metal-organic compounds
catena-Poly[copper(I)-bis[μ-3-(1H-imidazol-2-yl)pyridine]-copper(I)-di-μ-iodido]
aSchool of Chemistry and Environment, South China Normal University, Guangzhou 510006, People's Republic of China, and, South China Normal University, Key Laboratory of Technology in Electrochemical Energy Storage and Power Generation in Guangdong Universities, Guangzhou 510006, People's Republic of China
*Correspondence e-mail: zhanqg2001@yahoo.com.cn
The title polymeric compound, [Cu2I2(C8H7N3)2]n [C8H7N3 = 3-(1H-imidazol-2-yl)pyridine (HIPy), where HIPy comes from the in situ decarboxylation of 2-(pyridin-3-yl)-1H-imidazole-4,5-dicarboxylic acid (H3PyIDC)], was obtained under solvothermal conditions. Each CuI cation is in a distorted tetrahedral coordination environment defined by two iodide anions and two nitrogen atoms from two individual HIPy ligands. Two CuI atoms are connected by two HIPy ligands to form a dimer and these dimers are further bridged through the iodide atoms, leading to a chain structure extending parallel to [100]. Moreover, intermolecular N—H⋯I hydrogen bonds and weak π–π stacking interactions [centroid⋯centroid distances of 3.809 (4) Å, an interplanar separation of 3.345 (3) Å and a ring slippage of 1.822 Å] between pyridyl rings link the chains into a two-dimensional supramolecular network in the ac plane.
Related literature
For general background on the decarboxylation of N-heterocyclic carboxylic acid ligands, see: Chen & Tong (2007); Sun et al. (2006); Yigit et al. (2006); Zhong et al. (2010).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2004); cell APEX2; data reduction: APEX2; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEPIII (Burnett & Johnson, 1996); PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97.
Supporting information
10.1107/S1600536811033605/zl2401sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811033605/zl2401Isup2.hkl
A mixture of H3PyIDC (46.6 mg, 0.2 mmol), CuI (38.1 mg, 0.2 mmol), 8 mL EtOH/H2O (1:1, v/v), and 0.1 mL Et3N was sealed in a 15mL Teflon-lined stainless steel autoclave, heated at 443 K for 48 h, and then slowly cooled to room temperature at a rate of 273 K/h. Yellow block-shaped crystals of the title compound were isolated, washed with distilled water, and dried in air (yield: 25%). Anal. Calcd. for C8H7CuIN3: C, 28.63, H, 2.10, N, 12.52. Found: C, 28.73, H, 2.05, N, 12.48%.
All non-hydrogen atoms were assigned anisotropic displacement parameters in the
All hydrogen atoms were positioned geometrically and refined using a riding model, with C—H = 0.93 Å and N—H = 0.86 Å and with Uiso(H) = 1.2 Ueq(C, N).Data collection: APEX2 (Bruker, 2004); cell
