H H0: H0-C- H HH H H nucleophile electrophile transition state product leaving (substrate) group The reaction is said to be concerted,taking place in a single step with the new bond forming as the old bond is breaking. The transition state is a point of highest energy(not an intermediate). H HO- HH 」transition state HO H H reaction coordinate→ Ch06 Alkyl Halides (landscape) Page 10 Ch06 Alkyl Halides (landscape) Page 10 The reaction is said to be concerted, taking place in a single step with the new bond forming as the old bond is breaking. The transition state is a point of highest energy (not an intermediate)