Problems and exercisesKinetics vs. Thermodynamics

1. Interpret the diagram

In an energy diagram, reactant A can give product D through a low barrier (B) or product E through a high barrier (C). E is more stable than D. Which product forms faster? Which is the more stable?

2. What controls each case?

State whether these statements describe kinetic or thermodynamic control:

1. The major product is the one that forms fastest.
2. The major product is the one of lowest energy.
3. Low temperature and short reaction time.
4. High temperature, reversible reaction and long time.

3. Halogenation of methylbutane

In the halogenation of 2-methylbutane, why are the primary hydrogens like the 'shoplifting' and the tertiary one like the 'big robbery'?