作者:Carl G. Krespan、David A. Dixon
DOI:10.1016/0022-1139(96)03388-x
日期:1996.4
High-fluorine-content aluminum chlorofluoride, as prepared by Cl/F exchange of aluminum chloride with one of a number of organofluorine compounds, is a very active Lewis acid capable of condensing an allylic fluoride with another fluoroolefin at low temperature. In addition to a description of broader scope, details of the selective reaction of hexafluoropropene with tetrafluoroethylene to form F-pentene-2
通过将氯化铝与多种有机氟化合物之一进行Cl / F交换制得的高氟含量的氯氟化铝是一种非常活泼的路易斯酸,它能够在低温下使烯丙基氟与另一种氟烯烃缩合。除了更广泛的描述外,还介绍了六氟丙烯与四氟乙烯选择性反应生成F-戊烯-2的细节,以及支持多氟烯丙基阳离子物种作为中间体的证据。从头算算结果证实了所提出机制的可行性,并进一步表明,在适度的温度下,在能量上很容易获得氟代碳酸酯类化合物中的1,3-氟转移。修订的C 3 F 8(ΔH ˚F 0 = -1750±12.4千焦耳摩尔-1)和HFP(ΔH ˚F 0 = -1128±千焦耳摩尔-1)已经被算出。据报道,一些简单的金属卤化物具有氟化物亲和力。