Acta Crystallographica Section C

Crystal Structure Communications

Volume 61, Part 5 (May 2005)

organic compounds


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Acta Cryst. (2005). C61, o328-o331    [doi:10.1107/S0108270105009479]

A new polymorph and two inclusion compounds of 9,9'-spirobifluorene

R. E. Douthwaite, A. Taylor and A. C. Whitwood

Abstract: Two new inclusion compounds of 9,9'-spirobifluorene (SBF) incorporating benzene [(I), C25H16·C6H6] and biphenyl [(II), C25H16·C12H10], and a new polymorph of SBF [(III), C25H16] are reported. All three exhibit C-H...[bold pi](arene) hydrogen bonds between adjacent SBF molecules. Compound (II) also contains biphenyl C-H to SBF [bold pi]-arene interactions. Collectively, hydrogen bonding gives rise to a chain and a layered motif in compounds (I) and (II), respectively.

Formula: C25H16·C6H6, C25H16·C12H10 and C25H16

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Structure factor file (CIF format) (241.1 kbytes)
Contains datablock I

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Structure factor file (CIF format) (163.0 kbytes)
Contains datablock II

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Structure factor file (CIF format) (290.1 kbytes)
Contains datablock III

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