Write the steps that are critical in the following reaction in order to explain the stereo- chemical outcome at the carbon marked with the asterisk. CH3O,C ÇO,H CO2CH3 Pd(PPh,)4 NaCH(CO,CH3)2 H3CY "CH3 H,C
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- For the nitration of a monosubstituted benzene, which substituent, when attached to benzene, produces the fastest reaction rate? —Br —CH3 -OCOCH3 —OCH3Consider the following statement in reference to SN1, SN2, E1, and E2 reactions of haloalkanes. To which mechanism(s), if any, does the statement apply? Order of reactivity of haloalkanes is methyl . 1° > 2° > 3°.OCHEM... Give a detailed reaction mechanism for the reaction expected to occur when 2-bromo-2-methylpentane is heated with methanol. Draw clear structural formulas of all relevant species and use curved arrows to represent electron flow. Also, indicated which step is likely to be rate-determining.
- What type of mechanism is needed for this reaction?Consider the following statement in reference to SN1, SN2, E1, and E2 reactions of haloalkanes. To which mechanism(s), if any, does the statement apply? Order of reactivity of haloalkanes is 3°> 2°> 1°.Complete the following reaction: H3N:BF3 + BCl3 Write down and explain the possible reaction mechanism with the rate law for this SE1 reaction.
- Fill in necessary products reactants or reagants of these reactions. Please note the existence of enantionmers in some cases.Show stereo chemistry and possible outcomes and the steps for the reaction.Which overall reaction is consistent with the reaction mechanism below? (CH3)3CBr→(CH3)3C++Br- (CH3)3C++OH-→(CH3)3COH (CH3)3CBr+ OH-→(CH3)3COH+Br- (CH3)3C++Br-→(CH3)3COH (CH3)3CBr+OH-→(CH3)3C++(CH3)3COH (CH3)3C++OH-→(CH3)3COH
- Rearrangements can occur during the dehydration of 1° alcohols eventhough no 1° carbocation is formed—that is, a 1,2-shift occurs as the C—OH2+ bond is broken, forming a more stable 2° or 3° carbocation, asshown in Equation [1]. Using this information, draw a stepwisemechanism for the reaction shown in Equation [2]. We will see anotherexample of this type of rearrangementBelow is the equation for a nucleophilic substitution reaction and some experimental data. CH3CH2Br + CH3COO- ⇌ CH3CH2CO2CH3 + Br- ΔH=-75 kJ/mol Rate = k [CH3CH2Br][CH3COO-] Which reaction energy profile would be the best representative of the data provided?Rearrangements can occur during the dehydration of 1° alcohols even though no 1° carbocation is formed—that is, a 1,2-shift occurs as the C— OH2+ bond is broken, forming a more stable 2° or 3° carbocation, as shown in Equation [1]. Using this information, draw a stepwise mechanism for the reaction shown in Equation [2]. We will see another example of this type of rearrangement in Section 16.5C.