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- Rate the following compounds in order of increasing basicity. NHz NH2 CH3-C NH, (X) (Y) (Z) (a) XThe structure of an ester could either be A or B: CH3 O O CH3 T || -C-OCH3 CH3-C CH3-C-O-C-CH3 CH3 CH3 A B Its ¹H NMR spectrum consists of two peaks at 80.9 and 83.6 (relative areas 3:1). Which compound is it? Describe the spectrum that would be expected if it had been the other ester.What is the major product of the reaction shown below? (1) Li (2) H*/H2O (A) (B) OH (C) (D) OCompound A ) Compound D Compound B Compound CWhich one of the following molecules can serve as a Michael acceptor? (a) (b) (c) (d) CH30 O Answer (a) Answer (b) Answer (c) O Answer (d) QUESTION 2851. Which is NOT a valid resonance structure for the conjugate base of this molecule? (A) (C) OEt (C) :0: : OEt (+) HBr ROOR ü (B) OCH 3 (D) 52. What is the major product of this reaction sequence? o Mg ether (A) (B) :0: (D) H OEt OEt H OEt X CH31 LOH LOCH₁Draw the correct products for the following reaction. (1)1,, NaOH (2) н,о"Give the reagents excess 1) CH3 Ms Br a) 2) H30+ لاط Ho H2504 it '애 2)2 CH 3 Ms Br 3) H30+ c) 1) 2 eg CH3 My Br 2) H30tRank the basic sites in each of the following molecules from most (1) to least (5) basic. НО A В C D E D В C E A > > > > >O(A) O (B) DO P (D) PE Question 4 4) Indicate the correct stereochemical configuration (R or S) for each stereogenic center in the molecule shown in the Box below: O (A) O (8) (C O (D) O (E) Br OH A) (2R, 3R) B) (2R, 3S) C) (2S, 3R) D) (2S, 3S) E) Molecule does not contain any stereogenic centersCI NH2 2 3 NH2 Choose the correct reagents from the following list: A В C excess Cl2, AICI3 1) (CH3)3CCI, AICI3 2) Fuming H2S04 (CH3)3CCI, AICI3 D E F KMNO4, NaOH heat Dilute H2SO4, Cl2 1) HNO3, H2SO4 2) Zn, HCI Enter the correct letters in the boxes given below. (Reagents cannot be used more than once) Reagent 1: Reagent 2: Reagent 3:F1 1) Which of the following molecules DOES NOT have a stereogenic center in the S configuration: CO₂H -H -H @ 2 O (A) O (B) O (C) O (D) O (E) W Br F2 (A) # 3 E 80 F3 $ 4 R (B) Q F4 % 5 OH 9 F5 T 6 CI (C) F6 Y & 7 F7 U CI H * 8 CH3 (D) DII F8 All molecules have a stereogenic center in the S configuration (E) 9 F9 F10 0 0 P F11(S,S)-tartaric acid has a pKa₁ of 2.98 and pKa2 of 4.45. When treated with 1 equivalent of NaOH, either proton A or proton B can be removed. What is the relationship between the two possible mono-deprotonation products? HO OH H HO₂C CO₂H 1 Î A B Constitutional isomers Diastereomers Enantiomers IdenticalSEE MORE QUESTIONS