Further work conducted by Clark et al. (2010) attributed significant
focus on isoprene peroxy radical-water complexes, proposing
geometries, lifetimes, and equilibrium constants for 8 bhydroxy
isoprene derivatives that can exist in their complexed
form. The proportion of isoprene derived peroxy radicals (RU14O2,
RU12O2, RU10O2, and NRU14O2) involved in the complexation has
been determined at 298 K in this study. The equilibrium constant of
2.60 1019 cm3 molecule1, associated with the most strongly
bound species the trans-4-OH isoprene hydroxyalkyl peroxy
radical, was considered in the calculation in order to derive an
upper complexation limit. The mixing ratio of isoprene derived
RO2.H2O complexes is found to be up to 2 ppt in the tropical region.
The proportion of isoprene derived peroxy radical complexed with