1. Dismiss Notice
  2. Hey Guest! Check out the 3 MCAT Study Plan Options listed in the 'stickies' area at the top of the forums (BoomBoom, SN2ed, and MCATJelly). Let us know which you like best.

    Also, we now offer a MCAT Test-Prep Exhibitions Forum where you can ask questions directly from the test-prep services.
    Dismiss Notice
  3. This forum is for support and discussion only. Please promote test prep materials/services (including AMAs) in the Special Offers subforum only. Thanks!
    Dismiss Notice
Dismiss Notice

Interview Feedback: Visit Interview Feedback to view and submit interview information.

Interviewing Masterclass: Free masterclass on interviewing from SDN and Medical College of Georgia

malic acid passage - organic passage - CK/DK

Discussion in 'MCAT: Medical College Admissions Test' started by pateltr1, Apr 20, 2004.

  1. pateltr1

    pateltr1 Member
    5+ Year Member

    Joined:
    Apr 19, 2004
    Messages:
    48
    Likes Received:
    0
    what was the answer to first question in this passage?

    which one of following does NOT belong(something)?

    a. tertiary carbon is faster than something something crap....
    b. don't remember, but wasn't the answer
    c. intermediate is carbo cation.
    d. don't remember, but wasn't the answer
     
  2. Nuel

    10+ Year Member

    Joined:
    Mar 8, 2003
    Messages:
    2,991
    Likes Received:
    1
    I think it was an E2. Did i put A? I think I did.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  3. pateltr1

    pateltr1 Member
    5+ Year Member

    Joined:
    Apr 19, 2004
    Messages:
    48
    Likes Received:
    0
    If it was E2, then it would not form carbocation right? Also, tertinary would be slower compared to secondary/primary(steric)?

    I don't know if it was actually E2 though.

    P.S. I do not know much organic/bio(Computer Science major), so sorry if above statement is incorrect.
     
  4. ASDIC

    ASDIC The 9th Flotilla
    15+ Year Member

    Joined:
    Apr 7, 2003
    Messages:
    961
    Likes Received:
    5
    Status:
    Medical Student
    yes an E2 reaction is a concerted reaction with no carbocation intermediate. It only runs for primary and secondary carbo-compounds
     
  5. IcedCube

    IcedCube Senior Member
    5+ Year Member

    Joined:
    Apr 18, 2004
    Messages:
    121
    Likes Received:
    0
    tertiary and carbocation doesnt seem to work, since both describe E1.
     
  6. benzino

    benzino Junior Member
    7+ Year Member

    Joined:
    Mar 1, 2004
    Messages:
    20
    Likes Received:
    0
    how were we supposed to tell that it was an E2 reaction? i think i eliminated both tertiary and carbocation because they both describe E1, but i don't remember all too well... :(
     
  7. pateltr1

    pateltr1 Member
    5+ Year Member

    Joined:
    Apr 19, 2004
    Messages:
    48
    Likes Received:
    0

    May be answer was neither of those. Anyone put something else?

    My brain was had a fetal error after the mcat, and memory was wiped, so I can't remember anything else.
     
  8. rugbyboy

    rugbyboy Member
    7+ Year Member

    Joined:
    Sep 27, 2003
    Messages:
    42
    Likes Received:
    0
    I remember this question, I chose C. The reaction was E1. I remembered it was not stated anywhere in the passage what type of reaction it was, but since the products were two stereo-isomers ( cis and trans ) it had to be E1 and that involves a carbo cation. I can't remember what the question was but one of the other answer choices was

    d) it is stereo ( regional ) specific.

    Any thoughts?
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  9. pateltr1

    pateltr1 Member
    5+ Year Member

    Joined:
    Apr 19, 2004
    Messages:
    48
    Likes Received:
    0

    if it was E1, then answer would be D. It is not stereospecific after you form carbocation right? you get mixture of both.
     
  10. IcedCube

    IcedCube Senior Member
    5+ Year Member

    Joined:
    Apr 18, 2004
    Messages:
    121
    Likes Received:
    0
    yup it must be stereoselective if its product trends are Cis AND Trans. it may or may not have been stereospecific, depending if there were any bulky substituents...i forget though
     

Share This Page