by Thais Delgado-Abad, Jaime Martínez-Ferrer, Ana Caballero, Andrea Olmos, Rossella Mello, María Elena González-Núñez,* Pedro J. Pérez, Gregorio Asensio
Amazing reaction medium: Supercritical carbon dioxide, with zero dipole moment, lower dielectric constant than pentane, and non-hydrogen-bonding behavior, ionizes carbon–halogen bonds, dissociates the resulting ion pairs, and escapes from capture by the carbocation intermediates at temperatures above 40 °C. These properties allow the observation of carbocation chemistry in the absence of acids.
Angewandte Chemie International Edition
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