Di-μ-chlorido-bis­{[1,2-bis­(pyridin-2-ylmeth­oxy)benzene-κ4 N,O,O′,N′]chloridocadmium}

Jin-Sheng Gao; Ying-Hui Yu; Ying Liu; Guang-Feng Hou

doi:10.1107/S1600536811037858

. 2011 Sep 30;67(Pt 10):m1415. doi: 10.1107/S1600536811037858

Di-μ-chlorido-bis{[1,2-bis(pyridin-2-ylmethoxy)benzene-κ⁴ N,O,O′,N′]chloridocadmium}

Jin-Sheng Gao ^a,^b,^*, Ying-Hui Yu ^a,^b, Ying Liu ^b, Guang-Feng Hou ^a,^b

PMCID: PMC3201405 PMID: 22064381

Abstract

In centrosymmetric dinuclear title compound, [Cd₂Cl₄(C₁₈H₁₆N₂O₂)₂], the Cd^II atom is seven-coordinated in a pentagonal–bipyramidal environment defined by two N atoms and two O atoms from one ligand and three Cl⁻ anions, two of which are bridging. A π–π interaction between adjacent pyridine rings [centroid–centroid distance = 3.773 (1) Å] further stablizes the dimer.

Related literature

For general background to flexible bipyridyl-based ligands, see: Wang et al. (2004) ▶; Oh et al. (2005) ▶. For the synthesis of the ligand, see: Liu et al. (2010a ▶,b ▶). For a related structure, see: Liu et al. (2011 ▶).

Experimental

Crystal data

[Cd₂Cl₄(C₁₈H₁₆N₂O₂)₂]
M _r = 951.26
Monoclinic,
a = 10.833 (2) Å
b = 10.968 (2) Å
c = 16.095 (3) Å
β = 109.14 (3)°
V = 1806.6 (6) Å³
Z = 2
Mo Kα radiation
μ = 1.52 mm⁻¹
T = 293 K
0.23 × 0.22 × 0.20 mm

Data collection

Rigaku R-AXIS RAPID diffractometer
Absorption correction: multi-scan (ABSCOR; Higashi, 1995 ▶) T _min = 0.722, T _max = 0.751
17295 measured reflections
4128 independent reflections
3686 reflections with I > 2σ(I)
R _int = 0.021

Refinement

R[F ² > 2σ(F ²)] = 0.019
wR(F ²) = 0.048
S = 1.05
4128 reflections
226 parameters
H-atom parameters constrained
Δρ_max = 0.36 e Å⁻³
Δρ_min = −0.24 e Å⁻³

Data collection: RAPID-AUTO (Rigaku, 1998 ▶); cell refinement: RAPID-AUTO; data reduction: CrystalClear (Rigaku/MSC, 2002 ▶); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: SHELXTL (Sheldrick, 2008 ▶); software used to prepare material for publication: SHELXL97.

Supplementary Material

Crystal structure: contains datablock(s) I, global. DOI: 10.1107/S1600536811037858/ng5223sup1.cif

e-67-m1415-sup1.cif^{(24.8KB, cif)}

Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536811037858/ng5223Isup2.hkl

e-67-m1415-Isup2.hkl^{(202.3KB, hkl)}

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

Table 1. Selected bond lengths (Å).

Cd1—N2	2.3920 (15)
Cd1—N1	2.3958 (15)
Cd1—Cl2	2.5103 (6)
Cd1—O1	2.6197 (14)
Cd1—Cl1	2.6197 (6)
Cd1—O2	2.6288 (14)
Cd1—Cl1ⁱ	2.6873 (11)

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Symmetry code: (i) Inline graphic .

Acknowledgments

The authors thank the Project of Innovation Service Platform of Heilongjiang Province (PG09J001) and Heilongjiang University for supporting this work.

supplementary crystallographic information

Comment

Aromatic molecules containing two pyridyl groups have been widely used as building blocks for new supramolecular architectures in recent years. Compared with rigid bridging ligands, flexible bipyridine ligands are able to generate some unusual frameworks (Wang et al., 2004; Oh et al., 2005). In continuation of previous works (Liu et al., 2010a; 2010b), we report the crystal structure of the title compound.

In centrosymmetric dinuclear [CdCl2(C18H16N2O2)]2, the CdII atom is seven-coordinated in a pentagonal bipyramidal environment defined by two N atoms and two O atoms from one ligand and three chlorides. Two of chlorides serve are bridging. A π—π interaction between adjacent pyridine rings [center to center distance 3.773?(1)?Å] further stablizes the dimer (Fig. 1, Table 1).

Experimental

The 1,2-bis(pyridin-2-ylmethoxy)benzene ligand was synthesized according to a literature method (Liu et al.,2010a). A solution of CdCl₂^.5H₂O (0.2 mmol,0.0456 g) in water (2 ml) was added to a solution of the ligand (0.2 mmol, 0.0584 g) in 5 ml methanol under constant stirring; the solution was stirred for about 1 hour and then filted. The filtate was maintained for about one week under room temperature to give colorless block-like crystals.