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Volume 67 
Part 5 
Page o1233  
May 2011  

Received 11 April 2011
Accepted 20 April 2011
Online 29 April 2011

[lh5233sup1]
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Key indicators
Single-crystal X-ray study
T = 173 K
Mean [sigma](C-C) = 0.003 Å
R = 0.052
wR = 0.120
Data-to-parameter ratio = 19.1
Details
Open access

1,1,3,3,5,5,7,7-Octaphenyl-2,6-dioxa-4,8-diaza-1,3,5,7-tetrasilacyclooctane

Zhen Lv,a Lina Dai,a Xuezhong Zhang,a Zhijie Zhanga* and Zemin Xiea

aInstitute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
Correspondence e-mail: zhangzj@iccas.ac.cn

The title molecule, C48H42N2O2Si4, lies on a twofold rotation axis. The eight-membered ring has a slightly distorted boat conformation.

Related literature

For the hydrolysis of 1,3-bis-(hydroxydiphenylsilanyl)-2,2,4,4-tetraphenylcyclodisilazane, see: Voronkov et al. (1977[Voronkov, M. G., Varezhkin, Yu. M., Zhinkin, D. Ya., Morgunova, M. M., Gurkova, S. N., Gusev, A. I. & Alekseev, N. V. (1977). Dokl. Akad. Nauk SSSR, 237, 102-104.]).

[Scheme 1]

Experimental

Crystal data

  • C48H42N2O2Si4

  • Mr = 791.20

  • Monoclinic, C 2/c

  • a = 12.1188 (18) Å

  • b = 17.016 (3) Å

  • c = 20.621 (3) Å

  • [beta] = 93.216 (3)°

  • V = 4245.8 (11) Å3

  • Z = 4

  • Mo K[alpha] radiation

  • [mu] = 0.18 mm-1

  • T = 173 K

  • 0.35 × 0.35 × 0.05 mm
Data collection

  • Rigaku MM007-HF CCD (Saturn 724+) diffractometer

  • Absorption correction: multi-scan (CrystalClear; Rigaku, 2007[Rigaku (2007). CrystalClear. Rigaku Corporation, Tokyo, Japan.]) Tmin = 0.939, Tmax = 0.991

  • 14029 measured reflections

  • 4833 independent reflections

  • 4411 reflections with I > 2[sigma](I)

  • Rint = 0.039
Refinement

  • R[F2 > 2[sigma](F2)] = 0.052

  • wR(F2) = 0.120

  • S = 1.10

  • 4833 reflections

  • 253 parameters

  • H-atom parameters constrained

  • [Delta][rho]max = 0.39 e Å-3

  • [Delta][rho]min = -0.30 e Å-3

Data collection: CrystalClear (Rigaku, 2007[Rigaku (2007). CrystalClear. Rigaku Corporation, Tokyo, Japan.]); cell refinement: CrystalClear; data reduction: CrystalClear; 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: LH5233 ).

Acknowledgements

The authors would like to thank the National Natural Science Foundation of China (grant No. 50803070) for financial support.

References

Rigaku (2007). CrystalClear. Rigaku Corporation, Tokyo, Japan.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.  [CrossRef] [details]
Voronkov, M. G., Varezhkin, Yu. M., Zhinkin, D. Ya., Morgunova, M. M., Gurkova, S. N., Gusev, A. I. & Alekseev, N. V. (1977). Dokl. Akad. Nauk SSSR, 237, 102-104.  [ChemPort]

Acta Cryst (2011). E67, o1233  [ doi:10.1107/S1600536811014851 ]

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