APEX2 (Bruker, 2004); data reduction: APEX2 (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEPIII (Burnett & Johnson, 1996); PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).[Cu2I2(C8H7N3)2] | Z = 1 |
Mr = 671.22 | F(000) = 316 |
Triclinic, P1 | Dx = 2.356 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 8.141 (3) Å | Cell parameters from 1252 reflections |
b = 8.306 (3) Å | θ = 2.8–26.8° |
c = 8.816 (5) Å | µ = 5.52 mm−1 |
α = 114.683 (6)° | T = 298 K |
β = 101.989 (5)° | Block, yellow |
γ = 108.258 (4)° | 0.35 × 0.32 × 0.30 mm |
V = 473.1 (4) Å3 |
Bruker SMART APEXII CCD area-detector diffractometer | 1682 independent reflections |
Radiation source: fine-focus sealed tube | 1506 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.018 |
ϕ and ω scans | θmax = 25.2°, θmin = 2.8° |
Absorption correction: multi-scan (APEX2; Bruker, 2004) | h = −8→9 |
Tmin = 0.248, Tmax = 0.288 | k = −9→5 |
2452 measured reflections | l = −10→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)] = 0.031 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.080 | H-atom parameters constrained |
S = 1.06 | w = 1/[σ2(Fo2) + (0.0418P)2 + 0.3135P] where P = (Fo2 + 2Fc2)/3 |
1682 reflections | (Δ/σ)max = 0.001 |
118 parameters | Δρmax = 0.86 e Å−3 |
0 restraints | Δρmin = −0.69 e Å−3 |
[Cu2I2(C8H7N3)2] | γ = 108.258 (4)° |
Mr = 671.22 | V = 473.1 (4) Å3 |
Triclinic, P1 | Z = 1 |
a = 8.141 (3) Å | Mo Kα radiation |
b = 8.306 (3) Å | µ = 5.52 mm−1 |
c = 8.816 (5) Å | T = 298 K |
α = 114.683 (6)° | 0.35 × 0.32 × 0.30 mm |
β = 101.989 (5)° |
Bruker SMART APEXII CCD area-detector diffractometer | 1682 independent reflections |
Absorption correction: multi-scan (APEX2; Bruker, 2004) | 1506 reflections with I > 2σ(I) |
Tmin = 0.248, Tmax = 0.288 | Rint = 0.018 |
2452 measured reflections |
R[F2 > 2σ(F2)] = 0.031 | 0 restraints |
wR(F2) = 0.080 | H-atom parameters constrained |
S = 1.06 | Δρmax = 0.86 e Å−3 |
1682 reflections | Δρmin = −0.69 e Å−3 |
118 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 > 2sigma(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 | ||
I1 | −0.63541 (5) | 0.55664 (5) | −0.19170 (4) | 0.03979 (15) | |
Cu1 | −0.29230 (10) | 0.58503 (11) | −0.03571 (10) | 0.0494 (2) | |
N1 | −0.1172 (6) | 0.8746 (7) | 0.1128 (6) | 0.0359 (10) | |
N2 | 0.0984 (6) | 1.1683 (7) | 0.3412 (6) | 0.0410 (10) | |
H2 | 0.1990 | 1.2584 | 0.4362 | 0.049* | |
C5 | 0.2418 (7) | 0.9476 (8) | 0.4986 (7) | 0.0387 (12) | |
H5 | 0.2385 | 1.0553 | 0.5891 | 0.046* | |
C6 | 0.3354 (7) | 0.8513 (9) | 0.5428 (7) | 0.0398 (12) | |
H6 | 0.3934 | 0.8906 | 0.6634 | 0.048* | |
C7 | 0.3418 (7) | 0.6968 (8) | 0.4067 (7) | 0.0379 (12) | |
