Y. Bedjanian et al., KINETIC-STUDY OF THE BR-2 REACTIONS - HEAT OF FORMATION OF THE BRO RADICAL(IO, I+BRO AND BR+I), Chemical physics letters, 266(1-2), 1997, pp. 233-238
Using the discharge-flow mass spectrometric method, the rate coefficie
nts for the reactions Br + IO --> I + BrO (2), I + BrO --> Br + IO (3)
and Br + I-2 --> I + IBr (4) have been measured at 298 K and 1 Torr:
k(2) = (2.3 +/- 0.3) x 10(-11), k(3) = (1.45 +/- 0.20) X 10(-11) and k
(4) = (1.20 +/- 0.15) X 10(-10) cm(3) molecule(-1) s(-1). The value of
the enthalpy of BrO formation has been derived from the kinetic data
obtained for reactions (2) and (3): Delta H-f,H-298(BrO) = 28.6 +/- 1.
4 kcal mol(-1).