metal-organic compounds
catena-Poly[[lead(II)-μ-N′-[1-(pyridin-2-yl-κN)ethylidene]isonicotinohydrazidato-κ3N′,O:N1] perchlorate]
aDepartment of Chemistry, Faculty of Science, Tabriz Branch, Islamic Azad University, PO Box 1655, Tabriz, Iran, bDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia, and cDepartment of Inorganic Chemistry, Faculty of Chemistry, University of Tabriz, PO Box 5166616471, Tabriz, Iran
*Correspondence e-mail: edward.tiekink@gmail.com
The PbII atom in the polymeric title compound, {[Pb(C13H11N4O)]ClO4}n, is coordinated by the N′-[1-(pyridin-2-yl-κN)ethylidene]isonicotinohydrazidate ligand via its O,N,N′-donors and simultaneously bridged by a neighbouring ligand via the pyridin-2-yl N atom. The resultant supramolecular chain is a zigzag along the a axis. The stereochemistry of the PbII atom is defined by an N3OE donor set (E = lone pair of electrons), which results in a Ψ-trigonal–bipyramidal coordination with the O and pyridin-2-yl N atoms in axial positions. The dihedral angle between the pyridine rings of the ligand is 6.3 (3)°. The supramolecular cationic chains are linked into a three-dimensional array via secondary Pb⋯O [3.133 (6) and 3.28 (7) Å] and Pb⋯N [3.028 (4) Å] interactions. Weak C—H⋯O interactions and aromatic π–π stacking [centroid–centroid separation = 3.693 (2) Å] also occur in the crystal.
Related literature
For the structures of metal complexes containing the N′-[1-(2-pyridyl)ethylidene]isonicotinohydrazide ligand, see: Maurya et al. (2002); Abboud et al. (2007); Zhang & Liu (2009); Hao et al. (2010). For specialized crystallization techniques, see: Harrowfield et al. (1996).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2007); cell SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
https://doi.org/10.1107/S1600536811046691/hb6465sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811046691/hb6465Isup2.hkl
A solution of methyl 2-pyridyl ketone (10 mmol) in MeOH (25 ml) was added drop wise to a solution of 4-pyridinecarboxylic acid hydrazide (10 mmol) in MeOH (15 ml). The mixture was refluxed for 6 h. The white precipitate was removed by filtration and recrystallized from MeOH solution. Then the ligand (1 mmol) was placed in one arm of a branched tube (Harrowfield et al., 1996) and a mixture of lead(II) acetate (1 mmol) and sodium perchlorate (1 mmol) in the other. Methanol was then added to fill both arms, the tube sealed and the ligand-containing arm immersed in a bath at 333 K, while the other was left at ambient temperature. After 1 week, yellow needles of (I) had deposited in the arm held at ambient temperature. They were then filtered off, washed with acetone and ether, and air dried. Yield: 75%. M.pt.: 506 K
Carbon-bound H-atoms were placed in calculated positions [C—H 0.93–0.96 Å, Uiso(H) = 1.2–1.5Ueq(parent atom)] and were included in the
in the riding model approximation.Structural studies of coordination complexes containing the N'-[1-(2-pyridyl)ethylidene]isonicotinohydrazide ligand are rare (Maurya et al., 2002; Abboud et al., 2007; Zhang & Liu, 2009; Hao et al., 2010). In each of these, the ligand coordinates in a tridentate mode with the terminal 4-pyridyl-N atom being non-coordinating. In the title lead(II) complex, (I), all four donor atoms participate in coordination of the Pb atom.
