n each of the following, indicate which E2 reaction will occur faster. Explain y

Question

n each of the following, indicate which E2 reaction will occur faster. Explain your reasoning. a, '-bromo-2-methylbutane or 2-bromo-2-methylbutane with NaOCH) in HOCH,, b. Reaction of 2-bromobutane with NaNH, in NH, or NaOCH, in HOCH, 4. Give the mechanistic symbols (S,l.s,2. El. E2) that are most consistent with each of the following statements. More than one symbol could be true for any given statement (list all that apply). a. 3"halides react with NaOCH, in CH,011 mainly by this/these mechanism (s). b. Increasing the concentration of the alkyl hal c. Protic solvents increase the rate of these reactions. d. These mechanisms have only one transition state. e· 2° halides react with H2O mainly by thisthese mechanisms),- lide will increase the rate of these reactions.

Explanation / Answer

Since we have a very strong base the primary alkyl halide will react, 1 bromo 2 methyl butane will go faster than 2 brom 2 methyl butane, this is because E2 follows zaitsev´s rule that says that the most substituted alkene will be the major product and this will be the case for the 1 bromo-R

Since E2 is favored with a strong base, We can expect that the reaction occurs easily and faster with NaNH2, which is a stronger base than NaOCH3

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