Tetraphenylboroxinate(1-) salts of monoborate cations: Synthesis and single-crystal X-ray structures of [Ph 2B{OCH 2CH 2N(Me)(CH 2) n} 2][Ph 4B 3O 3] ( n = 4, 5)

Abstract

The salts, [Ph 2B{OCH 2CH 2N(Me)(CH 2) n } 2][Ph 4B 3O 3] ( n = 4, 5), were prepared in moderate yields in MeOH solution from reaction of Ph 2BOBPh 2 with [N(CH 2) n (Me)(CH 2CH 2OH)][OH] and PhB(OH) 2 in a 1:2:4 ratio. The reactions also lead to Ph 3B 3O 3. Both salts were characterized by NMR ( 1H, 13C, 11B) IR, and single-crystal XRD studies. The salts are comprised of cationic monoborates (zwitterionic, 2N + and 1B −) and tetraphenylboroxinate anions.