Di-μ-chlorido-bis­[(2,2′-bibenzimidazole)chloridocadmium(II)]

Liu, G.

doi:10.1107/S1600536808040968

Volume 65
Part 1
Page m37
January 2009

Received 26 November 2008
Accepted 4 December 2008
Online 10 December 2008

Key indicators
Single-crystal X-ray study
T = 293 K
Mean (C-C) = 0.004 Å
R = 0.033
wR = 0.060
Data-to-parameter ratio = 17.6
Details

Di--chlorido-bis[(2,2'-bibenzimidazole)chloridocadmium(II)]

Ge Liu ^a ^*

^aChifeng University, Chifeng 024000, People's Republic of China
Correspondence e-mail: liu_ge2008@163.com

The title binuclear complex, [Cd₂Cl₄(C₁₄H₁₀N₄)₂], was synthesized by the hydrothermal reaction of CdCl₂ and the ligand 2,2'-bibenzimidazole. The molecule lies on an inversion center and the metal center displays a strongly distorted trigonal-bipyramidal geometry. The Cd^II ions are coordinated by two N atoms from the organic ligand, and by one terminal and two bridging chloride anions. The crystal structure involves intermolecular N-HCl hydrogen bonds, resulting in a one-dimensional supramolecular structure.

Related literature

For the synthesis of 2,2'-bibenzimidazole, see: Fieselmann et al. (1978). For general properties of Cd^II-based complex polymers, see: Meng et al. (2004).

Experimental

Crystal data

[Cd₂Cl₄(C₁₄H₁₀N₄)₂]
M_r = 835.12
Monoclinic, C 2/c
a = 11.824 (2) Å
b = 10.784 (2) Å
c = 22.828 (5) Å
= 91.10 (3)°
V = 2910.1 (10) Å³
Z = 4
Mo K radiation
= 1.86 mm^-1
T = 293 (2) K
0.17 × 0.16 × 0.12 mm

Data collection

Rigaku R-AXIS RAPID-S diffractometer
Absorption correction: none
14677 measured reflections
3337 independent reflections
2840 reflections with I > 2(I)
R_int = 0.035

Refinement

R[F² > 2(F²)] = 0.033
wR(F²) = 0.060
S = 1.14
3337 reflections
190 parameters
H-atom parameters constrained
_max = 0.29 e Å^-3
_min = -0.34 e Å^-3

Table 1
Selected geometric parameters (Å, °)

Cd1-N4	2.305 (2)
Cd1-N1	2.338 (2)
Cd1-Cl2	2.4602 (8)
Cd1-Cl1	2.5725 (10)
Cd1-Cl1ⁱ	2.5903 (10)

N4-Cd1-Cl2	118.63 (6)
N4-Cd1-Cl1	144.04 (6)
Cl2-Cd1-Cl1	96.65 (3)
N1-Cd1-Cl1ⁱ	154.49 (6)
Symmetry code: (i) -x+2, -y+2, -z+1.

Table 2
Hydrogen-bond geometry (Å, °)

D-HA	D-H	HA	DA	D-HA
N3-H16Cl2ⁱⁱ	0.86	2.39	3.221 (2)	163
Symmetry code: (ii) $[x-{\script{1\over 2}}, y-{\script{1\over 2}}, z]$ .

Data collection: RAPID-AUTO (Rigaku, 1998); cell refinement: RAPID-AUTO; data reduction: CrystalStructure (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: SHELXTL.

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: BH2211 ).

Acknowledgements

The author thanks Chifeng University for supporting this work.

References

Fieselmann, B. F., Hendrickson, D. N. & Stucky, G. D. (1978). Inorg. Chem. 17, 2074-2077.
Meng, X. R., Song, Y. L., Hou, H. W., Han, H. Y., Xiao, B., Fan, Y. T. & Zhu, Y. (2004). Inorg. Chem. 43, 3528-3536.
Rigaku (1998). RAPID-AUTO. Rigaku Corporation, Tokyo, Japan.
Rigaku/MSC (2002). CrystalStructure. Rigaku/MSC Inc., The Woodlands, Texas, USA.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.

metal-organic compounds