The following molecule can theoretically undergo both E2 and SN2 with sodium methoxide but is more likely to undergo SN2. i) Explain showing chair-conformations (4 Ma ii) Provide a mechanism for the SN2 reaction (chair conformation) including transition state Br (3 Ma
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- (1R,2R)-1-Bromo-2-methylcyclopentane is reacted with sodium methoxide. Given the product(s) and show the reaction mechanism, including the depiction of the transition state. Draw an energy diagram for this conversion.79 3. Complete the following reaction and write a mechanism for both the substitution and elimination products (both substitution and elimination products occur simultaneously). Discuss all criteria including stereochemistry when a chiral secondary primary alkyl halide with (S) configuration reacts with methanol a weak nucleophile. Draw energy profile for this reaction. (4 points) CH2CH3 CH₂O-Na+ + Br H3C (S) no 1999b 02.907 90 +20110Predict the products of each reaction. If the product has stereochemistry, draw the products using dash wedge notation. Draw all stereoisomers formed and indicate if the product is achiral or chiral. Draw a mechanism for each reaction clearly showing how the product stereochemistry is produced. You are not required to draw the final step(s) in the mechanism for reactions involving organometallic intermediates.
- 6. 20For the following reaction: + OH 1.) 2Naº O 2.) Br Predict the major product, and show the mechanism for the formation of the major product.Describe the E/Z stereochemistry for the molecules shown below: A: Z; B: Z A: Z; B: E A: E; B: E A: E; B: Zunder what type of mechanism are the following reactions carried out: SN2, SN1, E2, E1? show both reactions
- 1-1) Include both E1 and E2 mechanisms to form alkene products from the mixture of cis and trans-2 methylcyclohexanol. E2 mechanism for cis and trans isomers must contain stereochemistry and chair conformation. Indicate the conformation that leads to product formation. 1-2) Briefly discuss the thermodynamic and kinetic product of each reaction. E1,E2 cis and E2 trans(R)-2-chloropentane was reacted with NaSCH3. The compound yielded 65% (S)-2-chloropentane with the enantiomer making up the other 35%. Which mechanism was followed in the reaction? Both, more SN2 Both, more SN1 SN1 SN2Para-substituted product was produced when phenol reacts with cyclohexanecarbonyl bromide in the presence of AIB13. -Br Cyclohexanecarbonyl bromide (i) Outline the mechanism for this reaction. (ii) Draw the alternative substituted product formed.
- 7В. (2 Draw the structure of the product, substrate or condition in the following reactions (should clearly indicate the stereochemistry). (а) OH (b) OsO vaHSO3 (c) 1) (sia)2 BH 2) NaOH/H,O2 H20 (d) HBr (2 equiv) Br, Br Hint: This is the only product formed (e) Br Br2 H20 OH (f)Pcaetie Consider the following reaction: Br2 H20 a) Write a detailed mechanism for this transformation b) Provide a brief explanation for the location of the heteroatoms in the final product (regiochemistry). A structure may be helpful here. c) Briefly account for the stereochemistry of the final product. A structure may be helpful here.1) Predict the major products or substrates of the following reactions. If it is possible, write all stereoisomers. (10p) 1)Hg(OAc)2, THF, H20 (1) NaNH2 2) NaBH4, ОН (2)BzBr (3) H2/Li, ETNH2 b) HCI e) 1) O3 no peroxides 2) Zn/ACOH (1)OsO4 (2) NaHSO3, H20