Exploring borinane-based multi-ammonium salts for epoxide (co)polymerization: insights into the structure–activity relationship

Three bifunctional borinane-based multi-ammonium salts (N + /B) B, C and D (B 8 N 3 (C 6 )Br 3 ; B 8 N 3 (C 2 )Br 3 ; B 10 N 4 (C 2 )Br 4 ) were synthesized, and the polymerization activities of these catalysts were evaluated using catalyst A, B 3 NBr, as reference.