Acetylene → 1,1,3,3-Tetrachloro-1,3-disilacyclopent-4-ene

Participants

Reaction Steps

Hydrosilation of acetylene with bis(dichlorosilyl)methane in the presence of H2PtCl6 /PPh3. Into the same apparatus as described in Example 1 were placed 235 μl of 0.1 M H2PtCl6 /IPA, the flask was purged with dry nitrogen and the IPA removed under vacuum. Into the flask were added 10 g of bis(dichlorosilyl)methane, 235 μl of 0.1 M PPh3 /benzene solution, and 20 ml of dried benzene. Acetylene gas was blown into the flask content at a rate of 90 ml/min for 10 hours. The products were vacuum distilled at 67 Pa to yield a mixture comprising 8.35 g of 1,1,3,3-tetrachloro-1,3-disilacyclopent-4-ene (TCD-GC area 22.4%); 1,1,3,3-tetrachloro-1,3-disilacyclopentane (TCD-GC area 27.4%), and 1,1,3,3,6,6,8,8-octachloro-1,3,6,8-tetrasilaoctane (TCD-GC area 22.9%).

Provenance & Evidence