A linear molecule, its two carbons are joined by a triple bond and have terminal fluorines: F-C≡C-F.

Preparation of difluoroacetylene is difficult, with danger of explosions and with low yields.

Nevertheless, the compound has been made, isolated, and characterized by various spectroscopical methods (MS, NMR, Photoelectron- and IR spectroscopy).

The compound is of interest as a precursor to fluoropolymers containing double bonds, analogous to polyacetylene.

At liquid nitrogen temperature, it is slowly changing to tetrafluorobutatriene, most likely through an intermediate of difluorovinylidene.