Enantiomeric Excess

Q. The enantiomeric excess of a sample is a measure of its optical purity -True or False?

1. False
2. True

Q. Determine CIP priorities for the following compound -

1. $-C{H}_{2}C{H}_{2}C{H}_3$> $-CH(C{H}_3{)}_2$ > H > D
2. $-CH(C{H}_3{)}_2$ > $-C{H}_{2}C{H}_{2}C{H}_3$ > - D > - H
3. D > H > $-C{H}_{2}C{H}_{2}C{H}_3$> $-CH(C{H}_3{)}_2$
4. $-C{H}_{2}C{H}_{2}C{H}_3$> $-CH(C{H}_3{)}_2$ > D > H

Q. Figure out the R - S nomenclature for the following compound. Type R or S as your answer.___

Q. The enantiomeric excess of a racemic mixture is ___?

Q. Match the following with their units when required to be substituted in the formula to find specific rotation.

1. decimetre
2. degree
3. g/ml

Q. A beaker contains two enantiomers of a compound as shown below, when a light is passed through beaker it shows the following result:


Then the correct statement is:

1. R and S is present in the same fraction
2. Compound shows optical activity because of enantiomeric excess
3. Compound shows optical inactivity because of enantiomeric excess
4. Compound shows optical inactivity because of external compensation

Q. Match the following with their units when required to be substituted in the formula to find specific rotation.

1. decimetre
2. degree
3. g/ml

Q. Figure out the R - S nomenclature for the following compound. Type R or S as your answer.___

Q. The enantiomeric excess of a sample is a measure of its optical purity -True or False?

1. True
2. False

Q. A beaker contains two enantiomers of a compound as shown below, when a light is passed through beaker it shows the following result:


Then the correct statement is:

1. R and S is present in the same fraction
2. Compound shows optical activity because of enantiomeric excess
3. Compound shows optical inactivity because of enantiomeric excess
4. Compound shows optical inactivity because of external compensation