Both of the above reactions are accompanied by side reactionsthat produce many products, such as methanol, isopropylalcohol, n-propyl alcohol, n-butyl alcohol, isobutyl alcohol,acetone, acetaldehyde, isobutane, n-butane, hexane, methane,CO2, ethane, propadiene, propylene, and propane. The mostundesirable side reaction is methanation (eq 3)