Methylcyclopropane is an organic compound with the structural formula C3H5CH3. This colorless gas is the monomethyl derivative of cyclopropane. Reactions Methylcyclopropane, like many other cyclopropanes, undergoes ring-opening reactions. Bond cleavage in certain reactions is also reported in conjunction with the use of methylenecyclopropane groups as protective groups for amines. References Cyclopropyl compounds Hydrocarbons