Nomenclature: UPAC H Find the longest chain containing the riple bond Change -ane ending to yne Number the chain, starting at the end closest to the triple bond Give branches or other substituents a number to locate their position = Chapter 9Chapter 9 3 Nomenclature: IUPAC • Find the longest chain containing the triple bond. • Change -ane ending to -yne. • Number the chain, starting at the end closest to the triple bond. • Give branches or other substituents a number to locate their position. =>