Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 6 (June 2013)


organic compounds



pk2470 scheme

Acta Cryst. (2013). E69, o890    [ doi:10.1107/S160053681301218X ]

6,12-Bis[(tricyclohexylsilyl)ethynyl]indeno[1,2-b]fluorene

B. D. Rose, L. N. Zakharov and M. M. Haley

Abstract: The title compound, C60H76Si2, a formally anti-aromatic system containing 20-[pi] electrons, contains a rare p-xylylene motif. This is displayed by the alternating short and long bonds. The outer rings possess nearly homogenous bond lengths. In the crystal, the molecules forms layers perpendicular to the c axis and within these layers there are two one-dimensional stacks with one stack that has a sp2 carbon contact of 3.283 (6) Å, less than the sum of the van der Waals radii. The center of the molecule sits on an inversion center.


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