The relationship between 19F chemical shifts in halogenated propanes and their structures are elucidated using MNDO calculations to determine the population of rotamers. The pairs of atoms gauche to a fluorine atom and van der Waals interaction between the two terminal substituents are responsible for the 19F chemical shifts. The differences among chemical shifts in diastereomers are also discussed
[EN] PROCESSES FOR THE SYNTHESIS OF 3-CHLOROPERFLUORO-2-PENTENE, OCTAFLUORO-2-PENTYNE, AND 1,1,1,4,4,5,5,5-OCTAFLUORO-2-PENTENE<br/>[FR] PROCÉDÉS DE SYNTHÈSE DE 3-CHLOROPERFLUORO-2-PENTÈNE, OCTAFLUORO-2-PENTYNE, ET 1,1,1,4,4,5,5,5-OCTAFLUORO-2-PENTÈNE
申请人:DU PONT
公开号:WO2009079525A3
公开(公告)日:2009-11-12
Oxidation of polyhalogeno-compounds. Part I. Photochemical oxidation of certain fluoroalkanes