November 01, 2024, 01:26:51 AM
Forum Rules: Read This Before Posting


Topic: HYDROHALOGENATION  (Read 4465 times)

0 Members and 2 Guests are viewing this topic.

Offline Rishi

  • Regular Member
  • ***
  • Posts: 48
  • Mole Snacks: +0/-5
HYDROHALOGENATION
« on: April 09, 2009, 05:58:22 AM »
The hydrohalogenation of alkenes occur by the Markonikov and Anti-markonikov's rule.
To carry out the reaction efficiently, one needs to purge the Hydrogen halide gas in the alkene.
Can someone explain why the hydrohalogenation is not possible with aqueous Hydrogen halide solution ?

Offline sjb

  • Global Moderator
  • Sr. Member
  • ***
  • Posts: 3653
  • Mole Snacks: +222/-42
  • Gender: Male
Re: HYDROHALOGENATION
« Reply #1 on: April 09, 2009, 06:02:37 AM »
What's the mechanism of the reaction? Is there anything else in your solution that may interfere?

Offline Rishi

  • Regular Member
  • ***
  • Posts: 48
  • Mole Snacks: +0/-5
Re: HYDROHALOGENATION
« Reply #2 on: April 09, 2009, 07:01:07 AM »
Well it has nothing but the alkene.
I tried to add a phase transfer catalyst to ensure the hydrohalogenation with aqueous acid since the alkene is insoluble in water.

Offline lutesium

  • Full Member
  • ****
  • Posts: 304
  • Mole Snacks: +8/-24
Re: HYDROHALOGENATION
« Reply #3 on: April 09, 2009, 07:59:27 AM »
To carry out the reaction efficiently, one needs to purge the Hydrogen halide gas in the alkene.
Can someone explain why the hydrohalogenation is not possible with aqueous Hydrogen halide solution ?


Its possibly due to the Hydration of Alkene forming an Alcohol.

Lutesium... 

Offline Rishi

  • Regular Member
  • ***
  • Posts: 48
  • Mole Snacks: +0/-5
Re: HYDROHALOGENATION
« Reply #4 on: April 20, 2009, 04:36:09 AM »
Possible.....but then I am getting products other than the alcohol and the chloride. A couple of more peaks show on the GC reparts. Any idea what they could be ?

Sponsored Links