organic compounds
In the title compound, C22H34Si2, the two independent molecules are closely similar. The reduced rings show a flattened twist conformation. Several features of [2.2]paracyclophane strain (e.g. lengthened bridge bonds) are apparent; an exception is furnished by the normal sp2 values of the angles at the bridgehead atoms of the reduced rings.
organic compounds
The title compound, C28H52Si4, crystallizes in the uncommon space group I4122 with 222 symmetry. Despite the reduction of the rings, several features of [2.2]paracyclophane strain are still apparent.