Abstract A kinetic and product study of the reaction of a series of α-methyl-substituted N- methylpiperidines with thermally generated 1 O 2 in MeCN was carried out. It was found that as the number of α-methyl groups (Me in α-position relative to the N-atom) increases, the rate of 1 O 2 quenching (physical plus chemical) slightly decreases. This finding shows that, with respect to the reaction rate, steric effects are much more important than electronic ...