H7 | 0.4039 | 0.6317 | 0.4384 | 0.045* | |
C3 | 0.0440 (7) | 0.9714 (7) | 0.2574 (7) | 0.0329 (11) | |
C1 | −0.1648 (7) | 1.0191 (8) | 0.1087 (7) | 0.0371 (12) | |
H1 | −0.2713 | 0.9951 | 0.0220 | 0.044* | |
C2 | −0.0336 (8) | 1.2007 (8) | 0.2495 (7) | 0.0414 (13) | |
H2A | −0.0330 | 1.3221 | 0.2781 | 0.050* | |
C4 | 0.1521 (7) | 0.8819 (7) | 0.3165 (7) | 0.0324 (11) | |
C8 | 0.1698 (7) | 0.7266 (7) | 0.1884 (7) | 0.0343 (11) | |
H8 | 0.1135 | 0.6846 | 0.0668 | 0.041* | |
N3 | 0.2635 (6) | 0.6336 (6) | 0.2299 (6) | 0.0364 (10) |
U11 | U22 | U33 | U12 | U13 | U23 | |
I1 | 0.0394 (2) | 0.0415 (2) | 0.0382 (2) | 0.02226 (17) | 0.01033 (16) | 0.01990 (18) |
Cu1 | 0.0506 (4) | 0.0349 (4) | 0.0442 (4) | 0.0235 (3) | 0.0051 (3) | 0.0086 (3) |
N1 | 0.035 (2) | 0.038 (3) | 0.037 (2) | 0.020 (2) | 0.0167 (19) | 0.018 (2) |
N2 | 0.039 (2) | 0.034 (3) | 0.042 (3) | 0.015 (2) | 0.013 (2) | 0.016 (2) |
C5 | 0.036 (3) | 0.039 (3) | 0.038 (3) | 0.016 (2) | 0.018 (2) | 0.016 (3) |
C6 | 0.039 (3) | 0.051 (3) | 0.030 (3) | 0.021 (3) | 0.014 (2) | 0.020 (3) |
C7 | 0.034 (3) | 0.040 (3) | 0.045 (3) | 0.017 (2) | 0.016 (2) | 0.026 (3) |
C3 | 0.033 (3) | 0.030 (3) | 0.035 (3) | 0.016 (2) | 0.015 (2) | 0.014 (2) |
C1 | 0.039 (3) | 0.039 (3) | 0.040 (3) | 0.023 (3) | 0.017 (2) | 0.022 (3) |
C2 | 0.053 (3) | 0.036 (3) | 0.050 (3) | 0.028 (3) | 0.026 (3) | 0.025 (3) |
C4 | 0.030 (2) | 0.027 (3) | 0.037 (3) | 0.013 (2) | 0.015 (2) | 0.013 (2) |
C8 | 0.033 (3) | 0.032 (3) | 0.033 (3) | 0.018 (2) | 0.011 (2) | 0.011 (2) |
N3 | 0.033 (2) | 0.034 (2) | 0.039 (2) | 0.017 (2) | 0.0118 (19) | 0.016 (2) |
I1—Cu1 | 2.7331 (12) | C6—C7 | 1.368 (8) |
I1—Cu1i | 2.7887 (14) | C6—H6 | 0.9300 |
Cu1—N1 | 1.994 (4) | C7—N3 | 1.345 (7) |
Cu1—N3ii | 2.030 (4) | C7—H7 | 0.9300 |
Cu1—I1i | 2.7887 (14) | C3—C4 | 1.464 (7) |
N1—C3 | 1.335 (6) | C1—C2 | 1.353 (7) |
N1—C1 | 1.384 (7) | C1—H1 | 0.9300 |
N2—C3 | 1.348 (7) | C2—H2A | 0.9300 |
N2—C2 | 1.372 (7) | C4—C8 | 1.388 (7) |
N2—H2 | 0.8600 | C8—N3 | 1.342 (6) |
C5—C6 | 1.376 (8) | C8—H8 | 0.9300 |
C5—C4 | 1.392 (7) | N3—Cu1ii | 2.030 (4) |
C5—H5 | 0.9300 | ||
Cu1—I1—Cu1i | 79.47 (3) | N3—C7—H7 | 118.1 |
N1—Cu1—N3ii | 127.88 (17) | C6—C7—H7 | 118.1 |
N1—Cu1—I1 | 105.56 (12) | N1—C3—N2 | 110.0 (4) |
N3ii—Cu1—I1 | 106.58 (12) | N1—C3—C4 | 126.1 (5) |
N1—Cu1—I1i | 109.74 (13) | N2—C3—C4 | 123.8 (4) |
N3ii—Cu1—I1i | 103.36 (13) | C2—C1—N1 | 110.0 (5) |
I1—Cu1—I1i | 100.53 (3) | C2—C1—H1 | 125.0 |
C3—N1—C1 | 105.7 (4) | N1—C1—H1 | 125.0 |
C3—N1—Cu1 | 128.9 (4) | C1—C2—N2 | 105.7 (5) |
C1—N1—Cu1 | 123.9 (3) | C1—C2—H2A | 127.2 |
C3—N2—C2 | 108.5 (4) | N2—C2—H2A | 127.2 |
C3—N2—H2 | 125.7 | C8—C4—C5 | 117.6 (5) |
