Bis[μ-N-(diethyl­amino-κN)dimethyl­silylanilido-κ2N:N]bis­[chlorido­cobalt(II)]

Chen, J.

doi:10.1107/S1600536811054602

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 (C-C) = 0.013 Å
R = 0.072
wR = 0.227
Data-to-parameter ratio = 18.7
Details

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

Juan Chen ^a ^*

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

In the title binuclear Co^II 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 Co^II atom in an N,N'-chelating mode and provides the anilide N atom as a bridge to link two Co^II atoms. The two ends of the N-Si-N chelating unit exhibit different affinities for the metal atom. The Co-N_anilide bond is 2.031 (6) Å and Co-N_amino 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); Kempe (2000). For catalytic applications of related N-silylated analido group 4 metal compounds towards olefin polymerization, see: Gibson et al. (1998); Hill & Hitchcock (2002); Yuan et al. (2010). For related organometallic compounds supported by analogous analido ligands, see: Schumann et al. (2000); Chen (2008, 2009). For related cobalt amides, see: Murray & Power (1984); Hope et al. (1985).

Experimental

Crystal data

[Co₂(C₁₂H₂₁N₂Si)₂Cl₂]
M_r = 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 radiation
= 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) T_min = 0.773, T_max = 0.876
16361 measured reflections
2885 independent reflections
1795 reflections with I > 2(I)
R_int = 0.093

Refinement

R[F² > 2(F²)] = 0.072
wR(F²) = 0.227
S = 1.17
2885 reflections
154 parameters
48 restraints
H-atom parameters constrained
_max = 1.97 e Å^-3
_min = -0.51 e Å^-3

Data collection: SMART (Bruker, 2000); cell refinement: SAINT (Bruker, 2000); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL/PC (Sheldrick, 2008); 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

Bruker (2000). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.
Chen, J. (2008). Acta Cryst. E64, m938.
Chen, J. (2009). Acta Cryst. E65, m1307.
Gibson, V. C., Kimberley, B. S., White, A. J. P., Williams, D. J. & Howard, P. (1998). Chem. Commun. pp. 313-314.
Hill, M. S. & Hitchcock, P. B. (2002). Organometallics, 21, 3258-3262.
Holm, R. H., Kenneppohl, P. & Solomon, E. I. (1996). Chem. Rev. 96, 2239-2314.
Hope, H., Olmstead, M. M., Murray, B. D. & Power, P. P. (1985). J. Am. Chem. Soc. 107, 712-713.
Kempe, R. (2000). Angew. Chem. Int. Ed. 39, 468-493.
Murray, B. D. & Power, P. P. (1984). Inorg. Chem. 23, 4584-4588.
Schumann, H., Gottfriedsen, J., Dechert, S. & Girgsdies, F. (2000). Z. Anorg. Allg. Chem. 626, 747-758.
Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Yuan, S. F., Wei, X. H., Tong, H. B., Zhang, L. P., Liu, D. S. & Sun, W. H. (2010). Organometallics, 29, 2085-2092.