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- Reaction of p-cresol with two equivalents of 2-methylprop-1-ene affordsBHT, a preservative with molecular formula C15H24O. BHT gives thefollowing 1H NMR spectral data: 1.4 (singlet, 18 H), 2.27 (singlet, 3 H), 5.0(singlet, 1 H), and 7.0 (singlet, 2 H) ppm. What is the structure of BHT?Draw a stepwise mechanism illustrating how it is formed.Reaction of p-cresol with two equivalents of 2-methylprop-1-ene affords BHT, a preservative with molecular formula C15H24O. BHT gives the following 1H NMR spectral data: 1.4 (singlet, 18 H), 2.27 (singlet, 3 H), 5.0 (singlet, 1 H), and 7.0 (singlet, 2 H) ppm. What is the structure of BHT? Draw a stepwise mechanism illustrating how it is formed.Nucleophilic addition to ketone - Match the reagent with the reaction. (each used once) OH H3CO OCH3 OH HO. OH (A) (B) PPh3=CHCH3 1) CH3MgBr 2) H3O+ (C) CH3-OH (D) NaBH4 (E) 1) NaCN (aq) 2) H3O+ (F) H₂O OH CO₂H
- 2. Provide the structure of E-2,5-dimethyloct-5-enoic acid. 3. a. Name the structure with the following 'H NMR spectrum. 8 (ppm) = 12.71 (1H, s), 8.04 (2H, d), 7.30 (2H, d), 2.41 (3H, s)Identify products A and B from the given 1H NMR data. Treatment of CH2=CHCOCH3 with one equivalent of HCl forms compound A. A exhibits the following absorptions in its 1H NMR spectrum: 2.2 (singlet, 3H), 3.05 (triplet, 2 H), and 3.6 (triplet, 2 H) ppm. What is the structure of A?The following equation shows the reaction of trans-2,3-diphenyloxirane with hydrogen chloride in benzene to form 2-chloro-1,2-diphenylethanol. (a) How many stereoisomers are possible for 2-chloro-1,2-diphenylethanol? (b) Given that opening of the epoxide ring in this reaction is stereoselective, predict which of the possible stereoisomers of 2-chloro-1,2-diphenylethanol is/are formed in the reaction.
- Identify products A and B from the given 1H NMR data.a. Treatment of CH2 = CHCOCH3 with one equivalent of HCl forms compound A. A exhibits the following absorptions in its 1H NMR spectrum: 2.2 (singlet, 3 H), 3.05 (triplet, 2 H), and 3.6 (triplet, 2 H) ppm. What is the structure of A?b. Treatment of acetone [(CH3)2C = O] with dilute aqueous base forms B. Compound B exhibits four singlets in its 1H NMR spectrum at 1.3 (6 H), 2.2 (3 H), 2.5 (2 H), and 3.8 (1 H) ppm. What is the structure of B?When 2-methylcyclohexanone is treated with pyrrolidine, two isomeric enamines areformed.Why is enamine A with the less substituted double bond the thermodynamicallyfavored product? (You will find it helpful to examine the models of these twoenamines.)Addition of one equivalent of ammonia to 1-bromoheptane gives a mixture of heptan-1-amine,some dialkylamine, some trialkylamine, and even some tetraalkylammonium bromide.(a) Give a mechanism to show how this reaction takes place, as far as the dialkylamine.
- In an aqueous solution containing sodium bicarbonate, aniline reacts quickly withbromine to give 2,4,6-tribromoaniline. Nitration of aniline requires very strong conditions,however, and the yields (mostly m-nitroaniline) are poor.(a) What conditions are used for nitration, and what form of aniline is present under theseconditions?Although nitration of aniline is slow and gives mostly meta substitution, nitration of acetanilide (PhNHCOCH3) goes quickly and gives mostly para substitution. Use resonance forms to explain this difference in reactivityReaction of p-nitroaniline with sodium nitrite and hydrochloric acid at 0 °C, followed by treatment with N,N-diethylaniline.