
Acta Cryst. (2009). E65, m1544 [ doi:10.1107/S1600536809046455 ]
2N,N')lead(II)]-
-terephthalato-
2O1:O4\]The PbII atom in the polymeric title compound, [Pb(C8H4O4)(C12H6N2O2)]n, is chelated by the N-heterocycle, and adjacent atoms are bridged by rigid terephthalate dianions into a linear chain. The PbII atom is stereochemically active in a
-square-pyramidal coordination geometry in which the lone-pair electrons occupy a basal site. When three other weaker Pb
O interactions are considered, the geometry is a
-dodecahedron.
Lead nitrate (0.5 mmol, 0.166 g), terephthalic acid (0.5 mmol, 0.083 g) and phenanthrene-9,10-dione (0.5 mmol, 0.104 g) in water (12 ml) were heated at 443 K for 3 days in a Teflon-lined, stainless-steel Parr bomb. The bomb was slowly cooled to room temperature after which crystals were collected in 40% yield.
Carbon-bound H-atoms were placed in calculated positions (C-H = 0.93 Å) and were included in the refinement in the riding model approximation, with Uiso(H) set to 1.2Ueq(C). The final difference Fourier map had one peak in the vicinity of the lead atom (0.95 Å from Pb1) but was otherwise diffuse.
Data collection: APEX2 (Bruker, 2007); cell refinement: SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: publCIF (Westrip, 2009).
| [Pb(C8H4O4)(C12H6N2O2)] | F(000) = 1096 |
| Mr = 581.49 | Dx = 2.334 Mg m−3 |
| Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
| Hall symbol: -P 2ybc | Cell parameters from 2807 reflections |
| a = 10.428 (1) Å | θ = 2.4–25.4° |
| b = 15.187 (1) Å | µ = 10.24 mm−1 |
| c = 11.478 (3) Å | T = 295 K |
| β = 114.444 (1)° | Block, yellow |
| V = 1654.8 (5) Å3 | 0.24 × 0.22 × 0.20 mm |
| Z = 4 |
| Bruker APEXII area-detector diffractometer | 3233 independent reflections |
| Radiation source: fine-focus sealed tube | 2369 reflections with I > 2σ(I) |
| graphite | Rint = 0.036 |
| φ and ω scans | θmax = 26.0°, θmin = 2.2° |
| Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −12→7 |
| Tmin = 0.193, Tmax = 0.234 | k = −18→18 |
| 8875 measured reflections | l = −12→14 |
| 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) = 0.086 | H-atom parameters constrained |
| S = 1.00 | w = 1/[σ2(Fo2) + (0.0491P)2] where P = (Fo2 + 2Fc2)/3 |
| 3233 reflections | (Δ/σ)max = 0.001 |
| 262 parameters | Δρmax = 1.94 e Å−3 |
| 0 restraints | Δρmin = −0.95 e Å−3 |
| [Pb(C8H4O4)(C12H6N2O2)] | V = 1654.8 (5) Å3 |
| Mr = 581.49 | Z = 4 |
