metal-organic compounds
(2,2′-Bipyridine-κ2N,N′)dibromidopalladium(II) dichloromethane solvate
aSchool of Applied Chemical Engineering, The Research Institute of Catalysis, Chonnam National University, Gwangju 500-757, Republic of Korea
*Correspondence e-mail: hakwang@chonnam.ac.kr
In the title compound, [PdBr2(C10H8N2)]·CH2Cl2, the Pd2+ ion is four-coordinated in a slightly distorted square-planar environment by two N atoms of the chelating 2,2′-bipyridine ligand and two bromide ions. The compound displays intramolecular C—H⋯Br hydrogen bonds and pairs of complex molecules are assembled by intermolecular C—H⋯Br hydrogen bonds. These pairs are connected by additional C—H⋯Br hydrogen bonds, forming a layer structure extending parallel to (011). Intermolecular π–π interactions between the pyridine rings of the ligand are also present, the shortest centroid–centroid distance being 4.090 (9) Å.
Related literature
For the crystal structures of [PdX2(bipy)] (X = Cl or Br), see: Maekawa et al. (1991); Smeets et al. (1997). For the of [PdCl2(bipy)]·CH2Cl2 which is isotypic to the title compound, see: Vicente et al. (1997); Kim et al. (2009a). For related Pt(II, IV)-bipyridine complexes, see: Osborn & Rogers (1974); Hambley (1986); Sartori et al. (2005); Momeni et al. (2007); Kim et al. (2009b).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2000); cell SAINT (Bruker, 2000); 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 PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S1600536809039701/wm2260sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536809039701/wm2260Isup2.hkl
To a solution of K2PdBr4 (0.100 g, 0.198 mmol) in EtOH (10 ml) was added 2,2'-bipyridine (0.031 g, 0.198 mmol), and refluxed for 4 h. The precipitate obtained was separated by filtration and washed with EtOH and water and dried under vacuum to give an orange powder (0.054 g). Crystals suitable for X-ray analysis were obtained by slow evaporation from a CH2Cl2 solution.
H atoms were positioned geometrically and allowed to ride on their respective parent atoms [C—H = 0.95 (CH) or 0.99 (CH2) Å and Uiso(H) = 1.2Ueq(C)]. The highest peak and the deepest hole in the final Fourier map are 1.30 Å from atom Pd1 and 0.81 Å from the same atom.
The 1, whereas the previously reported solvent-free complex [PdBr2(C10H8N2)] crystallizes in the monoclinic C2/c (Smeets et al., 1997).
of the title compound, [PdBr2(C10H8N2)].CH2Cl2, contains a neutral PdII complex and a solvent molecule (Fig. 1). The compound crystallizes in the triclinic PIn the title complex, the Pd2+ ion is four-coordinated in a slightly distorted square-planar environment by two N atoms of the 2,2'-bipyridine (bipy) ligand and two Br anions. The main contribution to the distortion is the tight N1—Pd1—N2 chelate angle (80.6 (5)°), which results in a non-linear trans arrangement (<N1—Pd1—Br1 = 175.7 (3)° and <N2—Pd1—Br2 = 175.7 (4)°). Each of the two Pd1—N and Pd1—Br bond lengths are almost equal, (Pd1—N: 2.042 (9) and 2.051 (11) Å; Pd1—Br 2.4182 (18) and 2.4044 (19) Å), and close to those reported for [PdBr2(C10H8N2)] (Smeets et al., 1997). The compound displays inter- and intramolecular C—H···Br hydrogen bonds (Table 1). Pairs of complex molecules are assembled by intermolecular hydrogen bonds, and the dichloromethane solvent molecules connect the pairs by intermolecular hydrogen bonds, thereby forming a layer structure extending parallel to (011) (Fig. 2). There may also be intermolecular π-π interactions between adjacent pyridine rings of the lignad (the for second plane is -x,-y,-z), with a shortest centroid-centroid distance of 4.090 (9) Å, and the planes are parallel and shifted for 1.758 Å.
