catena-Poly[zinc(II)-bis­[μ-2-(2,4-dichloro­phen­oxy)acetato]]

Shi-Zhu Liu

doi:10.1107/S1600536810015977

. 2010 May 8;66(Pt 6):m621. doi: 10.1107/S1600536810015977

catena-Poly[zinc(II)-bis[μ-2-(2,4-dichlorophenoxy)acetato]]

Shi-Zhu Liu ^a,^*

PMCID: PMC2979562 PMID: 21579279

Abstract

The title polymeric compound, [Zn(C₈H₅Cl₂O₃)₂]_n, was prepared by reaction of zinc(II) chloride with 2,4-dichlorophenoxyacetic acid and sodium hydroxide under hydrothermal conditions. The Zn^II atom is coordinated in a distorted tetrahedral environment by four O atoms from four 2,4-dichlorophenoxyacetate ligands. Each ligand bridges two Zn^II atoms, forming a polymeric chain along the a axis. Adjacent chains are connected via C—H⋯Cl hydrogen bonds.

Related literature

For metal-organic coordination polymers, see: Qin et al. (2009 ▶); Huang et al. (2008 ▶); Reineke et al. (1999 ▶); Xiong et al. (2002 ▶).

Experimental

Crystal data

[Zn(C₈H₅Cl₂O₃)₂]
M _r = 505.43
Triclinic,
a = 4.7322 (10) Å
b = 10.459 (2) Å
c = 18.979 (4) Å
α = 79.340 (2)°
β = 89.838 (2)°
γ = 82.847 (3)°
V = 915.8 (3) Å³
Z = 2
Mo Kα radiation
μ = 1.96 mm⁻¹
T = 296 K
0.56 × 0.21 × 0.16 mm

Data collection

Bruker SMART APEXII CCD diffractometer
Absorption correction: multi-scan (SADABS; Sheldrick, 1996 ▶) T _min = 0.617, T _max = 0.731
4737 measured reflections
3255 independent reflections
2849 reflections with I > 2σ(I)
R _int = 0.021

Refinement

R[F ² > 2σ(F ²)] = 0.030
wR(F ²) = 0.091
S = 0.94
3255 reflections
244 parameters
H-atom parameters constrained
Δρ_max = 0.34 e Å⁻³
Δρ_min = −0.39 e Å⁻³

Data collection: APEX2 (Bruker, 2004 ▶); cell refinement: SAINT (Bruker, 2004 ▶); data reduction: SAINT; 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: SHELXTL.

Supplementary Material

Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536810015977/ci5084sup1.cif

e-66-0m621-sup1.cif^{(17.2KB, cif)}

Structure factors: contains datablocks I. DOI: 10.1107/S1600536810015977/ci5084Isup2.hkl

e-66-0m621-Isup2.hkl^{(159.6KB, hkl)}

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

Table 1. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C2—H2B⋯Cl2ⁱ	0.97	2.73	3.610 (3)	151

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Symmetry code: (i) Inline graphic .

Acknowledgments

The author acknowledges South China Normal University for supporting this work.

supplementary crystallographic information

Experimental

A mixture of ZnCl₂ (0.068 g, 0.5 mmol), H₂O (6 ml), 2,4-dichlorophenoxyacetic acid (0.22 g, 1 mmol) was stirred vigorously for 10 min and then sodium hydroxide solution (1.0 mol/L) was added to adjust the pH value to 7.0. The mixture was then sealed in a 25 ml Teflon-lined stainless-steel autoclave. The autoclave was heated at 413 K for 3 d and then slowly cooled to room temperature at 6 K/h. The product was collected by filtration, washed with water and air-dried. Colourless needle-shaped crystals were obtained in ca. 42.3% yield based on Zn.