| Monoclinic, P21/c | Mo Kα radiation |
| a = 10.428 (1) Å | µ = 10.24 mm−1 |
| b = 15.187 (1) Å | T = 295 K |
| c = 11.478 (3) Å | 0.24 × 0.22 × 0.20 mm |
| β = 114.444 (1)° |
| Bruker APEXII area-detector diffractometer | 3233 independent reflections |
| Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2369 reflections with I > 2σ(I) |
| Tmin = 0.193, Tmax = 0.234 | Rint = 0.036 |
| 8875 measured reflections | θmax = 26.0° |
| R[F2 > 2σ(F2)] = 0.033 | H-atom parameters constrained |
| wR(F2) = 0.086 | Δρmax = 1.94 e Å−3 |
| S = 1.00 | Δρmin = −0.95 e Å−3 |
| 3233 reflections | Absolute structure: ? |
| 262 parameters | Flack parameter: ? |
| 0 restraints | Rogers parameter: ? |
| x | y | z | Uiso*/Ueq | ||
| Pb1 | 0.60601 (3) | 0.525108 (19) | 0.39442 (2) | 0.02978 (11) | |
| O1 | 0.8123 (7) | 0.4460 (4) | 0.5353 (5) | 0.0548 (17) | |
| O2 | 0.7155 (6) | 0.4344 (4) | 0.6715 (5) | 0.0489 (15) | |
| O3 | 1.2513 (6) | 0.1473 (4) | 1.0397 (5) | 0.0434 (14) | |
| O4 | 1.3459 (6) | 0.1510 (4) | 0.9005 (5) | 0.0414 (14) | |
| O5 | 0.7884 (6) | 0.5551 (4) | −0.1400 (5) | 0.0396 (14) | |
| O6 | 0.5419 (6) | 0.6582 (4) | −0.2269 (4) | 0.0401 (14) | |
| N1 | 0.7358 (7) | 0.4976 (4) | 0.2537 (6) | 0.0313 (15) | |
| N2 | 0.5139 (6) | 0.6109 (4) | 0.1764 (5) | 0.0273 (14) | |
| C1 | 0.8093 (8) | 0.4176 (5) | 0.6363 (6) | 0.0274 (16) | |
| C2 | 0.9298 (7) | 0.3592 (5) | 0.7180 (6) | 0.0269 (16) | |
| C3 | 0.9398 (8) | 0.3284 (5) | 0.8348 (6) | 0.0328 (18) | |
| H3 | 0.8732 | 0.3456 | 0.8647 | 0.039* | |
| C4 | 1.0481 (8) | 0.2719 (5) | 0.9082 (6) | 0.0307 (17) | |
| H4 | 1.0530 | 0.2514 | 0.9862 | 0.037* | |
| C5 | 1.1492 (8) | 0.2459 (4) | 0.8653 (6) | 0.0250 (15) | |
| C6 | 1.1423 (8) | 0.2799 (5) | 0.7518 (6) | 0.0266 (16) | |
| H6 | 1.2107 | 0.2642 | 0.7234 | 0.032* | |
| C7 | 1.0367 (8) | 0.3362 (4) | 0.6798 (6) | 0.0279 (17) | |
| H7 | 1.0359 | 0.3595 | 0.6046 | 0.033* | |
| C8 | 1.2578 (8) | 0.1772 (5) | 0.9386 (7) | 0.0274 (16) | |
| C9 | 0.8489 (9) | 0.4464 (5) | 0.2881 (7) | 0.039 (2) | |
| H9 | 0.8807 | 0.4198 | 0.3681 | 0.047* | |
| C10 | 0.9226 (8) | 0.4296 (6) | 0.2157 (7) | 0.0373 (19) | |
| H10 | 1.0007 | 0.3927 | 0.2460 | 0.045* | |
| C11 | 0.8796 (8) | 0.4678 (5) | 0.0993 (7) | 0.0353 (18) | |
| H11 | 0.9284 | 0.4576 | 0.0487 | 0.042* | |
| C12 | 0.7620 (7) | 0.5226 (5) | 0.0555 (6) | 0.0253 (15) | |
| C13 | 0.7110 (8) | 0.5659 (5) | −0.0684 (6) | 0.0291 (17) | |
