Mechanisms

This video looks at the electrophilic addition reaction of hydrogen bromide with an asymmetric alkene (propene). It helps you to rack the movement of electrons and to gain a better understanding of why 2-bromopropane is the major product - in terms of the relative stabilities of the primary and secondary carbocation intermediates.

This video explains how optical stereoisomerism arises, how it can be detected using a polarimeter and how it may be used to analyse certain reaction mechanisms.