Received 13 March 2009
In the title compound, C21H19BrO2, the dihedral angles between the central benzene ring and the two peripheral rings are 50.28 (5) and 69.75 (2)°. The O-CH2 bonds lie in the plane of the central ring and adopt a syn-anti conformation.
Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT-Plus (Bruker, 2001); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXL97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: XP in SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HG2488 ).
This work was supported by Shandong Province (2007BS02016) and the Key Subject Research Foundation of Shandong Province (XTD 0705).
Bruker (2001). SAINT-Plus. Bruker AXS Inc., Madison, Wisconsin, USA.
Bruker (2004). APEX2. Bruker AXS Inc., Madison, Wisconsin, USA.
Hawker, C. J. & Fréchet, J. M. (1990). J. Am. Chem. Soc. 112, 7638-7647.
Pan, Z.-G., Cheung, E. Y., Harris, K. D. M., Constable, E. C. & Housecroft, C. E. (2005). Cryst. Growth Des. 5, 2084-2090.
Sheldrick, G. M. (2003). SADABS. University of Göttingen, Germany.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Xiao, Z.-P., Fang, R.-Q., Shi, L., Ding, H., Chen, X. & Zhu, H.-L. (2007). Can. J. Chem. 85, 951-957.