Naming Alkanes Help?

I have been stuck on this for a bit now. I thought it should be 2-methyl-4propyldecane but mastering chemistry keeps telling me I'm wrong. Any suggestions?

Update:

i meant to put a dash in between 4-propyl

Update 2:

I figured it out finally! It was 4-isopropyl-2-methyldecane

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2 Answers

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  • 4 weeks ago

    The use of the term iso- is not permitted in systematic naming. The problem is the group attached to C4 of the decane chain.

    How would you name this if the CH3 side group was not attached - ie you had only a CH2-CH3 group on C4

     I suggest: 4-ethyl-2-methyldecane ( the side groups are in alpha order)

    Now you have to add the methyl group to C2 of the ethyl group on C4 of the decane chain :

    My final suggestion:

    2-methyl-4-ethyl-2-methyldecane.

  • 4 weeks ago

    we all know iso is not systematic but I dont think your idea of 4-ethyl-2-methyl works either

    We need brackets to show the ethyl-2-methyl is attached at 4

    so how about 2-methyl-4-(ethyl-2-methyl)decane.?

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