7. Predict which position of the naphthalene compound below is the most reactive with electrophiles in electrophilic aromatic substitution. D OH A CH3 B C Explain your answer:
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- 1. Which of the following is the strongest nucleophile? Refer to the diagram below with an MeOH, MeSH, etc. 2. Which of the following is true about the stereochemistry of SN1 reaction?a.retention of configuration at the electrophilic centerb.50:50 mixture of retention and inversion of configuration at the electrophilic centerc.inversion of configuration at the electrophilic centerd. slightly more inversion than retention at the electrophilic centerThe compound below undergoes electrophilic aromatic substitution to form a monosubstituted product. At which position will the electrophile going to attack?Illustrate the resonance effect of the methoxy group -OCH3, on the structure of the benzene ring. Draw all the oissuvke resonance forms of methoxybenzene, including the hybrid Based on the structures, explain how the presence of the -OCH3 group affects: (i) the reactivity of the benzene ring towards electrophilic attack (ii) the orientation or point of attack of an incoming electrophilic reagent on the benzene ring.
- 6. List the following aryl halides from most to least reactive (in suzuki coupling): 2-bromotoluene, 3-bromotoluene, 4,-bromotoluene, 4-bromoanisole, 4-bromoacetophenone, 3-chlorotoluene, and 4-chloroacetophenoneQ4: Propose structure for compound that fit the following descriptions:a) An alkyl halide that gives a mixture of three alkenes on E2 reaction.b) An organo halide that will not undergo nucleophile substitution.c) An alkyl halide that gives the non-Zaitsev product on E2 reaction.d) An alcohol that reacts rapidly with HCI at 00C.In 1-methoxynaphthalene, the most probable sites during electrophilic aromatic substitution are: a. 2 and 3 b. 7 and 8 c. 2 and 4 d. 5 and 8 e. none of these
- The reaction below could run through both substitution and elimination reactions. 1. Provide the correct reagent to produce the products shown 2. State which mechanism(s) was followedRank in terms of reactivity towards the nucleophile. 1=least 4=most3-Bromocyclohexene is a secondary halide, and benzyl bromide is a primary halide. Both halides undergo SN1 substitution about as fast as most tertiary halides. Use resonance structures to explain this enhanced reactivity.
- What is the missing reagent needed to perform the following transformation? Assume mildly acidic catalysis. a) CH3NH2 b) CH2=NH c) (CH3)2NH d) CH3CH2NH2Rank the following compounds in order of increasing SN2 reaction rate with a good nucleophile. Explain yourreasoning. (CH3)2CHBr (CH3)3CBr CH3CH2Br CH3CH2Irank these from least to most reactive in nucleophilic acyl substitution with a nucleophile I)CH3COOC2H5 II) CH3COO-Na+ III)CH3COCl IV) CH3CONH2