| C14 | 0.5958 (8) | 0.6182 (5) | −0.1084 (6) | 0.0294 (16) | |
| C15 | 0.5252 (8) | 0.6348 (5) | −0.0279 (6) | 0.0275 (16) | |
| C16 | 0.4105 (8) | 0.6930 (5) | −0.0603 (7) | 0.0371 (19) | |
| H16 | 0.3745 | 0.7208 | −0.1397 | 0.044* | |
| C17 | 0.3523 (9) | 0.7087 (5) | 0.0235 (7) | 0.041 (2) | |
| H17 | 0.2778 | 0.7481 | 0.0027 | 0.049* | |
| C18 | 0.4045 (8) | 0.6657 (5) | 0.1401 (7) | 0.0354 (19) | |
| H18 | 0.3614 | 0.6754 | 0.1956 | 0.042* | |
| C19 | 0.5741 (7) | 0.5947 (4) | 0.0952 (6) | 0.0230 (15) | |
| C20 | 0.6907 (7) | 0.5364 (4) | 0.1342 (6) | 0.0237 (15) |
| U11 | U22 | U33 | U12 | U13 | U23 | |
| Pb1 | 0.02839 (17) | 0.03876 (18) | 0.02215 (15) | −0.00225 (15) | 0.01043 (12) | 0.00065 (13) |
| O1 | 0.044 (4) | 0.090 (5) | 0.032 (3) | 0.022 (3) | 0.018 (3) | 0.020 (3) |
| O2 | 0.045 (4) | 0.067 (4) | 0.043 (3) | 0.017 (3) | 0.026 (3) | 0.012 (3) |
| O3 | 0.054 (4) | 0.050 (3) | 0.032 (3) | 0.017 (3) | 0.024 (3) | 0.012 (3) |
| O4 | 0.039 (3) | 0.055 (4) | 0.035 (3) | 0.011 (3) | 0.020 (3) | 0.009 (3) |
| O5 | 0.037 (3) | 0.060 (4) | 0.031 (3) | 0.000 (3) | 0.025 (3) | 0.000 (3) |
| O6 | 0.040 (3) | 0.058 (4) | 0.022 (3) | 0.007 (3) | 0.012 (3) | 0.012 (2) |
| N1 | 0.031 (4) | 0.031 (3) | 0.030 (3) | 0.007 (3) | 0.012 (3) | 0.007 (2) |
| N2 | 0.029 (4) | 0.030 (3) | 0.024 (3) | 0.000 (3) | 0.013 (3) | −0.001 (2) |
| C1 | 0.030 (4) | 0.031 (4) | 0.020 (4) | −0.003 (3) | 0.010 (3) | −0.005 (3) |
| C2 | 0.023 (4) | 0.031 (4) | 0.020 (4) | 0.000 (3) | 0.002 (3) | −0.001 (3) |
| C3 | 0.032 (4) | 0.048 (5) | 0.019 (4) | 0.006 (4) | 0.011 (3) | 0.002 (3) |
| C4 | 0.035 (4) | 0.038 (4) | 0.019 (4) | 0.001 (4) | 0.011 (3) | 0.007 (3) |
| C5 | 0.030 (4) | 0.023 (4) | 0.023 (4) | −0.005 (3) | 0.012 (3) | −0.004 (3) |
| C6 | 0.028 (4) | 0.036 (4) | 0.019 (3) | 0.001 (3) | 0.013 (3) | 0.001 (3) |
| C7 | 0.032 (4) | 0.030 (4) | 0.021 (4) | 0.000 (3) | 0.011 (3) | 0.004 (3) |
| C8 | 0.028 (4) | 0.029 (4) | 0.025 (4) | −0.005 (3) | 0.012 (3) | −0.004 (3) |
| C9 | 0.042 (5) | 0.044 (5) | 0.028 (4) | 0.013 (4) | 0.010 (4) | 0.005 (3) |
| C10 | 0.031 (4) | 0.049 (5) | 0.031 (4) | 0.007 (4) | 0.012 (4) | 0.006 (4) |
| C11 | 0.035 (5) | 0.038 (4) | 0.038 (4) | 0.001 (4) | 0.020 (4) | −0.003 (4) |
| C12 | 0.024 (4) | 0.031 (4) | 0.022 (3) | 0.000 (4) | 0.011 (3) | −0.007 (3) |
| C13 | 0.030 (4) | 0.035 (4) | 0.023 (4) | −0.005 (4) | 0.012 (3) | −0.010 (3) |
