organic compounds
N,N′-Bis(pyridin-2-yl)benzene-1,4-diamine–naphthalene (2/1)
aFaculty of Chemistry, Adam Mickiewicz University, 60-780 Poznań, Poland
*Correspondence e-mail: magdan@amu.edu.pl
The 10H8·2C16H14N4, consists of one molecule of N,N′-bis(pyridin-2-yl)benzene-1,4-diamine (PDAB) and one half of the centrosymmetric naphthalene molecule. The PDAB molecule adopts a non-planar conformation with an E configuration at the two partially double exo C N bonds of the 2-pyridylamine units. In the crystal, N—H⋯N hydrogen bonds between the PDAB molecules generate a cyclic R22(8) motif, leading to the formation of PDAB tapes extending along [100]. The tapes are arranged into (010) layers and the naphthalene molecules are enclosed in cavities formed between the PDAB layers.
of the title compound, CRelated literature
For the structures of polymorphic forms of N,N′-di(pyridin-2-yl)benzene-1,4-diamine, see: Bensemann et al. (2002); Wicher & Gdaniec (2011a). For the structures of N,N′-di(pyridin-2-yl)benzene-1,4-diamine co-crystals with phenazine and quinoxaline, see: Gdaniec et al. (2005); Wicher & Gdaniec (2011b).
Experimental
Crystal data
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Refinement
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Data collection: CrysAlis PRO (Agilent, 2010); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SIR2004 (Burla et al., 2005); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and Mercury (Macrae et al., 2006); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S1600536811047519/rz2666sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811047519/rz2666Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536811047519/rz2666Isup3.cml
N,N'-Di(pyridin-2-yl)benzene-1,4-diamine (0.03 g, 0.11 mmol) and naphthalene (0.014 g, 0.11 mmol) were dissolved in 0.75 ml of butanone and placed in a closed plastic vial. After a few days, when butanone solution almost completely evaporated, colourless, plate-shaped crystals were obtained.
H atoms of the N—H groups were located in difference electron density maps. N—H bond lengths were standardized to 0.90 Å and Uiso(H) values were constrained to 1.2Ueq(N). All other H atoms were initially identified in difference electron density maps but were placed at calculated positions, with C—H = 0.95 Å, and were refined as riding on their carrier atoms, with Uiso(H) = 1.2Ueq(C).
N,N'-Di(pyridin-2-yl)benzene-1,4-diamine (PDAB) is a very versatile supramolecular reagent (Bensemann et al., 2002; Gdaniec et al., 2005). Recently we have shown that this compound can form 2:1 cocrystals with an aromatic heterobase quinoxaline (Wicher & Gdaniec, 2011b). In these cocrystals PDAB molecules were organized into hydrogen-bonded tapes with N—H···N hydrogen bonds occurring between self-complementary 2-pyridylamine groups. The quinoxaline molecule enclosed in a centrosymmetric cage, due to disorder, simulated very well the naphthalene molecule. We have concluded that PDAB when cocrystalized with naphthalene should form
Indeed, cocrystals of PDAB with naphthalene with the 2:1 component ratio were obtained, however, to our surprise, they were not isostructural with their quinoxaline analogue.The title complex is shown in Fig. 1. The PDAB molecule is nonplanar and adopts an E,E form that promotes the formation of a cyclic R22(8) motif via N—H···N hydrogen bond between the self-complementary 2-pyridylamine units (Table 1). These cyclic motifs assemble PDAB molecules into tapes extending along [1 0 0]. The structure of the tape is very similar to that formed in the cocrystal with quinoxaline, however the arrangement of the tapes is different. In the cocrystal with quinoxaline the tapes were arranged into pairs via aromatic π···π stacking interactions, whereas in the title cocrystal they are arranged into (0 1 0) layers with a short C–H···C contact [H12···C9i 2.79 Å, <C12–H12···C9i 171°; symmetry code (i): x, 0.5 - y, 1/2 + z] occurring between the PDAB molecules. The naphthalene molecules are enclosed in cages formed between adjacent (0 1 0) layers where they also form short C—H···C contacts with PDAB (H17···C21i 2.78 Å, <C17–H17···C21i137°; H23···C10 2.81 Å, <C23–H23···C10 147°; symmetry code (i): x - 1, 0.5 - y, z - 1/2).
