Alkyne Nomenclature HC=CCH2CH2CH3 1-pe ntyne 4-decyne CH2C=C-CH3 3-(2-butynyD)cyclohexe ne 5-phe nyl-1-he pte n-6-yneAlkyne Nomenclature HC CCH2 CH2 CH3 1-pentyne 4-decyne CH2 C C CH3 3-(2-butynyl)cyclohexene 5-phenyl-1-hepten-6-yne