It is known that the addition of bromine to a double bond occurs with anti stereochemistry. [VISUAL] — Physical Chemistry Chemistry Question
Stereochemistry of the Addition Reactions to Alkenes
It is known that the addition of bromine to a double bond occurs with anti stereochemistry.
[VISUAL]
Write the products of bromination fοr the following alkenes, using Fischer projections.
[VISUAL]
Model Answer
The bromination of alkenes containing pre-existing stereocenters with anti-stereochemistry yields specific diastereomeric products. The Fischer projections of the products for alkenes a), b), c), and d) are shown in the visual solution.
Indicate if the products are optically active.
Model Answer
Based on the symmetry of the resulting diastereomers, the optical activity of the products is as follows:
a) One product is a meso compound (not optically active, labeled 'No'), and the other is optically active (labeled 'Yes').
b) One product is a meso compound (not optically active, labeled 'No'), and the other is optically active (labeled 'Yes').
c) Both products are optically active (labeled 'Yes' and 'Yes').
d) Neither product is optically active because both diastereomers are meso compounds (labeled 'No' and 'No').