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- Which is the major product of the reaction below? NaCN CN CH3CN (A) (B) OH CH2 HO OH (D) (C) CN он NC Compound B Compound C Compound A Compound DWhat is the product of this reaction?Consider the reaction scheme below. (i) H3COCHN CO₂Et A H₂N OH EtO OEt B C6H₁1 NO2 base Ha Identify the reagent(s) and conditions A and the intermediate B in this reaction scheme.
- 3A tautometric keto (A) – enol(B) equilibrium may be formulated as follows (A) (B) CH3 – COH ß-----------àCH2 – CHOH Given the following bond energies: C – H = 435kJ mol-1 C – C = 368 C==C = 610 C – O = 357 kJmol-1 C==O = 748 kJmol-1 O – H = 462 kJ mol-1 Calculate the enthalpy change in going from Keto form (A) to the enol form (B)(11) A OB C D A solution of which of the following alkyl halides in methanol will be optically active to begin but slowly lose most or all of its optical activity when heated? H H Br H3CBr Br (B) (A) T Br (C) (D)
- What is the major product of the reaction shown below? (1) NANH/NH3 (2) CH3CH,Br (A) (B) (C) (D) O Compound D O Compound A O Compound CWrite the mechanism, as well as the structure of intermediate A and product B, for the following reaction. -CO₂Me A OOH BWhich will produce the best yield of the Zaitsev alkene? O A B (B) (C) (D) Br Br Br Br NaOH NaOH H₂O KOC(CH3)3
- Ff.166.When treated with NaOH, the bromide below gives an alkene by the E2 mechanism, by elimination of the H atom indicated by the arrow: (a) Draw the Newman projection from which elimination takes place. (b) Draw the mechanism. (c) Draw the product with the proper stereochemistry. (d) Assign the proper stereochemical descriptor to the product. (e) Give the rate equationWhich of the following is a major product of the reaction shown below? он NaBH, (еxcess) OCH3 ELOH (A) (B) OH OCH3 но HO (C) (D) O Compound D Compound C OCompound A Compound B