For the crystal structures of related palladium(II) halogenides with bipyridine ligands, [PdX2(bipy)], where X = Cl or Br, see: Maekawa et al. (1991); Smeets et al. (1997). For [PdCl2(bipy)].CH2Cl2 that crystallizes isotypically with the title compound, see: Vicente et al. (1997); Kim et al. (2009a). For related Pt(II, IV)-bipyridine complexes, see: Osborn & Rogers (1974); Hambley (1986); Sartori et al. (2005); Momeni et al. (2007); Kim et al. (2009b).
For the crystal structures of [PdX2(bipy)] (X = Cl or Br), see: Maekawa et al. (1991); Smeets et al. (1997). For the
of [PdCl2(bipy)].CH2Cl2 which is isotypic to the title compound, see: Vicente et al. (1997); Kim et al. (2009a). For related Pt(II, IV)-bipyridine complexes, see: Osborn & Rogers (1974); Hambley (1986); Sartori et al. (2005); Momeni et al. (2007); Kim et al. (2009b).Data collection: SMART (Bruker, 2000); cell
SAINT (Bruker, 2000); data reduction: SAINT (Bruker, 2000); 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 PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).[PdBr2(C10H8N2)]·CH2Cl2 | Z = 2 |
Mr = 507.33 | F(000) = 480 |
Triclinic, P1 | Dx = 2.300 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 8.9323 (10) Å | Cell parameters from 1623 reflections |
b = 9.3035 (10) Å | θ = 2.3–26.7° |
c = 10.0113 (11) Å | µ = 7.07 mm−1 |
α = 72.882 (2)° | T = 200 K |
β = 67.292 (2)° | Block, dark orange |
γ = 80.995 (2)° | 0.22 × 0.15 × 0.11 mm |
V = 732.60 (14) Å3 |
Bruker SMART 1000 CCD diffractometer | 3574 independent reflections |
Radiation source: fine-focus sealed tube | 2195 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.038 |
φ and ω scans | θmax = 28.3°, θmin = 2.3° |
Absorption correction: multi-scan (SADABS; Bruker, 2000) | h = −11→11 |
Tmin = 0.707, Tmax = 1.000 | k = −12→12 |
5486 measured reflections | l = −13→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)] = 0.068 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.188 | H-atom parameters constrained |
S = 1.14 | w = 1/[σ2(Fo2) + 21.2252P] where P = (Fo2 + 2Fc2)/3 |
3574 reflections | (Δ/σ)max < 0.001 |
163 parameters | Δρmax = 2.13 e Å−3 |
0 restraints | Δρmin = −3.43 e Å−3 |
[PdBr2(C10H8N2)]·CH2Cl2 | γ = 80.995 (2)° |
Mr = 507.33 | V = 732.60 (14) Å3 |
Triclinic, P1 | Z = 2 |
a = 8.9323 (10) Å | Mo Kα radiation |
b = 9.3035 (10) Å | µ = 7.07 mm−1 |
c = 10.0113 (11) Å | T = 200 K |
α = 72.882 (2)° | 0.22 × 0.15 × 0.11 mm |
β = 67.292 (2)° |