Looking for the reason for this structural alteration we have noticed that in the cocrystal with quinoxaline the guest molecule enclosed in a cavity forms with PDAB one short H···H contact of 2.09 Å. In the case of naphthalene there would be two such contacts, most probably repulsive in their nature, and therefore sufficiently destabilizing the
for it being rebuild.For the structures of polymorphic forms of N,N'-di(pyridin-2-yl)benzene-1,4-diamine, see: Bensemann et al. (2002); Wicher & Gdaniec (2011a). For the structures of N,N'-di(pyridin-2-yl)benzene-1,4-diamine co-crystals with phenazine and quinoxaline, see: Gdaniec et al. (2005); Wicher & Gdaniec (2011b).
Data collection: CrysAlis PRO (Agilent, 2010); cell
CrysAlis PRO (Agilent, 2010); data reduction: CrysAlis PRO (Agilent, 2010); program(s) used to solve structure: SIR2004 (Burla et al., 2005); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and Mercury (Macrae et al., 2006); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).C10H8·2C16H14N4 | F(000) = 688 |
Mr = 652.78 | Dx = 1.313 Mg m−3 |
Monoclinic, P21/c | Cu Kα radiation, λ = 1.54184 Å |
Hall symbol: -P 2ybc | Cell parameters from 7079 reflections |
a = 9.2224 (1) Å | θ = 3.9–75.7° |
b = 22.8371 (2) Å | µ = 0.63 mm−1 |
c = 8.8760 (1) Å | T = 130 K |
β = 117.936 (2)° | Plate, colourless |
V = 1651.56 (3) Å3 | 0.20 × 0.15 × 0.05 mm |
Z = 2 |
Oxford Diffraction SuperNova diffractometer | 3020 independent reflections |
Radiation source: Nova Cu X-ray Source | 2671 reflections with I > 2/s(I) |
Mirror monochromator | Rint = 0.019 |
ω scans | θmax = 68.2°, θmin = 6.7° |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2010) | h = −11→8 |
Tmin = 0.931, Tmax = 1.000 | k = −27→20 |
9878 measured reflections | l = −9→10 |
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)] = 0.033 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.091 | H-atom parameters constrained |
S = 1.05 | w = 1/[σ2(Fo2) + (0.0529P)2 + 0.2963P] where P = (Fo2 + 2Fc2)/3 |
3020 reflections | (Δ/σ)max < 0.001 |
226 parameters | Δρmax = 0.17 e Å−3 |
0 restraints | Δρmin = −0.19 e Å−3 |
C10H8·2C16H14N4 | V = 1651.56 (3) Å3 |
Mr = 652.78 | Z = 2 |
Monoclinic, P21/c | Cu Kα radiation |
a = 9.2224 (1) Å | µ = 0.63 mm−1 |
b = 22.8371 (2) Å | T = 130 K |
c = 8.8760 (1) Å | 0.20 × 0.15 × 0.05 mm |
β = 117.936 (2)° |
Oxford Diffraction SuperNova diffractometer | 3020 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2010) | 2671 reflections with I > 2/s(I) |
