The formation, decay, and absorption spectra of transients formed from pyrrolidine in aqueous solutions were studied. The solvated electron ( ${\rm e}_{{\rm aq}}^{-}$) reacts with the protonated and the nonprotonated pyrrolidine forming the ${\rm C}_{4}{\rm H}_{8}{\rm N}$· radical. The rate constants are: $k({\rm e}_{{\rm aq}}^{-}+{\rm C}_{4}{\rm H}_{8}{\rm NH}_{2}{}^{+})=(7.5\pm 1.5)\times 10^{6}\ M^{-1}\ \text{second}^{-1}$ and $k({\rm e}_{{\rm aq}}^{-}+{\rm C}_{4}{\rm H}_{8}{\rm NH})=(1.1\pm 0.5)\times 10^{6}\ M^{-1}\ \text{second}^{-1}$. The ${\rm C}_{4}{\rm H}_{8}{\rm N}$· radical has an absorption maximum at 3200 A, $\epsilon =510\ M^{-1}\ {\rm cm}^{-1}$, and disappears in a second-order reaction, $k=3.1\times 10^{9}\ M^{-1}\ \text{second}^{-1}$. The rate constants for the reaction of aqueous pyrrolidine with OH radicals, $k=9.6\times 10^{9}\ M^{-1}\ \text{second}^{-1}$ for pH 2 and $k=1.45\times 10^{10}\ M^{-1}\ \text{second}^{-1}$ for pH 8, were also determined. The pyrrolidine transients formed b...