The
of (I), Fig. 1, comprises a Pb atom, a N'-[1-(2-pyridyl)ethylidene]isonicotinohydrazide anion and a perchlorate anion. The N'-[1-(2-pyridyl)ethylidene]isonicotinohydrazide ligand coordinates a lead atom in a tridentate mode, via the N1, N2 and O1 atoms, and simultaneously bridges a symmetry related lead atom via the 4-pyridyl-N4 atom, Table 1.The resultant N3O donor set plus the lone pair of electrons is based on a trigonal bipyramid with the O1 and N1 atoms in axial positions [O1—Pb—N1 = 126.27 (12)°] and the remaining N atoms [N2—Pb—N4i = 90.17 (13)°] and lone pair in equatorial positions;
i: -1/2 + x, 1.5 - y, -1/2 + z. The µ2-bridging mode of the tetradentate N'-[1-(2-pyridyl)ethylidene]isonicotinohydrazide ligand leads to a zigzag chain along the a axis, Fig. 2. The considerable distortions from the ideal geometry arise from the acute chelate angles (O1—Pb—N2 = 64.75 (12)° and N1—Pb—N2 = 63.45 (12)°) as well as the close approach of other donor atoms. Most notable amongst the latter are Pb···O(perchlorate) interactions with the two shortest contacts being Pb···O4ii of 3.133 (6) Å and Pb···O5iii = 3.287 (7) Å for i: -1 + x, y, z and ii: 1 - x, 1 - y, 2 - z. These interactions along with Pb···N3iii contacts of 3.028 (4) Å [iii: 1 - x, 1 - y, 2 - z] generate a three-dimensional architecture, Fig. 3.For the structures of metal complexes containing the N'-[1-(2-pyridyl)ethylidene]isonicotinohydrazide ligand, see: Maurya et al. (2002); Abboud et al. (2007); Zhang & Liu (2009); Hao et al. (2010). For specialized crystallization techniques, see: Harrowfield et al. (1996).
Data collection: SMART (Bruker, 2007); cell
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: ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).[Pb(C13H11N4O)]ClO4 | F(000) = 1024 |
Mr = 545.90 | Dx = 2.268 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 4195 reflections |
a = 10.0620 (6) Å | θ = 2.3–25.0° |
b = 14.4431 (8) Å | µ = 10.75 mm−1 |
c = 11.1456 (7) Å | T = 293 K |
β = 99.174 (1)° | Needle, yellow |
V = 1599.03 (16) Å3 | 0.29 × 0.11 × 0.10 mm |
Z = 4 |
Bruker SMART CCD diffractometer | 2811 independent reflections |
Radiation source: fine-focus sealed tube | 2392 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.026 |
φ and ω scans | θmax = 25.0°, θmin = 2.3° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −11→11 |
Tmin = 0.691, Tmax = 1.000 | k = −11→17 |
8396 measured reflections | l = −13→13 |
