organic compounds
In the title compound, C19H30Si, the double bonds are essentially localized. The central ring and its substituents, including the triple-bond system, are coplanar, with the Si atom lying 0.148 (2) Å out of the plane. The packing involves herring-bone layers parallel to the ab plane.
organic compounds
In the title compound, C30H18, the fluorene moiety displays normal dimensions, such as a narrow ring angle of 105.3 (3)° at the 9-position, the atom bearing the exocyclic double bond. The phenyl rings subtend angles of 14.8 (2) and 3.9 (2)° to the fluorene plane. Molecules are stacked parallel to the short c axis of 4.001 (1) Å.
organic compounds
In the title compound, 2C30H18·3C12H4N4, the asymmetric unit consists of half a formula unit (one quinodimethane molecule displays inversion symmetry). There is no ring stacking; instead, the residues associate by weak C—HN contacts in planes parallel to (2).