A hydrocarbon containing a chain of four carbon atoms with one triple bond between two of the carbons.
From but- (four carbon atoms) + -yn or -yne (suffix indicating a triple bond between carbons). Related to butyne, an alternative name for the same compound.
Alkynes like butyn were crucial in the early days of synthetic organic chemistry and helped chemists understand how molecules could be built and rearranged in laboratory synthesis.
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