Bruker SMART 1000 CCD diffractometer | 3574 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2000) | 2195 reflections with I > 2σ(I) |
Tmin = 0.707, Tmax = 1.000 | Rint = 0.038 |
5486 measured reflections |
R[F2 > 2σ(F2)] = 0.068 | 0 restraints |
wR(F2) = 0.188 | H-atom parameters constrained |
S = 1.14 | w = 1/[σ2(Fo2) + 21.2252P] where P = (Fo2 + 2Fc2)/3 |
3574 reflections | Δρmax = 2.13 e Å−3 |
163 parameters | Δρmin = −3.43 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 | ||
Pd1 | 0.17533 (13) | 0.20690 (12) | 0.28502 (12) | 0.0321 (3) | |
Br1 | 0.1261 (2) | 0.47367 (16) | 0.19026 (18) | 0.0424 (4) | |
Br2 | 0.3633 (2) | 0.26600 (18) | 0.3779 (2) | 0.0491 (4) | |
N1 | 0.2025 (13) | −0.0210 (11) | 0.3616 (12) | 0.028 (2) | |
N2 | 0.0139 (13) | 0.1409 (13) | 0.2168 (14) | 0.036 (3) | |
C1 | 0.3048 (18) | −0.0927 (14) | 0.4310 (15) | 0.036 (3) | |
H1 | 0.3742 | −0.0363 | 0.4462 | 0.043* | |
C2 | 0.3107 (19) | −0.2513 (16) | 0.4819 (17) | 0.042 (4) | |
H2 | 0.3822 | −0.3021 | 0.5325 | 0.051* | |
C3 | 0.2123 (18) | −0.3299 (16) | 0.4572 (17) | 0.043 (4) | |
H3 | 0.2171 | −0.4369 | 0.4870 | 0.052* | |
C4 | 0.1059 (19) | −0.2536 (15) | 0.3888 (16) | 0.039 (3) | |
H4 | 0.0338 | −0.3090 | 0.3760 | 0.047* | |
C5 | 0.1007 (15) | −0.0985 (15) | 0.3378 (15) | 0.033 (3) | |
C6 | −0.0030 (16) | −0.0117 (16) | 0.2607 (16) | 0.036 (3) | |
C7 | −0.1125 (18) | −0.0734 (18) | 0.2308 (17) | 0.043 (4) | |
H7 | −0.1228 | −0.1793 | 0.2599 | 0.052* | |
C8 | −0.210 (2) | 0.0237 (19) | 0.1559 (18) | 0.050 (4) | |
H8 | −0.2888 | −0.0153 | 0.1361 | 0.060* | |
C9 | −0.188 (2) | 0.1730 (18) | 0.1129 (18) | 0.049 (4) | |
H9 | −0.2510 | 0.2396 | 0.0603 | 0.059* | |
C10 | −0.0763 (18) | 0.2292 (19) | 0.1449 (17) | 0.043 (4) | |
H10 | −0.0636 | 0.3348 | 0.1143 | 0.051* | |
C11 | 0.5407 (19) | 0.6259 (17) | 0.1286 (19) | 0.048 (4) | |
H11A | 0.4406 | 0.5743 | 0.2001 | 0.058* | |
H11B | 0.5875 | 0.5785 | 0.0437 | 0.058* | |
Cl1 | 0.4918 (5) | 0.8180 (5) | 0.0621 (5) | 0.0515 (10) | |
Cl2 | 0.6808 (6) | 0.6039 (5) | 0.2181 (6) | 0.0662 (13) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Pd1 | 0.0322 (6) | 0.0287 (5) | 0.0372 (6) | −0.0048 (4) | −0.0124 (5) | −0.0096 (4) |
Br1 | 0.0503 (9) | 0.0281 (7) | 0.0507 (10) | −0.0036 (6) | −0.0195 (7) | −0.0104 (6) |
Br2 | 0.0533 (10) | 0.0378 (8) | 0.0684 (12) | −0.0122 (7) | −0.0345 (9) | −0.0089 (8) |
N1 | 0.032 (6) | 0.015 (5) | 0.033 (6) | −0.001 (4) | −0.017 (5) | 0.004 (4) |
N2 | 0.022 (6) | 0.040 (7) | 0.053 (8) | −0.006 (5) | −0.013 (5) | −0.018 (6) |
