Alkynes, with No Acetylenic Hydrogen

May be highly flammable gases (explosive).

The carbon-carbon triple bond provides a site in which addition across this triple bond may occur with the release of considerable energy in the form of heat. These compounds react with strong reducing agents such as hydrides, strong acids, halogenating agents, inorganic cyanide salts, sulfides, and azo compounds.

The gases are not toxic per se, but can act to exclude oxygen in breathing zone during an incident.

Alkynes (no attached hydrogen) have the formula R-CC-R, with R representing any alkyl group such as methyl, ethyl, etc. or halide attached to the carbon. Use of many of these compounds are important in the synthesis of other chemicals. The lack of a hydrogen atom adjacent to the triple bond makes these alkynes much less reactive than alkynes with an attached hydrogen atom (Group 63).

1,4-butynediol, crotonylene, dichloroacetylene.