Alkynes- Are unsaturated (not all single bonds) hydrocarbons (hydrogen and carbon only) containing 1 carbon to carbon triple bond "C≡C".
The rule for naming is they all end with "-yne".
The general formula is CnH2n-2, n is the number of carbons is used to determine the number of hydrogen atoms. Example n=5, so H=(2(5)-2)=8
TEST Question-What is the minimum number of carbons that are required to have an alkyne?
Since is no such molecule as methyne!!! You need at least 2 carbons to have a triple bond.
Naming Compounds- Again, ignore all the hydrogen's. We only worry about carbon atoms.
Rule #1-Name the longest chain with the triple bond. It is not always the longest chain of carbons. End it with "-yne".
Rule #2-When necessary use the lowest number to give the location of triple bond in the longest chain.