In an E1 mediated elimination reaction, which of the following statement is not true? The reactivity order for alkyl halides (RX) is tertiary > secondary> primary. The rate of reaction = k₁ [alkyl halide] [NaOCH3]. O The rate is dependent on the leaving group. The reaction proceeds through a carbocation intermediate.
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- CH3 CH3 Br- Br2 .CH3 CH2Cl2 CH3 H3C H3C Br Electrophilic addition of bromine, Brɔ, to alkenes yields a 1,2-dibromoalkane. The reaction proceeds through a cyclic intermediate known as a bromonium ion. The reaction occurs in an anhydrous solvent such as CH,Cl,. In the second step of the reaction, bromide is the nucleophile and attacks at one of the carbons of the bromonium ion to yield the product. Due to steric clashes, the bromide ion always attacks the carbon from the opposite face of the bromonium ion so that a product with anti stereochemistry is formed. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions CH3 CH3 CH3 CH3 H3C H3C :Br: :Br:12) Use the curved arrow formalism to show the movement of electron pairs in the following reaction and label each reactant as a nucleophile or an electrophile. CHÍNH CHỊCH, + CO Học Nha CH₂CH₂CIConsider the following mechanism of reaction: CH3 CH, CH3 CH;C CH, + H-CI CH;CCH, + C: → CH;CCH, tert-butyl cation CI tert-butyl chloride In this reaction: The alkene and the carbocation intermediate are both nucleophilic HCl and CI" are both nucleophilic The alkene and HCI are both electrophilic The carbocation and CI" are both electrophilic The alkene and CI" are both nucleophilic AMeving to another question will save this response
- Give one example of elimination reaction (E2) type. Show the reactants materials and the product. Draw the reaction mechanism?4. What are the products obtained from the following elimination reaction? Indicate the major product. CH3 CH,CH,ČCH, H2O 5. a) Determine the major product that is formed when the alkyl halide reacts with a hydroxide ion in an elimination reaction. CH;CH,CH,CH,CCH, Br b) For the major elimination product obtained in 5a), which stereoisomer (cis or trans) is obtained in greater yield? Draw the two isomers and provide the names of the compounds.2. The following carbocation is generated as an intermediate in the addition of H-Br to an alkene. Draw the structure of all possible alkenes that could have formed this intermediate.
- The reactants, intermediates, final products, and all curved arrows showing bonds forming andbreaking are collectively referred to as the mechanism of a reaction. For the following reactants: a. Explain why the original statement of Markovnikov’s rule does not help in this case, but themodern restatement of Markovnikov’s rule tells you which carbon will get the X (Cl). b. Show the mechanism of the most likely addition reaction between the reactants.Which is true of a free energy diagram for an SN1 eaction? It shows one transition state. It always shows that the reaction is net exothermic. It never shows intermediates. It always shows that the reaction is net endothermic. It always includes multiple energy barriers.Rank the following alkenes in order of increasing rate of hydrogenation. 11 OI<|||< IV < II <|| < |||H3C CH3 H3C NA C→XT Br Br₂ CH₂Cl₂ H3C Electrophilic addition of bromine, Br₂, to alkenes yields a 1,2-dibromoalkane. The reaction proceeds through a cyclic intermediate known as a bromonium ion. The reaction occurs in an anhydrous solvent such as CH₂Cl₂. CH3 Br In the second step of the reaction, bromide is the nucleophile and attacks at one of the carbons of the bromonium ion to yield the product. Due to steric clashes, the bromide ion always attacks the carbon from the opposite face of the bromonium ion so that a product with anti stereochemistry is formed. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions Br CH3 H3C CH3When benzyl bromide is treated separately with KI and CH3OH, the substitution products are different but the reaction rates are about the same. KI Br (a) What does this suggest about the mechanism-is it SN1 or SN2? Explain. (b) Draw the complete mechanism (including curved arrows) for the formation of each product. (c) If the concentration of KI were doubled, what would happen to the rate of the substitution reaction? HOCH3 ?Draw the most stable resonance form for the intermediate in the following electrophilic substitution reaction. CH3O + You do not have to consider stereochemistry. • Include all valence lone pairs in your answer. • In cases where there is more than one answer, just draw one. ? [F H3PO4 CH3O OHSEE MORE QUESTIONS