Acta Crystallographica Section C

Crystal Structure Communications

Volume 69, Part 4 (April 2013)

organic compounds

Acta Cryst. (2013). C69, 436-438    [ doi:10.1107/S0108270113005659 ]

5,5-Dimethyl-2,8-diphenyl-5H-dibenzo[b,f]silepine: a synchrotron study

W. Clegg, R. W. Harrington, L. G. Mercier and W. E. Piers

Abstract: The mol­ecule of the title silepine compound, C28H24Si, lies on a crystallographic general position but has almost exact mirror symmetry. The seven-membered silepine ring has a boat conformation, with a fold angle of 99.99 (9)° between the C-C=C-C stern and the C-Si-C prow. The planes of the phenyl substituents are rotated by 32.23 (6) and 31.80 (7)° out of the planes of the respective fused benzene rings. Similar folded conformations are found for other dibenzo[b,f]silepines, while analogous dibenzo[b,f]borepines, in which the B atom can participate in conjugation, have a more flattened heterocyclic ring.

Formula: C28H24Si

cdxdisplay filedownload file

Chemdraw file (3.8 kbytes)
[ doi:10.1107/S0108270113005659/ky3030Isup3.cdx ]
Supplementary material

cmldisplay filedownload file

Chemical Markup Language (CML) file (7.9 kbytes)
[ doi:10.1107/S0108270113005659/ky3030Isup4.cml ]
Supplementary material


To open or display or play some files, you may need to set your browser up to use the appropriate software. See the full list of file types for an explanation of the different file types and their related mime types and, where available links to sites from where the appropriate software may be obtained.

The download button will force most browsers to prompt for a file name to store the data on your hard disk.

Where possible, images are represented by thumbnails.

 bibliographic record in  format

  Find reference:   Volume   Page   
  Search:     From   to      Advanced search

Copyright © International Union of Crystallography
IUCr Webmaster