C2—N2—H2 | 125.7 | C8—C4—C3 | 119.7 (5) |
C6—C5—C4 | 119.1 (5) | C5—C4—C3 | 122.6 (5) |
C6—C5—H5 | 120.4 | N3—C8—C4 | 123.8 (5) |
C4—C5—H5 | 120.4 | N3—C8—H8 | 118.1 |
C7—C6—C5 | 119.0 (5) | C4—C8—H8 | 118.1 |
C7—C6—H6 | 120.5 | C8—N3—C7 | 116.6 (4) |
C5—C6—H6 | 120.5 | C8—N3—Cu1ii | 121.6 (3) |
N3—C7—C6 | 123.8 (5) | C7—N3—Cu1ii | 121.8 (4) |
Cu1i—I1—Cu1—N1 | −114.10 (13) | C3—N1—C1—C2 | −0.1 (6) |
Cu1i—I1—Cu1—N3ii | 107.49 (14) | Cu1—N1—C1—C2 | 167.1 (3) |
Cu1i—I1—Cu1—I1i | 0.0 | N1—C1—C2—N2 | 0.6 (6) |
N3ii—Cu1—N1—C3 | −78.1 (5) | C3—N2—C2—C1 | −1.0 (6) |
I1—Cu1—N1—C3 | 155.6 (4) | C6—C5—C4—C8 | −3.0 (7) |
I1i—Cu1—N1—C3 | 48.1 (4) | C6—C5—C4—C3 | 177.8 (5) |
N3ii—Cu1—N1—C1 | 117.9 (4) | N1—C3—C4—C8 | 39.7 (7) |
I1—Cu1—N1—C1 | −8.4 (4) | N2—C3—C4—C8 | −138.2 (5) |
I1i—Cu1—N1—C1 | −115.9 (4) | N1—C3—C4—C5 | −141.1 (5) |
C4—C5—C6—C7 | 1.7 (8) | N2—C3—C4—C5 | 41.0 (7) |
C5—C6—C7—N3 | 0.9 (8) | C5—C4—C8—N3 | 1.9 (7) |
C1—N1—C3—N2 | −0.6 (5) | C3—C4—C8—N3 | −178.9 (4) |
Cu1—N1—C3—N2 | −166.8 (3) | C4—C8—N3—C7 | 0.6 (7) |
C1—N1—C3—C4 | −178.7 (5) | C4—C8—N3—Cu1ii | −177.5 (4) |
Cu1—N1—C3—C4 | 15.0 (7) | C6—C7—N3—C8 | −2.1 (7) |
C2—N2—C3—N1 | 1.0 (6) | C6—C7—N3—Cu1ii | 176.0 (4) |
C2—N2—C3—C4 | 179.2 (5) |
Symmetry codes: (i) −x−1, −y+1, −z; (ii) −x, −y+1, −z. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2···I1iii | 0.86 | 2.83 | 3.588 (5) | 148 |
Symmetry code: (iii) x+1, y+1, z+1. |
Experimental details
Crystal data | |
Chemical formula | [Cu2I2(C8H7N3)2] |
Mr | 671.22 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 298 |
a, b, c (Å) | 8.141 (3), 8.306 (3), 8.816 (5) |
α, β, γ (°) | 114.683 (6), 101.989 (5), 108.258 (4) |
V (Å3) | 473.1 (4) |
Z | 1 |
Radiation type | Mo Kα |
µ (mm−1) | 5.52 |
Crystal size (mm) | 0.35 × 0.32 × 0.30 |
Data collection | |
Diffractometer | Bruker SMART APEXII CCD area-detector diffractometer |
Absorption correction | Multi-scan (APEX2; Bruker, 2004) |
Tmin, Tmax | 0.248, 0.288 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 2452, 1682, 1506 |
Rint | 0.018 |
(sin θ/λ)max (Å−1) | 0.600 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.031, 0.080, 1.06 |
No. of reflections | 1682 |
No. of parameters | 118 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.86, −0.69 |
Computer programs: APEX2 (Bruker, 2004), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEPIII (Burnett & Johnson, 1996); PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2···I1i | 0.86 | 2.83 | 3.588 (5) | 148.3 |
Symmetry code: (i) x+1, y+1, z+1. |
Acknowledgements
The author acknowledges the Young Teacher Training plan of Guangdong Universities (grant No. LYM09053, 2010, 01-2011, 12) for supporting this work.
