Master Organic Chemistry

Why Are Endo Products Favored in the Diels-Alder Reaction?

May 11, 2018 By James Ashenhurst 2 Comments

[Advanced] Secondary Orbital Interactions - A Rationale For Why Endo Products Are Favored   In our last post, we noted that endo products tend to be favored over exo products in the Diels-Alder reaction.  [We also introduced a quick-and-dirty rule for telling the difference between endo- and exo- … [Read more...]

Filed Under: Dienes and MO Theory Tagged With: diels alder, dienes, dienophiles, endo, exo, homo, kinetic product, lumo, thermodynamic product

Reactions of Dienes: 1,2 and 1,4 Addition

March 22, 2017 By James Ashenhurst 1 Comment

In today's post we'll discuss  1,2- and 1,4- addition to dienes - specifically, the addition of strong acid such as HBr. Here's the summary of the key points.  Addition To Alkenes, Revisited Waaay back in the day we talked about addition reactions of alkenes. Remember Markovnikov's rule in the … [Read more...]

Filed Under: Dienes and MO Theory Tagged With: 1, 2-addition, 4-addition, dienes, energy diagram, kinetic control, kinetic product, thermodynamic control, thermodynamic product

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