.5 (2) |
O1—C1—C2—C3 | −172.47 (16) | N3—N2—C15—C10 | 177.44 (16) |
C9—C2—C3—C5 | 1.9 (3) | C16—N4—C15—N2 | −0.29 (19) |
C1—C2—C3—C5 | −177.24 (15) | N5—N4—C15—N2 | −172.11 (16) |
C9—C2—C3—C4 | −179.82 (16) | C16—N4—C15—C10 | −177.18 (17) |
C1—C2—C3—C4 | 1.0 (2) | N5—N4—C15—C10 | 11.0 (3) |
C5—C3—C4—O4 | 80.1 (2) | N1—C10—C15—N2 | −164.14 (17) |
C2—C3—C4—O4 | −98.1 (2) | C14—C10—C15—N2 | 13.0 (3) |
C5—C3—C4—O3 | −98.72 (18) | N1—C10—C15—N4 | 12.3 (3) |
C2—C3—C4—O3 | 83.09 (19) | C14—C10—C15—N4 | −170.58 (18) |
C2—C3—C5—C7 | −0.4 (3) | N2—N3—C16—N4 | 0.33 (19) |
C4—C3—C5—C7 | −178.66 (17) | N2—N3—C16—C17 | −178.23 (16) |
C2—C3—C5—C6 | −178.20 (16) | C15—N4—C16—N3 | −0.03 (19) |
C4—C3—C5—C6 | 3.6 (3) | N5—N4—C16—N3 | 171.69 (16) |
C7—C5—C6—O6 | 21.5 (3) | C15—N4—C16—C17 | 178.50 (17) |
C3—C5—C6—O6 | −160.65 (17) | N5—N4—C16—C17 | −9.8 (3) |
C7—C5—C6—O5 | −157.19 (17) | C18—N6—C17—C21 | 0.0 (3) |
C3—C5—C6—O5 | 20.7 (3) | C18—N6—C17—C16 | −179.59 (17) |
C3—C5—C7—C8 | −1.6 (3) | N3—C16—C17—N6 | 176.17 (17) |
C6—C5—C7—C8 | 176.36 (16) | N4—C16—C17—N6 | −2.1 (3) |
C5—C7—C8—C9 | 2.0 (3) | N3—C16—C17—C21 | −3.5 (3) |
C7—C8—C9—C2 | −0.5 (3) | N4—C16—C17—C21 | 178.23 (17) |
C3—C2—C9—C8 | −1.5 (3) | C17—N6—C18—C19 | 0.1 (3) |
C1—C2—C9—C8 | 177.70 (17) | N6—C18—C19—C20 | −0.2 (3) |
C11—N1—C10—C14 | −0.4 (3) | C18—C19—C20—C21 | 0.1 (3) |
C11—N1—C10—C15 | 176.69 (17) | C19—C20—C21—C17 | 0.0 (3) |
C10—N1—C11—C12 | −0.4 (3) | N6—C17—C21—C20 | −0.1 (3) |
N1—C11—C12—C13 | 0.9 (3) | C16—C17—C21—C20 | 179.49 (17) |
C11—C12—C13—C14 | −0.6 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O7i | 0.82 | 1.79 | 2.600 (2) | 171 |
O3—H3···N3ii | 0.82 | 1.90 | 2.698 (2) | 166 |
O5—H5···O6iii | 0.82 | 1.85 | 2.674 (2) | 177 |
N5—H5A···N6 | 0.90 | 2.08 | 2.786 (2) | 134 |
N5—H5B···N1 | 0.90 | 2.17 | 2.804 (2) | 127 |
O7—H7A···O8iv | 0.85 | 1.92 | 2.766 (2) | 172 |
O7—H7B···O4v | 0.85 | 2.06 | 2.908 (2) | 173 |
O8—H8A···N2 | 0.85 | 2.03 | 2.881 (2) | 177 |
O8—H8B···O2vi | 0.85 | 2.12 | 2.867 (2) | 147 |
C14—H14···O8 | 0.93 | 2.51 | 3.348 (2) | 149 |
C19—H19···O4vii | 0.93 | 2.58 | 3.427 (2) | 152 |
C20—H20···O6viii | 0.93 | 2.47 | 3.386 (3) | 167 |
Symmetry codes: (i) x−1, y, z; (ii) x−1, y−1, z; (iii) −x+1, −y+1, −z; (iv) −x+1, −y+1, −z+1; (v) −x+1, −y, −z+1; (vi) x+1, y+1, z; (vii) −x+2, −y+1, −z; (viii) −x+2, −y+2, −z. |
Experimental details
Crystal data | |
Chemical formula | C12H10N6·C9H6O6·2H2O |
Mr | 484.43 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 294 |
a, b, c (Å) | 8.4266 (10), 8.6317 (10), 15.7318 (18) |
α, β, γ (°) | 75.152 (12), 77.179 (12), 88.417 (13) |
V (Å3) | 1078.0 (2) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.12 |
Crystal size (mm) | 0.24 × 0.21 × 0.18 |
Data collection | |
Diffractometer | Bruker APEXII CCD area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 2001) |
Tmin, Tmax | 0.967, 0.980 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5932, 3765, 2832 |
Rint | 0.018 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.037, 0.105, 1.05 |
No. of reflections | 3765 |
No. of parameters | 320 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.18, −0.16 |
Computer programs: APEX2 (Bruker, 2003), SAINT (Bruker, 2001), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008) and DIAMOND (Brandenburg, 2005), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O7i | 0.82 | 1.79 | 2.600 (2) | 171 |
O3—H3···N3ii | 0.82 | 1.90 | 2.698 (2) | 166 |
O5—H5···O6iii | 0.82 | 1.85 | 2.674 (2) | 177 |
N5—H5A···N6 | 0.90 | 2.08 | 2.786 (2) | 134 |
N5—H5B···N1 | 0.90 | 2.17 | 2.804 (2) | 127 |
