A sample of optically active alochol has a specific ratation, [alpha]_(D)^(25), equalto +1.51^(@). a. What is the percentage enantiomeric excess of the sample? b. Which enantiomer is in excess, (R ) or (S)?

A sample of optically active alochol has a specific ratation, [alpha]_

1.	A sample of optically active alochol has a specific ratation, [alpha]_(D)^(25), equalto +1.51^(@). a. What is the percentage enantiomeric excess of the sample? b. Which enantiomer is in excess, (R ) or (S)?
Answer» <html><body><p></p>Solution :a. Enantiomeric excess `= ("<a href="https://interviewquestions.tuteehub.com/tag/observed-582965" style="font-weight:bold;" target="_blank" title="Click to know more about OBSERVED">OBSERVED</a> rotation")/("Specific rotation of <a href="https://interviewquestions.tuteehub.com/tag/pure-1172806" style="font-weight:bold;" target="_blank" title="Click to know more about PURE">PURE</a> enantiomer")<a href="https://interviewquestions.tuteehub.com/tag/xx100-3292680" style="font-weight:bold;" target="_blank" title="Click to know more about XX100">XX100</a>` <br/> `=(+1.151^(@))/(+5.756^(@))xx100= 20.00%` <br/> <a href="https://interviewquestions.tuteehub.com/tag/b-387190" style="font-weight:bold;" target="_blank" title="Click to know more about B">B</a>. Since the (<a href="https://interviewquestions.tuteehub.com/tag/r-611811" style="font-weight:bold;" target="_blank" title="Click to know more about R">R</a> ) enantiomer is `(+)`-from, it is present in excess</body></html>