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giving the product in 97% in enantiomeric excess

English translation: in 97% enantiomeric excess

09:57 Feb 17, 2007
English language (monolingual) [PRO]
Science - Chemistry; Chem Sci/Eng
English term or phrase: giving the product in 97% in enantiomeric excess
The text is a patent application on an enantiomeric synthesis method.

"The reaction proceeds within 5 minutes giving the (R)-alcohol in 97% in enantiomeric excess."

Would you say that the figure 97% refers to the total yield or to the enantiomeric excess?
Karin and Folke Nettelblad (Folia Textproduktion HB)
Sweden
Local time: 00:55
Selected answer:in 97% enantiomeric excess
Explanation:
Althiugh the phraee has an error, I would say they are referring to the level of enantimeric excess, not the overall yield.

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Note added at 8 mins (2007-02-17 10:05:29 GMT)
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Therefore the percentage term refers to the enantiomeric excess (97% - R) and not rhe yield of the racemic mixture.

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Note added at 9 mins (2007-02-17 10:06:21 GMT)
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Typos seem to be in fashion today!!!
Selected response from:

achisholm
United Kingdom
Local time: 23:55
Grading comment
Thanks! That's what I thought, but I wanted to eliminate any doubt.
4 KudoZ points were awarded for this answer



SUMMARY OF ALL EXPLANATIONS PROVIDED
5 +3in 97% enantiomeric excess
achisholm


  

Answers


5 mins   confidence: Answerer confidence 5/5 peer agreement (net): +3
in 97% enantiomeric excess


Explanation:
Althiugh the phraee has an error, I would say they are referring to the level of enantimeric excess, not the overall yield.

--------------------------------------------------
Note added at 8 mins (2007-02-17 10:05:29 GMT)
--------------------------------------------------

Therefore the percentage term refers to the enantiomeric excess (97% - R) and not rhe yield of the racemic mixture.

--------------------------------------------------
Note added at 9 mins (2007-02-17 10:06:21 GMT)
--------------------------------------------------

Typos seem to be in fashion today!!!

achisholm
United Kingdom
Local time: 23:55
Meets criteria
Specializes in field
Native speaker of: English
PRO pts in category: 32
Grading comment
Thanks! That's what I thought, but I wanted to eliminate any doubt.

Peer comments on this answer (and responses from the answerer)
agree  Richard Benham: O srr ypi nrvrt mkae tpyos!
1 min
agree  Dr. Andrew Frankland: Or simply 97% ee. Any chemist would understand that
2 hrs
  -> agree
agree  Gillian Scheibelein: Wikipedia explains it nicely: http://en.wikipedia.org/wiki/Enantiomeric_excess
4 hrs
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