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zhiyuan3yu5
Group Title
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?
 one year ago
 one year ago
zhiyuan3yu5 Group Title
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?
 one year ago
 one year ago

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aaronq Group TitleBest ResponseYou've already chosen the best response.0
do you have the data of the light rotation of the mixture?
 one year ago

zhiyuan3yu5 Group TitleBest ResponseYou've already chosen the best response.0
[a]D of pure () 1phenylethylamine is 40.2 degrees
 one year ago

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

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

aaronq Group TitleBest ResponseYou've already chosen the best response.0
il give it a try, but i don't promise anything
 one year ago

zhiyuan3yu5 Group TitleBest ResponseYou've already chosen the best response.0
after 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?
 one year ago

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

aaronq Group TitleBest ResponseYou've already chosen the best response.0
im 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
 one year ago
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