References
Bruker (2004). APEX2. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Burnett, M. N. & Johnson, C. K. (1996). ORTEPIII. Report ORNL-6895. Oak Ridge National Laboratory, Tennessee, USA. Google Scholar
Chen, X.-M. & Tong, M.-L. (2007). Acc. Chem. Res. 40, 162–170. Web of Science CrossRef PubMed CAS 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
Sun, Y.-Q., Zhang, J. & Yang, G.-Y. (2006). Chem. Commun. pp. 1947–1949. Web of Science CrossRef Google Scholar
Yigit, M.-V., Wang, Y., Moulton, B. & MacDonald, J.-C. (2006). Cryst. Growth Des. 6, 829–832. Google Scholar
Zhong, D.-C., Lu, W.-G., Jiang, L., Feng, X.-L. & Lu, T.-B. (2010). Cryst. Growth Des. 10, 739–746. Google Scholar
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In recent years, in situ metal/ligand reactions have been widely investigated for the discovery of new organic reactions, elucidation of reaction mechanisms, as well as generation of novel coordination polymers (Chen et al., 2007). Among them, hydrothermal decarboxylation of N-heterocyclic carboxylic acid ligands has been shown to occur in the presence of metal ions (Sun et al., 2006; Yigit et al., 2006; Zhong et al., 2010). For example, Sun et al. (2006) have synthesized two lanthanide sulfate–carboxylates, [Ln(HIMC)(SO4)(H2O)] (Ln = Dy and Eu, HIMC = 4-imidazolecarboxylic acid ), by using in situ decarboxylation of 4,5-imidazoledicarboxylic acid in the presence of Cu(II) ions. However, as far as we know, no decarboxylation based on 2-(pyridin-3-yl)-1H-imidazole-4,5-dicarboxylic acid (H3PyIDC) under solvothermal reaction conditions has been documented. In this work, we report the synthesis and structure of the polymeric title complex, using H3PyIDC as one of the starting materials. Under the solvothermal reaction conditions and in the presence of CuI decarboxylation occurs and H3PyIDC is transformed into HIPy which is incorporated into the polymeric title complex.
The asymmmetric unit of the title compound contains one Cu+ cation, one I- anion and one HIPy neutral ligand. As shown in Fig. 1, the CuI cation exhibits a distorted tetrahedral coordination, made up of two iodide anions and two nitrogen atoms from two individual HIPy ligands. The Cu···I bond lengths are 2.7331 (12) and 2.7887 (14) Å.
In the crystal structure, two CuI atoms are connected through two HIPy ligands via their Nimidazole and Npyridyl atoms to form a dimer with a Cu···Cu separation of 5.3621 (21) Å; these dimers are further bridged through the µ2-I atoms, leading to a 1D chain structure extending parallel to [100] (Fig. 2). Intermolecular N2–H2···I1iii hydrogen bonds between the imidazole N-H groups and the I atoms (Table 1) [symmetry code: (iii) x+1, y+1, z+1] link the chains into a 2D supramolecular network in the ac plane (Fig. 3). The crystal structure is further stabilized by weak slipped π-π stacking interactions between neighbouring pyridyl rings (N3/C4-C8 and N3v/C4v-C8v, symmetry code: (v) 1-x, 2-y, 1-z), with centroid···centroid distances of 3.809 (4) Å, an interplanar separation of 3.345 (3) Å and a ring slippage of 1.822 Å (Fig. 3).