Chemistry of a geminal frustrated Lewis pair featuring electron withdrawing C6F5 substituents at both phosphorus and boron

Abstract
Hydroboration of the electron poor phosphine (1-propenyl)P(C6F5)2 with Piers' borane [HB(C6F5)2 ] gave the geminal frustrated Lewis pair (C6F5)2P–CH(Et)–B(C6F5)2 . It undergoes 1,2-addition reactions to an alkene and an alkyne and to the CN bond of an isocyanate. With mesityl azide it undergoes a 1,3-addition reaction.