Tags: Chemical Compound, Chemical Substance.
Diacetylene (also known as butadiyne) with the formula C4H2 is a highly unsaturated hydrocarbon that contains three single bonds and two triple bonds. It is the first in the series of polyynes. The trivial name diacetylene refers to the two C-C triple bonds and the possible formation from acetylene (see below). It does not mean that diacetylene is the formal dimer of acetylene what is rather true for Butenyne or Cyclobutadiene.