C1 | 0.051 (9) | 0.015 (6) | 0.037 (8) | −0.003 (6) | −0.018 (7) | 0.004 (5) |
C2 | 0.047 (9) | 0.027 (7) | 0.052 (10) | 0.004 (6) | −0.024 (8) | −0.003 (6) |
C3 | 0.045 (9) | 0.024 (7) | 0.042 (9) | −0.001 (6) | 0.002 (7) | −0.005 (6) |
C4 | 0.055 (9) | 0.024 (7) | 0.036 (8) | −0.003 (6) | −0.021 (7) | 0.001 (6) |
C5 | 0.020 (6) | 0.041 (8) | 0.040 (8) | −0.006 (6) | −0.001 (5) | −0.024 (6) |
C6 | 0.027 (7) | 0.040 (8) | 0.041 (8) | −0.010 (6) | −0.009 (6) | −0.011 (6) |
C7 | 0.041 (9) | 0.046 (9) | 0.043 (9) | −0.011 (7) | −0.016 (7) | −0.006 (7) |
C8 | 0.053 (10) | 0.053 (10) | 0.055 (11) | −0.008 (8) | −0.035 (9) | −0.007 (8) |
C9 | 0.051 (10) | 0.048 (9) | 0.054 (10) | −0.010 (8) | −0.034 (8) | 0.006 (8) |
C10 | 0.045 (9) | 0.059 (10) | 0.045 (9) | −0.007 (7) | −0.037 (7) | −0.014 (7) |
C11 | 0.041 (9) | 0.045 (9) | 0.055 (10) | −0.016 (7) | −0.004 (8) | −0.018 (8) |
Cl1 | 0.055 (2) | 0.045 (2) | 0.055 (3) | −0.0045 (18) | −0.026 (2) | −0.0050 (18) |
Cl2 | 0.069 (3) | 0.052 (3) | 0.091 (4) | 0.003 (2) | −0.052 (3) | −0.008 (2) |
Pd1—N1 | 2.042 (9) | C4—H4 | 0.9500 |
Pd1—N2 | 2.051 (11) | C5—C6 | 1.43 (2) |
Pd1—Br2 | 2.4044 (19) | C6—C7 | 1.371 (19) |
Pd1—Br1 | 2.4182 (18) | C7—C8 | 1.41 (2) |
N1—C1 | 1.338 (17) | C7—H7 | 0.9500 |
N1—C5 | 1.370 (15) | C8—C9 | 1.35 (2) |
N2—C10 | 1.317 (18) | C8—H8 | 0.9500 |
N2—C6 | 1.371 (17) | C9—C10 | 1.373 (19) |
C1—C2 | 1.412 (17) | C9—H9 | 0.9500 |
C1—H1 | 0.9500 | C10—H10 | 0.9500 |
C2—C3 | 1.36 (2) | C11—Cl2 | 1.757 (17) |
C2—H2 | 0.9500 | C11—Cl1 | 1.763 (16) |
C3—C4 | 1.37 (2) | C11—H11A | 0.9900 |
C3—H3 | 0.9500 | C11—H11B | 0.9900 |
C4—C5 | 1.382 (18) | ||
N1—Pd1—N2 | 80.6 (5) | N1—C5—C4 | 117.9 (13) |
N1—Pd1—Br2 | 95.3 (3) | N1—C5—C6 | 117.2 (12) |
N2—Pd1—Br2 | 175.7 (4) | C4—C5—C6 | 124.9 (12) |
N1—Pd1—Br1 | 175.7 (3) | C7—C6—N2 | 120.9 (14) |
N2—Pd1—Br1 | 95.1 (3) | C7—C6—C5 | 123.7 (13) |
Br2—Pd1—Br1 | 88.90 (6) | N2—C6—C5 | 115.4 (12) |
C1—N1—C5 | 121.3 (11) | C6—C7—C8 | 118.5 (15) |
C1—N1—Pd1 | 125.6 (9) | C6—C7—H7 | 120.7 |
C5—N1—Pd1 | 113.0 (9) | C8—C7—H7 | 120.7 |
C10—N2—C6 | 119.5 (12) | C9—C8—C7 | 118.9 (15) |
C10—N2—Pd1 | 126.8 (10) | C9—C8—H8 | 120.6 |
C6—N2—Pd1 | 113.6 (10) | C7—C8—H8 | 120.6 |
N1—C1—C2 | 120.6 (13) | C8—C9—C10 | 120.3 (15) |
N1—C1—H1 | 119.7 | C8—C9—H9 | 119.8 |
C2—C1—H1 | 119.7 | C10—C9—H9 | 119.8 |
C3—C2—C1 | 118.8 (14) | N2—C10—C9 | 121.9 (15) |
C3—C2—H2 | 120.6 | N2—C10—H10 | 119.1 |
C1—C2—H2 | 120.6 | C9—C10—H10 | 119.1 |
