Topic: What would the diagram of cis -1,2 - dibromoethylene look like? (Read 2430 times)

moe6141 · « **on:** November 10, 2011, 02:34:11 AM »

how would it look like and how can i convert itto trans -1,2- dibromoethylene

Telamond · « **Reply #1 on:** November 10, 2011, 03:38:33 AM »

You need to reduce the olefin so that you can have free bond rotation, then remake the double bond. You usually can do this kind of stereoisomerization with photolysis.

You can check this wikipedia page out.
http://en.wikipedia.org/wiki/Isomerisation

discodermolide · « **Reply #2 on:** November 10, 2011, 05:31:03 AM »

Quote from: moe6141 on November 10, 2011, 02:34:11 AM

how would it look like and how can i convert itto trans -1,2- dibromoethylene

I would add bromine across the double bond and then eliminate HBr with a strong base to get the trans compound.

orgopete · « **Reply #3 on:** November 10, 2011, 03:19:57 PM »

Quote from: moe6141 on November 10, 2011, 02:34:11 AM

how would it look like and how can i convert itto trans -1,2- dibromoethylene

What chemistry was discussed in class (I didn't attend)? Was photochemical isomerization or chemical isomerization discussed?

Topic: What would the diagram of cis -1,2 - dibromoethylene look like? (Read 2430 times)

moe6141

What would the diagram of cis -1,2 - dibromoethylene look like?

Telamond

Re: What would the diagram of cis -1,2 - dibromoethylene look like?

discodermolide

Re: What would the diagram of cis -1,2 - dibromoethylene look like?

orgopete

Re: What would the diagram of cis -1,2 - dibromoethylene look like?

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