| C14 | 0.031 (4) | 0.035 (4) | 0.020 (3) | −0.009 (4) | 0.009 (3) | −0.002 (3) |
| C15 | 0.023 (4) | 0.034 (4) | 0.021 (4) | −0.005 (3) | 0.005 (3) | −0.001 (3) |
| C16 | 0.034 (5) | 0.043 (5) | 0.031 (4) | 0.008 (4) | 0.010 (4) | 0.008 (4) |
| C17 | 0.041 (5) | 0.042 (5) | 0.036 (5) | 0.011 (4) | 0.014 (4) | 0.012 (4) |
| C18 | 0.033 (5) | 0.038 (4) | 0.037 (5) | 0.002 (4) | 0.016 (4) | −0.008 (3) |
| C19 | 0.024 (4) | 0.023 (3) | 0.020 (3) | −0.007 (3) | 0.007 (3) | −0.003 (3) |
| C20 | 0.020 (4) | 0.030 (4) | 0.017 (3) | −0.005 (3) | 0.002 (3) | −0.005 (3) |
| Pb1—O1 | 2.410 (6) | C5—C6 | 1.375 (9) |
| Pb1—O2 | 3.211 (5) | C5—C8 | 1.514 (10) |
| Pb1—O2i | 3.176 (6) | C6—C7 | 1.369 (9) |
| Pb1—O3ii | 2.301 (5) | C6—H6 | 0.93 |
| Pb1—O4ii | 2.910 (5) | C7—H7 | 0.93 |
| Pb1—N1 | 2.535 (6) | C9—C10 | 1.369 (11) |
| Pb1—N2 | 2.626 (6) | C9—H9 | 0.93 |
| O1—C1 | 1.249 (8) | C10—C11 | 1.352 (10) |
| O2—C1 | 1.230 (9) | C10—H10 | 0.93 |
| O3—C8 | 1.273 (8) | C11—C12 | 1.392 (10) |
| O4—C8 | 1.235 (9) | C11—H11 | 0.93 |
| O5—C13 | 1.380 (8) | C12—C20 | 1.403 (9) |
| O6—C14 | 1.379 (8) | C12—C13 | 1.453 (10) |
| N1—C9 | 1.329 (10) | C13—C14 | 1.352 (10) |
| N1—C20 | 1.384 (9) | C14—C15 | 1.423 (10) |
| N2—C18 | 1.332 (9) | C15—C16 | 1.408 (10) |
| N2—C19 | 1.345 (8) | C15—C19 | 1.425 (9) |
| C1—C2 | 1.507 (10) | C16—C17 | 1.354 (10) |
| C2—C3 | 1.382 (9) | C16—H16 | 0.93 |
| C2—C7 | 1.401 (10) | C17—C18 | 1.383 (10) |
| C3—C4 | 1.390 (10) | C17—H17 | 0.93 |
| C3—H3 | 0.93 | C18—H18 | 0.93 |
| C4—C5 | 1.392 (10) | C19—C20 | 1.419 (9) |
| C4—H4 | 0.93 | ||
| O3ii—Pb1—O1 | 84.5 (2) | C7—C6—C5 | 121.3 (7) |
| O3ii—Pb1—N1 | 84.2 (2) | C7—C6—H6 | 119.3 |
| O1—Pb1—N1 | 77.40 (19) | C5—C6—H6 | 119.3 |
| O3ii—Pb1—N2 | 81.07 (18) | C6—C7—C2 | 120.8 (6) |
| O1—Pb1—N2 | 139.46 (19) | C6—C7—H7 | 119.6 |
| N1—Pb1—N2 | 63.61 (19) | C2—C7—H7 | 119.6 |
| O3ii—Pb1—O4ii | 48.16 (16) | O4—C8—O3 | 122.4 (7) |
| O1—Pb1—O4ii | 88.69 (19) | O4—C8—C5 | 121.3 (6) |
| N1—Pb1—O4ii | 131.65 (18) | O3—C8—C5 | 116.3 (7) |
| N2—Pb1—O4ii | 108.50 (17) | N1—C9—C10 | 125.5 (7) |
| O3ii—Pb1—O2i | 113.41 (19) | N1—C9—H9 | 117.2 |
| O1—Pb1—O2i | 144.83 (17) | C10—C9—H9 | 117.2 |
| N1—Pb1—O2i | 132.01 (18) | C11—C10—C9 | 118.7 (8) |
| N2—Pb1—O2i | 75.11 (16) | C11—C10—H10 | 120.7 |
| O4ii—Pb1—O2i | 82.96 (15) | C9—C10—H10 | 120.7 |
| O3ii—Pb1—O2 | 95.96 (17) | C10—C11—C12 | 119.7 (7) |
| O1—Pb1—O2 | 43.00 (17) | C10—C11—H11 | 120.1 |
