Acta Cryst. (2007). E63, m1920 [ doi:10.1107/S1600536807027936 ]
![[kappa]](/logos/entities/kappa_rmgif.gif)
2N,N')(pyridine-3-carboxylato-2O:O')cadmium(II)]-![[mu]](/logos/entities/mu_rmgif.gif)
-pyridine-3-carboxylato-3N:O,O']The title complex, [Cd(C6H4NO2)2(C12H8N2)]n, is a one-dimensional chain-like coordination polymer. Adjacent chains are further aggregated into a three-dimensional network through ![[pi]](/logos/entities/pi_rmgif.gif)
- (interplanar distance is 3.5806 Å) and C-H
interactions.
A mixture of CdO (0.064 g, 0.05 mmol), 1,10-phenanthroline (0.0198 g, 0.1 mmol), pyridine-2,3-dicarboxylic acid (0.0167 g, 0.1 mmol) and 5.0 ml distilled water was mixed in a Teflon-lined autoclave and heated at 393 K for 3 days. After cooled to room temperature, block-like colorless crystals of (I) were obtained and washed with distlled water. The pyridine-3-dicarboxylic acid in (I) was believed to be obtained from in situ decarboxylation of pyridine-2,3-dicarboxylic acid. The similar decomposing behaviors have been observed previously (Gerrard, et al. 2000; Chen, et al. 2003; Li, et al. 2006)
Hydrogen atoms bonded to C atoms were placed in idealized location, with C—H = 0.93 Å and Uiso(H) = 1.2Ueq(C).
Data collection: SMART (Bruker, 1997); cell refinement: SAINT (Bruker, 1997); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ORTEPIII (Burnett & Johnson, 1996) and ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: SHELXL97.
![[Figure 1]](./dn2189fig1thm.gif)
| Fig. 1. The coordination environment of Cd in (I), showing the atom-numbering scheme. Displacement ellipsoids are drawn at the 50% probability level. All H atoms have been omitted for clarify. |
| [Cd(C6H4NO2)2(C12H8N2)] | Z = 2 |
| Mr = 536.81 | F000 = 536 |
| Triclinic, P1 | Dx = 1.694 Mg m−3 |
| Hall symbol: -P 1 | Mo Kα radiation λ = 0.71073 Å |
| a = 7.9274 (5) Å | Cell parameters from 5362 reflections |
| b = 10.8456 (7) Å | θ = 2.3–29.5º |
| c = 13.3381 (9) Å | µ = 1.08 mm−1 |
| α = 77.705 (1)º | T = 293 (2) K |
| β = 84.094 (1)º | Block, colourless |
| γ = 69.984 (1)º | 0.41 × 0.26 × 0.12 mm |
| V = 1052.23 (12) Å3 |
| Bruker SMART CCD area-detector diffractometer | 4681 independent reflections |
| Radiation source: fine-focus sealed tube | 4465 reflections with I > 2σ(I) |
| Monochromator: graphite | Rint = 0.015 |
| T = 293(2) K | θmax = 27.5º |
| φ and ω scans | θmin = 2.3º |
| Absorption correction: multi-scan (SADABS; Bruker, 2000) | h = −9→10 |
| Tmin = 0.666, Tmax = 0.882 | k = −11→14 |
| 6811 measured reflections | l = −17→16 |
| 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)] = 0.023 | H-atom parameters constrained |
| wR(F2) = 0.058 | w = 1/[σ2(Fo2) + (0.0261P)2 + 0.3996P] where P = (Fo2 + 2Fc2)/3 |
