Question

CH2=C(CH2CH2CH3)2,correct IUPAC name

Answer 1

2-propylpentene

CH2CH2CH3
　　　　　　|
CH3CH2CH2C=CH2

Answer 2

Answer : The IUPAC name of the given compound is, 2-propylpent-1-ene

Explanation :

The basic rules for naming alkene are :

• The longest possible carbon chain should include the carbons of double bond.
• The longest chain is given the name by replacing suffix -ane with -ene.
• The numbering is done in such a way that first carbon of double bond gets the lowest number.
• The carbon atoms of the double bond get the preference over the other substituents present in the parent chain.
• The position of double bond is indicated by placing the number before the suffix -ene.
• If more than one double bond is present then the location of each double bond is indicated just before the suffix and the suffix used for two double bonds is -diene, for three double bonds is -triene and so on.

Thus the IUPAC name of the given compound is, 2-propylpent-1-ene.

The structure of the given compound are shown below.