Bis(μ-biphenyl-2,2′-dicarboxyl­ato)bis­[aqua­(2,2′-bipyridine)cadmium(II)]

Lin, P.-X.; Cheng, Y.; Mai, Y.-L.; An, Z.

doi:10.1107/S1600536810016387

Volume 66
Part 6
Page m637
June 2010

Received 27 April 2010
Accepted 5 May 2010
Online 12 May 2010

Key indicators
Single-crystal X-ray study
T = 295 K
Mean (C-C) = 0.004 Å
R = 0.025
wR = 0.063
Data-to-parameter ratio = 12.5
Details

Bis(-biphenyl-2,2'-dicarboxylato)bis[aqua(2,2'-bipyridine)cadmium(II)]

Pei-Xi Lin,^a Yan Cheng,^b Yu-Lian Mai ^a and Zhe An ^a ^*

^aSchool of Chemistry and Life Science, Maoming University, Maoming 525000, People's Republic of China, and ^bDepartment of Pharmacy, Mudanjiang Medical University, Mudanjiang, 157011, People's Republic of China
Correspondence e-mail: anzhe6409@sina.com

In the centrosymmetric dinuclear molecule of the title compound, [Cd₂(C₁₄H₈O₄)₂(C₁₀H₈N₂)₂(H₂O)₂], the Cd²⁺ ion is coordinated by three O atoms from two different diphenyldicarboxylate (dpa) ligands (one O,O'-bidentate and one monodentate), a chelating bipyridine ligand and a water molecule, generating an extremely distorted trigonal-prismatic (or irregular) CdN₂O₄ coordination geometry for the metal ion. The bridging ligands generate an 18-membered ring, which is stabilized by two pairs of intramolecular O-HO hydrogen bonds.

Related literature

For background to coordination polymers, see: Hagrman et al. (1999); Ghosh & Bharadwaj (2004); Evans et al. (1999).

Experimental

Crystal data

[Cd₂(C₁₄H₈O₄)₂(C₁₀H₈N₂)₂(H₂O)₂]
M_r = 1053.61
Monoclinic, P 2₁ /n
a = 11.532 (2) Å
b = 10.961 (2) Å
c = 16.891 (3) Å
= 98.37 (3)°
V = 2112.4 (7) Å³
Z = 2
Mo K radiation
= 1.07 mm^-1
T = 295 K
0.12 × 0.10 × 0.08 mm

Data collection

Bruker APEXII CCD diffractometer
Absorption correction: multi-scan (SADABS; Bruker, 2001) T_min = 0.882, T_max = 0.919
15936 measured reflections
3697 independent reflections
3223 reflections with I > 2(I)
R_int = 0.030

Refinement

R[F² > 2(F²)] = 0.025
wR(F²) = 0.063
S = 1.00
3697 reflections
295 parameters
H atoms treated by a mixture of independent and constrained refinement
_max = 0.59 e Å^-3
_min = -0.26 e Å^-3

Table 1
Selected bond lengths (Å)

Cd1-O4	2.1960 (18)
Cd1-O1	2.2540 (18)
Cd1-N2	2.324 (2)
Cd1-N1	2.362 (2)
Cd1-O5	2.385 (2)
Cd1-O2	2.586 (2)

Table 2
Hydrogen-bond geometry (Å, °)

D-HA	D-H	HA	DA	D-HA
O5-H1WO4ⁱ	0.81 (4)	1.94 (4)	2.738 (3)	168 (4)
O5-H2WO2ⁱ	0.80 (4)	2.28 (4)	2.932 (3)	138 (3)
Symmetry code: (i) -x+1, -y+1, -z.

Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT-Plus (Bruker, 2001); data reduction: SAINT-Plus; 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 data and figures for this paper are available from the IUCr electronic archives (Reference: HB5426 ).

Acknowledgements

The authors acknowledge financial support from the program for talent introduction in Guangdong Higher Education Institutions (grant No. 201191) and the scientific research start-up funds of talent introduction in Maoming University (grant No. 208058).

References

Bruker (2001). SAINT-Plus and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.
Bruker (2004). APEX2. Bruker AXS Inc., Madison, Wisconsin, USA.
Evans, O. R., Xiong, R., Wang, Z., Wong, G. K. & Lin, W. (1999). Angew. Chem. Int. Ed. 111, 557-559.
Ghosh, S. K. & Bharadwaj, P. K. (2004). Inorg. Chem. 43, 2293-2298.
Hagrman, P. J., Hagrman, D. & Zubieta, J. (1999). Angew. Chem. Int. Ed. 38, 2638-2684.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.

metal-organic compounds