Tmin = 0.931, Tmax = 1.000 | Rint = 0.019 |
9878 measured reflections |
R[F2 > 2σ(F2)] = 0.033 | 0 restraints |
wR(F2) = 0.091 | H-atom parameters constrained |
S = 1.05 | Δρmax = 0.17 e Å−3 |
3020 reflections | Δρmin = −0.19 e Å−3 |
226 parameters |
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 | ||
N2 | 0.87262 (11) | 0.11061 (4) | 0.09736 (12) | 0.0241 (2) | |
N7 | 0.66539 (11) | 0.16648 (4) | 0.09585 (12) | 0.0245 (2) | |
H7N | 0.7317 | 0.1969 | 0.1069 | 0.029* | |
N14 | 0.06413 (11) | 0.21713 (4) | 0.08789 (13) | 0.0261 (2) | |
H14N | 0.0015 | 0.1862 | 0.0829 | 0.031* | |
N16 | −0.13109 (11) | 0.27154 (4) | 0.11442 (12) | 0.0244 (2) | |
C1 | 0.73812 (12) | 0.11242 (5) | 0.11994 (13) | 0.0210 (2) | |
C3 | 0.95160 (13) | 0.05927 (5) | 0.12410 (15) | 0.0280 (3) | |
H3 | 1.0460 | 0.0578 | 0.1073 | 0.034* | |
C4 | 0.90549 (14) | 0.00852 (5) | 0.17415 (16) | 0.0298 (3) | |
H4 | 0.9659 | −0.0267 | 0.1916 | 0.036* | |
C5 | 0.76666 (14) | 0.01096 (5) | 0.19811 (14) | 0.0266 (2) | |
H5 | 0.7314 | −0.0229 | 0.2341 | 0.032* | |
C6 | 0.68089 (13) | 0.06259 (5) | 0.16949 (14) | 0.0234 (2) | |
H6 | 0.5847 | 0.0646 | 0.1829 | 0.028* | |
C8 | 0.51516 (13) | 0.17821 (4) | 0.09628 (13) | 0.0207 (2) | |
C9 | 0.37373 (13) | 0.14622 (4) | −0.00512 (13) | 0.0213 (2) | |
H9 | 0.3791 | 0.1146 | −0.0719 | 0.026* | |
C10 | 0.22525 (13) | 0.16003 (4) | −0.00954 (13) | 0.0209 (2) | |
H10 | 0.1301 | 0.1378 | −0.0795 | 0.025* | |
C11 | 0.21415 (13) | 0.20611 (4) | 0.08742 (13) | 0.0212 (2) | |
C12 | 0.35601 (13) | 0.23827 (5) | 0.18907 (14) | 0.0237 (2) | |
H12 | 0.3507 | 0.2698 | 0.2561 | 0.028* | |
C13 | 0.50413 (13) | 0.22456 (5) | 0.19288 (13) | 0.0225 (2) | |
H13 | 0.5992 | 0.2470 | 0.2620 | 0.027* | |
C15 | −0.00317 (13) | 0.27123 (5) | 0.08107 (13) | 0.0218 (2) | |
C17 | −0.20195 (13) | 0.32340 (5) | 0.10952 (15) | 0.0273 (3) | |
H17 | −0.2923 | 0.3238 | 0.1333 | 0.033* | |
C18 | −0.15272 (14) | 0.37602 (5) | 0.07244 (15) | 0.0271 (2) | |
H18 | −0.2051 | 0.4117 | 0.0736 | 0.032* | |
C19 | −0.02310 (14) | 0.37485 (5) | 0.03317 (14) | 0.0260 (2) | |
H19 | 0.0130 | 0.4100 | 0.0041 | 0.031* | |
C20 | 0.05239 (13) | 0.32251 (5) | 0.03668 (14) | 0.0247 (2) | |
H20 | 0.1405 | 0.3210 | 0.0096 | 0.030* | |
C21 | 0.49781 (18) | 0.09257 (6) | 0.65351 (19) | 0.0418 (3) | |
H21 | 0.5113 | 0.1219 | 0.7348 | 0.050* | |
C22 | 0.41095 (17) | 0.10534 (6) | 0.4784 (2) | 0.0407 (3) | |
H22 | 0.3659 | 0.1433 | 0.4418 | 0.049* | |
C23 | 0.39118 (14) | 0.06342 (6) | 0.36099 (16) | 0.0338 (3) | |
