Bond-coupled electron transfer processes: cleavage of Si-Si bonds in disilanes
Rabih O Al-Kaysi1, Joshua L Goodman
1Department of Chemistry, University of Rochester, Rochester, NY 14627, USA.
Abstract:
Photooxidation of 1,1,2,2-tetra-tert-butyl-1,2-diphenyldisilane, 1, by triplet sensitizers in CHCl3/CCl4 solutions yields chlorosilane, 2, in high chemical yield. The quantum yield for formation of 2 depends on the energy of the ion radical pair formed following initial electron transfer. Dissociative return electron transfer (DRET) is proposed as the mechanism for the highly efficient Si-Si bond cleavage in 1. DRET may be a useful strategy for the fragmentation of other such bonds in di-, oligo-, and polysilanes as well as other group 4A compounds using a variety of sensitizers with different spectral properties.
More Related Videos
Related Concept Videos
Lewis Structures of Molecular Compounds and Polyatomic Ions
Diels–Alder Reaction: Characteristics of Dienes
Characteristics of the diene
Conformation
The simplest example of a diene is 1,3-butadiene, an acyclic conjugated π system. At room temperature, the molecule exists as a mixture of s-cis and s-trans conformers by virtue of rotation around the carbon–carbon single bond. Although the s-trans isomer is more stable, the...
[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement
Stability of Conjugated Dienes
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
The Electrical Double Layer
Imperfections in Crystal Structure: Stoichiometric Point Defects


