Cl2 in CCl4

[jdent]

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Cl2 in CCl4 (carbon tetrachloride) adds syn or trans?
In an alkene it doesn't really matter. I think that it matters by a alkyne where you are using only 1 mole of Cl2
Anyone?

 

[klutzy1987]

When adding to an alkyne it adds in anti. When adding to an alkene it makes a difference in stereochemistry i.e.(r/s)

 

[jdent]

I knew I could rely on you for an answer, thanks!

 

[harrygt]

When adding to an alkyne it adds in anti. When adding to an alkene it makes a difference in stereochemistry i.e.(r/s)

Actually during the addition of Cl2 or Br2 to an alkyne, the Cl or Br bridge does not form, therefore you get both syn and anti addition.

Br2 and Cl2 add anti to a double bond, and that makes a difference in the stereochemistry as the previous poster mentioned.