25. In β-Hydrogen elimination, the follo..-阿摩線上測驗
25. In β-Hydrogen elimination, the following are true except: [2 pts]
(A)The metal center must have 18 valence electrons
(B) The metal center must have a vacant site
(C) There must be a hydrogen atom at the B position
(D) The M-C-C-H unit must be able to achicve coplanarity
(E) None of above is correct