Poly[[μ10-4,4′-(ethane-1,2-diyldi­oxy)dibenzoato]dipotassium]

Ma, Z.; Liang, B.; Lu, W.

doi:10.1107/S1600536812008513

Volume 68
Part 4
Page m370
April 2012

Received 10 February 2012
Accepted 25 February 2012
Online 3 March 2012

Key indicators
Single-crystal X-ray study
T = 298 K
Mean (C-C) = 0.002 Å
R = 0.023
wR = 0.067
Data-to-parameter ratio = 19.7
Details

Poly[[₁₀-4,4'-(ethane-1,2-diyldioxy)dibenzoato]dipotassium]

Zhen Ma,^a ^* Baohuan Liang ^a and Wanbing Lu ^a

^aGuangxi Key Laboratory of Petrochemical Resources, Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
Correspondence e-mail: mzmz2009@sohu.com

The title salt, [K₂(C₁₆H₁₂O₆)]_n, was obtained by the reaction of 1,2-bis[4-(ethyl-carboxyl)-phenoxyl]ethane with KOH in water. The anion lies on a crystallographic inversion center, which is located at the mid-point of the central C-C bond. The K⁺ cation is coordinated by six O atoms, two from the chelating carboxylate group of the anion and four from four neighboring and monodentately binding anions, giving rise to an irregular [KO₆] coordination polyhedron. The coordination mode of the cation leads to the formation of K/O layers parallel to (100). These layers are linked by the nearly coplanar anions (r.m.s. deviation of 0.064 Å of the carboxyl, aryl and O-CH₂ groups from the least-squares plane) into a three-dimentional network.

Related literature

For the preparation, structures, properties and applications of metal carboxylate compounds, see: Ma et al. (2005); Su et al. (2010); Zhang & Chen (2008); Zhu et al. (2008). For the preparation of the precusor, see: Ma & Yang (2011). For standard bond lengths, see: Allen et al. (1987).

Experimental

Crystal data

[K₂(C₁₆H₁₂O₆)]
M_r = 189.23
Monoclinic, P 2₁ /c
a = 18.0696 (7) Å
b = 3.9866 (1) Å
c = 11.3189 (5) Å
= 107.188 (2)°
V = 778.96 (5) Å³
Z = 4
Mo K radiation
= 0.64 mm^-1
T = 298 K
0.15 × 0.11 × 0.10 mm

Data collection

Bruker SMART CCD area-detector diffractometer
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) T_min = 0.919, T_max = 0.938
7387 measured reflections
2146 independent reflections
1999 reflections with I > 2(I)
R_int = 0.018

Refinement

R[F² > 2(F²)] = 0.023
wR(F²) = 0.067
S = 1.01
2146 reflections
109 parameters
H-atom parameters constrained
_max = 0.39 e Å^-3
_min = -0.22 e Å^-3

Table 1
Selected bond lengths (Å)

K1-O2ⁱ	2.6558 (8)
K1-O1ⁱⁱ	2.6780 (8)
K1-O2	2.7069 (8)
K1-O1ⁱⁱⁱ	2.7167 (8)
K1-O2^iv	2.8027 (8)
K1-O1	3.0335 (8)
Symmetry codes: (i) $[-x, y+{\script{1\over 2}}, -z-{\script{1\over 2}}]$ ; (ii) -x, -y+2, -z; (iii) -x, -y+1, -z; (iv) $[-x, y-{\script{1\over 2}}, -z-{\script{1\over 2}}]$ .

Data collection: SMART (Bruker, 2001); cell refinement: SAINT (Bruker, 2002); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: publCIF (Westrip, 2010).

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: WM2592 ).

Acknowledgements

The authors are grateful for financial support from the Scientific Fund of Guangxi University (X061144) and the Opening Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology (K008).

References

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