Tetraphenylboroxinate(1-) salts of monoborate cations: Synthesis and single-crystal X-ray structures of [Ph2B{OCH2CH2N(Me)(CH2)n}2][Ph4B3O3] (n=4, 5)

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