Several fluorinated diols were synthesized from commercially available fluorinated alcohols via mercury-photosensitized dehydrodimerization in the vapour phase. In almost all cases, the corresponding dl- and meso-diols were obtained in a 50 : 50 ratio. Field-ionization (FI) and field-desorption (FD) mass spectrometry proved effective as an analytical method for these diols. The nuclear magnetic resonance
通过气相中的
汞光敏脱氢二聚反应,由市售的
氟化醇合成了几种
氟化二醇。在几乎所有情况下,都以50:50的比例获得相应的dl-和内消旋二醇。场电离(FI)和场解吸(FD)质谱被证明是有效的这些二醇的分析方法。的对称取代的二醇的核磁共振(NMR)特性上其立体
化学性质强烈地依赖(DL -和内消旋-diastereoisomers)和取代基。–CF 2的存在与1,1,4,4-四
氟-
2,3-丁二醇和1,1,2,2,5,5,6,6-八
氟-
3,4-己二醇中的H端基引起另外的不等价性在内消旋-形式,由于分子的不对称性。的和1,1,4,4-四
氟-
2,3-丁二醇的NMR谱和NMR谱1,1,2,2,5,5,6,6-八
氟-
3,4-己二醇已充分解释。