Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    16
    ReputationRep:
    This is the structure:
    CH3C=OCH3, this is propanone. Why does it have 'propan' with it when there's a double bond, shouldn't it have 'ene' in somewhere? Why is there no number to indicate where the double bond is? I think it'd make more sense if it was prop-2-ene-one or something.
    • Community Assistant
    • Study Helper
    Offline

    14
    ReputationRep:
    (Original post by Magenta96)
    This is the structure:
    CH3C=OCH3, this is propanone. Why does it have 'propan' with it when there's a double bond, shouldn't it have 'ene' in somewhere? Why is there no number to indicate where the double bond is? I think it'd make more sense if it was prop-2-ene-one or something.
    It doesn't have a double bond between two carbon atoms (the requirement for an alkene), it has a carbonyl group, C=O.

    The longest chain is three carbons = prop-
    The functional group = carbonyl (in the middle of the chain), suffix -anone.

    The name is propanone

    You might like to take a look at this interactive on organic homologous series
    Offline

    0
    ReputationRep:
    (Original post by Magenta96)
    This is the structure:
    CH3C=OCH3, this is propanone. Why does it have 'propan' with it when there's a double bond, shouldn't it have 'ene' in somewhere? Why is there no number to indicate where the double bond is? I think it'd make more sense if it was prop-2-ene-one or something.
    Ketones have a C=O group and end in the suffix -one.

    3 Carbons = propan so overall, propanone.

    The reason there is no number is because the middle is the only position the C=O bond could be in for it to be a ketone. If it was on the first or third carbon it would be an aldehyde instead.

    Posted from TSR Mobile
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Are unpaid trial work shifts fair?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.