tl Draw the chair conformation of the transition state of the given reaction and predict the major diastereoisomer after its aqueous workup. 1. LDA ol ve 2. H
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- Determine the mechanism of nucleophilic substitution of each reaction and draw the products, including stereochemistr CH₂CH3 CI Br + CN d. + CH3COOH a. acetone + -OCH3 e. DMF f. b. C. ||||| a ||||| Br H Br CH2CH2CH3 + CH3OH DMSO H CH3 CI Br + OCH₂CH3 + CH3CH₂OH2. Consider the E2 elimination of compound A and answer the following questions. D H t-BUOK Products Br A (1) Label each stereocenters in compound A with the correct R or S configuration; (2) Draw the structures of the major product with correct stereochemistry (assume D and H have the same reactivity).Which of the following is an intermediate in the reaction sequence shown in the box? КОН, Н,ОEТОН | ? 1. (CH3)2CULI gentle heat 2. HС, Н,О A) B) ОН D) O A В C O: O: O=
- c. Snl reactions dominate under polar protic solvents. Increasing the polarity of the solvent will increase the rate of the reaction because the polar solvent will stabilize the dispersed charges on the transition state more than it will stabilize the neutral reactant. Label areas of ô* and & on the molecules of the transition state of the SN1 reaction below: Me Me Ме Me Me H20 Br -Br OH + НО \'H Et Et RDS Et H Et Et transition state not isolable carbocation intermediate not isolableDraw out the mechanism20. Draw a detailed free energy diagram for the following SN1 reaction. Include and label the overall reactants, the overall products, the intermediate(s), the axis, and the transition state(s). Br ū CI SN1
- Predict the stereochemistry For the E2 reaction Draw a Newmann Projection of the reactive con Formation and the Structure For only major product of the reaction. BrThe alkene 3-methyl-1-butene is reacted with Br₂ in aqueous solution. Br₂. H₂OPQ-6. What is the rate determining step of this reaction? CH₂CH3 (A) HOTS H3C (C) NC CH₂CH3 HOTS H3C CH₂CH3 NaCN Hi H3C (S)-isomer (B) OTS acetone Hi H₂C (D) NC CH₂CH3 CO-H Ts CH₂CH3 ∙H H H₂C CO CN H H3C CH₂CH₂ (R)-isomer
