Propargyl group

In organic chemistry, the propargyl group is a functional group of 2-propynyl with the structure HC≡C−CH₂−. It is an alkynyl group derived from propyne (HC≡C−CH₃).

The term propargylic refers to a saturated position (sp³-hybridized) on a molecular framework next to an alkynyl group. The name comes from mix of propene and argentum, which refers to the typical reaction of the terminal alkynes with silver salts.^{[citation needed]}

The term homopropargylic designates in the same manner

• a saturated position on a molecular framework next to a propargylic group and thus two bonds from an alkyne moiety.^[1]
• a 3-butynyl fragment, HC≡C−CH₂CH₂−, or substituted homologue.