What does the newest IUPAC nomenclature have against unsaturati on?
I wonder, what are the exact IUPAC organic chemistry nomenclature rules that give the preference to the chain length over a number of unsaturated bonds, i.e. that justify, or prefer following names:
4-ethenyl-4-ethynylheptane over
3,3-dipropylpent-1-en-4-yne
3,5-dimethylideneheptane over
2,4-diethylpenta-1,4-diene
I wonder, what are the exact IUPAC organic chemistry nomenclature rules that give the preference to the chain length over a number of unsaturated bonds, i.e. that justify, or prefer following names:
4-ethenyl-4-ethynylheptane over
3,3-dipropylpent-1-en-4-yne
3,5-dimethylideneheptane over
2,4-diethylpenta-1,4-diene
1 Answer
May 19, 2018
Longest carbon chain is to be selected. If there exist options then longest carbon chain containing unsaturation is to be selected in preference to the saturated chain as shown in example 2,
4,4-dipropylhept-1-en-6-yne.