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)] = 0.022 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.056 | H-atom parameters constrained |
S = 1.07 | w = 1/[σ2(Fo2) + (0.0241P)2 + 1.6546P] where P = (Fo2 + 2Fc2)/3 |
2811 reflections | (Δ/σ)max = 0.001 |
218 parameters | Δρmax = 0.55 e Å−3 |
0 restraints | Δρmin = −0.45 e Å−3 |
[Pb(C13H11N4O)]ClO4 | V = 1599.03 (16) Å3 |
Mr = 545.90 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 10.0620 (6) Å | µ = 10.75 mm−1 |
b = 14.4431 (8) Å | T = 293 K |
c = 11.1456 (7) Å | 0.29 × 0.11 × 0.10 mm |
β = 99.174 (1)° |
Bruker SMART CCD diffractometer | 2811 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2392 reflections with I > 2σ(I) |
Tmin = 0.691, Tmax = 1.000 | Rint = 0.026 |
8396 measured reflections |
R[F2 > 2σ(F2)] = 0.022 | 0 restraints |
wR(F2) = 0.056 | H-atom parameters constrained |
S = 1.07 | Δρmax = 0.55 e Å−3 |
2811 reflections | Δρmin = −0.45 e Å−3 |
218 parameters |
Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'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 > 2σ(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 | ||
Pb | 0.260829 (17) | 0.509355 (12) | 0.899845 (16) | 0.03242 (8) | |
O1 | 0.3478 (3) | 0.6440 (2) | 1.0129 (3) | 0.0444 (9) | |
N1 | 0.3495 (4) | 0.4394 (3) | 0.7130 (4) | 0.0376 (10) | |
N2 | 0.4858 (4) | 0.5592 (3) | 0.8673 (3) | 0.0308 (9) | |
N3 | 0.5527 (4) | 0.6241 (3) | 0.9458 (4) | 0.0350 (10) | |
N4 | 0.6569 (4) | 0.8756 (3) | 1.2492 (4) | 0.0388 (10) | |
C1 | 0.4775 (5) | 0.4584 (3) | 0.7001 (4) | 0.0341 (11) | |
C2 | 0.5405 (6) | 0.4140 (4) | 0.6142 (5) | 0.0435 (13) | |
H2 | 0.6291 | 0.4280 | 0.6070 | 0.052* | |
C3 | 0.4696 (7) | 0.3487 (4) | 0.5400 (5) | 0.0528 (15) | |
H3 | 0.5103 | 0.3183 | 0.4818 | 0.063* | |
C4 | 0.3396 (6) | 0.3285 (4) | 0.5516 (5) | 0.0511 (15) | |
H4 | 0.2907 | 0.2843 | 0.5021 | 0.061* | |
C5 | 0.2827 (6) | 0.3754 (4) | 0.6388 (5) | 0.0465 (13) | |
H5 | 0.1940 | 0.3621 | 0.6466 | 0.056* | |
C6 | 0.5476 (5) | 0.5291 (3) | 0.7823 (4) | 0.0303 (10) | |
C7 | 0.6833 (5) | 0.5647 (4) | 0.7653 (5) | 0.0457 (13) | |
H7A | 0.6929 | 0.6278 | 0.7926 | 0.068* | |
H7B | 0.6918 | 0.5617 | 0.6808 | 0.068* | |
H7C | 0.7521 | 0.5275 | 0.8117 | 0.068* | |
C8 | 0.4712 (5) | 0.6637 (3) | 1.0126 (4) | 0.0310 (11) | |
C9 | 0.5353 (5) | 0.7392 (3) | 1.0933 (4) | 0.0328 (11) | |
C10 | 0.4698 (5) | 0.7752 (3) | 1.1837 (5) | 0.0367 (11) | |
H10 | 0.3848 | 0.7541 | 1.1932 | 0.044* | |
C11 | 0.5342 (5) | 0.8432 (3) | 1.2592 (5) | 0.0389 (12) | |
