Question

11. Calculate the ΔH° for the addition of H2O2 to ethane to give 1,2-ethanediol. (BDE HO-OH is 49 kcal/mol, C=C pi bond is 65 kcal/mol).

12. For the previous problem, why is the pi BDE for C=C 65 kcal/mol rather than simply the difference between H3C-CH3 and C=C as listed in tables of BDE (Table 5.1 7th ed or Table 3.2 6th ed. for example)?

13) Draw a properly labeled reaction coordinate diagram for a reaction with the following criteria: make sure to clearly indicate ΔG and any activation energies (for the forward reaction) as well as all intermediates and transition states.

a) exergonic 3 step reaction

b) the first step is the rate-determining step

c) the second intermediate is more stable than the first intermediate

d) the third step of the reaction is faster than the reverse of the second step

Answer 1