Anti or Syn

As the demercuration step involves radical reactions, the stereochemistry of this reaction is scrambled. It undergoes overall syn as well as overall anti addition.
The oxymercuration step is syn, though. But after demercuration, both anti and syn products are obtained.

@ pritish
why... the cyclic intermediate formed after oxymercuration will be attacked from the opp side by water....so shouldn't it be anti???????

oh ya oxymercuration is anti....mercurinium bridged ion is formed which is attacked by water in S_N2 type reaction(backside) leading to anti product...overall products are still syn and anti however!
thanks rickde :)

yeah Rickde is correct, i totally agree wid him

thanks guys [1]

ya i also think rickde is right

@ Deepanshu even if d substrate was trans d addition wud b same bt products wll b different
like wen der is anti addition wid d trans alkene d products formed r meso &
wen der is syn addition is der wid trans alkene d product formed is racemic

remember dis
cis alkene + syn addition = product is meso
cis alkene + anti addition = product is racemic
trans alkene + syn addition = product is racemic
trans alkene + anti addition = product is meso

@ parjanya
lady i knw tht
bt wt i ve heard is tht hydroboration exclusively gives syn addition product....
olso u wont get any meso products here ....

so i guess answrs here shud be d same bt i m nt sure

btw i lykd ur punchlyn......! awesum