What is the structural formula of but- 2 -yne

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But-2-yne is an alkyne with a four-carbon chain and a triple bond starting at the second carbon. Step 1: Identify the parent chain and functional group. The prefix "but-" indicates a chain of four carbon atoms. The suffix "-yne" indicates the presence of a carbon-carbon triple bond. Step 2: Position the triple bond. The number "2" indicates that the triple bond is between the second and third carbon atoms in the chain. Step 3: Draw the carbon skeleton with the triple bond. C − C ≡ C − C Step 4: Add hydrogen atoms to satisfy the valency of each carbon atom (four bonds per carbon). The first carbon (C1) has one single bond, so it needs three hydrogen atoms. The second carbon (C2) has one single bond and one triple bond (total 4 bonds), so it needs no hydrogen atoms. The third carbon (C3) has one triple bond and one single bond (total 4 bonds), so it needs no hydrogen atoms. The fourth carbon (C4) has one single bond, so it needs three hydrogen atoms. The structural formula of but-2-yne is: CH₃ − C ≡ C − CH₃

What is the structural formula of but- 2 -yne

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Step-by-step solution

Identify the parent chain and functional group.

Position the triple bond.

Draw the carbon skeleton with the triple bond.

Add hydrogen atoms to satisfy the valency of each carbon atom (four bonds per carbon).

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