| N1—Pb1—O2 | 119.73 (17) | C12—C11—H11 | 120.1 |
| N2—Pb1—O2 | 175.42 (16) | C11—C12—C20 | 118.6 (6) |
| O4ii—Pb1—O2 | 66.98 (16) | C11—C12—C13 | 122.4 (6) |
| O2i—Pb1—O2 | 103.09 (13) | C20—C12—C13 | 119.0 (6) |
| C1—O1—Pb1 | 115.9 (5) | C14—C13—O5 | 121.6 (7) |
| C1—O2—Pb1 | 76.6 (4) | C14—C13—C12 | 120.9 (6) |
| C8—O3—Pb1iii | 108.4 (5) | O5—C13—C12 | 117.5 (6) |
| C9—N1—C20 | 116.0 (7) | C13—C14—O6 | 122.4 (7) |
| C9—N1—Pb1 | 123.3 (5) | C13—C14—C15 | 120.6 (7) |
| C20—N1—Pb1 | 120.6 (5) | O6—C14—C15 | 117.0 (7) |
| C18—N2—C19 | 118.9 (6) | C16—C15—C14 | 123.4 (7) |
| C18—N2—Pb1 | 122.4 (5) | C16—C15—C19 | 116.6 (7) |
| C19—N2—Pb1 | 118.6 (4) | C14—C15—C19 | 119.9 (7) |
| O2—C1—O1 | 124.2 (7) | C17—C16—C15 | 120.3 (7) |
| O2—C1—C2 | 119.3 (6) | C17—C16—H16 | 119.9 |
| O1—C1—C2 | 116.5 (7) | C15—C16—H16 | 119.9 |
| C3—C2—C7 | 117.9 (7) | C16—C17—C18 | 119.5 (8) |
| C3—C2—C1 | 120.8 (7) | C16—C17—H17 | 120.3 |
| C7—C2—C1 | 121.2 (6) | C18—C17—H17 | 120.3 |
| C2—C3—C4 | 120.8 (7) | N2—C18—C17 | 122.7 (7) |
| C2—C3—H3 | 119.6 | N2—C18—H18 | 118.7 |
| C4—C3—H3 | 119.6 | C17—C18—H18 | 118.7 |
| C3—C4—C5 | 120.4 (6) | N2—C19—C20 | 118.7 (6) |
| C3—C4—H4 | 119.8 | N2—C19—C15 | 122.0 (6) |
| C5—C4—H4 | 119.8 | C20—C19—C15 | 119.2 (6) |
| C6—C5—C4 | 118.5 (7) | N1—C20—C12 | 121.4 (6) |
| C6—C5—C8 | 121.3 (7) | N1—C20—C19 | 118.3 (6) |
| C4—C5—C8 | 120.1 (6) | C12—C20—C19 | 120.2 (6) |
| O3ii—Pb1—O1—C1 | 108.0 (6) | Pb1iii—O3—C8—O4 | −10.9 (9) |
| N1—Pb1—O1—C1 | −166.8 (6) | Pb1iii—O3—C8—C5 | 167.9 (5) |
| N2—Pb1—O1—C1 | 177.4 (5) | C6—C5—C8—O4 | 1.9 (11) |
| O4ii—Pb1—O1—C1 | 59.9 (6) | C4—C5—C8—O4 | 177.7 (7) |
| O2i—Pb1—O1—C1 | −15.9 (8) | C6—C5—C8—O3 | −177.0 (7) |
| O2—Pb1—O1—C1 | 3.2 (5) | C4—C5—C8—O3 | −1.2 (10) |
| O3ii—Pb1—O2—C1 | −78.4 (5) | C20—N1—C9—C10 | 0.1 (12) |
| O1—Pb1—O2—C1 | −3.0 (5) | Pb1—N1—C9—C10 | −179.9 (7) |
| N1—Pb1—O2—C1 | 8.3 (5) | N1—C9—C10—C11 | 0.4 (13) |
| O4ii—Pb1—O2—C1 | −117.8 (5) | C9—C10—C11—C12 | −0.3 (12) |
| O2i—Pb1—O2—C1 | 165.8 (5) | C10—C11—C12—C20 | −0.2 (11) |
| O3ii—Pb1—N1—C9 | 93.9 (6) | C10—C11—C12—C13 | 179.7 (7) |
| O1—Pb1—N1—C9 | 8.2 (6) | C11—C12—C13—C14 | 179.5 (7) |
| N2—Pb1—N1—C9 | 176.8 (7) | C20—C12—C13—C14 | −0.6 (11) |
| O4ii—Pb1—N1—C9 | 84.9 (6) | C11—C12—C13—O5 | −3.7 (10) |
| O2i—Pb1—N1—C9 | −149.6 (6) | C20—C12—C13—O5 | 176.2 (6) |
| O2—Pb1—N1—C9 | 0.3 (7) | O5—C13—C14—O6 | 5.3 (11) |
| O3ii—Pb1—N1—C20 | −86.2 (5) | C12—C13—C14—O6 | −178.0 (6) |
