November 28, 2024, 11:52:36 PM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Steps in mechanism.  (Read 2084 times)

0 Members and 1 Guest are viewing this topic.

Offline noor123

  • Regular Member
  • ***
  • Posts: 54
  • Mole Snacks: +0/-0
Steps in mechanism.
« on: September 21, 2014, 03:23:57 PM »
So i have attached the reaction mechanism of the reaction, can anyone please explain what is going on in the red marked steps?  How can the negative charge go down like that and make a bridge?  I can recall about learning about the Cl and Br bridges but not Oxygen... :S  what is this type of reaction called?



Logged

Offline discodermolide

  • Chemist
  • Sr. Member
  • *
  • Posts: 5038
  • Mole Snacks: +405/-70
  • Gender: Male
    • My research history
Re: Steps in mechanism.
« Reply #1 on: September 21, 2014, 03:27:02 PM »
Look up the formation and reactions of epoxides.
Logged
Development Chemists do it on Scale, Research Chemists just do it!
My Research History

Offline Dan

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 4716
  • Mole Snacks: +469/-72
  • Gender: Male
  • Organic Chemist
    • My research
Re: Steps in mechanism.
« Reply #2 on: September 21, 2014, 05:21:34 PM »
Are you comfortable with the mechanism of SN2 reactions?
Logged
My research: Google Scholar and Researchgate

Offline wildfyr

  • Global Moderator
  • Sr. Member
  • ***
  • Posts: 1776
  • Mole Snacks: +203/-10
Re: Steps in mechanism.
« Reply #3 on: September 21, 2014, 09:45:59 PM »
A O- is a fairly good nucleophile, it can react intramolecularly pretty easily. Those Br+ and Cl+ ring structurs are actually highly unstable, in this case the epoxide is actually quite stable.

On a related note, I wonder why they used KH instead of the more conventional NaH.
« Last Edit: September 21, 2014, 10:54:58 PM by wildfyr »
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links