Addition of hydrochloride acid to 1-isopropenyl-1-methylcyclopentane generates 1-chloro-1,2,2 trimethylcyclohexane. Draw the complete mechanism, including intermediates, to illustrate electron flow in the reaction.
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Addition of hydrochloride acid to 1-isopropenyl-1-methylcyclopentane generates 1-chloro-1,2,2 trimethylcyclohexane. Draw the complete mechanism, including intermediates, to illustrate electron flow in the reaction.
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- When 2-cyclobutylpropan-2-ol is treated with a solution of HBr in Et2O, 2-bromo-1,1-dimethylcyclopentane is the resulting product. Write the reaction and propose a mechanism using curved arrows notation in each step.In the presence of acid such as H2SO4, 3,4-dimethyl-1-pentene undergoes isomerization to 2,3-dimethyl-2-pentene (shown below). Write a complete mechanism, showing all steps and using curved arrows to explain this observation.What are the products obtained (2 stereoisomers A and B) when (Z)-hex-3-ene is treated with Br2 in anhydrous medium? Show the mechanism of this reaction. When the dibromide formed is treated with KOH in EtOH, only (Z)-3-bromohex-3-ene. Explain this result and justify why the E isomer cannot be obtained here. here.
- The reaction of (S)-2-bromopentane with potassium cyanide to yield 2-methylpentanenitrile (2-cyanopentane) occurs due to a nucleophilic substitution pathway. The reaction is 100% stereospecific. Please explain what this observation tells about the mechanism of the reaction.(a) Give a mechanism for this reaction, showing how the two products arise as aconsequence of the resonance-stabilized intermediate.(b) The bromination of cyclohexene using NBS gives only one major product, as shown onthe previous page. Explain why there is no second product from an allylic shift.What is the major product on photolysis of 1, 4-dimethyl-1, 3-cyclohexadiene in presence of excess oxygen, and a catalytic amount of Rose Bengal followed by reduction with H2/Pt? Show the mechanism.
- Give all the monobromination products of 2-methylpropane (or isobutane) in presence of heat or energy. Identify the major product and propose a mechanism leading to the formation of the major product. Provide a reaction in the termination step.provide a detailed mechanism for the dehalogenation of meso-1,2 dibromo 1,2 diphenyl ethane. show all electron movements + use arrows. Include intermediates.write down the mechanism for the reduction of cyclohex-2-en-1-one with sodium borohydride and then H3O+
- Propose mechanisms and draw reaction-energy diagrams for the following reactions. Pay particular attention to the structures of any transition states and intermediates. Compare the reaction-energy diagrams for the two reactions, and explainthe differences.(a) 2-Bromo-2-methylbutane reacts with sodium methoxide in methanol to give 2-methylbut-2-ene (among other products)What steps are needed to prepare phenylacetylene, C6H5C = CH, from each compound: (a) C6H5CH2CHBr2; (b) C6H5CHBrCH3; (c) C6H5CH2CH2OH?give a complete mechanism for the reaction and identify the hemiacetal adn acetal.