89.1 Introduction of Chemical Kinetics (3)Overall reaction (1) Category of chemical reactions According to the number of elementary reactions involved, the overall reaction can be classified into simple reaction Diels-Alder addition Overall reaction ethylene butadiene cyclohexene complex reactionAccording to the number of elementary reactions involved, the overall reaction can be classified into: Ethylene butadiene cyclohexene simple reaction Diels-Alder addition: complex reaction Overall reaction (3) Overall reaction (1) Category of chemical reactions §9.1 Introduction of Chemical Kinetics