Which answer provides the correct name for name the following hydrocarbon?

Moving left to right: A hydrocarbon chain made of a methyl group (CH subscript three) single bond carbon triple bond carbon single bond CH bonded to a methyl group (CH subscript three) and a chain including a methelyne group (CH subscript two) single bond methyl group (CH subscript three).

4-ethyl-2-pentyne

4-methyl-2-hexyne

2-heptyne

4-methy-hexane

Question

Chemistry

Kennedy Spears

29 December, 02:16

Which answer provides the correct name for name the following hydrocarbon?

Moving left to right: A hydrocarbon chain made of a methyl group (CH subscript three) single bond carbon triple bond carbon single bond CH bonded to a methyl group (CH subscript three) and a chain including a methelyne group (CH subscript two) single bond methyl group (CH subscript three).

4-ethyl-2-pentyne

4-methyl-2-hexyne

2-heptyne

4-methy-hexane

+1

Answers (1)

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Alicia · Answer 1

I think the correct answer would be the third option. The correct name for the hydrocarbon described above would be 2-heptyne. It has a chemical formula written as CH3 - CH2 - CH2 - CH2 - C ≡ C - CH3. Counting the number of carbons, we have 7 carbon atoms so we use the prefix hepta-. Since it has a triple bond then it is an alkyne. So, it would be named as heptyne. The triple bond is located on the second carbon atom so we write 2 before the name to indicate the location of the triple bond. The name of the compound would be 2-heptyne.