Substitution-two reactants exchange parts to give two H H These two H一C-H+CI一C Light H一C一CI+H一C ..give these reactants... two products H H Methane Chloromethane (an alkane) (an alkyl halide) @2004 Thomson-Brooks/Cole Rearrangement reactions-a single reactant undergcHCH H HC H id atoms Acid catalyst H H CHa 1-Butene 2-Butene „ Substitution – two reactants exchange parts to give two new products „ Rearrangement reactions – a single reactant undergoes a reorganization of bonds and atoms