RT Book,_Section T1 DFT Study of the Addition Of SO2 to 1,3- Butadiene and Derivatives A1 Cabaleiro Lago, Enrique Manuel A1 Hermida Ramón, Jose Manuel A1 Montero Campillo, María de la Merced A1 Peña Gallego, María de los Ángeles A1 Rodríguez Otero, Jesús AB Addition reactions of SO2 to 1,3-butadiene and heteroderivatives were studied by performing density functional theory (DFT) calculations together with the 6311+G* basis set. Reactants, products, and transition states for each reaction were localized and the IRC connecting reactants and products was also obtained. Magnetic properties were evaluated along the reaction path to elucidate the characteristics of the reactions studied with respect to their aromaticity and pericyclic character. The addition can proceed by means of a cheletropic reaction giving a fivemembered cycle as a product or via a cycloaddition resulting on a sixmembered cycle. The results thus obtained indicate that for most reactions studied the energy barrier is smaller for the cycloaddition process, whereas the most stable product comes from cheletropic reaction. From the analysis of the magnetic properties along the reaction path, all reactions exhibit aromaticity enhancement near the transition state and, therefore, show pericyclic character PB MDPI SN 3-906980-16-2 YR 2005 FD 2005 LK http://hdl.handle.net/10347/26887 UL http://hdl.handle.net/10347/26887 LA eng NO Cabaleiro-Lago, E.M.; Hermida-Ramón, J.M.; Montero-Campillo, M.; Peña-Gallego, Á.; Rodríguez-Otero, J. DFT Study of the Addition Of SO2 to 1,3- Butadiene and Derivatives, in Proceedings of the 9th International Electronic Conference on Synthetic Organic Chemistry, 1–30 November 2005, MDPI: Basel, Switzerland, doi:10.3390/ecsoc-9-01653 NO The 9th International Electronic Conference on Synthetic Organic Chemistry session Computational Chemistry DS Minerva RD 24 abr 2026