H23 | 0.3327 | 0.0726 | 0.2430 | 0.041* | |
C24 | 0.45620 (13) | 0.00641 (5) | 0.41152 (14) | 0.0260 (2) | |
C25 | 0.43734 (15) | −0.03839 (6) | 0.29296 (16) | 0.0347 (3) | |
H25 | 0.3784 | −0.0304 | 0.1742 | 0.042* |
U11 | U22 | U33 | U12 | U13 | U23 | |
N2 | 0.0202 (4) | 0.0227 (5) | 0.0307 (5) | −0.0003 (3) | 0.0131 (4) | −0.0019 (4) |
N7 | 0.0202 (4) | 0.0190 (4) | 0.0381 (5) | −0.0005 (3) | 0.0169 (4) | 0.0010 (4) |
N14 | 0.0216 (5) | 0.0195 (4) | 0.0415 (6) | −0.0003 (3) | 0.0184 (4) | −0.0002 (4) |
N16 | 0.0201 (4) | 0.0214 (5) | 0.0329 (5) | 0.0005 (3) | 0.0135 (4) | −0.0004 (4) |
C1 | 0.0183 (5) | 0.0210 (5) | 0.0223 (5) | −0.0006 (4) | 0.0084 (4) | −0.0027 (4) |
C3 | 0.0220 (5) | 0.0275 (6) | 0.0365 (6) | 0.0019 (4) | 0.0154 (5) | −0.0039 (5) |
C4 | 0.0278 (6) | 0.0227 (6) | 0.0369 (6) | 0.0056 (4) | 0.0135 (5) | −0.0008 (5) |
C5 | 0.0275 (6) | 0.0209 (5) | 0.0287 (6) | −0.0019 (4) | 0.0110 (5) | 0.0001 (4) |
C6 | 0.0208 (5) | 0.0238 (5) | 0.0266 (5) | −0.0013 (4) | 0.0118 (4) | −0.0010 (4) |
C8 | 0.0188 (5) | 0.0189 (5) | 0.0249 (5) | 0.0023 (4) | 0.0108 (4) | 0.0042 (4) |
C9 | 0.0236 (5) | 0.0183 (5) | 0.0236 (5) | 0.0005 (4) | 0.0123 (4) | −0.0003 (4) |
C10 | 0.0191 (5) | 0.0193 (5) | 0.0227 (5) | −0.0016 (4) | 0.0085 (4) | 0.0015 (4) |
C11 | 0.0197 (5) | 0.0192 (5) | 0.0258 (5) | 0.0024 (4) | 0.0115 (4) | 0.0034 (4) |
C12 | 0.0239 (5) | 0.0211 (5) | 0.0269 (5) | 0.0013 (4) | 0.0124 (4) | −0.0028 (4) |
C13 | 0.0192 (5) | 0.0209 (5) | 0.0247 (5) | −0.0020 (4) | 0.0081 (4) | −0.0011 (4) |
C15 | 0.0177 (5) | 0.0221 (5) | 0.0236 (5) | 0.0003 (4) | 0.0078 (4) | −0.0012 (4) |
C17 | 0.0216 (5) | 0.0258 (6) | 0.0364 (6) | 0.0022 (4) | 0.0151 (5) | −0.0016 (5) |
C18 | 0.0248 (5) | 0.0212 (5) | 0.0313 (6) | 0.0047 (4) | 0.0098 (5) | −0.0005 (4) |
C19 | 0.0250 (5) | 0.0224 (5) | 0.0255 (5) | −0.0019 (4) | 0.0077 (4) | 0.0019 (4) |
C20 | 0.0213 (5) | 0.0261 (5) | 0.0276 (5) | −0.0002 (4) | 0.0122 (4) | 0.0015 (4) |
C21 | 0.0534 (8) | 0.0369 (7) | 0.0546 (8) | −0.0155 (6) | 0.0416 (7) | −0.0104 (6) |
C22 | 0.0383 (7) | 0.0321 (6) | 0.0674 (9) | 0.0032 (5) | 0.0378 (7) | 0.0111 (6) |
C23 | 0.0219 (5) | 0.0436 (7) | 0.0356 (6) | 0.0009 (5) | 0.0132 (5) | 0.0154 (5) |
C24 | 0.0186 (5) | 0.0352 (6) | 0.0250 (6) | −0.0054 (4) | 0.0108 (4) | 0.0041 (4) |
C25 | 0.0350 (6) | 0.0458 (7) | 0.0272 (6) | −0.0154 (5) | 0.0178 (5) | −0.0032 (5) |
N2—C3 | 1.3415 (14) | C11—C12 | 1.3996 (15) |
N2—C1 | 1.3466 (14) | C12—C13 | 1.3864 (15) |
N7—C1 | 1.3732 (13) | C12—H12 | 0.9500 |