| S = 1.07 | (Δ/σ)max = 0.001 |
| 4681 reflections | Δρmax = 0.54 e Å−3 |
| 298 parameters | Δρmin = −0.51 e Å−3 |
| Primary atom site location: structure-invariant direct methods | Extinction correction: none |
| [Cd(C6H4NO2)2(C12H8N2)] | γ = 69.984 (1)º |
| Mr = 536.81 | V = 1052.23 (12) Å3 |
| Triclinic, P1 | Z = 2 |
| a = 7.9274 (5) Å | Mo Kα |
| b = 10.8456 (7) Å | µ = 1.08 mm−1 |
| c = 13.3381 (9) Å | T = 293 (2) K |
| α = 77.705 (1)º | 0.41 × 0.26 × 0.12 mm |
| β = 84.094 (1)º |
| Bruker SMART CCD area-detector diffractometer | 4681 independent reflections |
| Absorption correction: multi-scan (SADABS; Bruker, 2000) | 4465 reflections with I > 2σ(I) |
| Tmin = 0.666, Tmax = 0.882 | Rint = 0.015 |
| 6811 measured reflections |
| R[F2 > 2σ(F2)] = 0.023 | 298 parameters |
| wR(F2) = 0.058 | H-atom parameters constrained |
| S = 1.07 | Δρmax = 0.54 e Å−3 |
| 4681 reflections | Δρmin = −0.51 e Å−3 |
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 | ||
| Cd1 | 0.781715 (17) | 0.224799 (13) | 0.236286 (10) | 0.03447 (5) | |
| C1 | 0.9019 (3) | 0.6148 (2) | 0.33832 (19) | 0.0525 (5) | |
| H1 | 0.9584 | 0.6033 | 0.2747 | 0.063* | |
| C2 | 0.8012 (3) | 0.5342 (2) | 0.38131 (17) | 0.0437 (5) | |
| C3 | 0.7195 (3) | 0.5516 (2) | 0.4763 (2) | 0.0545 (6) | |
| H3 | 0.6496 | 0.5000 | 0.5084 | 0.065* | |
| C4 | 0.7429 (4) | 0.6465 (2) | 0.5229 (2) | 0.0586 (6) | |
| H4 | 0.6900 | 0.6598 | 0.5870 | 0.070* | |
| C5 | 0.8461 (4) | 0.7207 (2) | 0.4721 (2) | 0.0575 (6) | |
| H5 | 0.8617 | 0.7842 | 0.5040 | 0.069* | |
| C6 | 0.7872 (3) | 0.4299 (2) | 0.3280 (2) | 0.0529 (6) | |
| C7 | 1.1925 (2) | 0.14076 (18) | 0.29063 (14) | 0.0320 (4) | |
| H7 | 1.1776 | 0.2225 | 0.2467 | 0.038* | |
| C8 | 1.3578 (2) | 0.07150 (18) | 0.33359 (13) | 0.0301 (3) | |
| C9 | 1.3781 (3) | −0.0484 (2) | 0.40090 (15) | 0.0375 (4) | |
| H9 | 1.4867 | −0.0961 | 0.4326 | 0.045* | |
| C10 | 1.2348 (3) | −0.0964 (2) | 0.42046 (16) | 0.0436 (5) | |
| H10 | 1.2457 | −0.1772 | 0.4649 | 0.052* | |
| C11 | 1.0757 (3) | −0.0219 (2) | 0.37277 (16) | 0.0405 (4) | |
| H11 | 0.9800 | −0.0548 | 0.3853 | 0.049* | |
| C12 | 1.5107 (2) | 0.12578 (19) | 0.30540 (14) | 0.0325 (4) | |
| C13 | 0.8300 (3) | −0.0623 (2) | 0.14946 (18) | 0.0495 (5) | |
| H13 | 0.8667 | −0.1050 | 0.2156 | 0.059* | |
| C14 | 0.7972 (4) | −0.1364 (2) | 0.0844 (2) | 0.0606 (6) | |
| H14 | 0.8126 | −0.2267 | 0.1069 | 0.073* | |
| C15 | 0.7424 (4) | −0.0746 (3) | −0.0124 (2) | 0.0620 (7) | |
| H15 | 0.7183 | −0.1222 | −0.0562 | 0.074* | |
| C16 | 0.7224 (3) | 0.0611 (2) | −0.04569 (17) | 0.0502 (5) | |
| C17 | 0.6681 (4) | 0.1327 (3) | −0.14689 (19) | 0.0654 (7) | |
| H17 | 0.6410 | 0.0888 | −0.1926 | 0.078* | |
| C18 | 0.6558 (4) | 0.2608 (3) | −0.17691 (19) | 0.0661 (7) | |
