Which of the following compounds represent 2 , 4 − d i m e t h y l − 3 − p e n t a n o n e 2,4-dimethyl-3-pentanone 2 , 4 − d im e t h y l − 3 − p e n t an o n e ?

Which of the following compounds represent 24 Dimethyl 3 Pentanone? Alright. So, Pentanone means it's a 5 carbon chain. So let's see which ones are 5 carbon chains. So we have 123456. This wouldn't work. 12345. Okay. 123456. That wouldn't work. 1, 2, 3, 4, 5. Alright. So right now it could be b or d. We need the carbonyl carbon to be on carbon number 3. So 123. 123. Okay. So for both of these, the carbonyl carbon is carbon number 3. And then on carbons 24, we need a methyl group. Here though, both my methyl groups are on carbon number 2 here. So this would actually be 22 dimethyl. This would not work. The answer is d, because we have a methyl group on carbon 2 and a methyl group on carbon 4. So this would be 24 dimethyl, the carbonyl carbon is 3 on carbon 3, so 3, 5 carbon chain pentanone. So option d would be our final answer for this practice question.

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22. Organic Chemistry

Naming Ketones

General Chemistry

22. Organic Chemistry

Naming Ketones

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Multiple Choice

Which of the following compounds represent $2,4-dimethyl-3-pentanone$ ?

A skeletal formula

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Verified step by step guidance

Identify the parent chain: The name '2,4-dimethyl-3-pentanone' indicates that the parent chain is a pentanone, which means it is a five-carbon chain with a ketone group.

Locate the ketone group: The '3-pentanone' part of the name specifies that the ketone group (C=O) is on the third carbon of the chain.

Identify the methyl groups: The '2,4-dimethyl' part of the name indicates that there are methyl groups (CH₃) attached to the second and fourth carbons of the parent chain.

Analyze the structures: Examine each provided structure to see which one has a five-carbon chain with a ketone group on the third carbon and methyl groups on the second and fourth carbons.

Select the correct structure: Choose the structure that matches the description of 2,4-dimethyl-3-pentanone, ensuring the positions of the ketone and methyl groups are correct.