Results are out! Find what you need...fast. Get quick advice or join the chat
Hey! Sign in to get help with your study questionsNew here? Join for free to post

Naming things with: Methyl and Ethyl whats the difference?

Announcements Posted on
  1. Offline

    ReputationRep:
    ok, so when naming hydrocarbons, how do you know when to put methyl and when to put ethyl?
    I've been told that ethyl is one CH3 group...

    what do u put when there are two CH3's coming off one C atom, but on different 'sides'.
    and what do you put when there are two CH3's joined together coming off a C atom??

    thanks
  2. Offline

    ReputationRep:
    methy= 1 ch3 group
    dimethyl= 2 ch3 groups on same C
    ethyl= c2h5 group

    methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl

    Am I right?
  3. Offline

    Methyl=1 carbon chain branched off the parent alkane
    Ethyl = 2 carbon chain branched off the parent alkane

    If 2 methyl groups are presnet on different positions its di-methyl
  4. Offline

    ReputationRep:
    ch3 means methyl, even if there are 2 of them. c2h5 means ethyl.
  5. Offline

    (Original post by Holdo24)
    methy= 1 ch3 group
    dimethyl= 2 ch3 groups on same C
    ethyl= c2h5 group

    methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl

    Am I right?
    Yes
  6. Offline

    ReputationRep:
    (Original post by raspberryice)
    ok, so when naming hydrocarbons, how do you know when to put methyl and when to put ethyl?
    I've been told that ethyl is one CH3 group...

    what do u put when there are two CH3's coming off one C atom, but on different 'sides'.
    and what do you put when there are two CH3's joined together coming off a C atom??

    thanks
    Methyl is just one CH3 group.
    Ethyl is a -CH2-CH3 group.

    If you have 2 CH3s coming off one carbon (ie 2 methyl groups) you number the carbon and then use that number twice, for example

    2,2-dimethylhexane.

    Would have 2 methyl groups on the second carbon along.

    "and what do you put when there are two CH3's joined together coming off a C atom??"

    I'm not sure what you mean by that?
  7. Offline

    ReputationRep:
    (Original post by Loz17)
    Yes
    Thankyou. (crashing Higher chemistry this year)
  8. Offline

    (Original post by Holdo24)
    Thankyou. (crashing Higher chemistry this year)
    Hehe

    I'm failing A2 chemistry this year :p:

    OP what you mean by "and what do you put when there are two CH3's joined together coming off a C atom??"??

    Please expand
  9. Offline

    ReputationRep:
    (Original post by Loz17)
    Hehe

    I'm failing A2 chemistry this year :p:

    OP what you mean by "and what do you put when there are two CH3's joined together coming off a C atom??"??

    Please expand
    I meant 1 CH2, then CH3 in one branch. (attached to each other) sorry.
  10. Offline

    ReputationRep:
    (Original post by raspberryice)
    I meant 1 CH2, then CH3 in one branch. (attached to each other) sorry.
     R-CH_2CH_3 = Ethyl group
     R-CH_3 = Methyl group
  11. Offline

    ReputationRep:
    (Original post by Adhavan)
     R-CH_2CH_3 = Ethyl group
     R-CH_3 = Methyl group
    thanks....i'm nearly there...

    soo
    what is this?


    4-ethyl 3-methylhexane??
  12. Offline

    ReputationRep:
    (Original post by raspberryice)
    4-ethyl 3-methylhexane??
    Nearly: 3-ethyl-4-methylhexane
  13. Offline

    ReputationRep:
    (Original post by raspberryice)
    thanks....i'm nearly there...

    soo
    what is this?


    4-ethyl 3-methylhexane??
    :yep:

    or 3-ethyl4-methylhexane (i think you're supposed to list them in alphabetical/number order but i don't think it matters that much at this stage)
  14. Offline

    ReputationRep:
    (Original post by EierVonSatan)
    Nearly: 3-ethyl-4-methylhexane
    ah right thanks, so you go from the other end, because the ethyl is longer?

    also, when u hav a cyclic hydrocarbon, and only one ethyl (CH2-CH3) thingy coming off it, how do u number it?

    thanks a bunch everyone!
  15. Offline

    ReputationRep:
    (Original post by raspberryice)
    ah right thanks, so you go from the other end, because the ethyl is longer?
    No it's because it has to be alphabetical order ethyl before methyl

    also, when u hav a cyclic hydrocarbon, and only one ethyl (CH2-CH3) thingy coming off it, how do u number it?
    If there is only one, it doesn't need a number
  16. Offline

    ReputationRep:
    (Original post by EierVonSatan)
    No it's because it has to be alphabetical order ethyl before methyl



    If there is only one, it doesn't need a number
    thank uuu

    Something strange about chem..it can b hard at times, but i still enjoy it!
    weird...
  17. Offline

    ReputationRep:
    (Original post by raspberryice)
    ok..
    thank uuu

    Something strange about chem..it can b hard at times, but i still enjoy it!
    weird...
    yeah, I have the same thoughts now :p:
  18. Offline

    ReputationRep:
    (Original post by EierVonSatan)
    yeah, I have the same thoughts now :p:
    eggs of...... satan......

    this one is also an egg of satan
  19. Offline

    ReputationRep:
    (Original post by Oracle_163)
    eggs of...... satan......

    this one is also an egg of satan
    :lolwut:
  20. Offline

    ReputationRep:
    (Original post by Oracle_163)
    eggs of...... satan......

    this one is also an egg of satan
    urr...if u say so. :confused:

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide to join now Processing…

Updated: February 1, 2009
New on TSR

Your TSR exam season toolkit

Everything you need to know about study help on TSR

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