作者:Thais Delgado-Abad、Jaime Martínez-Ferrer、Ana Caballero、Andrea Olmos、Rossella Mello、María Elena González-Núñez、Pedro J. Pérez、Gregorio Asensio
DOI:10.1002/anie.201303819
日期:2013.12.9
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.
惊人的反应介质:超临界二氧化碳,偶极矩为零,比戊烷低的介电常数,并且无氢键行为,使碳-卤素键电离,离解所得的离子对,并在高于温度的条件下逃脱了被碳正离子中间体捕获40℃。这些特性使得可以在不存在酸的情况下观察碳正离子化学反应。