1,1,3,3-Tetra-tert-butyl-2,2-diisopropyl-4,4-diphenyl-cyclo-tetra-silane.

The molecule in the structure of the title compound, C34H60Si4, lies on a twofold rotation axis that passes through the two Si atoms, resulting in a planar cyclo-tetra-silane ring. The dihedral angle between the cyclo-tetra-silane ring and the phenyl ring is 68.20 (5)°.