| H18 | 0.6224 | 0.3042 | −0.2435 | 0.079* | |
| C19 | 0.6929 (3) | 0.3319 (2) | −0.10875 (17) | 0.0504 (5) | |
| C20 | 0.6834 (4) | 0.4663 (3) | −0.13723 (19) | 0.0624 (7) | |
| H20 | 0.6527 | 0.5127 | −0.2035 | 0.075* | |
| C21 | 0.7189 (4) | 0.5282 (3) | −0.0683 (2) | 0.0657 (7) | |
| H21 | 0.7138 | 0.6171 | −0.0868 | 0.079* | |
| C22 | 0.7633 (4) | 0.4577 (2) | 0.03071 (19) | 0.0557 (6) | |
| H22 | 0.7872 | 0.5016 | 0.0775 | 0.067* | |
| C23 | 0.7411 (3) | 0.2671 (2) | −0.00733 (15) | 0.0402 (4) | |
| C24 | 0.7590 (3) | 0.1274 (2) | 0.02443 (15) | 0.0386 (4) | |
| N1 | 0.9242 (3) | 0.7081 (2) | 0.38144 (18) | 0.0617 (5) | |
| N2 | 1.0527 (2) | 0.09557 (16) | 0.30935 (12) | 0.0352 (3) | |
| N3 | 0.8111 (2) | 0.06612 (17) | 0.12083 (13) | 0.0399 (4) | |
| N4 | 0.7732 (2) | 0.33079 (17) | 0.06161 (13) | 0.0421 (4) | |
| O1 | 0.8802 (3) | 0.41230 (19) | 0.24723 (15) | 0.0697 (5) | |
| O2 | 0.6869 (3) | 0.3643 (2) | 0.36485 (19) | 0.0807 (6) | |
| O3 | 1.48444 (19) | 0.22957 (14) | 0.23695 (12) | 0.0451 (3) | |
| O4 | 1.65543 (18) | 0.06529 (15) | 0.34869 (11) | 0.0428 (3) |
| U11 | U22 | U33 | U12 | U13 | U23 | |
| Cd1 | 0.02902 (8) | 0.03845 (8) | 0.03973 (8) | −0.01887 (6) | −0.00330 (5) | −0.00146 (6) |
| C1 | 0.0635 (15) | 0.0442 (12) | 0.0508 (12) | −0.0217 (11) | 0.0034 (11) | −0.0072 (10) |
| C2 | 0.0437 (11) | 0.0358 (10) | 0.0508 (12) | −0.0111 (8) | −0.0074 (9) | −0.0068 (8) |
| C3 | 0.0559 (14) | 0.0493 (13) | 0.0618 (14) | −0.0248 (11) | 0.0070 (11) | −0.0099 (11) |
| C4 | 0.0729 (17) | 0.0507 (13) | 0.0503 (13) | −0.0173 (12) | 0.0040 (12) | −0.0136 (10) |
| C5 | 0.0745 (17) | 0.0449 (12) | 0.0598 (14) | −0.0249 (12) | −0.0057 (12) | −0.0138 (11) |
| C6 | 0.0565 (14) | 0.0403 (11) | 0.0625 (15) | −0.0108 (10) | −0.0163 (11) | −0.0123 (10) |
| C7 | 0.0301 (9) | 0.0342 (9) | 0.0356 (9) | −0.0167 (7) | −0.0027 (7) | −0.0040 (7) |
| C8 | 0.0293 (8) | 0.0353 (9) | 0.0312 (8) | −0.0168 (7) | −0.0009 (6) | −0.0075 (7) |
| C9 | 0.0331 (9) | 0.0426 (10) | 0.0382 (10) | −0.0167 (8) | −0.0077 (7) | −0.0002 (8) |
| C10 | 0.0447 (11) | 0.0433 (11) | 0.0445 (11) | −0.0241 (9) | −0.0063 (9) | 0.0063 (8) |
| C11 | 0.0372 (10) | 0.0461 (11) | 0.0456 (10) | −0.0274 (8) | −0.0018 (8) | −0.0013 (8) |
| C12 | 0.0278 (9) | 0.0387 (9) | 0.0367 (9) | −0.0169 (7) | 0.0009 (7) | −0.0101 (7) |
| C13 | 0.0540 (13) | 0.0434 (11) | 0.0502 (12) | −0.0182 (10) | 0.0008 (10) | −0.0041 (9) |
| C14 | 0.0740 (18) | 0.0438 (13) | 0.0674 (16) | −0.0235 (12) | 0.0069 (13) | −0.0150 (11) |
| C15 | 0.0754 (18) | 0.0584 (15) | 0.0611 (15) | −0.0255 (13) | 0.0054 (13) | −0.0279 (12) |
| C16 | 0.0516 (13) | 0.0528 (13) | 0.0458 (12) | −0.0133 (10) | 0.0012 (10) | −0.0162 (10) |
