Abstract Tetrachlorodiborane (4) reacts with cyclopropane, methylcyclopropane and dimethylcyclopropanes to give ring cleavage addition compounds. IR and NMR data support structures with dichloroboryl groups in the 1, 3 position of the hydrocarbon chain. Some evidence is presented to support a stereospecific reaction which involves a 4-centered transition state comparable to that which has been postulated for subchloride addition to ...
