The principles for constructing diarylpolyfluoromethine dyes with the [4-(CH3)2NC6H4(CF=CF)nCFC6H4N-(CH3)2-4']+ X- structure from their difluorovinylene predecessors have been developed and their electronic and F-19 NMR spectra studied. The difluorovinylene shift is these dyes has been shown to be greater than that in their hydrogen analogues.
Alkali Fluorides as Catalysts in Reactions Involving Unsaturated Fluorocarbons<sup>1</sup>