| C17 | 0.0823 (19) | 0.0722 (17) | 0.0438 (13) | −0.0195 (14) | −0.0072 (12) | −0.0231 (12) |
| C18 | 0.0807 (19) | 0.0696 (17) | 0.0377 (12) | −0.0101 (14) | −0.0088 (12) | −0.0091 (11) |
| C19 | 0.0505 (13) | 0.0528 (13) | 0.0382 (11) | −0.0085 (10) | 0.0008 (9) | −0.0031 (9) |
| C20 | 0.0718 (17) | 0.0540 (14) | 0.0444 (13) | −0.0104 (12) | −0.0014 (11) | 0.0088 (11) |
| C21 | 0.084 (2) | 0.0484 (14) | 0.0593 (15) | −0.0265 (13) | −0.0030 (14) | 0.0088 (11) |
| C22 | 0.0693 (16) | 0.0461 (12) | 0.0543 (13) | −0.0284 (11) | −0.0051 (11) | 0.0021 (10) |
| C23 | 0.0346 (10) | 0.0445 (11) | 0.0379 (10) | −0.0116 (8) | 0.0028 (8) | −0.0042 (8) |
| C24 | 0.0331 (10) | 0.0432 (10) | 0.0381 (10) | −0.0110 (8) | 0.0036 (7) | −0.0096 (8) |
| N1 | 0.0790 (15) | 0.0489 (11) | 0.0667 (13) | −0.0343 (11) | 0.0047 (11) | −0.0123 (10) |
| N2 | 0.0296 (8) | 0.0399 (8) | 0.0410 (8) | −0.0190 (6) | −0.0035 (6) | −0.0045 (7) |
| N3 | 0.0392 (9) | 0.0405 (9) | 0.0397 (9) | −0.0149 (7) | −0.0012 (7) | −0.0045 (7) |
| N4 | 0.0452 (10) | 0.0415 (9) | 0.0411 (9) | −0.0204 (7) | −0.0015 (7) | −0.0007 (7) |
| O1 | 0.0977 (15) | 0.0558 (11) | 0.0590 (11) | −0.0246 (10) | −0.0054 (10) | −0.0177 (9) |
| O2 | 0.0774 (14) | 0.0730 (13) | 0.1171 (18) | −0.0472 (11) | 0.0106 (12) | −0.0407 (12) |
| O3 | 0.0340 (7) | 0.0420 (8) | 0.0600 (9) | −0.0213 (6) | −0.0038 (6) | 0.0048 (7) |
| O4 | 0.0297 (7) | 0.0552 (9) | 0.0463 (8) | −0.0215 (6) | −0.0070 (6) | −0.0004 (6) |
| Cd1—N2 | 2.3059 (16) | C11—H11 | 0.9300 |
| Cd1—O3i | 2.3385 (14) | C12—O4 | 1.241 (2) |
| Cd1—N4 | 2.3649 (17) | C12—O3 | 1.259 (2) |
| Cd1—O2 | 2.420 (2) | C12—Cd1ii | 2.7149 (18) |
| Cd1—O1 | 2.450 (2) | C13—N3 | 1.323 (3) |
| Cd1—O4i | 2.4526 (14) | C13—C14 | 1.398 (3) |
| Cd1—N3 | 2.4836 (17) | C13—H13 | 0.9300 |
| Cd1—C12i | 2.7149 (18) | C14—C15 | 1.360 (4) |
| C1—N1 | 1.333 (3) | C14—H14 | 0.9300 |
| C1—C2 | 1.379 (3) | C15—C16 | 1.402 (4) |
| C1—H1 | 0.9300 | C15—H15 | 0.9300 |
| C2—C3 | 1.382 (3) | C16—C24 | 1.401 (3) |
| C2—C6 | 1.497 (3) | C16—C17 | 1.433 (3) |
| C3—C4 | 1.381 (4) | C17—C18 | 1.334 (4) |
| C3—H3 | 0.9300 | C17—H17 | 0.9300 |
| C4—C5 | 1.371 (4) | C18—C19 | 1.420 (4) |
| C4—H4 | 0.9300 | C18—H18 | 0.9300 |
| C5—N1 | 1.313 (3) | C19—C20 | 1.404 (4) |
| C5—H5 | 0.9300 | C19—C23 | 1.410 (3) |
| C6—O2 | 1.240 (3) | C20—C21 | 1.350 (4) |
| C6—O1 | 1.252 (3) | C20—H20 | 0.9300 |
| C7—N2 | 1.339 (2) | C21—C22 | 1.390 (3) |
| C7—C8 | 1.381 (2) | C21—H21 | 0.9300 |
| C7—H7 | 0.9300 | C22—N4 | 1.327 (3) |
| C8—C9 | 1.383 (3) | C22—H22 | 0.9300 |
| C8—C12 | 1.502 (2) | C23—N4 | 1.351 (3) |
| C9—C10 | 1.384 (3) | C23—C24 | 1.444 (3) |
| C9—H9 | 0.9300 | C24—N3 | 1.350 (3) |
| C10—C11 | 1.377 (3) | O3—Cd1ii | 2.3385 (14) |
| C10—H10 | 0.9300 | O4—Cd1ii | 2.4526 (14) |
