Disilenes silyl migration

Much attention has been focused on possible 1,2-silyl migrations in unsaturated silicon compounds like disilenes, silaethenes and silylenes, especially since their stable derivatives had been isolated. 

Transition states and barrier heights for the silylsilylene (61)-disilene (62) isomerization via 1,2-silyl and 1,2-methyl migrations were investigated by ab initio MO calculations at the 6-31G level (equation 49). The 1,2-silyl migration of disilanylsilylene... 

Under slightly different conditions both disilene extrusion and rearrangement were observed. Evidence was presented that the rearrangement occurred as the result of radical cleavage of a carbon-silicon bond, followed by a 1,2-silyl migration in the resulting allylsilane system87 (equation 54). 

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