The specific rotation of pure (R)-C6H5CHOHCH3 is -42.3. A pure sample of (R)-C6H5CHClCH3 was converted to the corresponding alcohol via an SN2 reaction. What is the specific rotation of the product?
Specific rotation of pure (R)- alcohol is -42.3.
S- alcohol having the same specific rotation value but opposite sign
In SN2 reaction the product have inversion of configuration.
(R)- C6H5CHClCH3 + OH- ------> (S) - C6H5CHOHCH3.
Hence specific rotation of product is + 42.3
The specific rotation of pure (R)-C6H5CHOHCH3 is -42.3. A pure sample of (R)-C6H5CHClCH3 was converted to...
30. What is wrong with the following mechanism? 33. Give the name(s) of the product(s) for the following SN2 reaction. Br Br A. There is no leaving group, so there B. The arrow should be removing a proton C. An arrow is also needed to indicate the D. The arrow indicating the formation of should be no arrows. from the H2O group. loss of the leaving group. the C-Br bond (nucleophilic attack) A) (S)-2-hexanol B) (R)-2-hexanol C) (S)-3-hexanol D) (R)-3-hexanol...
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
If a pure R isomer has a specific rotation of –136.0°, and a sample contains 65.0% of the R isomer and 35.0% of its enantiomer, what is the observed specific rotation of the mixture?
if a pure R isomer has a specific rotation of -106.0, and a sample contains 70.0% of the R isomer and 30.0% of it's enantiomer, what is the observed specific rotation of the mixture
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14. (5) Pure (R)-mandelic acid has a specific rotation of -154. If a sample contains 60% of the R isomer and 40 % of its enantiomer, what is the c of this solution if the sample is run in a 15.0 cm solutions cell at a concentration of 0.125 g/mL?
2. The optical activity, measured by specific rotation, of pure (R-malic acid is [a]20D-+27% What is the specific rotation of a mixture of 50% and 50% of (R)-malic acid and (S)-malic acid? What is enantiomeric excess of a sample of malic acid containing both enantiomers that has a [al20D -0% [a]20D-27"; [a]20D-_ 13.5": [a]20D-+ 13.5°
7 (7 pts) The specific rotation, (a), of an optically pure natural product 15 compound we made in the lab was prepared by diluting 12.55 grams of it in a 30.0 cm polarimeter tube. pure natural product is -65.0°. A sample of the same uuting 12.55 grams of it into 40.0 ml of ethanol and placed A) Our compound was found to have an "ee" of 80% - What was the specific totam % - What was the specific rotation...
3. Pure Θ Kaylanoic acid has a specific rotation of-160° (same conditions and temperature as sample above). What is the % optical purity of the sample above ? (0.75 points) 4. 3.5 mg of optically-enriched(-) antibiotic Zachromycin was dissolved in 1.00 mL methanol in a 1.00 mL volumetric flask. The optical rotation was found to be -0.02220 in a 5.0 cm cell. What is the specific rotation? (0.75 points) 5. Calculate the enantiomeric excess and the specific rotation of a...
If a sample of carvone gives a specific rotation of -60 and the specific rotation of (R) -carvone is -61, does the unknown sample primarily have the R or S absolute configuration?
6. Optically pure (-)-2-butanol has the R configuration and [a] = -13.52º. Optically pure (-)-2-iodobutane has the R configuration and (a) = -15.9º. A sample of 2-butanol with specific rotation of +11.1° was found in reaction with hydrogen iodide in tetrahydrofuran solvent to yield 2-iodobutane of specific rotation-10.9º. a. Does the reaction proceed with predominantly retention or inversion of configuration? Explain how you determined your answer. b. Determine the optical purity (%OP) which is also the enantiomeric excess (%ee) of...