N7—C8 | 1.4129 (13) | C13—H13 | 0.9500 |
N7—H7N | 0.9001 | C15—C20 | 1.4066 (15) |
N14—C15 | 1.3711 (14) | C20—C19 | 1.3763 (16) |
N14—C11 | 1.4081 (13) | C20—H20 | 0.9500 |
N14—H14N | 0.8999 | C19—C18 | 1.3934 (16) |
N16—C17 | 1.3436 (14) | C19—H19 | 0.9500 |
N16—C15 | 1.3441 (14) | C18—C17 | 1.3778 (16) |
C1—C6 | 1.4087 (15) | C18—H18 | 0.9500 |
C3—C4 | 1.3778 (17) | C17—H17 | 0.9500 |
C3—H3 | 0.9500 | C21—C25i | 1.359 (2) |
C4—C5 | 1.3938 (16) | C21—C22 | 1.405 (2) |
C4—H4 | 0.9500 | C21—H21 | 0.9500 |
C5—C6 | 1.3756 (15) | C22—C23 | 1.363 (2) |
C5—H5 | 0.9500 | C22—H22 | 0.9500 |
C6—H6 | 0.9500 | C23—C24 | 1.4155 (18) |
C8—C9 | 1.3947 (15) | C23—H23 | 0.9500 |
C8—C13 | 1.3955 (15) | C24—C25 | 1.4188 (18) |
C9—C10 | 1.3877 (15) | C24—C24i | 1.420 (2) |
C9—H9 | 0.9500 | C25—C21i | 1.359 (2) |
C10—C11 | 1.3934 (15) | C25—H25 | 0.9500 |
C10—H10 | 0.9500 | ||
C3—N2—C1 | 117.53 (9) | C13—C12—H12 | 119.7 |
C1—N7—C8 | 125.32 (9) | C11—C12—H12 | 119.7 |
C1—N7—H7N | 114.8 | C12—C13—C8 | 120.73 (10) |
C8—N7—H7N | 118.1 | C12—C13—H13 | 119.6 |
C15—N14—C11 | 125.87 (9) | C8—C13—H13 | 119.6 |
C15—N14—H14N | 116.0 | N16—C15—N14 | 114.89 (9) |
C11—N14—H14N | 117.9 | N16—C15—C20 | 121.99 (10) |
C17—N16—C15 | 117.47 (9) | N14—C15—C20 | 123.08 (10) |
N2—C1—N7 | 114.91 (9) | C19—C20—C15 | 118.86 (10) |
N2—C1—C6 | 121.85 (9) | C19—C20—H20 | 120.6 |
N7—C1—C6 | 123.22 (9) | C15—C20—H20 | 120.6 |
N2—C3—C4 | 124.62 (10) | C20—C19—C18 | 119.67 (10) |
N2—C3—H3 | 117.7 | C20—C19—H19 | 120.2 |
C4—C3—H3 | 117.7 | C18—C19—H19 | 120.2 |
C3—C4—C5 | 117.38 (10) | C17—C18—C19 | 117.42 (10) |
C3—C4—H4 | 121.3 | C17—C18—H18 | 121.3 |
C5—C4—H4 | 121.3 | C19—C18—H18 | 121.3 |
C6—C5—C4 | 119.73 (10) | N16—C17—C18 | 124.53 (10) |
C6—C5—H5 | 120.1 | N16—C17—H17 | 117.7 |
C4—C5—H5 | 120.1 | C18—C17—H17 | 117.7 |
C5—C6—C1 | 118.88 (10) | C25i—C21—C22 | 120.32 (13) |
C5—C6—H6 | 120.6 | C25i—C21—H21 | 119.8 |
C1—C6—H6 | 120.6 | C22—C21—H21 | 119.8 |
C9—C8—C13 | 118.59 (9) | C23—C22—C21 | 120.17 (12) |
C9—C8—N7 | 121.38 (9) | C23—C22—H22 | 119.9 |
C13—C8—N7 | 119.95 (9) | C21—C22—H22 | 119.9 |
C10—C9—C8 | 120.75 (10) | C22—C23—C24 | 121.24 (12) |
C10—C9—H9 | 119.6 | C22—C23—H23 | 119.4 |
C8—C9—H9 | 119.6 | C24—C23—H23 | 119.4 |
C9—C10—C11 | 120.75 (10) | C23—C24—C25 | 122.80 (11) |
C9—C10—H10 | 119.6 | C23—C24—C24i | 118.50 (14) |
C11—C10—H10 | 119.6 | C25—C24—C24i | 118.70 (14) |
C10—C11—C12 | 118.52 (9) | C21i—C25—C24 | 121.07 (12) |
C10—C11—N14 | 119.57 (9) | C21i—C25—H25 | 119.5 |
