試題詳解

18. Photodissociation of chlorine molecules (Cl₂ + light 2 Cl‧) creates highly reactive chlorine radicals, which play important roles in chlorination of hydrocarbons, polymerization, and catalyzing the ozone decomposition reaction. According to the molecular orbital theory, what is the lowest-energy excitation pathway (initial MO → final MO) that causes a ground-state Cl₂ molecule to dissociate? (Assuming the MO's have higher energy than the MO.)
(A)
(B)
(C)
(D) (Ε)