Abstract
The silyl-substituted 1,4-disila(Dewar benzene) (1) was synthesized by the reduction of the corresponding dichloride 2 with 2.2 equiv of KC8 in THF. The irradiation of 1 with light of wavelength λ > 320 nm in THF under a CO atmosphere produced the cyclic disilyl ketone 3 by the insertion of CO into the central Si−Si bond, whereas the photolysis of 1 in cyclohexane-d12 afforded the silyl-substituted 2,5-disilabenzvalene 4 by intramolecular isomerization.
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