The specific rotation of a pure enantiomer is `+16^(@)` its observed rotation if it is isolated from a reaction with 25% racemisation and 75% retention is,
A
`-12^(@)`
B
`+12^(@)`
C
`+16^(@)`
D
`-16^(@)`
Text Solution
Verified by Experts
The correct Answer is:
B
% enantiomeric excess `=("observed specific rotation")/("Specific ration of pure enantiomer")xx100` observed specific rotation`=(3//4)/(100)xx(+16^(@))xx100=+12^(@)`
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