In each reaction, label the reactants as Lewis acids (electrophiles) or Lewis bases (nucleophiles). Use curved arrows to show the movement of electron pairs in the reactions. Draw in any nonbonding electrons to show how they participate in the reactions.
Solution 53SP :
Step 1:Lewis acid is one which accepts a pair of electrons and it is called as electrophiles. Lewis base is one which donates electrons to nucleus with an empty orbital and is also called as nucleophiles.