Chemistry
Chemistry, 12.11.2019 05:31, cici170

Apharmaceutical chemist is working on a new large-scale synthesis for the popular pain reliever, naproxen. to be useful, however, the synthesis must be highly stereospecific, for whereas the (s) isomer of naproxen is a safe pain-reducing drug, the (r) isomer is a potentially harmful liver toxin. to determine the purity of the synthesized product, the chemist dissolves 81.6 mg of obtained product in 2.40 ml of solvent and measures the optical activity of the sample in a 5.00-cm tube, observing a value of +1.03? . a 0.500 g/ml solution of pure (s) isomer is measured under identical conditions, giving a value of + 16.5 ? .part a: continue your analysis by finding the specific rotation, [? ], of the synthesized product. express your answer in degrees. part b: determine the optical purity of the obtained product, using the calculated specific rotation values for the pure (s)-naproxen and the synthesized product. express your answer as a percentage. part c: assuming that the only impurity present in the synthesized product is the (r) enantiomer, calculate the percentage of (s)-naproxen it contains, using the previously determined value for optical purity. this can be done by adding the following two equations where d and l represent the percent quantities of the two enantiomers: d ? l = optical purityd + l = 100%

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