Bromination of Alkene: Trans or Cis?

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SUMMARY

The discussion centers on the bromination of alkenes, specifically the formation of 1,2-dibromoethane. While Wikipedia states that the product is trans, a textbook claims it is cis. The consensus among participants is that the mechanism presented by Wikipedia is accurate, and the final structure of 1,2-dibromoethane is indeed correct regardless of the stereochemistry. However, the textbook's assertion is not entirely incorrect, as it omits critical information about the reaction mechanism.

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  • Understanding of alkene bromination mechanisms
  • Familiarity with stereochemistry concepts (cis/trans isomerism)
  • Knowledge of 1,2-dibromoethane structure and properties
  • Basic organic chemistry principles
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  • Study the mechanism of alkene bromination in detail
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Chemistry students, organic chemists, and educators seeking clarity on alkene bromination and stereochemical outcomes.

desmond iking
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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.
 

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desmond iking said:

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.
 
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.
 

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