Bromination of Alkene: Trans or Cis?

[desmond iking]

Homework Statement

for the bromination of alkene, different sources give different structure of product which is trans(from wikipedia) , but the book is cis. which is correct?

Homework Equations

The Attempt at a Solution

please don't delete my question.. as i really don't know which site should i post. as this is not homework but the notes is from textbook.

 

[Saitama]

Homework Statement

for the bromination of alkene, different sources give different structure of product which is trans(from wikipedia) , but the book is cis. which is correct?

Homework Equations

The Attempt at a Solution

please don't delete my question.. as i really don't know which site should i post. as this is not homework but the notes is from textbook.

Can you share the name of the book? I don't think the book has got it right. The mechanism is correctly presented by wiki.

 

[Borek]

For 1,2-dibromoethane it doesn't matter, final structure is correct. It is a lousy approach as it leaves an important information out, but I would not say book is incorrect.