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The title compound, C 24 H 26 O 2 Si 2 , has  C   2  crystallographic symmetry. The dihedral angle between the aromatic rings is 84.5 (2)°. The acetyl­ene group is slightly non-linear, with angles at the acetyl­ene C atoms of 175.7 (2) and 177.0 (2)°. In the crystal structure, only van de Waals interactions occur.

1,2-Bis{2-[2-(trimethylsilyl)ethynyl]phenyl}ethane-1,2-dione