Which nomenclature is not according to IUPAC system? Options: 
2–Methyl–3–phenylpentane
3–Ethyl-4, 4-dimethylheptane
CH ≡ C – CH = CH – CH3
Pent-3-en-1-yne
CH2= CH – C ≡ CH
Bnt-1-yne-3-ene
Which nomenclature is not according to IUPAC system?
| 2–Methyl–3–phenylpentane | |
| 3–Ethyl-4, 4-dimethylheptane | |
| CH ≡ C – CH = CH – CH3 Pent-3-en-1-yne | |
| CH2= CH – C ≡ CH Bnt-1-yne-3-ene |
Dear student,
The correct option is (4) that is but-1-yne-3-ene.
The correct IUPAC name of this compound is but-1-ene-3-yne, this is because whenever double and triple bonds is present in a compound the first preference is given to double bond which means that the naming of the compound is done in such a way that the carbon with double bond gets lowest number.
Regards
The correct option is (4) that is but-1-yne-3-ene.
The correct IUPAC name of this compound is but-1-ene-3-yne, this is because whenever double and triple bonds is present in a compound the first preference is given to double bond which means that the naming of the compound is done in such a way that the carbon with double bond gets lowest number.
Regards