Turn on thread page Beta
    • Thread Starter
    Offline

    16
    ReputationRep:
    Name:  1477517950632336308643.jpg
Views: 40
Size:  404.9 KB can anyone explain if I got this right and also where the oh group in the middle of the compound is from ? Thanks
    Offline

    10
    ReputationRep:
    (Original post by coconut64)
    Name:  1477517950632336308643.jpg
Views: 40
Size:  404.9 KB can anyone explain if I got this right and also where the oh group in the middle of the compound is from ? Thanks
    Yep that's right, hydrolysing an ester in acidic conditions leads to a carboxylic acid and an alcohol. In this case you have a lactone (the name for an ester in a ring) so the acid (on the right hand side) and the alcohol (in the middle) are still attached to one another
    • Thread Starter
    Offline

    16
    ReputationRep:
    (Original post by MexicanKeith)
    Yep that's right, hydrolysing an ester in acidic conditions leads to a carboxylic acid and an alcohol. In this case you have a lactone (the name for an ester in a ring) so the acid (on the right hand side) and the alcohol (in the middle) are still attached to one another
    Thanks for the help. Why isn't the alcohol formed separately, why does it still attach to the ring?
    Offline

    11
    ReputationRep:
    (Original post by coconut64)
    Thanks for the help. Why isn't the alcohol formed separately, why does it still attach to the ring?
    draw and see

    a straight chain with opposing ends containing one -cooh on one end and -oh on the other can self cyclise to form cyclic estee. this is the opposite.

    also, 2 x such di functional group compounds can cyclise with each other to give cyclic diester.
    ie 2 xhydrolysis of such esters give two molecules but prob proceed stepwise giving one molecule first (still with 1 ester).

    my advice is draw and see. find the C-O ester, break, draw, recheck going forward.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: October 31, 2016
The home of Results and Clearing

2,495

people online now

1,567,000

students helped last year

University open days

  1. Sheffield Hallam University
    City Campus Undergraduate
    Tue, 21 Aug '18
  2. Bournemouth University
    Clearing Open Day Undergraduate
    Wed, 22 Aug '18
  3. University of Buckingham
    Postgraduate Open Evening Postgraduate
    Thu, 23 Aug '18
Poll
A-level students - how do you feel about your results?

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

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