Autor/es:
OLGA HERRERA, JORGE NIETO, ADRIANA OLLETA, SILVIA LANE
Resumen:
he photoinduced reaction of 2-iodothiophene in n-heptane, dichloromethane and methanol was studied at room
temperature from experiments carried out with degassed solutions. The photoproducts of the reaction were mainly
thiophene and small amounts of iodine in all three solvents used. The concentration of 2-iodothiophene decreases
throughout photolysis, following a first-order rate law and the pseudo-first-order rate constants were determined in
the three solvents used. The photochemistry of the system was quantified determining the quantum yields of
2-iodothiophene consumption and thiophene formation in n-heptane solutions. The results show that under the
experimental conditions of this research, products deriving only from the reaction of the thienyl radical were
observed. To support the experimental results, calculations were performed of the ionization potential of the thienyl
radical, electron affinity of the iodine atom and free energy of solvation