Optical Isomerism: Enantiomeric Excess Calculation from -13.9 Degrees

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Discussion Overview

The discussion revolves around calculating the enantiomeric excess of a synthetic camphor sample based on its specific rotation of -13.9 degrees. Participants explore the necessary information and steps required to solve the problem, which is framed as a homework question.

Discussion Character

  • Homework-related, Exploratory

Main Points Raised

  • One participant notes that the optical rotation must be provided to solve the problem, indicating uncertainty about the information given.
  • Another participant agrees that the question lacks sufficient information for a complete solution.
  • A different participant suggests that finding the specific rotation of pure R or S camphor might be necessary, recommending resources like the CRC Handbook or Wikipedia for this information.
  • A later reply questions whether this level of detail is expected at the JEE level, implying a consideration of the educational context.

Areas of Agreement / Disagreement

Participants generally agree that the problem lacks necessary information, but there is no consensus on how to proceed or whether additional calculations are expected.

Contextual Notes

Participants express uncertainty regarding the requirement of specific rotation values for pure isomers, which are not provided in the initial question.

NEILS BOHR
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Homework Statement


A sample of synthetic camphor contains both the d and l isomers in unequal amounts . The specific rotation of the sample is found to be -13.9 degrees . What is the enantiomeric excess of the sample?

(A) 0.215

(B) 0.314

(C) 0.417

(D) 0.167

pleasez xplain ur working as well!


Homework Equations





The Attempt at a Solution



i think the optical rotation has to be provided . without it i can't think of how to solve it??
 
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I too think that the question is lacking some info.
 
... unless your teacher actually expects you to do a little work and find the specific rotation of pure R or S camphor. Try the CRC Handbook. Even Wiki has it!
 
seeing ur reply makes me think whether this is reqd at JEE level??:-p
 

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