Regioselectivity in addition of atomic fluorine to alkenes
作者:Carl L. Bumgardner、James G. Carver、Robert L. Leonard
DOI:10.1016/s0022-1139(00)80042-1
日期:1993.2
temperature leads to the addition of F and NF2 across the double bond. The ratioof terminal to internal addition of F to propene was found to be 1.4:1 after correctingfor the decomposition of vibrationally excited intermediates. In the case of 1,1-difluoroethene,the corrected ratio of F addition is 5:1 with addition at the methylene sitepredominating. The difference in selectivity of F addition to propene and
在室温下用丙烯和1,1-二氟乙烯对N 2 F 4(NF 2)进行辐照会导致F和NF 2的添加跨双键。校正振动激发的中间体的分解后,发现F与丙烯的末端与内部加成之比为1.4:1。在1,1-二氟乙烯的情况下,F添加的校正比例为5:1,主要在亚甲基位置添加。F加成丙烯和1,1-二氟乙烯的选择性差异与烯烃的π-π*三重态的自旋密度差异以及底物烯烃的HOMO系数差异相关,即选择性的模式是可预测的Shaik和Canadell的状态相关图模型。