| C11—N2 | 1.336 (3) | ||
| N2—Cd1—O3i | 140.89 (5) | N2—C11—H11 | 118.5 |
| N2—Cd1—N4 | 120.13 (6) | C10—C11—H11 | 118.5 |
| O3i—Cd1—N4 | 91.96 (6) | O4—C12—O3 | 123.82 (17) |
| N2—Cd1—O2 | 94.99 (7) | O4—C12—C8 | 118.82 (17) |
| O3i—Cd1—O2 | 87.60 (6) | O3—C12—C8 | 117.34 (16) |
| N4—Cd1—O2 | 118.14 (7) | O4—C12—Cd1ii | 64.55 (10) |
| N2—Cd1—O1 | 84.12 (6) | O3—C12—Cd1ii | 59.33 (9) |
| O3i—Cd1—O1 | 126.26 (6) | C8—C12—Cd1ii | 174.77 (13) |
| N4—Cd1—O1 | 79.62 (6) | N3—C13—C14 | 122.7 (2) |
| O2—Cd1—O1 | 53.38 (7) | N3—C13—H13 | 118.6 |
| N2—Cd1—O4i | 86.27 (5) | C14—C13—H13 | 118.6 |
| O3i—Cd1—O4i | 54.76 (5) | C15—C14—C13 | 119.1 (2) |
| N4—Cd1—O4i | 138.04 (5) | C15—C14—H14 | 120.5 |
| O2—Cd1—O4i | 88.14 (6) | C13—C14—H14 | 120.5 |
| O1—Cd1—O4i | 139.06 (6) | C14—C15—C16 | 119.8 (2) |
| N2—Cd1—N3 | 91.80 (6) | C14—C15—H15 | 120.1 |
| O3i—Cd1—N3 | 79.14 (6) | C16—C15—H15 | 120.1 |
| N4—Cd1—N3 | 68.45 (6) | C24—C16—C15 | 117.3 (2) |
| O2—Cd1—N3 | 165.57 (6) | C24—C16—C17 | 119.6 (2) |
| O1—Cd1—N3 | 140.29 (6) | C15—C16—C17 | 123.1 (2) |
| O4i—Cd1—N3 | 79.60 (5) | C18—C17—C16 | 121.4 (2) |
| N2—Cd1—C12i | 113.35 (6) | C18—C17—H17 | 119.3 |
| O3i—Cd1—C12i | 27.59 (5) | C16—C17—H17 | 119.3 |
| N4—Cd1—C12i | 115.76 (6) | C17—C18—C19 | 121.0 (2) |
| O2—Cd1—C12i | 88.34 (6) | C17—C18—H18 | 119.5 |
| O1—Cd1—C12i | 140.09 (6) | C19—C18—H18 | 119.5 |
| O4i—Cd1—C12i | 27.19 (5) | C20—C19—C23 | 117.3 (2) |
| N3—Cd1—C12i | 77.27 (5) | C20—C19—C18 | 123.0 (2) |
| N1—C1—C2 | 124.7 (2) | C23—C19—C18 | 119.7 (2) |
| N1—C1—H1 | 117.7 | C21—C20—C19 | 119.9 (2) |
| C2—C1—H1 | 117.7 | C21—C20—H20 | 120.0 |
| C1—C2—C3 | 117.0 (2) | C19—C20—H20 | 120.0 |
| C1—C2—C6 | 120.8 (2) | C20—C21—C22 | 119.2 (2) |
| C3—C2—C6 | 122.1 (2) | C20—C21—H21 | 120.4 |
| C4—C3—C2 | 119.2 (2) | C22—C21—H21 | 120.4 |
| C4—C3—H3 | 120.4 | N4—C22—C21 | 123.2 (2) |
| C2—C3—H3 | 120.4 | N4—C22—H22 | 118.4 |
| C5—C4—C3 | 118.2 (2) | C21—C22—H22 | 118.4 |
| C5—C4—H4 | 120.9 | N4—C23—C19 | 122.3 (2) |
| C3—C4—H4 | 120.9 | N4—C23—C24 | 118.41 (18) |
| N1—C5—C4 | 124.3 (2) | C19—C23—C24 | 119.3 (2) |
| N1—C5—H5 | 117.8 | N3—C24—C16 | 122.73 (19) |
| C4—C5—H5 | 117.8 | N3—C24—C23 | 118.36 (18) |
| O2—C6—O1 | 122.7 (2) | C16—C24—C23 | 118.91 (19) |
| O2—C6—C2 | 119.7 (2) | C5—N1—C1 | 116.5 (2) |
| O1—C6—C2 | 117.6 (2) | C11—N2—C7 | 117.95 (16) |
| N2—C7—C8 | 123.01 (17) | C11—N2—Cd1 | 122.72 (12) |
| N2—C7—H7 | 118.5 | C7—N2—Cd1 | 119.30 (12) |
| C8—C7—H7 | 118.5 | C13—N3—C24 | 118.38 (19) |
| C7—C8—C9 | 118.31 (16) | C13—N3—Cd1 | 126.33 (15) |
| C7—C8—C12 | 119.94 (16) | C24—N3—Cd1 | 113.25 (13) |
| C9—C8—C12 | 121.74 (16) | C22—N4—C23 | 118.06 (19) |
| C8—C9—C10 | 119.18 (18) | C22—N4—Cd1 | 123.29 (16) |
