[en] The reaction of 2-hydroxy-2-propyl (IP) radical with 12 acrylate type monomers in aqueous solutions was investigated by means of pulse radiolysis: the molecular structure effects and the mechanisms were evaluated. Radicals were generated either in the reaction of hydrated electron with acetone and subsequent protonation or in the H abstraction reaction by OH radicals from i-propanol. IP radical reacts with acrylamides and acrylic acid esters in radical addition reaction of the type: (CH₃)₂(OH)C ^· + CH₂ =CH-C(O)R ^→ (CH₃)₂(OH)C-CH₂-C ^·H-C(O)R with rate coefficients between 3.2 x 10⁷ and 1.9 x 10⁸ mol^-1 dm³ s^-1. Rate coefficients of the reaction with maleic acid (neutral), dimethyl- and diethyl maleate are between 1.3 x 10⁸ and 4.7 x 10⁸ mol^-1 dm³ s^-1. The values for dimethyl- and diethyl fumarate are ca. one order of magnitude higher. However with maleates and fumarates there is also a few percent contribution from the electron transfer reaction of the type (CH₃)₂(OH)C ^· + ROOC-CH=CH-COOR + H₂O ^→ ROOC-CH=CH-C ^·O^-OR + (CH₃)₂CO + H₃O⁺. In neutral solutions and at pH ∼3 and ∼9, the same rate coefficients were measured. However, in dialkyl maleate and -fumarate solutions between pH 9.5 and 10.5, a base catalyzed decomposition of the IP radical adduct was observed forming electron adduct: ROOC-C((CH₃)₂(OH)C)H-C ^·H-COOR + OH^-→ ROOC-CH=CH-C ^·O^-OR + (CH₃)₂CO + H₂O. Molecular structure effects were evaluated using log k-σ _p and log k-LUMO plots