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Problem set 5-2 - (b Which enantiomer is in excess(R or(S...

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Problem set 5-2
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5. . (R)-(+)-2-methyl-2-butanol has a specific rotation, [a] 25 D = +5.756 o A sample of 2-methyl-2-butanol has a specific rotation, [a] 25 D = + 1.151 o (a) What is the percent enantiomeric excess and optical purity of the sample?
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Unformatted text preview: (b) Which enantiomer is in excess, (R) or (S) ? ANSWERS 5-2 5. % optical purity = % enantiomeric excess = observed specific rotation of sample x 100% specific rotation of pure isomer = +1.151 o x 100% = 20.00 % +5.756 o...
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