C2—C3—C4 | 119.4 (13) | Cl2—C11—Cl1 | 110.9 (8) |
C2—C3—H3 | 120.3 | Cl2—C11—H11A | 109.5 |
C4—C3—H3 | 120.3 | Cl1—C11—H11A | 109.5 |
C3—C4—C5 | 121.9 (14) | Cl2—C11—H11B | 109.5 |
C3—C4—H4 | 119.1 | Cl1—C11—H11B | 109.5 |
C5—C4—H4 | 119.1 | H11A—C11—H11B | 108.0 |
N2—Pd1—N1—C1 | 178.3 (12) | C3—C4—C5—N1 | −2 (2) |
Br2—Pd1—N1—C1 | −3.1 (11) | C3—C4—C5—C6 | 177.7 (14) |
N2—Pd1—N1—C5 | −2.9 (9) | C10—N2—C6—C7 | 0 (2) |
Br2—Pd1—N1—C5 | 175.6 (8) | Pd1—N2—C6—C7 | 176.6 (11) |
N1—Pd1—N2—C10 | 179.9 (13) | C10—N2—C6—C5 | 179.8 (13) |
Br1—Pd1—N2—C10 | 0.6 (13) | Pd1—N2—C6—C5 | −3.5 (15) |
N1—Pd1—N2—C6 | 3.5 (9) | N1—C5—C6—C7 | −179.1 (13) |
Br1—Pd1—N2—C6 | −175.8 (9) | C4—C5—C6—C7 | 1 (2) |
C5—N1—C1—C2 | 0 (2) | N1—C5—C6—N2 | 1.1 (18) |
Pd1—N1—C1—C2 | 178.7 (10) | C4—C5—C6—N2 | −178.6 (13) |
N1—C1—C2—C3 | 1 (2) | N2—C6—C7—C8 | −1 (2) |
C1—C2—C3—C4 | −2 (2) | C5—C6—C7—C8 | 179.1 (14) |
C2—C3—C4—C5 | 3 (2) | C6—C7—C8—C9 | 2 (2) |
C1—N1—C5—C4 | 0.4 (19) | C7—C8—C9—C10 | −2 (3) |
Pd1—N1—C5—C4 | −178.4 (10) | C6—N2—C10—C9 | 0 (2) |
C1—N1—C5—C6 | −179.2 (12) | Pd1—N2—C10—C9 | −175.8 (12) |
Pd1—N1—C5—C6 | 2.0 (15) | C8—C9—C10—N2 | 0 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1···Br2 | 0.95 | 2.69 | 3.313 (13) | 124 |
C2—H2···Br2i | 0.95 | 2.84 | 3.659 (16) | 145 |
C10—H10···Br1 | 0.95 | 2.72 | 3.343 (14) | 124 |
C11—H11A···Br2 | 0.99 | 2.92 | 3.693 (15) | 135 |
C11—H11B···Br1ii | 0.99 | 2.81 | 3.668 (16) | 145 |
Symmetry codes: (i) −x+1, −y, −z+1; (ii) −x+1, −y+1, −z. |
Experimental details
Crystal data | |
Chemical formula | [PdBr2(C10H8N2)]·CH2Cl2 |
Mr | 507.33 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 200 |
a, b, c (Å) | 8.9323 (10), 9.3035 (10), 10.0113 (11) |
α, β, γ (°) | 72.882 (2), 67.292 (2), 80.995 (2) |
V (Å3) | 732.60 (14) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 7.07 |
Crystal size (mm) | 0.22 × 0.15 × 0.11 |
Data collection | |
Diffractometer | Bruker SMART 1000 CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2000) |
Tmin, Tmax | 0.707, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5486, 3574, 2195 |
Rint | 0.038 |
(sin θ/λ)max (Å−1) | 0.667 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.068, 0.188, 1.14 |
No. of reflections | 3574 |
No. of parameters | 163 |
H-atom treatment | H-atom parameters constrained |
w = 1/[σ2(Fo2) + 21.2252P] where P = (Fo2 + 2Fc2)/3 | |
Δρmax, Δρmin (e Å−3) | 2.13, −3.43 |
Computer programs: SMART (Bruker, 2000), SAINT (Bruker, 2000), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1···Br2 | 0.95 | 2.69 | 3.313 (13) | 124.0 |
