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Lookup NU author(s): Emeritus Professor Bill CleggORCiD,
Dr Ross Harrington
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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)degrees between the CC=CC stern and the CSiC prow. The planes of the phenyl substituents are rotated by 32.23(6) and 31.80(7)degrees 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.
Author(s): Clegg W, Harrington RW, Mercier LG, Piers WE
Publication type: Article
Publication status: Published
Journal: Acta Crystallographica Section C; Crystal Structure Communications
Pages: 436-438 [plus 6 pages supplementary materials]
Print publication date: 01/04/2013
ISSN (print): 0108-2701
ISSN (electronic): 2053-2296
Publisher: Wiley-Blackwell Publishing, Inc.
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