The mechanism for the following reaction between an epoxide and LiAlHд occurs in a stepwise fashion. 1. LiAlH 2. H₂O OH Draw the correct mechanism in the space below. You may need to re-draw structures to show certain bonds. Be sure to include all nonzero formal charges.
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- The Wolff–Kishner reaction uses hydrazine (H2NNH2) and hydroxide (–OH) to reduce a carbonyl to the alkane. The first steps of the mechanism convert a carbonyl to a hydrazone in a manner similar to imine formation. Draw the mechanism arrows for the reaction from the hydrazone to the alkane. Be sure to add lone pairs of electrons and nonzero formal charges to all species.Please provide a curved-arrow mechanism for the following reaction. Be sure to use your mechanism and a few words to explain the regiochemistry of the bromines in the final product and why each carbocation intermediate in your mechanism is the preferred intermediate for that step. Include ALL lone pairs and formal charges. Thank you.1. Draw a reasonable arrow-pushing mechanism for the transformation shown along. 2. Identify nucleophiles and electrophiles 3. Name any type of reactions taking place like E2 or E1 4. Account for any regio- or stereoselectivity
- Carbocations often rearrange, as shown below. Draw in the hydrogens on the two carbons involved in the rearrangement, and show formal arrow-pushing to illustrate the transformation.Based on your answer to parts A - C, draw the correct regio- and stereoisomer of the product in the space provided. Provide a systematic name of the substrate. Provide a systematic name of the product (see section 8.3 for alkene nomenclature). Draw a transition state structure of the reaction with partial bonds and partial charges indicated. Draw an energy diagram for the E2 reaction on the previous page. Your reaction coordinate diagram should: Include structures of starting materials, products, and transition states at correct relative energies. Indicate the activation energy of the rate determining step and whether the reaction is endothermic or exothermic.Show the stepwise mechanism for the entire reaction below, including all arrows and intermediates. Your EAS should show at least one resonance form for the sigma complex.
- Would you expect the reactivity of a five-membered ring ether such as tetrahydrofuran (Table 10.2) to be more similar to the reactivity of an epoxide or to the reactivity of a noncyclic ether? Why?When drawing organic chemistry mechanisms with NaOCH3, do we automatically dissociate it into Na+ and OCH3-, making it easier to go through SN2 and/or E2 reactions? Does NaOCH3 dissociate, and is this why it is a strong nucleophile?2. In not more than three (3) sentences, explain why terminal alkynes are acidic.3. What impurities are removed when acetylene gas is made to pass through an acidifiedsolution of CuSO4?4. Explain the difference in the rate of free radical bromination reactions of toluene and cyclohexane.
- The hydrobrominationof 2-methyl-1-butene could theoretically lead to 2 different alkyl bromides; in practice only one product is formed. Draw the structure of both theoretical products, circle the one that is actually produced, and briefly explain whyonly one product forms.With reference to the indicated C–H bonds in the following compound:a.) Rank the C–H bonds in order of increasing bond strength. b.) Draw the radical resulting from cleavage of each C–H bond, andclassify it as 1°, 2°, or 3°. c.) Rank the radicals in order of increasing stability.d.) Rank the C–H bonds in order of increasing ease of H abstraction in aradical halogenation reaction.Arrange the following alkyl halides in increasing reactivity in E2 reaction. Write 1 for the least reactive, then 2 and 3 for the most reactive Answer: A. _____ B. _____ C. _____