C2—H2···Br2i | 0.95 | 2.84 | 3.659 (16) | 144.7 |
C10—H10···Br1 | 0.95 | 2.72 | 3.343 (14) | 124.2 |
C11—H11A···Br2 | 0.99 | 2.92 | 3.693 (15) | 135.4 |
C11—H11B···Br1ii | 0.99 | 2.81 | 3.668 (16) | 144.7 |
Symmetry codes: (i) −x+1, −y, −z+1; (ii) −x+1, −y+1, −z. |
Acknowledgements
This study was supported financially by the Special Research Program of Chonnam National University, 2009.
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The asymmetric unit of the title compound, [PdBr2(C10H8N2)].CH2Cl2, contains a neutral PdII complex and a solvent molecule (Fig. 1). The compound crystallizes in the triclinic space group P1, whereas the previously reported solvent-free complex [PdBr2(C10H8N2)] crystallizes in the monoclinic space group C2/c (Smeets et al., 1997).
In the title complex, the Pd2+ ion is four-coordinated in a slightly distorted square-planar environment by two N atoms of the 2,2'-bipyridine (bipy) ligand and two Br anions. The main contribution to the distortion is the tight N1—Pd1—N2 chelate angle (80.6 (5)°), which results in a non-linear trans arrangement (<N1—Pd1—Br1 = 175.7 (3)° and <N2—Pd1—Br2 = 175.7 (4)°). Each of the two Pd1—N and Pd1—Br bond lengths are almost equal, (Pd1—N: 2.042 (9) and 2.051 (11) Å; Pd1—Br 2.4182 (18) and 2.4044 (19) Å), and close to those reported for [PdBr2(C10H8N2)] (Smeets et al., 1997). The compound displays inter- and intramolecular C—H···Br hydrogen bonds (Table 1). Pairs of complex molecules are assembled by intermolecular hydrogen bonds, and the dichloromethane solvent molecules connect the pairs by intermolecular hydrogen bonds, thereby forming a layer structure extending parallel to (011) (Fig. 2). There may also be intermolecular π-π interactions between adjacent pyridine rings of the lignad (the symmetry operation for second plane is -x,-y,-z), with a shortest centroid-centroid distance of 4.090 (9) Å, and the planes are parallel and shifted for 1.758 Å.
For the crystal structures of related palladium(II) halogenides with bipyridine ligands, [PdX2(bipy)], where X = Cl or Br, see: Maekawa et al. (1991); Smeets et al. (1997). For [PdCl2(bipy)].CH2Cl2 that crystallizes isotypically with the title compound, see: Vicente et al. (1997); Kim et al. (2009a). For related Pt(II, IV)-bipyridine complexes, see: Osborn & Rogers (1974); Hambley (1986); Sartori et al. (2005); Momeni et al. (2007); Kim et al. (2009b).