C12—C11—N14 | 121.83 (10) | C24—C25—H25 | 119.5 |
C13—C12—C11 | 120.67 (10) | ||
C3—N2—C1—N7 | 178.10 (10) | N14—C11—C12—C13 | 176.65 (10) |
C3—N2—C1—C6 | −0.10 (15) | C11—C12—C13—C8 | −0.39 (16) |
C8—N7—C1—N2 | 173.65 (10) | C9—C8—C13—C12 | 0.44 (16) |
C8—N7—C1—C6 | −8.18 (17) | N7—C8—C13—C12 | 177.21 (10) |
C1—N2—C3—C4 | −0.51 (17) | C17—N16—C15—N14 | −179.99 (10) |
N2—C3—C4—C5 | 0.15 (18) | C17—N16—C15—C20 | −2.18 (16) |
C3—C4—C5—C6 | 0.83 (17) | C11—N14—C15—N16 | −168.34 (10) |
C4—C5—C6—C1 | −1.40 (16) | C11—N14—C15—C20 | 13.88 (17) |
N2—C1—C6—C5 | 1.05 (16) | N16—C15—C20—C19 | 2.30 (16) |
N7—C1—C6—C5 | −176.99 (10) | N14—C15—C20—C19 | 179.93 (10) |
C1—N7—C8—C9 | −51.81 (15) | C15—C20—C19—C18 | −0.34 (16) |
C1—N7—C8—C13 | 131.51 (11) | C20—C19—C18—C17 | −1.53 (16) |
C13—C8—C9—C10 | −0.20 (15) | C15—N16—C17—C18 | 0.14 (17) |
N7—C8—C9—C10 | −176.92 (9) | C19—C18—C17—N16 | 1.71 (18) |
C8—C9—C10—C11 | −0.10 (16) | C25i—C21—C22—C23 | −0.01 (19) |
C9—C10—C11—C12 | 0.16 (15) | C21—C22—C23—C24 | 0.29 (18) |
C9—C10—C11—N14 | −176.49 (9) | C22—C23—C24—C25 | 179.68 (11) |
C15—N14—C11—C10 | −138.39 (11) | C22—C23—C24—C24i | −0.23 (19) |
C15—N14—C11—C12 | 45.08 (16) | C23—C24—C25—C21i | 179.73 (11) |
C10—C11—C12—C13 | 0.08 (16) | C24i—C24—C25—C21i | −0.36 (19) |
Symmetry code: (i) −x+1, −y, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
N7—H7N···N16ii | 0.90 | 2.11 | 3.0027 (13) | 175 |
N14—H14N···N2iii | 0.90 | 2.13 | 3.0305 (13) | 174 |
Symmetry codes: (ii) x+1, y, z; (iii) x−1, y, z. |
Experimental details
Crystal data | |
Chemical formula | C10H8·2C16H14N4 |
Mr | 652.78 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 130 |
a, b, c (Å) | 9.2224 (1), 22.8371 (2), 8.8760 (1) |
β (°) | 117.936 (2) |
V (Å3) | 1651.56 (3) |
Z | 2 |
Radiation type | Cu Kα |
µ (mm−1) | 0.63 |
Crystal size (mm) | 0.20 × 0.15 × 0.05 |
Data collection | |
Diffractometer | Oxford Diffraction SuperNova |
Absorption correction | Multi-scan (CrysAlis PRO; Agilent, 2010) |
Tmin, Tmax | 0.931, 1.000 |
No. of measured, independent and observed [I > 2/s(I)] reflections | 9878, 3020, 2671 |
Rint | 0.019 |
(sin θ/λ)max (Å−1) | 0.602 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.033, 0.091, 1.05 |
No. of reflections | 3020 |
No. of parameters | 226 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.17, −0.19 |
Computer programs: CrysAlis PRO (Agilent, 2010), SIR2004 (Burla et al., 2005), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997) and Mercury (Macrae et al., 2006).
