ALKYNES Introduction Structure and Bonding

• Alkynes contain a carbon-carbon triple bond.
• Terminal alkynes have the triple bond at the end of the carbon chain so that a hydrogen atom is directly bonded to a carbon atom of the triple bond.
• Internal alkynes have a carbon atom bonded to each carbon atom of the triple bond.
• An alkyne has the general molecular formula CnH2n-2, giving it four fewer hydrogens than the maximum possible for the number of carbons present. Thus, the triple bond introduces two degrees of unsaturation.