The behaviour of the adducts of OH with the aromatics benzene and toluene has been studied at 130 mbar in Ar in the presence of NO and NO2 at four temperatures in the range from 300 to 350K. Biexponential decays of OH are observed in the absence of NOx and in the presence of NO. After eliminating NO2 impurities from the NO sample, the reactivity of the adducts againt NO was observed to vanish, and upper limits of <10-14 and <3x10-14 cm3s-1 are obtained for the reactions of benzene-OH and toluene-OH with NO from a quantitative treatment of the biexponential decays of OH. Triexponential decays of OH are observed in the presence of NO2 and aromatics that can likewise be evaluated quantitatively. Values of (2.5±0.6) and (3.7±0.6)x10-11 cm3s-1 are obtained for the reactions of benzene-OH and toluene-0H with NO2, independent of temperature. From the behaviour of OH in the presence of toluene, the rate constant for the addition channel is obtained to be k = (1.9±0.5)x10-13 exp ((+1040±70)K/T) cm3s-1, and the rate constant for the reverse reaction (the unimolecular decomposition of the adduct toluene-OH): k = (2.5 ± 0.7)x1012 exp ((-8040±120)K/T) s-1, leading to a bond energy of OH to toluene in the adduct of (78±1) kJ/mol. A rate constant of k = 2x10-12 exp ((-395±200)K/T) cm3s-1 is obtained for the abstraction channel in the same temperature range.