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pent-1-yne and 3-methyl but-1-yne are _ isomers

Question

pent-1-yne and 3-methyl but-1-yne are _ isomers

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Solution

Pent-1-yne and 3-methyl but-1-yne are not isomers.

Isomers are compounds that have the same molecular formula but different structural formulas.

Pent-1-yne has a molecular formula of C5H8, and 3-methyl but-1-yne has a molecular formula of C5H8 as well.

However, they are not isomers because they do not have the same connectivity of atoms.

In pent-1-yne, the triple bond is at the end of the carbon chain, while in 3-methyl but-1-yne, the triple bond is at the beginning of the carbon chain and there is a methyl group attached to the third carbon.

Therefore, they are not isomers.

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