H11 | 0.4903 | 0.8675 | 1.3196 | 0.047* | |
C12 | 0.7181 (6) | 0.8406 (4) | 1.1623 (6) | 0.0511 (15) | |
H12 | 0.8036 | 0.8621 | 1.1550 | 0.061* | |
C13 | 0.6599 (5) | 0.7735 (4) | 1.0819 (5) | 0.0492 (14) | |
H13 | 0.7048 | 0.7518 | 1.0207 | 0.059* | |
Cl1 | 0.95237 (15) | 0.36424 (10) | 0.81424 (16) | 0.0580 (4) | |
O2 | 0.8284 (6) | 0.3288 (5) | 0.7644 (6) | 0.123 (2) | |
O3 | 1.0468 (7) | 0.2953 (5) | 0.8172 (8) | 0.166 (4) | |
O4 | 0.9936 (6) | 0.4365 (4) | 0.7458 (5) | 0.1034 (19) | |
O5 | 0.9435 (7) | 0.3990 (5) | 0.9303 (6) | 0.136 (3) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Pb | 0.02641 (11) | 0.03361 (12) | 0.03622 (12) | −0.00167 (8) | 0.00186 (8) | 0.00472 (8) |
O1 | 0.024 (2) | 0.051 (2) | 0.058 (2) | −0.0028 (16) | 0.0077 (17) | −0.0170 (18) |
N1 | 0.038 (2) | 0.035 (2) | 0.039 (2) | −0.0048 (18) | 0.0035 (19) | −0.0047 (18) |
N2 | 0.026 (2) | 0.028 (2) | 0.037 (2) | 0.0003 (16) | −0.0002 (18) | −0.0026 (17) |
N3 | 0.032 (2) | 0.031 (2) | 0.040 (2) | −0.0021 (17) | 0.0030 (19) | −0.0055 (18) |
N4 | 0.033 (2) | 0.034 (2) | 0.048 (3) | −0.0015 (18) | 0.002 (2) | −0.0085 (19) |
C1 | 0.042 (3) | 0.026 (2) | 0.033 (3) | 0.000 (2) | 0.004 (2) | 0.003 (2) |
C2 | 0.050 (3) | 0.039 (3) | 0.044 (3) | −0.005 (2) | 0.016 (3) | −0.008 (2) |
C3 | 0.071 (4) | 0.043 (3) | 0.047 (3) | −0.005 (3) | 0.018 (3) | −0.011 (3) |
C4 | 0.069 (4) | 0.043 (3) | 0.038 (3) | −0.017 (3) | 0.001 (3) | −0.013 (3) |
C5 | 0.038 (3) | 0.044 (3) | 0.055 (3) | −0.012 (2) | 0.000 (3) | −0.006 (3) |
C6 | 0.029 (3) | 0.029 (2) | 0.033 (3) | 0.001 (2) | 0.003 (2) | 0.002 (2) |
C7 | 0.041 (3) | 0.052 (3) | 0.046 (3) | −0.010 (3) | 0.015 (3) | −0.008 (3) |
C8 | 0.030 (3) | 0.028 (2) | 0.033 (3) | 0.0022 (19) | −0.002 (2) | 0.0010 (19) |
C9 | 0.033 (3) | 0.029 (3) | 0.034 (3) | 0.000 (2) | −0.001 (2) | −0.004 (2) |
C10 | 0.030 (3) | 0.037 (3) | 0.043 (3) | 0.000 (2) | 0.005 (2) | −0.004 (2) |
C11 | 0.037 (3) | 0.040 (3) | 0.040 (3) | 0.001 (2) | 0.008 (2) | −0.007 (2) |
C12 | 0.036 (3) | 0.051 (3) | 0.070 (4) | −0.011 (3) | 0.018 (3) | −0.023 (3) |
C13 | 0.040 (3) | 0.052 (3) | 0.059 (4) | −0.011 (3) | 0.019 (3) | −0.020 (3) |
Cl1 | 0.0411 (8) | 0.0515 (9) | 0.0836 (12) | −0.0050 (7) | 0.0165 (8) | 0.0117 (8) |
O2 | 0.070 (4) | 0.162 (6) | 0.140 (5) | −0.055 (4) | 0.026 (4) | −0.042 (5) |
O3 | 0.128 (6) | 0.143 (6) | 0.246 (9) | 0.083 (5) | 0.084 (6) | 0.103 (6) |
O4 | 0.114 (5) | 0.073 (3) | 0.132 (5) | −0.007 (3) | 0.046 (4) | 0.040 (3) |
