What is the best name for the molecule below? (2 points)

a compound with a total of nine carbons with a double bond and the rest single bonds. there is a straight chain of six carbons along the bottom with a double bond between the fifth and sixth carbons when counting from left to right. there is a propyl group branching off of the third carbon from the left.

4-ethyl-6-heptene
4-propyl-1-hexene
4-ethyl-1-heptene
3-propyl-5-hexene

4-ethyl-1-heptene

Explanation: The IUPAC nomenclature follows following rules

1. The longest carbon chain is chosen which must include the functional groups, double and triple bonds.

2. The numbering of the chain starts from the end such that the functional group or the double or triple bond gets the lowest number.

3. The carbons which do not get any number are called as substituents.

The name starts with the number of the carbon bearing the substituent, followed by the name of the substituent. Thus 4-propyl. Then the word root is written which is the number of carbons in the longest chain. Thus it is hept. Then the suffix is the number and name of the functional group or double and triple bond. Thus 1-ene.

The name is 4-ethyl-1-heptene.

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