Question

Provide the IUPAC names of these hydrocarbons.

CH3CH=CHC(insert triple bond)CCH=CHC(insert triple bond)

CH3CH=CHCH2C(insert triple bond)CCH2CH=CHCH3

Answer 1

According to IUPAC

Root word: indicates number of carbon atoms in the longest chain = 9 carbons

Primary suffix : indicates double or triple bond presence in compound = 2 double bonds, 2 triple bonds

Secondary suffix : indicates the function group present in the compound = NO functional group

Primary prefix : indicates the substituents on the longest chain = No substituents

Secondary prefix : indicates the Cyclo substituent in the compound = no cyclo structure

Hence the name is Non-1,4-diyne-3,7-diene

According to IUPAC

Root word: indicates number of carbon atoms in the longest chain = 10 carbons

Primary suffix : indicates double or triple bond presence in compound = 2 double bonds, 1 triple bonds

Secondary suffix : indicates the function group present in the compound = NO functional group

Primary prefix : indicates the substituents on the longest chain = No substituents

Secondary prefix : indicates the Cyclo substituent in the compound = no cyclo structure

Hence the name is Dec-5-yne-2,8-diene.