Engineering
Chemistry
IUPAC Nomenclature of Organic Compound
Question

For the following compounds, write structural formulas and IUPAC names for all possible isomers having the number of the double or triple bond as indicated :

(a) C4H8 (one double bond)
(b) C5H8 (one triple bond)
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Solution

Three isomers are possible. Their IUPAC names are

(I) pent – 1 – yne, 
(II) pent – 2 – yne and 
(III) 3 – methylbut – 1 – ene
The structural formulas are as shown.