Posts Tagged ‘Diels Alder cycloaddition’

cis-Butene: a reaction coordinate dissected and methyl flags.

Wednesday, October 12th, 2011

In two previous posts, I have looked at why cis-butene adopts conformation (a) rather than (b). I suggested it boiled down to electronic interactions between the methyl groups and the central alkene resulting in the formation of a H…H “topological” bond, rather than attraction between the H…H region to form a weak chemical “bond“. Here I take a look at what happens when that central C=C bond is gradually removed.