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Volume 67 
Part 4 
Page m422  
April 2011  

Received 18 February 2011
Accepted 7 March 2011
Online 12 March 2011

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Key indicators
Single-crystal X-ray study
T = 293 K
Mean [sigma](O-C) = 0.002 Å
R = 0.020
wR = 0.046
Data-to-parameter ratio = 16.5
Details
Open access

Polymeric potassium triformatocobalt(II)

Susanne Wöhlert,a* Mario Wriedt,b Inke Jessa and Christian Näthera

aInstitut für Anorganische Chemie, Christian-Albrechts-Universität Kiel, Max-Eyth-Strasse 2, 24118 Kiel, Germany, and bDepartement of Chemistry, Texas A&M University, College Station, Texas 77843, USA
Correspondence e-mail: swoehlert@ac.uni-kiel.de

In the crystal structure of the title compound, poly[tri-[mu]-formato-cobalt(II)potassium], [CoK(CHO2)3]n the Co2+ cations are coordinated by six O-bonded formate anions in an octahedral coordination mode and the K+ cations are eightfold coordinated by seven O-bonded formate anions within irregular polyhedra. The Co2+ cations are connected by bridging formate anions into a three-dimensional coordination network in which the K+ cations are embedded. The asymmetric unit consits of one Co2+ cation located on a center of inversion, one K+ cation located on a twofold axis and two crystallographically independent formato anions, of which one is located on a twofold axis and the other occupies a general position.

Related literature

For background to this work see: Boeckmann et al. (2010)[Boeckmann, J., Wriedt, M. & Näther, C. (2010). Eur. J. Inorg. Chem. pp. 1820-1828.]; Wriedt & Näther (2010[Wriedt, M. & Näther, C. (2010). Z. Anorg. Allg. Chem. 636, 569-575.]); Wriedt et al. (2009)[Wriedt, M., Sellmer, S. & Näther, C. (2009). Inorg. Chem. 48, 6896-6903.]. For structures of bimetallic compounds based on potassium formate, see: Antsyshkina et al. (1983[Antsyshkina, A. S., Porai-Koshits, M. A., Ostrikova, V. N. & Sadikov, G. G. (1983). Koord. Khim. 9, 855-864.]); Leontiev et al. (1988[Leontiev, A. Yu., Arion, M. D., Razdobreev, I. M., Kiosse, G. A., Yablokov, Yu. V., Malinovskii, T. I. & Popvich, G. A. (1988). Dokl. Akad. Nauk SSSR, 300, 1129-1140.]). For a description of the Cambridge Structural Database, see: Allen (2002[Allen, F. H. (2002). Acta Cryst. B58, 380-388.]).

[Scheme 1]

Experimental

Crystal data

  • [CoK(CHO2)3]

  • Mr = 233.08

  • Monoclinic, C 2/c

  • a = 10.7244 (8) Å

  • b = 8.9653 (6) Å

  • c = 6.8742 (5) Å

  • [beta] = 95.539 (6)°

  • V = 657.85 (8) Å3

  • Z = 4

  • Mo K[alpha] radiation

  • [mu] = 3.22 mm-1

  • T = 293 K

  • 0.16 × 0.09 × 0.06 mm
Data collection

  • Stoe IPDS-2 diffractometer

  • Absorption correction: numerical (X-SHAPE and X-RED32; Stoe & Cie, 2008)[Stoe & Cie (2008). X-AREA, X-RED32 and X-SHAPE. Stoe & Cie, Darmstadt, Germany.] Tmin = 0.711, Tmax = 0.817

  • 6120 measured reflections

  • 892 independent reflections

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

  • Rint = 0.031
Refinement

  • R[F2 > 2[sigma](F2)] = 0.020

  • wR(F2) = 0.046

  • S = 1.15

  • 892 reflections

  • 54 parameters

  • H-atom parameters constrained

  • [Delta][rho]max = 0.25 e Å-3

  • [Delta][rho]min = -0.57 e Å-3

Table 1
Selected bond lengths (Å)

K1-O1 2.7371 (10)
K1-O2i 2.8193 (10)
K1-O11i 2.8507 (11)
Co1-O1 2.0943 (10)
Co1-O2ii 2.1015 (10)
Co1-O11iii 2.1026 (9)
Symmetry codes: (i) [x-{\script{1\over 2}}, y-{\script{1\over 2}}, z]; (ii) [x, -y+1, z-{\script{1\over 2}}]; (iii) [-x+{\script{1\over 2}}, -y+{\script{1\over 2}}, -z].

Data collection: X-AREA (Stoe & Cie, 2008)[Stoe & Cie (2008). X-AREA, X-RED32 and X-SHAPE. Stoe & Cie, Darmstadt, Germany.]; cell refinement: X-AREA[Stoe & Cie (2008). X-AREA, X-RED32 and X-SHAPE. Stoe & Cie, Darmstadt, Germany.]; data reduction: X-AREA[Stoe & Cie (2008). X-AREA, X-RED32 and X-SHAPE. Stoe & Cie, Darmstadt, Germany.]; 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: XCIF in SHELXTL.

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: KJ2172 ).

Acknowledgements

We gratefully acknowledge financial support by the DFG (project number NA 720/3-1) and the State of Schleswig-Holstein. We thank Professor Dr Bensch for access to his experimental facility.

References

Allen, F. H. (2002). Acta Cryst. B58, 380-388.  [ISI] [CrossRef] [details]
Antsyshkina, A. S., Porai-Koshits, M. A., Ostrikova, V. N. & Sadikov, G. G. (1983). Koord. Khim. 9, 855-864.  [ChemPort]
Boeckmann, J., Wriedt, M. & Näther, C. (2010). Eur. J. Inorg. Chem. pp. 1820-1828.
Brandenburg, K. (1999). DIAMOND. Crystal Impact GbR, Bonn, Germany.
Leontiev, A. Yu., Arion, M. D., Razdobreev, I. M., Kiosse, G. A., Yablokov, Yu. V., Malinovskii, T. I. & Popvich, G. A. (1988). Dokl. Akad. Nauk SSSR, 300, 1129-1140.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.  [CrossRef] [details]
Stoe & Cie (2008). X-AREA, X-RED32 and X-SHAPE. Stoe & Cie, Darmstadt, Germany.
Wriedt, M. & Näther, C. (2010). Z. Anorg. Allg. Chem. 636, 569-575.  [ChemPort]
Wriedt, M., Sellmer, S. & Näther, C. (2009). Inorg. Chem. 48, 6896-6903.  [ISI] [ChemPort] [PubMed]

Acta Cryst (2011). E67, m422  [ doi:10.1107/S1600536811008737 ]

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