transposition of F(+) for O. Metastable ion decompositions of the adduct ions yield the metathesis products. Decompositions of fluorocycloalkyl cations formed in this manner give evidence for the same kinds of rearrangements as take place in CH(3)CH(2)CHF(+). Density functional calculations confirm that F(+) for O metathesis takes place via addition of CF(3)(+) to the carbonyl oxygen followed by transposition
气态CF(3)(+)用于O与简单的羰基化合物交换F(+)。CF(3)(+)与
丙醛在气相中反应,通过两个竞争途径生成(CH(3))(2)CF(+)。从1-(13)C-
丙醛开始,主要途径(80%)产生(CH(3))(2)CF(+),其中甲基之一带有碳标记。次要途径(20%)产生(CH(3))(2)CF(+),碳标记处于中心位置。这两个途径的相对比例是通过中性CH(3)CF = CH(2)的(19)F NMR分析测得的,该中性CH(3)CF = CH(2)是在<10( -)(3)电子轰击流(EBFlow)反应器中的Tor。形成碳直接与氟键合的烯烃意味着(至少在次要产物中)用于O换位的F(+)通过加成物形成,接着是1,3-原子转移,然后将CH(3)CH(2)CHF(+)异构化为更稳定的(CH(3))(2)CF(+)。CF(4)作为
化学电离(CI)反应气的使用会导致CF(3)(+)加成离子用于多种酮