O5 | 0.134 (6) | 0.191 (7) | 0.090 (4) | −0.061 (5) | 0.035 (4) | −0.037 (5) |
Pb—O1 | 2.405 (3) | C4—H4 | 0.9300 |
Pb—N1 | 2.597 (4) | C5—H5 | 0.9300 |
Pb—N2 | 2.456 (4) | C6—C7 | 1.499 (6) |
Pb—N4i | 2.472 (4) | C7—H7A | 0.9600 |
O1—C8 | 1.274 (5) | C7—H7B | 0.9600 |
N1—C1 | 1.347 (6) | C7—H7C | 0.9600 |
N1—C5 | 1.347 (6) | C8—C9 | 1.494 (6) |
N2—C6 | 1.289 (6) | C9—C13 | 1.372 (7) |
N2—N3 | 1.383 (5) | C9—C10 | 1.389 (7) |
N3—C8 | 1.322 (6) | C10—C11 | 1.385 (7) |
N4—C12 | 1.329 (6) | C10—H10 | 0.9300 |
N4—C11 | 1.341 (6) | C11—H11 | 0.9300 |
N4—Pbii | 2.472 (4) | C12—C13 | 1.385 (7) |
C1—C2 | 1.387 (7) | C12—H12 | 0.9300 |
C1—C6 | 1.475 (7) | C13—H13 | 0.9300 |
C2—C3 | 1.376 (7) | Cl1—O3 | 1.372 (6) |
C2—H2 | 0.9300 | Cl1—O2 | 1.380 (5) |
C3—C4 | 1.367 (8) | Cl1—O4 | 1.394 (5) |
C3—H3 | 0.9300 | Cl1—O5 | 1.404 (6) |
C4—C5 | 1.381 (7) | ||
O1—Pb—N2 | 64.75 (12) | N2—C6—C7 | 122.3 (4) |
O1—Pb—N4i | 83.77 (14) | C1—C6—C7 | 120.9 (4) |
N2—Pb—N4i | 90.17 (13) | C6—C7—H7A | 109.5 |
O1—Pb—N1 | 126.27 (12) | C6—C7—H7B | 109.5 |
N2—Pb—N1 | 63.45 (12) | H7A—C7—H7B | 109.5 |
N4i—Pb—N1 | 83.07 (13) | C6—C7—H7C | 109.5 |
C8—O1—Pb | 116.9 (3) | H7A—C7—H7C | 109.5 |
C1—N1—C5 | 117.8 (4) | H7B—C7—H7C | 109.5 |
C1—N1—Pb | 117.6 (3) | O1—C8—N3 | 126.7 (4) |
C5—N1—Pb | 123.9 (3) | O1—C8—C9 | 119.3 (4) |
C6—N2—N3 | 116.7 (4) | N3—C8—C9 | 114.1 (4) |
C6—N2—Pb | 125.0 (3) | C13—C9—C10 | 118.6 (4) |
N3—N2—Pb | 118.2 (3) | C13—C9—C8 | 121.4 (4) |
C8—N3—N2 | 111.5 (4) | C10—C9—C8 | 120.0 (4) |
C12—N4—C11 | 117.9 (4) | C11—C10—C9 | 118.4 (5) |
C12—N4—Pbii | 123.8 (3) | C11—C10—H10 | 120.8 |
C11—N4—Pbii | 118.3 (3) | C9—C10—H10 | 120.8 |
N1—C1—C2 | 122.0 (5) | N4—C11—C10 | 123.0 (5) |
N1—C1—C6 | 116.5 (4) | N4—C11—H11 | 118.5 |
C2—C1—C6 | 121.6 (5) | C10—C11—H11 | 118.5 |
C3—C2—C1 | 118.8 (5) | N4—C12—C13 | 122.8 (5) |
C3—C2—H2 | 120.6 | N4—C12—H12 | 118.6 |
C1—C2—H2 | 120.6 | C13—C12—H12 | 118.6 |
C2—C3—C4 | 120.2 (5) | C9—C13—C12 | 119.4 (5) |
C2—C3—H3 | 119.9 | C9—C13—H13 | 120.3 |
C4—C3—H3 | 119.9 | C12—C13—H13 | 120.3 |
C3—C4—C5 | 118.2 (5) | O3—Cl1—O2 | 108.6 (5) |
C3—C4—H4 | 120.9 | O3—Cl1—O4 | 106.9 (4) |
C5—C4—H4 | 120.9 | O2—Cl1—O4 | 112.7 (4) |
N1—C5—C4 | 123.1 (5) | O3—Cl1—O5 | 112.5 (5) |
N1—C5—H5 | 118.5 | O2—Cl1—O5 | 108.5 (4) |
C4—C5—H5 | 118.5 | O4—Cl1—O5 | 107.7 (4) |
N2—C6—C1 | 116.8 (4) | ||
N2—Pb—O1—C8 | −10.2 (3) | C3—C4—C5—N1 | −0.4 (9) |
N4i—Pb—O1—C8 | −103.3 (4) | N3—N2—C6—C1 | 178.8 (4) |
N1—Pb—O1—C8 | −26.7 (4) | Pb—N2—C6—C1 | −0.9 (6) |
