Problem: Answer the questions about the molecule. What is the highest priority group?a) -CH2CH2CH2CH3b) -CH2CH2CH3c) -cyclo(C5H9)d) -HWhat is the lowest priority group? a) -CH2CH2CH2CH3b) -CH2CH2CH3c) -cyclo(C5H9)d) -HName the structure.a) (R)-4-cyclopentyloctaneb) (S)-4-cyclopentyloctane

FREE Expert Solution

We are asked to identify the prioritization of the groups in the chiral center and to name the structure. 


First, we convert the structure to the bond-line to easily see the groups.



We can see that this is a chiral molecule because:

– there is no plane of symmetry present

– there is a chiral center present


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Problem Details

Answer the questions about the molecule. 

What is the highest priority group?

a) -CH2CH2CH2CH3

b) -CH2CH2CH3

c) -cyclo(C5H9)

d) -H

What is the lowest priority group? 

a) -CH2CH2CH2CH3

b) -CH2CH2CH3

c) -cyclo(C5H9)

d) -H

Name the structure.

a) (R)-4-cyclopentyloctane

b) (S)-4-cyclopentyloctane

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the R and S Configuration concept. You can view video lessons to learn R and S Configuration. Or if you need more R and S Configuration practice, you can also practice R and S Configuration practice problems.