HgSO4 / H2SO4, does it add syn or anti?

[STACM]

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Anyone?

 

[harrygt]

Anyone?

The Hg2+ ion makes a bridge on the double bond which results in the anti addition of water.

 

[mddang]

Huh? Are you talking about hydration of an alkyne??

If it's a terminal alkyne, you'll get a ketone.. If it's an internal alkyne, you're going to have a mixture of ketones.


If you're talking about oxymercuration/demercuration (Hg(OAc)2/H2O, then NaBH4), then it's anti.