2. R-3-Bromo-3-methylhexane has a rotation of +100: When placed in 48% aqueous HBr the optical rotation changes rapidly. Within 10 min it is +50 In 20 min it is +25 What is the rotation after 1 day? What is the relative amount of R and S isomers at 10 min? (not required but you should be able to write a mechanism for this)

2. R-3-Bromo-3-methylhexane has a rotation of +100: When placed in 48% aqueous HBr the optical rotation changes rapidly. Within 10 min it is +50 In 20 min it is +25 What is the rotation after 1 day? What is the relative amount of R and S isomers at 10 min? (not required but you should be able to write a mechanism for this)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Stereochemistry of hydroboration. There are two products that result from this reaction. Products 1 and 2 are stereoisomers of each other. The first product is thermodynamically more stable than the second product. Draw how the two products will look like. Also draw the most stable conformation of the first product. OH J 1. 9-BBN, THF 2. H₂0₂, H₂O, NaOH
a Give the chemical structure of (2R.3S)-2,3-dibromopentane b. Identify the following pairs of compounds as either enantiomers, diastercomers, or identical CN .COOH он CCH но CCH and NC COOH Give the structure of any reagent that can be used to enantiomerically resolve R- and S- ibuprofen
Explain why the ERC and ERO of 1,3,5-cycloheptatriene have an equilibrium constant of almost 1. Put another way, why are the ring opening/closing reactions in equilibria at room temperature?
The specific angle of rotation of (R)-2-bromobutane is -23.1°. Treatment of (R)-2-bromobutane with potassium bromide produces a racemic mixture of (R)- and (S)-2-bromobutane, which is optically inactive. The rate at which the product's angle of rotation decreases is directly proportional to the concentration of KBr. Does this suggest that the reaction takes place by an SN1 or an SŅ2 mechanism? Explain.
4 What are enantiomers? What instrument can you use to distinguish the enantiomers? What is racemic mixture? What is enantiomeric excess (e.e)? 5 For a chiral compound with 2 chiral centers how many configurations (also called isomers in lose sense) are possible. Use 2¹ rule. 6 Pure (R)- lactic acid has rotation of + 12.31º. A mixture of lactic acid has a specific rotation of +2.71º. Determine the percent composition of two enantiomers (R) and (S) in the mixture.
Fill in the missing products and intermediates
3.
Draw one of the two enantiomers of the major product from this reaction. Use a dash or wedge bond to indicate stereochemistry of substituents on asymmetric centers. Ignore inorganic byproducts. j + 1. B₂H6, THF 2. H₂O2, NaOH Drawing
● ● ● ● (A) Cl₂ CH₂=CHCH3 heat Propene OH HOCH₂CHCH₂OH 1,2,3-Propanetriol (glycerol, glycerin) Provide structures for all intermediate compounds (A-D) and describe the type of mechanism by which each is formed. (B) 2A (C₂H₂C1) CI a C (C₂H₂C1O₂) *85 H H₂C=C All hydrogen atoms are implied. Apply formal charges where appropriate. Omit lone pairs and radical electrons from your answer. You do not have to consider stereochemistry. C-Cl H₂ NaOH, H₂O internal displacement Lindlar reduction SN1-substitution SN2-substitution acid-catalyzed hydrolysis addition-elimination allylic halogenation halohydrination vinylic halogenation H H₂C=C Ca(OH)2 D (C3H6O₂) heat → B (C₂H₂O) 00 OU Cl₂, H₂O در H₂O, HCI 2 ster n ? ChemDoodle [Refere ?
Rearrangment (р 1283) H,C, CH, ZnBr, H,C CH, Br CH HBr CH 93% yield он (Manning P. Cooke, Jr.) I need help with the mechanism to obtain the product. Thanks
Chemistry F₁₁, CH3 Br FF CH3 Do I of CH₂CI CH3 H₂N H H3C CH3 OH Determine the absolute configuration (R/S) of the stereogenic carbon of the following compounds
Draw one of the two enantiomers of the major product from this reaction. Use a dash or wedge bond to indicate the stereochemistry of substituents on asymmetric centers. Ignore inorganic byproducts. + ICI 101 Dr ng a