D—H···A | D—H | H···A | D···A | D—H···A |
N7—H7N···N16i | 0.90 | 2.11 | 3.0027 (13) | 175 |
N14—H14N···N2ii | 0.90 | 2.13 | 3.0305 (13) | 174 |
Symmetry codes: (i) x+1, y, z; (ii) x−1, y, z. |
References
Agilent (2010). CrysAlis PRO. Agilent Technologies, Yarnton, England. Google Scholar
Bensemann, I., Gdaniec, M. & Połoński, T. (2002). New J. Chem. 26, 448–456. Web of Science CSD CrossRef CAS Google Scholar
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Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565. CrossRef IUCr Journals Google Scholar
Gdaniec, M., Bensemann, I. & Połoński, T. (2005). CrystEngComm, 7, 433–438. Web of Science CSD CrossRef CAS Google Scholar
Macrae, C. F., Edgington, P. R., McCabe, P., Pidcock, E., Shields, G. P., Taylor, R., Towler, M. & van de Streek, J. (2006). J. Appl. Cryst. 39, 453–457. Web of Science CSD CrossRef CAS IUCr Journals Google Scholar
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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.
N,N'-Di(pyridin-2-yl)benzene-1,4-diamine (PDAB) is a very versatile supramolecular reagent (Bensemann et al., 2002; Gdaniec et al., 2005). Recently we have shown that this compound can form 2:1 cocrystals with an aromatic heterobase quinoxaline (Wicher & Gdaniec, 2011b). In these cocrystals PDAB molecules were organized into hydrogen-bonded tapes with N—H···N hydrogen bonds occurring between self-complementary 2-pyridylamine groups. The quinoxaline molecule enclosed in a centrosymmetric cage, due to disorder, simulated very well the naphthalene molecule. We have concluded that PDAB when cocrystalized with naphthalene should form isostructural crystals. Indeed, cocrystals of PDAB with naphthalene with the 2:1 component ratio were obtained, however, to our surprise, they were not isostructural with their quinoxaline analogue.
The title complex is shown in Fig. 1. The PDAB molecule is nonplanar and adopts an E,E form that promotes the formation of a cyclic R22(8) motif via N—H···N hydrogen bond between the self-complementary 2-pyridylamine units (Table 1). These cyclic motifs assemble PDAB molecules into tapes extending along [1 0 0]. The structure of the tape is very similar to that formed in the cocrystal with quinoxaline, however the arrangement of the tapes is different. In the cocrystal with quinoxaline the tapes were arranged into pairs via aromatic π···π stacking interactions, whereas in the title cocrystal they are arranged into (0 1 0) layers with a short C–H···C contact [H12···C9i 2.79 Å, <C12–H12···C9i 171°; symmetry code (i): x, 0.5 - y, 1/2 + z] occurring between the PDAB molecules. The naphthalene molecules are enclosed in cages formed between adjacent (0 1 0) layers where they also form short C—H···C contacts with PDAB (H17···C21i 2.78 Å, <C17–H17···C21i137°; H23···C10 2.81 Å, <C23–H23···C10 147°; symmetry code (i): x - 1, 0.5 - y, z - 1/2).
Looking for the reason for this structural alteration we have noticed that in the cocrystal with quinoxaline the guest molecule enclosed in a cavity forms with PDAB one short H···H contact of 2.09 Å. In the case of naphthalene there would be two such contacts, most probably repulsive in their nature, and therefore sufficiently destabilizing the crystal structure for it being rebuild.