Monday, October 21, 2013

Supercritical Carbon Dioxide: A Promoter of Carbon–Halogen Bond Heterolysis

by Thais Delgado-Abad, Jaime Martínez-Ferrer, Ana Caballero, Andrea Olmos, Rossella Mello, María Elena González-Núñez,* Pedro J. Pérez, Gregorio Asensio 

Thumbnail image of graphical abstract

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

No comments:

Post a Comment