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 Pd(PPh3)4. Into the same apparatus as described in Example 1 were placed 10 g of bis(dichlorosilyl)methane, 0.103 g of Pd(PPh3)4, and 20 ml of dried benzene. Acetylene gas was blown into the flask at 90 ml/min for 3 hours. The products were vacuum distilled at 67 Pa to yield a mixture comprising 8.29 g of 1,1,3,3-tetrachloro-1,3-disilacyclopent-4-ene (TCD-GC area 55.2%); 3,3,5,5-tetrachloro-3,5-disilapent-1-ene (TCD-GC area 12.7%); 1,1,3,3-tetrachloro-1,3-disilacyclopentane (TCD-GC area 5.3%); and 1,1,3,3,6,6,8,8-octachloro-1,3,6,8-tetrasilaoctane (TCD-GC area 0.3%).

Provenance & Evidence