Received 11 July 2008
In the title molecule, C41H64B2O4, the fluorene unit is essentially planar and the two octyl chains attached to the central C atom inhibit the molecule from engaging in intermolecular aromatic interactions. One of the octyl chains adopts a fully extended conformation, whereas the second incorporates a single gauche conformation. Of the two pinacolatoboronate groups attached at the 2,7-positions, one is partly disordered; one ring C atom and all four methyl groups are disordered equally over two positions.
Data collection: APEX2 (Bruker, 2006); cell refinement: SAINT (Bruker, 2006); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008) and Materials Studio (Accelrys, 2005); software used to prepare material for publication: UdMX (Maris, 2004).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: LH2661 ).
The authors acknowledge financial support from the Natural Sciences and Engineering Research Council of Canada and the Canada Foundation for Innovation. Dr Thierry Maris and Professor James D. Wuest are gratefully acknowledged for their help in preparing the manuscript. EG also thanks the Natural Sciences and Engineering Research Council of Canada and the Université de Montréal for graduate scholarships.
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