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Volume 68 
Part 12 
Page m1474  
December 2012  

Received 28 October 2012
Accepted 6 November 2012
Online 14 November 2012

Key indicators
Single-crystal X-ray study
T = 295 K
Mean [sigma](C-C) = 0.007 Å
R = 0.062
wR = 0.195
Data-to-parameter ratio = 19.1
Details
Open access

Bis[[mu]-N-(tert-butyldimethylsilyl)quinolin-8-aminato-1:2[kappa]2N1,N8:N8](N,N,N',N'-tetramethylethane-1,2-diamine-1[kappa]2N,N')lithiumsodium

aDepartment of Chemistry, Taiyuan Teachers College, Taiyuan 030031, People's Republic of China, and bTechnical Center of Shanxi Entry-Exit Inspection and Quarantine Bureau, No. 8 Yifen Strteet, Taiyuan 030024, People's Republic of China
Correspondence e-mail: sdbai@sxu.edu.cn

In the heterometallic title bulky amido complex, [LiNa(C15H21N2Si)2(C6H16N2)], both alkali metal ions are four-coordinated with distorted tetrahedral geometries. The Li+ ion is N,N'-chelated by the N-silylated amido ligand, with Li-N = 2.015 (5) and 2.074 (5) Å. The two amido ligands are arranged cis to each other. The molecule exhibits a twofold rotational symmetry operation along the Li-Na axis. The Na+ ion is coordinated by two N atoms from the tetramethylethylenediamine ligand [Na-N = 2.553 (4) Å] and shares two amido N atoms from the N-silylated amido ligands with the Li+ ion. Although the crystal structure contains voids with an approximate volume of 50 Å3 there is no inclusion of solvent molecules.

Related literature

For related metal complexes with N-silylated quinolyl amido ligands, see: Engelhardt et al. (1988[Engelhardt, L. M., Jacobsen, G. E., Junk, P. C., Raston, C. L., Skelton, B. W. & White, A. H. (1988). J. Chem. Soc. Dalton Trans. pp. 1011-1020.], 1990[Engelhardt, L. M., Jacobsen, G. E., Junk, P. C., Raston, C. L. & White, A. H. (1990). Chem. Commun. pp. 89-90.], 1991[Engelhardt, L. M., Junk, P. C., Patalinghug, W. C., Sue, R. E., Raston, C. L., Skelton, B. W. & White, A. H. (1991). Chem. Commun. pp. 930-931.]). For silyl-bridged aminoquinoline derivatives, see: Jones et al. (2000[Jones, C., Junk, P. C. & Smithies, N. A. (2000). J. Organomet. Chem. 607, 105-111.]). For mixed alkali metal systems as superbase reagents, see: Forbes et al. (2003[Forbes, G. C., Kenley, F. R., Kennedy, A. R., Mulvey, R. E. & O'Hara, C. T. (2003). Chem. Commun. pp. 1140-1141.]); Mulvey (2006[Mulvey, R. E. (2006). Organometallics, 25, 1060-1075.]); Wei et al. (2008[Wei, X. H., Dong, Q. C., Tong, H. B., Chao, J. B., Liu, D. S. & Lappert, M. F. (2008). Angew. Chem. Int. Ed. 47, 3976-3978.]).

[Scheme 1]

Experimental

Crystal data
  • [LiNa(C15H21N2Si)2(C6H16N2)]

  • Mr = 660.99

  • Monoclinic, C 2/c

  • a = 12.653 (2) Å

  • b = 18.542 (3) Å

  • c = 18.296 (3) Å

  • [beta] = 108.794 (3)°

  • V = 4063.6 (11) Å3

  • Z = 4

  • Mo K[alpha] radiation

  • [mu] = 0.13 mm-1

  • T = 295 K

  • 0.30 × 0.25 × 0.20 mm

Data collection
  • Bruker SMART CCD diffractometer

  • Absorption correction: multi-scan (SADABS; Sheldrick, 1996[Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany.]) Tmin = 0.962, Tmax = 0.975

  • 11843 measured reflections

  • 4001 independent reflections

  • 2128 reflections with I > 2[sigma](I)

  • Rint = 0.071

Refinement
  • R[F2 > 2[sigma](F2)] = 0.062

  • wR(F2) = 0.195

  • S = 0.97

  • 4001 reflections

  • 209 parameters

  • 1 restraint

  • H-atom parameters constrained

  • [Delta][rho]max = 0.32 e Å-3

  • [Delta][rho]min = -0.26 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 (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: RK2385 ).


Acknowledgements

This work was supported by grants from 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.
Engelhardt, L. M., Jacobsen, G. E., Junk, P. C., Raston, C. L., Skelton, B. W. & White, A. H. (1988). J. Chem. Soc. Dalton Trans. pp. 1011-1020.  [CrossRef]
Engelhardt, L. M., Jacobsen, G. E., Junk, P. C., Raston, C. L. & White, A. H. (1990). Chem. Commun. pp. 89-90.
Engelhardt, L. M., Junk, P. C., Patalinghug, W. C., Sue, R. E., Raston, C. L., Skelton, B. W. & White, A. H. (1991). Chem. Commun. pp. 930-931.
Forbes, G. C., Kenley, F. R., Kennedy, A. R., Mulvey, R. E. & O'Hara, C. T. (2003). Chem. Commun. pp. 1140-1141.  [CSD] [CrossRef]
Jones, C., Junk, P. C. & Smithies, N. A. (2000). J. Organomet. Chem. 607, 105-111.  [CSD] [CrossRef] [ChemPort]
Mulvey, R. E. (2006). Organometallics, 25, 1060-1075.  [CrossRef] [ChemPort]
Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.  [CrossRef] [details]
Wei, X. H., Dong, Q. C., Tong, H. B., Chao, J. B., Liu, D. S. & Lappert, M. F. (2008). Angew. Chem. Int. Ed. 47, 3976-3978.  [ISI] [CSD] [CrossRef] [ChemPort]


Acta Cryst (2012). E68, m1474  [ doi:10.1107/S160053681204576X ]

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