BR Question Number 3.10

[Dochopeful13]

Can someone please tell why 1,1,3,3-tetramethyl-2-propanone is supposedly named incorrectly?

Thank you!

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[Mcat_hokage]

If it is 1,1,3,3 tetra methyl. You should count the longest carbon chain then. First carbon has has two methyl and third carbon has two methyl. Including thst middle carbon. The longest chain should be a 5 carbon chain . Should be 1,3 dimethyl. Hope that makes sense

 

[Dochopeful13]

If it is 1,1,3,3 tetra methyl. You should count the longest carbon chain then. First carbon has has two methyl and third carbon has two methyl. Including thst middle carbon. The longest chain should be a 5 carbon chain . Should be 1,3 dimethyl. Hope that makes sense

Thank you for your help!

 

[BerkReviewTeach]

The actual name for something errantly called 1,1,3,3-tetramethyl-2-propanone would actually be 2,4-dimethyl-3-pentanone.

 

[Mcat_hokage]

The actual name for something errantly called 1,1,3,3-tetramethyl-2-propanone would actually be 2,4-dimethyl-3-pentanone.

Correct. It should be 2,4 and not 1,3 since it's a pentane now.