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Volume 68 
Part 12 
Page m1468  
December 2012  

Received 19 October 2012
Accepted 31 October 2012
Online 10 November 2012

Key indicators
Single-crystal X-ray study
T = 123 K
Mean [sigma](C-C) = 0.001 Å
R = 0.023
wR = 0.067
Data-to-parameter ratio = 25.5
Details
Open access

catena-Poly[sodium-[mu]2-(N,N,N',N'-tetramethylethane-1,2-diamine)-[kappa]2N:N'-sodium-bis[[mu]2-bis(trimethylsilyl)azanido-[kappa]2N:N]]

aWestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland
Correspondence e-mail: stuart.d.robertson@strath.ac.uk

The title compound, [Na2(C6H18NSi2)2(C6H16N2)]n, was found to consist of dimeric [Na(NSiMe3)2] units with crystallographically imposed centrosymmetry based upon four-membered NaNNaN rings. The dimers are bridged by N,N,N',N'-tetramethylethylenediamine ligands, which act in an unusual extended non-chelating coordination mode. This gives a one-dimensional coordination polymer that extends parallel to the a-axis direction.

Related literature

For structures of non-solvated [Na(NSiMe3)2], see: Grüning & Atwood (1977[Grüning, R. & Atwood, J. L. (1977). J. Organomet. Chem. 137, 101-111.]); Driess et al. (1997[Driess, M., Pritzkow, H., Skipinski, M. & Winkler, U. (1997). Organometallics, 16, 5108-5112.]); Knizek et al. (1997[Knizek, J., Krossing, I., Nöth, H., Schwenk, H. & Seifert, T. (1997). Chem. Ber. 130, 1053-1062.]) and for THF-solvated [Na(NSiMe3)2], see: Sarazin et al. (2006[Sarazin, Y., Coles, S. J., Hughes, D. L., Hursthouse, M. B. & Bochmann, M. (2006). Eur. J. Inorg. Chem. pp. 3211-3220.]); Karl et al. (1999[Karl, M., Seybert, G., Massa, W., Harms, K., Agarwal, S., Maleika, R., Stelter, W., Greiner, A., Heitz, W., Neumüller, B. & Dehnicke, K. (1999). Z. Anorg. Allg. Chem. 625, 1301-1309.]). For similar complexes with diamine bridges between metal atoms, see: Henderson et al. (1997[Henderson, K. W., Dorigo, A. E., Liu, Q.-Y. & Williard, P. G. (1997). J. Am. Chem. Soc. 119, 11855-11863.]); Bernstein et al. (1992[Bernstein, M. P., Romesberg, F. E., Fuller, D. J., Harrison, A. T., Collum, D. B., Liu, Q.-Y. & Williard, P. G. (1992). J. Am. Chem. Soc. 114, 5100-5110.]).

[Scheme 1]

Experimental

Crystal data
  • [Na2(C6H18NSi2)2(C6H16N2)]

  • Mr = 482.98

  • Monoclinic, P 21 /n

  • a = 9.9761 (12) Å

  • b = 13.8292 (12) Å

  • c = 11.7983 (14) Å

  • [beta] = 113.523 (14)°

  • V = 1492.4 (3) Å3

  • Z = 2

  • Mo K[alpha] radiation

  • [mu] = 0.24 mm-1

  • T = 123 K

  • 0.20 × 0.14 × 0.10 mm

Data collection
  • Oxford Diffraction Gemini S diffractometer

  • Absorption correction: multi-scan (CrysAlis PRO; Oxford Diffraction, 2009[Oxford Diffraction (2010). CrysAlis PRO. Oxford Diffraction Ltd, Abingdon, England.]) Tmin = 0.942, Tmax = 1.000

  • 8332 measured reflections

  • 3436 independent reflections

  • 3064 reflections with I > 2[sigma](I)

  • Rint = 0.012

Refinement
  • R[F2 > 2[sigma](F2)] = 0.023

  • wR(F2) = 0.067

  • S = 1.07

  • 3436 reflections

  • 135 parameters

  • H-atom parameters constrained

  • [Delta][rho]max = 0.37 e Å-3

  • [Delta][rho]min = -0.18 e Å-3

Data collection: CrysAlis PRO (Oxford Diffraction, 2010)[Oxford Diffraction (2010). CrysAlis PRO. Oxford Diffraction Ltd, Abingdon, England.]; cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; 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: DIAMOND (Brandenburg, 1999[Brandenburg, K. (1999). DIAMOND. Crystal Impact GbR, Bonn, Germany.]); software used to prepare material for publication: SHELXL97.


Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: PK2451 ).


Acknowledgements

We gratefully acknowledge the UK Engineering and Physical Sciences Research Council (award No. EP/F063733/1 to REM) and for the award of a Career Acceleration Fellowship (award no EP/J001872/1) to CTOH, the Royal Society for a Wolfson research merit award to REM, the Royal Society of Edinburgh/BP Trust for the award of a Research fellowship to SDR and a University of Strathclyde RDF award to REM/SDR.

References

Bernstein, M. P., Romesberg, F. E., Fuller, D. J., Harrison, A. T., Collum, D. B., Liu, Q.-Y. & Williard, P. G. (1992). J. Am. Chem. Soc. 114, 5100-5110.  [CrossRef] [ChemPort] [ISI]
Brandenburg, K. (1999). DIAMOND. Crystal Impact GbR, Bonn, Germany.
Driess, M., Pritzkow, H., Skipinski, M. & Winkler, U. (1997). Organometallics, 16, 5108-5112.  [CrossRef] [ChemPort]
Grüning, R. & Atwood, J. L. (1977). J. Organomet. Chem. 137, 101-111.
Henderson, K. W., Dorigo, A. E., Liu, Q.-Y. & Williard, P. G. (1997). J. Am. Chem. Soc. 119, 11855-11863.  [CrossRef] [ChemPort] [ISI]
Karl, M., Seybert, G., Massa, W., Harms, K., Agarwal, S., Maleika, R., Stelter, W., Greiner, A., Heitz, W., Neumüller, B. & Dehnicke, K. (1999). Z. Anorg. Allg. Chem. 625, 1301-1309.  [CrossRef] [ChemPort]
Knizek, J., Krossing, I., Nöth, H., Schwenk, H. & Seifert, T. (1997). Chem. Ber. 130, 1053-1062.  [CrossRef] [ChemPort]
Oxford Diffraction (2010). CrysAlis PRO. Oxford Diffraction Ltd, Abingdon, England.
Sarazin, Y., Coles, S. J., Hughes, D. L., Hursthouse, M. B. & Bochmann, M. (2006). Eur. J. Inorg. Chem. pp. 3211-3220.  [ISI] [CSD] [CrossRef]
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.  [CrossRef] [details]


Acta Cryst (2012). E68, m1468  [ doi:10.1107/S1600536812045126 ]

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