| C8—C9—H9 | 120.4 | C23—N4—Cd1 | 117.31 (13) |
| C10—C9—H9 | 120.4 | C6—O1—Cd1 | 91.02 (16) |
| C11—C10—C9 | 118.61 (18) | C6—O2—Cd1 | 92.73 (17) |
| C11—C10—H10 | 120.7 | C12—O3—Cd1ii | 93.08 (11) |
| C9—C10—H10 | 120.7 | C12—O4—Cd1ii | 88.26 (11) |
| N2—C11—C10 | 122.92 (17) |
| Symmetry codes: (i) x−1, y, z; (ii) x+1, y, z. |
| D—H···A | D—H | H···A | D···A | D—H···A |
| C5—H5···Cg1iii | 0.93 | 2.97 | 3.853 (2) | 158 |
| C17—H17···Cg1iv | 0.93 | 2.67 | 3.435 (2) | 140 |
| Symmetry codes: (iii) −x+2, −y+1, −z+1; (iv) −x+2, −y, −z. |
| D—H···A | D—H | H···A | D···A | D—H···A |
| C5—H5···Cg1i | 0.93 | 2.97 | 3.853 (2) | 158 |
| C17—H17···Cg1ii | 0.93 | 2.67 | 3.435 (2) | 140 |
| Symmetry codes: (i) −x+2, −y+1, −z+1; (ii) −x+2, −y, −z. |
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Metal-organic coordination polymers have attracted considerable attention due to their intriguing potential applications, such as catalysis, magnetism, electronic and chemical separation (Leininger et al., 2000; Swiegers et al., 2000). Polydentate organic ligands are an important kind of ligands to construct coordination polymers. Many these hybrid materials have been synthesized and characterized by rational selection of suitable ligands. Among the various ligands, multidentate N– or O-donor ligands, such as pyridine- or imidazole-(di)carboxylic acids, have drawn extensive attention in the construction of coordination polymer. Pyridine-2,3-dicarboxylic acid is ralely used a linkage ligand (Gutschke et al., 1995; Yu et al., 2004). We present here the title new coordination polymer, (I), in which pyridine-2,3-dicarboxylic acid decarboxylates one carboxylic group and transforms to pyridine-3-carboxylic acid.
Compound (I) is a one-dimensional (one-dimensional) chain-like coordination polymer. The CdII ion of (I) is seven-coordinated by two N atoms from 1,10-phenanthroline, one N atoms and four O atoms from three different pyridine-3-dicarboxylates (Fig. 1). There are two types of pyridine-3-dicarboxylates, one chelating CdII with carboxylates, and the other acting as a bridge ligand with N atoms and carboxylates. The latter ligand link CdII ions to form a one-dimensional chain along a axis. Two adjacent chains are linked together via π-π interactions between the N3,C13,C14,C15,C16,C24 and N4,C22, C21,C20,C19,C23 rings of the 1,10-phenanthroline ligands with plane-to-plane distances of 3.542 and 3.565 Å and a slippage of 1.143 Å and 0.955 Å respectively. The dimeric chains further extend to three-dimensional (three-dimensional) supramolecular structure via π-π interactions between pyridine rings with a distance of 3.555 Å and a slippage of 0.427 Å. The whole packing is further stabilized by weak C—H···π interactions (Table 1).