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Volume 69 
Part 12 
Page m672  
December 2013  

Received 28 October 2013
Accepted 2 November 2013
Online 20 November 2013

Key indicators
Single-crystal X-ray study
T = 293 K
Mean [sigma](C-C) = 0.004 Å
R = 0.037
wR = 0.075
Data-to-parameter ratio = 12.6
Details
Open access

Poly[di-[mu]9-citrato-tetra­sodiumzinc]

aAir Force Service College, Xuzhou 221000, People's Republic of China, and bLogistics College, Beijing 100858, People's Republic of China
Correspondence e-mail: myhmayuhong@163.com

In the title compound, [Na4Zn(C6H5O7)2]n, the ZnII ion lies on an inversion center and is coordinated by six O atoms from two citrate ligands, forming a distorted octa­hedral geometry. There are two crystallographically independent Na+ cations in the asymmetric unit. One Na+ cation exhibits a distorted square-pyramidal geometry defined by five O atoms from four citrate ligands. The other Na+ cation is surrounded by six O atoms from five citrate ligands in a distorted octa­hedral geometry. The Na+ cations are bridged by citrate carboxyl­ate groups, forming a layer parallel to (100). The layers are further assembled into a three-dimensional network with the [Zn(citrate)2]4- building units as `pillars'; O-H...O hydrogen bonds also stabilize the structure.

Related literature

For an isotypic compound, see: Liu et al. (2012[Liu, Z., Tian, R., Mao, R., Cao, X. & Wang, F. (2012). Acta Cryst. E68, m679-m680.]).

[Scheme 1]

Experimental

Crystal data
  • [Na4Zn(C6H5O7)2]

  • Mr = 535.55

  • Monoclinic, P 21 /c

  • a = 7.9642 (16) Å

  • b = 12.530 (3) Å

  • c = 8.7090 (17) Å

  • [beta] = 113.66 (3)°

  • V = 796.0 (3) Å3

  • Z = 2

  • Mo K[alpha] radiation

  • [mu] = 1.74 mm-1

  • T = 293 K

  • 0.21 × 0.21 × 0.20 mm

Data collection
  • Rigaku SCXmini CCD diffractometer

  • Absorption correction: multi-scan (ABSCOR; Higashi, 1995[Higashi, T. (1995). ABSCOR. Rigaku Corporation, Tokyo, Japan.]) Tmin = 0.712, Tmax = 0.722

  • 8270 measured reflections

  • 1831 independent reflections

  • 1570 reflections with I > 2[sigma](I)

  • Rint = 0.048

Refinement
  • R[F2 > 2[sigma](F2)] = 0.037

  • wR(F2) = 0.075

  • S = 1.15

  • 1831 reflections

  • 145 parameters

  • H atoms treated by a mixture of independent and constrained refinement

  • [Delta][rho]max = 0.37 e Å-3

  • [Delta][rho]min = -0.47 e Å-3

Table 1
Hydrogen-bond geometry (Å, °)

D-H...A D-H H...A D...A D-H...A
O7-H1...O2i 0.95 (3) 1.69 (3) 2.635 (2) 174 (3)
Symmetry code: (i) -x+1, -y+2, -z+2.

Data collection: CrystalClear (Rigaku, 2005[Rigaku (2005). CrystalClear. Rigaku Corporation, Tokyo, Japan.]); cell refinement: CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); molecular graphics: XP in SHELXTL (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]) and DIAMOND (Brandenburg, 1999[Brandenburg, K. (1999). DIAMOND. Crystal Impact GbR, Bonn, Germany.]); software used to prepare material for publication: SHELXTL.


Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HY2639 ).


Acknowledgements

The authors acknowledge the Air Force Service College for supporting this work.

References

Brandenburg, K. (1999). DIAMOND. Crystal Impact GbR, Bonn, Germany.
Higashi, T. (1995). ABSCOR. Rigaku Corporation, Tokyo, Japan.
Liu, Z., Tian, R., Mao, R., Cao, X. & Wang, F. (2012). Acta Cryst. E68, m679-m680.  [CSD] [CrossRef] [ChemPort] [IUCr Journals]
Rigaku (2005). CrystalClear. Rigaku Corporation, Tokyo, Japan.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.  [CrossRef] [ChemPort] [IUCr Journals]


Acta Cryst (2013). E69, m672  [ doi:10.1107/S1600536813030067 ]

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