O7—H7A···O8iv | 0.85 | 1.92 | 2.766 (2) | 172 |
O7—H7B···O4v | 0.85 | 2.06 | 2.908 (2) | 173 |
O8—H8A···N2 | 0.85 | 2.03 | 2.881 (2) | 177 |
O8—H8B···O2vi | 0.85 | 2.12 | 2.867 (2) | 147 |
C14—H14···O8 | 0.93 | 2.51 | 3.348 (2) | 149 |
C19—H19···O4vii | 0.93 | 2.58 | 3.427 (2) | 152 |
C20—H20···O6viii | 0.93 | 2.47 | 3.386 (3) | 167 |
Symmetry codes: (i) x−1, y, z; (ii) x−1, y−1, z; (iii) −x+1, −y+1, −z; (iv) −x+1, −y+1, −z+1; (v) −x+1, −y, −z+1; (vi) x+1, y+1, z; (vii) −x+2, −y+1, −z; (viii) −x+2, −y+2, −z. |
Acknowledgements
The author gratefully acknowledges the financial support of Tianjin Normal University and Jiaxing University.
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.
Carboxylic acid is one of the most commonly used functional groups in designing specific organic solids (Kuduva et al., 1999; Das et al., 2006). Compared with the well studied trimesic acid (benzene-1,3,5-tricarboxylic acid, H3TMA; Biradha et al., 1998; Paz et al., 2003), its isomer hemimellitic acid (benzene-1,2,3-tricarboxylic acid, H3HMA) has received little attention, with only few co-crystal structures reported to date (Dale et al., 2004; Du et al., 2005). As regards the angular dipyridyl derivative 4-amino-3,5-bis(2-pyridyl)-1,2,4-triazole (2-bpt), it can possibly provide multiple supramolecular interaction sites for molecular recognition, but organic crystals in relation to this component has rarely been studied up to now (Mernari et al., 1998; Ramos Silva et al., 2008). Herein the crystal structure of the title crystalline solid, 2-bpt.H3HMA.2H2O, is reported, which displays a 3-D supramolecular architecture and represents the new organic crystal for 2-bpt molecule.
The asymmetric unit of the title compound (Fig. 1) contains one 2-bpt, one H3HMA acid and two lattice water molecules. The dihedral angle between the 2-bpt and H3HMA rings is 5.4 (4)°. The two pyridyl groups of 2-bpt deviate by 10.7 (7)° from coplanarity and form dihedral angels of 3.4 (7) and 13.8 (7)°, respectively, with the central triazolyl ring. In the H3HMA molecule, the O3/C4/O4 carboxyl group is nearly perpendicular to the benzene plane (dihedral angle 81.4 (7)°), while the corresponding angles for the O1/C1/O2 and O5/C6/O6 groups are 7.8 (1) and 22.1 (8)°, respectively. In the 2-bpt molecule, N5—H5A···N6 and N5—H5B···N1 intramolecular hydrogen interactions are observed, as expected, between the terminal pyridyl and amino groups (Table 1). The O5—C6—O6 carboxyl groups of centrosymmetrically related H3HMA molecules form strong intermolecular hydrogen bonds, affording a dimeric unit with homosynthon of graph set R22(8) (Table 1). Furthermore, the dimers connect adjacent 2-bpt molecules via the nearly perpendicular carboxyl groups (Table 1), generating a 1-D supramolecular array along the [010] direction (Fig. 2). In addition, intrachain C20—H20···O6 contacts (Table 1) and π–π stacking interactions (centroid-centroid distance = 3.541 (3) Å) extend the chains into a 2-D layer. The lattice water molecules occupy the interspaces of adjacent layers. The molecule including the O8 oxygen atom forms interlayer O8—H8A···N2, O8—H8B···O2 and C14—H14···O8 interactions, within which a R22(7) synthon can be observed (Table 1); the water molecule including the O7 oxygen atom hydrogen-bonds adjacent layers and water molecules to finally afford a 3-D supramolecular structure (Table 1, Fig. 3). Examination of the interlayer solvent volume by PLATON (Spek, 2009) reveals a value of 81.0 Å3 (7.5% of the unit cell volume).