Boron and aluminum compounds have been widely utilized in both organic and inorganic syntheses. 1 Many of the reaction characteristics common to both these elements depend on the availability of the empty p orbital that makes these compounds electrophilic or Lewis acidic. 2 Accordingly, trivalent B and Al compounds A (BX3 and AlX3) readily react with a variety of neutral or negatively charged Lewis bases (L) to form the corresponding ...