O1—Pb—N1—C1 | 23.1 (4) | N3—N2—C6—C7 | −2.2 (7) |
N2—Pb—N1—C1 | 6.4 (3) | Pb—N2—C6—C7 | 178.1 (3) |
N4i—Pb—N1—C1 | 100.1 (3) | N1—C1—C6—N2 | 7.1 (7) |
O1—Pb—N1—C5 | −166.7 (4) | C2—C1—C6—N2 | −172.7 (4) |
N2—Pb—N1—C5 | 176.6 (4) | N1—C1—C6—C7 | −171.9 (4) |
N4i—Pb—N1—C5 | −89.7 (4) | C2—C1—C6—C7 | 8.2 (7) |
O1—Pb—N2—C6 | −167.9 (4) | Pb—O1—C8—N3 | 8.1 (6) |
N4i—Pb—N2—C6 | −84.9 (4) | Pb—O1—C8—C9 | −172.5 (3) |
N1—Pb—N2—C6 | −2.7 (3) | N2—N3—C8—O1 | 3.4 (7) |
O1—Pb—N2—N3 | 12.4 (3) | N2—N3—C8—C9 | −176.0 (4) |
N4i—Pb—N2—N3 | 95.4 (3) | O1—C8—C9—C13 | −169.0 (5) |
N1—Pb—N2—N3 | 177.6 (3) | N3—C8—C9—C13 | 10.5 (7) |
C6—N2—N3—C8 | 167.1 (4) | O1—C8—C9—C10 | 12.2 (7) |
Pb—N2—N3—C8 | −13.1 (5) | N3—C8—C9—C10 | −168.3 (4) |
C5—N1—C1—C2 | −0.4 (7) | C13—C9—C10—C11 | −0.8 (8) |
Pb—N1—C1—C2 | 170.4 (4) | C8—C9—C10—C11 | 178.0 (4) |
C5—N1—C1—C6 | 179.8 (5) | C12—N4—C11—C10 | 0.3 (8) |
Pb—N1—C1—C6 | −9.5 (5) | Pbii—N4—C11—C10 | −176.6 (4) |
N1—C1—C2—C3 | 0.2 (8) | C9—C10—C11—N4 | −0.2 (8) |
C6—C1—C2—C3 | −179.9 (5) | C11—N4—C12—C13 | 0.7 (9) |
C1—C2—C3—C4 | −0.2 (9) | Pbii—N4—C12—C13 | 177.4 (4) |
C2—C3—C4—C5 | 0.2 (9) | C10—C9—C13—C12 | 1.7 (8) |
C1—N1—C5—C4 | 0.5 (8) | C8—C9—C13—C12 | −177.1 (5) |
Pb—N1—C5—C4 | −169.7 (4) | N4—C12—C13—C9 | −1.7 (9) |
Symmetry codes: (i) x−1/2, −y+3/2, z−1/2; (ii) x+1/2, −y+3/2, z+1/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
C3—H3···O3iii | 0.93 | 2.53 | 3.422 (10) | 160 |
C4—H4···O1iv | 0.93 | 2.45 | 3.277 (7) | 148 |
C10—H10···O2v | 0.93 | 2.57 | 3.485 (8) | 170 |
Symmetry codes: (iii) x−1/2, −y+1/2, z−1/2; (iv) −x+1/2, y−1/2, −z+3/2; (v) −x+1, −y+1, −z+2. |
Experimental details
Crystal data | |
Chemical formula | [Pb(C13H11N4O)]ClO4 |
Mr | 545.90 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 293 |
a, b, c (Å) | 10.0620 (6), 14.4431 (8), 11.1456 (7) |
β (°) | 99.174 (1) |
V (Å3) | 1599.03 (16) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 10.75 |
Crystal size (mm) | 0.29 × 0.11 × 0.10 |
Data collection | |
Diffractometer | Bruker SMART CCD |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.691, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8396, 2811, 2392 |
Rint | 0.026 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.022, 0.056, 1.07 |
No. of reflections | 2811 |
No. of parameters | 218 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.55, −0.45 |
Computer programs: SMART (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 2006), publCIF (Westrip, 2010).
