Nucleophilic substitution is a reaction initiated by a species with an unshared pair of electrons (a nucleophile) that replaces a substituent (a leaving group) that departs with an unshared electron pair.
I recently stumbled upon a free App for the iPad that I plan to introduce to my students during our upcoming organic unit. This is just the first topic that I am using the app for. There are many more uses for the App in a number of units.
