Formation of high concentrations of BrO(2) in acidic bromate solutions.
A new procedure to produce the BrO(2) transient species allowed time-resolved UV-vis spectra that show a structured band (lambda(max) = 502 nm) in dichloromethane to be obtained. In water, because of the increase of the dielectric constant, the lambda(max) presents a blue shift to 474 nm and the species decomposes much faster. The time-resolved spectra show evidence for its equilibrium with a nonidentified colorless form. This route opens new possibilities to the study this species in solution.
Alves
Wagner A
WA
Departamento de Química Inorgânica, Instituto de Química, Universidade Federal do Rio de Janeiro, PO Box 68563, Rio de Janeiro, RJ, 21945-970, Brazil.
Côrtes
Carlos E S
CE
Faria
Roberto B
RB