Pb—O1 | 2.405 (3) | Pb—N2 | 2.456 (4) |
Pb—N1 | 2.597 (4) | Pb—N4i | 2.472 (4) |
Symmetry code: (i) x−1/2, −y+3/2, z−1/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
C3—H3···O3ii | 0.93 | 2.53 | 3.422 (10) | 160 |
C4—H4···O1iii | 0.93 | 2.45 | 3.277 (7) | 148 |
C10—H10···O2iv | 0.93 | 2.57 | 3.485 (8) | 170 |
Symmetry codes: (ii) x−1/2, −y+1/2, z−1/2; (iii) −x+1/2, y−1/2, −z+3/2; (iv) −x+1, −y+1, −z+2. |
Footnotes
‡Additional correspondence author, e-mail: shahverdizadeh@iaut.ac.ir.
Acknowledgements
The authors thank the Islamic Azad University for support.
References
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Structural studies of coordination complexes containing the N'-[1-(2-pyridyl)ethylidene]isonicotinohydrazide ligand are rare (Maurya et al., 2002; Abboud et al., 2007; Zhang & Liu, 2009; Hao et al., 2010). In each of these, the ligand coordinates in a tridentate mode with the terminal 4-pyridyl-N atom being non-coordinating. In the title lead(II) complex, (I), all four donor atoms participate in coordination of the Pb atom.
The asymmetric unit of (I), Fig. 1, comprises a Pb atom, a N'-[1-(2-pyridyl)ethylidene]isonicotinohydrazide anion and a perchlorate anion. The N'-[1-(2-pyridyl)ethylidene]isonicotinohydrazide ligand coordinates a lead atom in a tridentate mode, via the N1, N2 and O1 atoms, and simultaneously bridges a symmetry related lead atom via the 4-pyridyl-N4 atom, Table 1.
The resultant N3O donor set plus the lone pair of electrons is based on a trigonal bipyramid with the O1 and N1 atoms in axial positions [O1—Pb—N1 = 126.27 (12)°] and the remaining N atoms [N2—Pb—N4i = 90.17 (13)°] and lone pair in equatorial positions; symmetry operation i: -1/2 + x, 1.5 - y, -1/2 + z. The µ2-bridging mode of the tetradentate N'-[1-(2-pyridyl)ethylidene]isonicotinohydrazide ligand leads to a zigzag chain along the a axis, Fig. 2. The considerable distortions from the ideal geometry arise from the acute chelate angles (O1—Pb—N2 = 64.75 (12)° and N1—Pb—N2 = 63.45 (12)°) as well as the close approach of other donor atoms. Most notable amongst the latter are Pb···O(perchlorate) interactions with the two shortest contacts being Pb···O4ii of 3.133 (6) Å and Pb···O5iii = 3.287 (7) Å for i: -1 + x, y, z and ii: 1 - x, 1 - y, 2 - z. These interactions along with Pb···N3iii contacts of 3.028 (4) Å [iii: 1 - x, 1 - y, 2 - z] generate a three-dimensional architecture, Fig. 3.