Bis{N-[(diethyl­amino)­dimethyl­sil­yl]anilinido-κ2N,N′}nickel(II)

Chen, J.; Li, J.

doi:10.1107/S1600536812008550

Volume 68
Part 4
Page m357
April 2012

Received 22 February 2012
Accepted 26 February 2012
Online 3 March 2012

Key indicators
Single-crystal X-ray study
T = 295 K
Mean (C-C) = 0.006 Å
R = 0.040
wR = 0.104
Data-to-parameter ratio = 17.1
Details

Bis{N-[(diethylamino)dimethylsilyl]anilinido-²N,N'}nickel(II)

Juan Chen ^a ^* and Jing Li ^b

^aDepartment of Chemistry, Taiyuan Teachers College, Taiyuan 030031, People's Republic of China, and ^bCollege of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, People's Republic of China
Correspondence e-mail: sdbai@sxu.edu.cn

The mononuclear Ni^II amide, [Ni(C₁₂H₂₁N₂Si)₂], has the Ni^II atom N,N'-chelated by the N-silylated anilinide ligands. The ligands are arranged cis to each other and obey the C₂-symmetry operation. The two ends of the N-Si-N chelating unit exhibit different affinities for the metal atom: the Ni-N_anilinide bond length is 1.913 (3) Å and Ni-N_amine is 2.187 (3) Å. The four-coordinate Ni^II ion demonstrates a distorted tetrahedral geometry.

Related literature

For related reviews of metal amides, see: Holm et al. (1996); Kempe (2000). For the catalytic applications of related N-silylated anilinide group 4 metal compounds towards olefin polymerization, see: Gibson et al. (1998); Hill & Hitchcock (2002); Yuan et al. (2010); Zai et al. (2010). For related organometallic compounds with analogous anilinide ligands, see: Schumann et al. (2000); Chen (2008, 2009).

Experimental

Crystal data

[Ni(C₁₂H₂₁N₂Si)₂]
M_r = 501.49
Orthorhombic, F d d 2
a = 21.2631 (11) Å
b = 30.0347 (16) Å
c = 8.6228 (5) Å
V = 5506.8 (5) Å³
Z = 8
Mo K radiation
= 0.81 mm^-1
T = 295 K
0.25 × 0.20 × 0.20 mm

Data collection

Bruker SMART CCD diffractometer
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) T_min = 0.823, T_max = 0.855
6217 measured reflections
2414 independent reflections
2145 reflections with I > 2(I)
R_int = 0.029

Refinement

R[F² > 2(F²)] = 0.040
wR(F²) = 0.104
S = 1.04
2414 reflections
141 parameters
1 restraint
H-atom parameters constrained
_max = 0.48 e Å^-3
_min = -0.20 e Å^-3
Absolute structure: Flack (1983), 1038 Friedel pairs
Flack parameter: 0.012 (17)

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 (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: RK2340 ).

Acknowledgements

This work was performed under the sponsorship of the Natural Science Foundation of China (20702029) and the Natural Science Foundation of Shanxi Province (2008011024).

References

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