but-2-ynedinitrile

Dicyanoacetylene is used for nucleophilic addition; [4 + 2] cycloaddition reactions; metal complexes insertion reactions.

The synthetic route of Dicyanoacetylene is shown below:

Dicyanoacetylene can be stored indefinitely at dry-ice temperatures and is handled at rt. It is much more sensitive to the presence of oxygen, a polymerization or condensation reaction probably taking place.

Dicyanoacetylene purified by simple vacuum sublimation or atmospheric distillation.