.For each reaction to an α,ẞ-unsaturated carbonyl compound below... a. For the a,ẞ-unsaturated carbonyl starting material identify the hard electrophilic carbon by writing H and the soft electrophilic carbon by writing an S. b. Identify the nucleophile as soft or hard by writing soft or hard, as appropriate. C. Draw the final product for the reaction with correct stereochemistry.
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- For the following reactions: A. Draw the missing reactant, reagent or product including the correct stereochemistry where appropriate. B. Determine the Reaction Pathway (Sn1, Sn2, E1, E2) leading to the desired product C. How many steps are in the Reaction as can be plotted on a Reaction Coordinate?. For each reaction to an α,ẞ-unsaturated carbonyl compound below... a. For the a,ẞ-unsaturated carbonyl starting material identify the hard electrophilic carbon by writing H and the soft electrophilic carbon by writing an S. b. Identify the nucleophile as soft or hard by writing soft or hard, as appropriate. C. Draw the final product for the reaction with correct stereochemistry. a) b) c) H CH3SNa CH3CN, H₂O supply reagents and conditions 1. LiAlH4 OCH3 2. dilute H3O+ d) 1. (CH3)2CuLi ether 2. H3O+ H. For each reaction to an α,ẞ-unsaturated carbonyl compound below... a. For the a,ẞ-unsaturated carbonyl starting material identify the hard electrophilic carbon by writing H and the soft electrophilic carbon by writing an S. b. Identify the nucleophile as soft or hard by writing soft or hard, as appropriate. C. Draw the final product for the reaction with correct stereochemistry. 1. LiAlH4 c) OCH3 2. dilute H3O+
- 1. Consider the following reaction. CI EtOH OEt a. Provide a reasonable arrow-pushing mechanism for the following reaction, showing all steps and balancing all charges. b. Predict the stereochemistry of the final product(s). c. Label the electrophilic sites on the molecule and explain why only one of them undergoes substitution.Hint: think about carbocation stability of benzylic carbocations vs. simple tertiary carbocations b. НО cat. H,SO4 EtОH НО cat. H2SO4 EtОH A Mechanism: Product of faster reaction: Reason: Il..1.a. Give the product(s) of the reaction below. …...... D H₂, Pd/C Show stereochemistry. Give product(s) for this reaction. No mechanism is necessary. 1.b. Are there multiple products in 1.a.? Are there major and minor product(s)? Explain.
- Rank the nucleophiles in each group in order of increasing nucleophilicity.a. -OH, -NH2, H2Ob. -OH, Br-, F- (polar aprotic solvent)c. H2O, -OH, CH3CO2-10. Explain the reaction shown below. Include the following pieces in your explanation. a. Identify the electrophile and the nucleophile. b. Draw a curved arrow mechanism for this reaction. (Assume an acidic work-up). Explain the electron flow. Indicate any regiochemical or stereochemical preferences. C. d. LIAIH4 OHThe E2 reaction is defined as stereoselective if the reacting alkyl halide contains? The E2 reaction is defined as regioselective if the reacting alkyl halide contains? only one β-hydrogen. two β-hydrogens attached to the same β-carbon atom. ...two β-hydrogens attached to different β-carbon atoms. ...no β-hydrogens.
- 10. Explain the reaction shown below. Include the following pieces in your explanation. Identify the electrophile and the nucleophile. Draw a curved arrow mechanism for this reaction. (Assume an acidic work-up). Explain the electron flow. Indicate any regiochemical or stereochemical preferences. one b. c. d. LIAIH4 OH one2. Which reaction in each set would be expected to be faster? Explain by showing key intermediates, transition states, and or orbitals. -OTS a. b. TSO Ph-O or Ph Br or solvolysis in acetic acid Ph g Br Ph-O solvolysis in acetic acidDraw the major organic substitution product or products for (2R,3S)-2-bromo-3-methylpentane reacting with the given nucleophile. Clearly drawn the stereochemistry, including a wedged bond, a dashed bond and two in-plane bonds at each stereogenic center. Omit any byproducts. Br CH;CH20 (conc.) H.