Dissociative recombination reactions of a number of cyclic ions, derived from ion-molecule reactions involving acetylene as parent molecule and of protonated butane derived from reactions involving ethylene have been studied. It is found that the recombination rate coefficient does not seem to be much affected by the substitution of functional groups for hydrogen atoms in the cyclic cases. Also, protonated butane has a rate coefficient very similar to that for protonated methane.