Addition of br 2 diols and cleavage of a double bond
Download
1 / 16

Addition of Br 2 , Diols, and Cleavage of a double bond - PowerPoint PPT Presentation


  • 105 Views
  • Uploaded on
  • Presentation posted in: General

Addition of Br 2 , Diols, and Cleavage of a double bond. Addition of Bromine. Bromine adds across a double bond in a trans- fashion. Creates a “bromonium” ion as an intermediate with two bonds to two different carbons, one longer than the other. Mechanism (Addition of Br 2 ).

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha

Download Presentation

Addition of Br 2 , Diols, and Cleavage of a double bond

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Addition of Br2, Diols, and Cleavage of a double bond


Addition of Bromine

Bromine adds across a double bond in a trans-fashion.

Creates a “bromonium” ion as an intermediate with two bonds to two different carbons, one longer than the other.


Mechanism (Addition of Br2)


Addition of a cis-diol

A cis-diol is a diol where both –OH groups are pointing in the same direction.

There are two ways to create a diol, with either osmium tetroxide (OsO4) or cold, dilute permangante (KMnO4).


Cis-Diols


Cleavage of Double Bond

Double bonds are cleaved by either warm, concentrated KMnO4 and Ozone (O3).

The ends are left as either ketones, aldehydes or carboxylic acids.


Double Bond Cleavage

  • Note that in cyclic alkenes, the bond breaks and turns into a straight chain aldehyde and ketone.


What is the product of the following reaction?


Incorrect

Try Again


Correct!


What is the product of the following reaction?


Incorrect

Try Again


Correct!


What is the product of the following reaction?


Incorrect

Try Again


Correct!


ad
  • Login