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ADNAN MUHAMMED

Grade 12,

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How many diastereomers are present in 2-bromo-3-chlorobutane??

How many diastereomers are present in 2-bromo-3-chlorobutane??

Grade:6

2 Answers

Arun
25750 Points
4 years ago
Molecules with 2 or more Chiral Atoms For example, 2-bromo-3-chlorobutane.
  This can exist in 4 possible stereoisomers.
(2S, 3R), (2R, 3S), (2S, 3S) and (2R, 3R).
The (2S, 3R) and (2R, 3S) are enantiomers.
The (2S, 3S) and (2R, 3R) are enantiomers.
We can also say (2S, 3R) is a diastereomer of (2S, 3S) and (2R, 3R), and (2S, 3S) is a diastereomer of (2S, 3R) and (2R, 3S).
 
Vikas TU
14149 Points
4 years ago
A molecule can have up to  2^n stereoisomers where n is the number of chiral centers. They are all stereoisomers as long none of the molecules are mirror images of each other. 2-bromo-3-chlorobutane have 2 stereoisomers on carbon 2 and 3. 2^2 is 4, therefore the 2-bromo-3-chlorobutane can have up to 4 stereoisomers. Since all of the potential molecules are unique and are not mirror images of any of the other arrangements, they are all considere stereoisomers.

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