Diynes,Enynes,and Triynes Number from chain that ends nearest a double or triple bond-double bonds is preferred if both are present in the same relative position CH3 HC三CCH2CHCH2CH=CH2 HC=CCH,CHCH2CH2CH=CHCH3 65 3 2 1 23 45 89 1-Hepten-6-vne 4-Methvl-7-nonen-1-vne CHCH2CH2CH2之 CH CH2CH-CH CH3CH2C=C之 Butyl 1-Butenyl 1-Butynyl 4aal黑e (a vinylic group) (an alkynyl group) Alkynes as substituents are called "alkynyl" Diynes, Enynes, and Triynes „ Number from chain that ends nearest a double or triple bond – double bonds is preferred if both are present in the same relative position Alkynes as substituents are called “alkynyl