If a sample contains 76.0% of the R enantiomer and 24.0% of the S enantiomer, what is the enantiomeric excess of the mixture?
enantiomeric excess = [% R - %S / % R + %S] x 100
= [76-24 / 76+24] x 100
= 52 %
Therefore, enantiomeric excess of the mixture = 52 %
If a sample contains 76.0% of the R enantiomer and 24.0% of the S enantiomer, what...
if a sample contains 83% of the R enantiomer and 17% of the S, what is the enantiomeric sxcess? the following compound is optically active or not. all 2019 Achical Be No 3 Br 03 pts.] If a sample contains 83% of the R enantiomer and 17% of the S enantiomer vhat is the enantiomeric excess of the mixture. 3 pts.1 What is the specific rotation of a sample of carvone that is an equal mixture the R and S...
A mixture of enantiomers contains 84% of the R enantiomer and 16% of the Senantiomer. What is the enantiomeric excess? HTML Editor * BI А Ix 3 3 3 3 3 x?
Question 14 1 pts A mixture of enantiomers contains 84% of the R enantiomer and 16% of the Senantiomer. What is the enantiomeric excess?
what is the %ee of a mixture of enantiomer that contains 27% of the “R”enantiomer?
Question 18 1.88 pts What mass of the R enantiomer is present in a 10.0 g sample which has an enantiomeric excess of 20.0% of the S isomer? a) 1.00 g b) 2.00 g c) 3.50 g d) 4.00 g e) 6.00 g O a) Ob) Oc) Od) Oe)
9. Specific rotation of enantiopure (R)-malic acid is -6. An unknown sample was found to have a specific rotation of -2 Which isomer is the major component in the unknown mixture? HO OH Malic Acid O OH Circle one: R S What is the enantiomeric excess of the mixture? Show your calculations. 9. Specific rotation of enantiopure (R)-malic acid is -6. An unknown sample was found to have a specific rotation of -2 Which isomer is the major component in...
15, 16 how do i do these? ВІ 15.03 pts.) If a sample contains 83% of the Renantiomer and and 17% of the Senantiomers what is the enantiomeric excess of the mixture. EE - 100% 16.03 pts.] What is the specific rotation of a sample of carvone that is an equal mixture of the Rand S enantiomers (R- carvone has a specific rotation of -61)?
the R-(+) enantiomer of a certain compound has a specific rotation of +52. A mixture of this compound with its enantiomer has a has an observed rotation of -26. what is the %ee of this sample and which enantiomer is in excess? what is the ration of R:S in this mixture?
11. Enantiopurity - How pure a substance is in one enantiomer over the other is expressed as a % enantiomeric excess. Consider the following theoretical scenario: CH2OH CH2OH optical rotation: +100° optical rotation: -100° % composition % enantiomeric excess observed rotation In the lab, a polarimeter can give you optical purity (% enantiomeric excess) by comparing against a pure enantiomeric standard: Optical purity = specific rotation of sample - X 100 specific rotation of pure enantiomer Page 2 A mixture...
If a pure R isomer has a specific rotation of – 106.0°, and a sample contains 79.0% of the R isomer and 21.0% of its enantiomer, what is the observed specific rotation of the mixture? Number [a] = 10