%0 Journal Article
%T 1-[Bicyclo[4.2.0]octa-1(6),2,4-trien-3-yl]-3-[bicyclo[4.2.0]octa-1(6),2,4-trien-3-ylmethyl]imidazolium hexafluorophosphate
%A Fang-Hua Zhu
%A Jun-Xiao Yang
%A Zhi-Hua Mao
%A Ru-Gang Xie
%J Acta Crystallographica Section E
%D 2008
%I International Union of Crystallography
%R 10.1107/s1600536807067086
%X In the title compound, C20H19N2+¡¤PF6 , the two benzocyclobutene units are essentially planar and they form dihedral angles of 38.0 (2) and 72.7 (2)¡ã, with the central imidazolium ring. In the crystal structure, weak C¡ªH...¦Ð and ¦Ð-¨C¦Ð stacking interactions [centroid¨Ccentroid distance = 3.742 (2)  ] contribute to the stability of the crystal structure. The PF6  ion is disordered over two positions with site occupancies of 0.869 (9) and 0.131 (9).
%U http://scripts.iucr.org/cgi-bin/paper?S1600536807067086