Please select the correct name for the molecule at the top. Make sure the correct stereochemistry is indicated. (Z)-3,4,dimethylhept-3-ene (E)-3,4,dimethylhept-3-ene (Z)-4,5,dimethylhept-4-ene (E)-4,5,dimethylhept-4-ene O O O
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- Rank these in order of increasing reactivity in an SN1 reactionThe reaction below precedes via an E2 elimination versus an SN2 reaction. Circle all of the answers that correctly support this reaction outcome. NaOCH3 + Naci CH;OH The nucleophilicity of the methoxide anion (CH3O) is reduced in protic solvent The primary alkyl halide provides too much sterics for an effective SN2 reaction to occur Sodium methoxide (NaOCH3) is a strong enough base to deprotonate the alkyl chloride Stable primary carbocations can form beta-hydrogens on the carbon adjacent to the chloro group are available for deprotonation O O O O OThe reaction below precedes via an E2 elimination versus an SN2 reaction. Circle all of the answers that correctly support this reaction outcome. NaOCH3 + NaCi CI CH;OH The nucleophilicity of the methoxide anion (CH30") is reduced in protic solvent The primary alkyl halide provides too much sterics for an effective SN2 reaction to occur Sodium methoxide (NaOCH3) is a strong enough base to deprotonate the alkyl chloride Stable primary carbocations can form beta-hydrogens on the carbon adjacent to the chloro group are available for deprotonation
- Choose the reagent(s) that would be most likely to complete this reaction. I||| / A B C D 1. BH3-THF 2. H2O2, NaOH Br₂ H₂O OsO4 (catalytic) NMO RCO3H DoneIn an E2 mediated elimination reaction of an alkyl halide (H-X) using NaOCH3 as base, which of the following statement is not true? O The reactivity order for alkyl halides (RX) is tertiary secondary> primary. O The rate of reaction = k2 (alkyl halide] [NaOCH₂] O The reaction occurs in a single step. O The rate is independent of the leaving group.Answer the question below the reaction. ta The reaction above proceeds through which type of mechanism? SN2 SN1 E1 E2 OH + Excess NH4C1 H₂SO4 + H₂O
- 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.Nucleophilic aromatic substitution involves the formation of a resonance-stabilized carbanion intermediate called a Meisenheimer complex as the nucleophile attacks the ring carbon carrying the eventual leaving group; electron-withdrawing groups ortho and/or para to the site of attack help to stabilize this structure via resonance. For the reaction below, draw the structure of the stabilized reaction intermediate in the box below. CI F3C CF3 NO₂ F3C N CF3 NO₂ • You do not have to consider stereochemistry. • Draw the Meisenheimer complex with a formal charge of 0 on the nucleophilic atom. If more than one resonance structure is possible, only draw the most important one.What is the best reagent for carrying out the reaction shown below?
- b).. .. Under each potential product of this E2 elimination, write "major product," "minor product," or "not formed." Me Br H Me Me OH Me Ph Ph H Me H Et Me Me Me Ph Ph Me Me EtUnder second-order conditions (strong base/nucleophile), SN2 and E2 reactions may occur simultaneously and compete witheach other. Show what products might be expected from the reaction of 2-bromo-3-methylbutane (a moderately hindered 2°alkyl halide) with sodium ethoxide.What is the best way to remeber the differences between Sn1, Sn2, E1 and E2 reations?