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Volume 68 
Part 1 
Page m81  
January 2012  

Received 26 November 2011
Accepted 19 December 2011
Online 23 December 2011

Key indicators
Single-crystal X-ray study
T = 293 K
Mean [sigma](C-C) = 0.013 Å
R = 0.072
wR = 0.227
Data-to-parameter ratio = 18.7
Details
Open access

Bis[[mu]-N-(diethylamino-[kappa]N)dimethylsilylanilido-[kappa]2N:N]bis[chloridocobalt(II)]

aDepartment of Chemistry, Taiyuan Teachers College, Taiyuan 030031, People's Republic of China
Correspondence e-mail: sdbai@sxu.edu.cn

In the title binuclear CoII complex, [Co2(C12H21N2Si)2Cl2], an inversion center is located at the mid-point between the two Co atoms in the dimeric molecule. The bidentate N-silylated anilide ligand coordinates the CoII atom in an N,N'-chelating mode and provides the anilide N atom as a bridge to link two CoII atoms. The two ends of the N-Si-N chelating unit exhibit different affinities for the metal atom. The Co-Nanilide bond is 2.031 (6) Å and Co-Namino bond is 2.214 (6) Å. The four-coordinate Co atom presents a distorted tetrahedral geometry, while the dimeric aggregation exhibits a (CoN)2 rhombus core with 1.998 (6) Å as the shortest sides and shows a ladder structure composed of Co, N and Si atoms.

Related literature

For related reviews of metal amides, see: Holm et al. (1996[Holm, R. H., Kenneppohl, P. & Solomon, E. I. (1996). Chem. Rev. 96, 2239-2314.]); Kempe (2000[Kempe, R. (2000). Angew. Chem. Int. Ed. 39, 468-493.]). For catalytic applications of related N-silylated analido group 4 metal compounds towards olefin polymerization, see: Gibson et al. (1998[Gibson, V. C., Kimberley, B. S., White, A. J. P., Williams, D. J. & Howard, P. (1998). Chem. Commun. pp. 313-314.]); Hill & Hitchcock (2002[Hill, M. S. & Hitchcock, P. B. (2002). Organometallics, 21, 3258-3262.]); Yuan et al. (2010[Yuan, S. F., Wei, X. H., Tong, H. B., Zhang, L. P., Liu, D. S. & Sun, W. H. (2010). Organometallics, 29, 2085-2092.]). For related organometallic compounds supported by analogous analido ligands, see: Schumann et al. (2000[Schumann, H., Gottfriedsen, J., Dechert, S. & Girgsdies, F. (2000). Z. Anorg. Allg. Chem. 626, 747-758.]); Chen (2008[Chen, J. (2008). Acta Cryst. E64, m938.], 2009[Chen, J. (2009). Acta Cryst. E65, m1307.]). For related cobalt amides, see: Murray & Power (1984[Murray, B. D. & Power, P. P. (1984). Inorg. Chem. 23, 4584-4588.]); Hope et al. (1985[Hope, H., Olmstead, M. M., Murray, B. D. & Power, P. P. (1985). J. Am. Chem. Soc. 107, 712-713.]).

[Scheme 1]

Experimental

Crystal data
  • [Co2(C12H21N2Si)2Cl2]

  • Mr = 631.56

  • Orthorhombic, P c c n

  • a = 12.180 (1) Å

  • b = 15.6753 (13) Å

  • c = 16.0235 (13) Å

  • V = 3059.3 (4) Å3

  • Z = 4

  • Mo K[alpha] radiation

  • [mu] = 1.36 mm-1

  • T = 293 K

  • 0.20 × 0.15 × 0.10 mm

Data collection
  • Bruker SMART area-detector diffractometer

  • Absorption correction: multi-scan (SADABS; Sheldrick, 1996[Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany.]) Tmin = 0.773, Tmax = 0.876

  • 16361 measured reflections

  • 2885 independent reflections

  • 1795 reflections with I > 2[sigma](I)

  • Rint = 0.093

Refinement
  • R[F2 > 2[sigma](F2)] = 0.072

  • wR(F2) = 0.227

  • S = 1.17

  • 2885 reflections

  • 154 parameters

  • 48 restraints

  • H-atom parameters constrained

  • [Delta][rho]max = 1.97 e Å-3

  • [Delta][rho]min = -0.51 e Å-3

Data collection: SMART (Bruker, 2000[Bruker (2000). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.]); cell refinement: SAINT (Bruker, 2000[Bruker (2000). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.]); data reduction: SAINT; 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: SHELXTL/PC (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); software used to prepare material for publication: SHELXL97.


Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: JJ2112 ).


Acknowledgements

This work was sponsored by the Natural Science Foundation of China (20702029) and the Natural Science Foundation of Shanxi Province (2008011024).

References

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Chen, J. (2008). Acta Cryst. E64, m938.  [CSD] [CrossRef] [details]
Chen, J. (2009). Acta Cryst. E65, m1307.  [CSD] [CrossRef] [details]
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Hope, H., Olmstead, M. M., Murray, B. D. & Power, P. P. (1985). J. Am. Chem. Soc. 107, 712-713.  [CrossRef] [ChemPort]
Kempe, R. (2000). Angew. Chem. Int. Ed. 39, 468-493.  [CrossRef] [ChemPort]
Murray, B. D. & Power, P. P. (1984). Inorg. Chem. 23, 4584-4588.  [CrossRef] [ChemPort]
Schumann, H., Gottfriedsen, J., Dechert, S. & Girgsdies, F. (2000). Z. Anorg. Allg. Chem. 626, 747-758.  [CrossRef] [ChemPort]
Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.  [CrossRef] [details]
Yuan, S. F., Wei, X. H., Tong, H. B., Zhang, L. P., Liu, D. S. & Sun, W. H. (2010). Organometallics, 29, 2085-2092.  [CSD] [CrossRef] [ChemPort]


Acta Cryst (2012). E68, m81  [ doi:10.1107/S1600536811054602 ]

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