Noun
a colorless flammable gas used chiefly in welding and in organic synthesis
Source: WordNetMolecules called ene-diynes feature a ring containing an alkene ("ene") between two alkyne groups ("diyne"). Source: Internet
Polyynes, a subset of this class of natural products, have been isolated from a wide variety of plant species, cultures of higher fungi, bacteria, marine sponges, and corals. citation Some acids like tariric acid contains an alkyne group. Source: Internet
The Prins reaction occurs when a nucleophilic alkene or alkyne reacts with an aldehyde as electrophile. Source: Internet
The resulting polymers, called polyacetylenes (which do not contain alkyne units) are conjugated and can exhibit semiconducting properties. Source: Internet
Unsaturated ketones Ketones containing alkene and alkyne units are often called unsaturated ketones. Source: Internet