title: Fast H/D exchange of B,B',B''-tribromoborazine in C6D6 in the presence of aluminum tribromide: first evidence for an electrophilic substitution reaction of borazines in solution.
abstract: A solution of B,B',B''-tribromoborazine (BrBNH)(3) in excess C(6)D(6) in a sealed NMR tube shows no changes for over 14 months at room temperature but undergoes fast (within minutes) H/D exchange in the presence of AlBr(3) as a Lewis acid, as evidenced by (1)H, (2)H, (11)B, and (27)Al NMR spectroscopy. The proposed electrophilic exchange mechanism is in agreement with the results of DFT computations. To our knowledge, this is the first example of the electrophilic substitution reaction of borazines in solution.
authors.affiliation: Inorganic Chemistry Group, Department of Chemistry, Saint Petersburg State University, University Pr. 26, Old Peterhof, 198504, Russia. alextim@AT11692.spb.edu
authors.forename: Alexey Y
authors.initials: AY
authors.lastname: Timoshkin
authors.forename: Igor V
authors.initials: IV
authors.lastname: Kazakov
authors.forename: Anna S
authors.initials: AS
authors.lastname: Lisovenko
authors.forename: Michael
authors.initials: M
authors.lastname: Bodensteiner
authors.forename: Manfred
authors.initials: M
authors.lastname: Scheer