| O1—Pb1—N1—C20 | −171.9 (6) | O5—C13—C14—C15 | −174.1 (6) |
| N2—Pb1—N1—C20 | −3.3 (5) | C12—C13—C14—C15 | 2.6 (11) |
| O4ii—Pb1—N1—C20 | −95.2 (5) | C13—C14—C15—C16 | 175.8 (7) |
| O2i—Pb1—N1—C20 | 30.3 (6) | O6—C14—C15—C16 | −3.7 (11) |
| O2—Pb1—N1—C20 | −179.7 (5) | C13—C14—C15—C19 | −1.4 (11) |
| O3ii—Pb1—N2—C18 | −92.5 (6) | O6—C14—C15—C19 | 179.2 (6) |
| O1—Pb1—N2—C18 | −163.1 (5) | C14—C15—C16—C17 | −177.0 (8) |
| N1—Pb1—N2—C18 | 179.6 (6) | C19—C15—C16—C17 | 0.2 (11) |
| O4ii—Pb1—N2—C18 | −52.4 (6) | C15—C16—C17—C18 | −1.4 (13) |
| O2i—Pb1—N2—C18 | 24.8 (5) | C19—N2—C18—C17 | −1.9 (11) |
| O3ii—Pb1—N2—C19 | 91.7 (5) | Pb1—N2—C18—C17 | −177.6 (6) |
| O1—Pb1—N2—C19 | 21.1 (6) | C16—C17—C18—N2 | 2.3 (13) |
| N1—Pb1—N2—C19 | 3.8 (5) | C18—N2—C19—C20 | 180.0 (6) |
| O4ii—Pb1—N2—C19 | 131.8 (5) | Pb1—N2—C19—C20 | −4.1 (8) |
| O2i—Pb1—N2—C19 | −151.0 (5) | C18—N2—C19—C15 | 0.5 (10) |
| Pb1—O2—C1—O1 | 4.8 (7) | Pb1—N2—C19—C15 | 176.5 (5) |
| Pb1—O2—C1—C2 | −175.3 (6) | C16—C15—C19—N2 | 0.3 (10) |
| Pb1—O1—C1—O2 | −6.9 (10) | C14—C15—C19—N2 | 177.6 (6) |
| Pb1—O1—C1—C2 | 173.2 (5) | C16—C15—C19—C20 | −179.1 (6) |
| O2—C1—C2—C3 | −3.5 (11) | C14—C15—C19—C20 | −1.8 (10) |
| O1—C1—C2—C3 | 176.5 (7) | C9—N1—C20—C12 | −0.7 (10) |
| O2—C1—C2—C7 | 178.1 (7) | Pb1—N1—C20—C12 | 179.4 (5) |
| O1—C1—C2—C7 | −1.9 (10) | C9—N1—C20—C19 | −177.3 (7) |
| C7—C2—C3—C4 | −3.9 (11) | Pb1—N1—C20—C19 | 2.7 (8) |
| C1—C2—C3—C4 | 177.6 (7) | C11—C12—C20—N1 | 0.7 (10) |
| C2—C3—C4—C5 | 0.5 (11) | C13—C12—C20—N1 | −179.2 (6) |
| C3—C4—C5—C6 | 2.4 (10) | C11—C12—C20—C19 | 177.3 (6) |
| C3—C4—C5—C8 | −173.6 (7) | C13—C12—C20—C19 | −2.6 (10) |
| C4—C5—C6—C7 | −1.7 (10) | N2—C19—C20—N1 | 1.0 (9) |
| C8—C5—C6—C7 | 174.2 (6) | C15—C19—C20—N1 | −179.5 (6) |
| C5—C6—C7—C2 | −1.8 (11) | N2—C19—C20—C12 | −175.7 (6) |
| C3—C2—C7—C6 | 4.6 (11) | C15—C19—C20—C12 | 3.8 (9) |
| C1—C2—C7—C6 | −177.0 (6) |
| Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) −x+2, y+1/2, −z+3/2; (iii) −x+2, y−1/2, −z+3/2. |
| Pb1—O1 | 2.410 (6) | Pb1—O4ii | 2.910 (5) |
| Pb1—O2 | 3.211 (5) | Pb1—N1 | 2.535 (6) |
| Pb1—O2i | 3.176 (6) | Pb1—N2 | 2.626 (6) |
| Pb1—O3ii | 2.301 (5) |
| Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) −x+2, y+1/2, −z+3/2. |
The authors thank Tianjin Agricultural University and the University of Malaya for supporting this study.
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