19) Would a 50/50 mixture of the two compounds below be optically active? Briefly explain your...
7.66 A mixture contains equal amounts of compounds A-D. a. Which compounds alone are optically active? b. If the mixture was subjected to fractional distillation, how many fractions would be obtained? c. How many of these fractions would be optically active?
5.66 A mixture contains equal amounts of compounds A-D. a. Which compounds alone are optically active? b. If the mixture was subjected to fractional distillation, how many fractions would be obtained? c. How many of these fractions would be optically active?
Consider the two reactions below for the optically active alkyl halide, (R)-2-chloropentane. The first reaction occurs rapidly at room temperature and gives an optically active product. The second reaction, starting with the same alkyl halide, occurs slowly at room temperature and gives a non-optically active product (racemic mixture). Draw a mechanism (include all H's and lone pairs) for cach reaction and explain how the mechanism leads to the observed results. Hics CHES- CH.OH CH,OH
Practice Problem 07.71 When the following optically active alcohol is treated with HBr, a racemic mixture of alkyl bromides is obtained OH Br HBr + H2O Racemic mixture Draw the mechanism of the reaction. Step 1 Get help answering Molecular Drawing questions. Incorrect, Did you follow the instructions exactly when drawing this mechanistic step, what type of mechanism step is shown here? Is it a Loss of Leaving Group or Nucleophilic Attack or Proton Tranfer or Rearrangement? Draw step 1...
1) Label each of the following molecule as optically active (OA) or optically inactive (OD? (Type in your answer as OA or OL in the blank space below each structure) [6] OH 1:1 Mixture
10) Which of the following are optically inactive? A) a 50-50 mixture of Rand Senantiomers B) a racemic mixture C) every achiral compound D) a meso compound E) all the above 11) If (S)-glyceraldehyde has a specific rotation of -8.7, what is the specific rotation of (R)-glyceraldehyde? A) +8.7 B) -8.7 C) 0.0 D) cannot be determined from the information given 12) What is the relationship between the following compounds? HCI CH - CH₂ CH3 HEC HCI HEC X сін...
Below are shown two reaction pathways in which optically active
(R) -1-phenylethanol (F) is converted to ethyl 1-phenylethyl ether
(TsCl = p-toluenesulfonyl chloride, DMF = N, N-dimethylformamide).
Explain why the optical rotation of the product has the opposite
sign from the two reaction paths.
CH3 CH3 CH-ONa CH3CH2OTs DMF CH-OCH2CH3 NaHr [a]= +19,9 CH3 -CH-OH TSCI [a]o = +33,0 pyridin ou un - CH2 CH3 CH-OTS CH3CH2ONa DMF CH3 -CH-OCH2CH3 [a]o = -19,9
why
is the answer C? Wouldn't 5 be meso? please explain each answer if
you can
BE 60 Which of the following are optically active compounds? CH3 H Br H2H HCH, H- CHg Br CH3 H H CH₃ CH3 H H H Br Br Br Br 3 CH₂ Br A. 1 and 4 B. 1,4, and 5 C. 2,3, and 5 D. 4 only
Question 11 (7 points) ✓ Saved A 50:50 mixture of these compounds would also rotate plane polarized light. H CH3 H3CH H3N H3N L-alanine D-alanine True O False
What would the mixture
of the two products be? thanks in advance
Draw the structures, including stereochemistry, of the two intermediates and the final product. Use wedge/das bonds and hydrogens on chirality centers. mixture of two optically active compounds