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zhiyuan3yu5
 3 years ago
Sometimes the 1phenylethylamine tartrate salt crystallizes as fine needles rather than the desired prisms. The 1phenylethylamine recovered from these needles has been found to have a specific rotation of 20.1 degrees. What percent of ()1phenylethylamine is this amine mixture? What is the percent of (+)1phenylethylamine?
zhiyuan3yu5
 3 years ago
Sometimes the 1phenylethylamine tartrate salt crystallizes as fine needles rather than the desired prisms. The 1phenylethylamine recovered from these needles has been found to have a specific rotation of 20.1 degrees. What percent of ()1phenylethylamine is this amine mixture? What is the percent of (+)1phenylethylamine?

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aaronq
 3 years ago
Best ResponseYou've already chosen the best response.0do you have the data of the light rotation of the mixture?

zhiyuan3yu5
 3 years ago
Best ResponseYou've already chosen the best response.0[a]D of pure () 1phenylethylamine is 40.2 degrees

aaronq
 3 years ago
Best ResponseYou've already chosen the best response.0actually 3/4 and 1/4 3/4 x 40 =  30 1/4 x 40 = 10 = 20

zhiyuan3yu5
 3 years ago
Best ResponseYou've already chosen the best response.0okay that makes sense. thank you. do you think you can help me with another problem related to optical purity?

aaronq
 3 years ago
Best ResponseYou've already chosen the best response.0il give it a try, but i don't promise anything

zhiyuan3yu5
 3 years ago
Best ResponseYou've already chosen the best response.0after the formation and separation of diastereomers and treating the diastereomer salt with excess strong base, what other experimental method can be used to yield ()1phenylethylamine of higher optical purity?

zhiyuan3yu5
 3 years ago
Best ResponseYou've already chosen the best response.0this is basically the lab : http://www.chem.ucla.edu/~bacher/Specialtopics/Resolution.html

aaronq
 3 years ago
Best ResponseYou've already chosen the best response.0im not sure, but in the link you send me is says "The (1R,2R)amine(2R,3R)acid salt crystallizes from hot water, while the (1S, 2S)amine(2R,3R)acid and the cis salts stay in solution." have you figured out the stereochem of that you're separating
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