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Tvas - XC Question 17 Which of the following is the most stable enol form of...
Which of the following is the most stable enol form of 1,3-cyclohexanedione?
What is the most stable enol form of 1,3-cyclohexanedione?
Question 3 Which of the following is a keto-enol tautomeric pair? OH OH OH and and o and COM OH I II III он OH a and a and IV CA. 1 B. V C.II D. IV E. III Question 4 What would be the major product of the following reaction sequence? он PCC 1. LDA(-78C) 2. CHCHOI ? CH C1 HO వరలో I II MI o IV A. II B. I C. V D. III E. IV
Which of the following is the structure of the most stable enol form of 2-methylpentan- 3-one? он ОН о ОН ОН
Identify the most stable enol form of the following monosaccharide. Which of the following statements about the reduction of D-galactose with NaBH_4 is correct? The resulting product is the optically inactive aldonic shown in structure III. The resulting product is the optically inactive aldaric acid shown in structure I. The resulting product is the optically active alditol shown in structure II. The resulting product is the optically inactive alditol shown in structure II. The resulting product is the optically active...
34 Which of the following is the highest energy conformer of 2,3-dimethylbutane HCH, I M V Ho CH ) Ho Ho O Ho HC not A) 1 B) II C) III D) IV 35) - 35) Which of the following chair conformations represents trans-1,3-dimethylcyclohexane? " DIV" C) III B) II 36) Which of the following is the most stable conformation of cis-1-ethyl-3-isopropyleyclohexane? A) B) II 37) Select the most stable conformer of cis-1,3-cyclohexanediol HO dis-1,3-cyclohexanediol но Тон OH OH HO...
explain 21. Which of the following represent the enol form of the following molecule? OH OH cox cox B)11, CI DIVE) None of the above III IV 4)1 A) I B) II C) III D) IV E) None of the above
What is the IUPAC name of the following compound? 4 Rank the following alkenes from most to least stable. ОН OH ОН IX M A. I > || > III B. I > III > 11 C. II > III > 1 D. III > II > Which carbon would form the most stable carbocation? A D В С Which of the following is a wax at room temperature? A. B. C. D. E. None of these
Which of the following is an enol tautomer for the ketone listed at right? OH ОН OH (a) i only (b) ii only (C) iii only (e) i and iii
QUESTION 43 Which of the following is most stable? 11 III IV 0 0 0 0 ON LECTION 44 QUESTION 44 What is the most likely product of the reaction below? 1. LDA i 2. 3. H2O II HO IV QUESTION 45 Which reactant, reagent and conditions will give the best yield of (R)-butan-2-ol? (S)-butan-2-ol with NaOCH3 CH3OH (5)-butan-2-ol with 1) TSCI, pyridine followed by 2) NaOCH3 CH3OH (S)-butan-2-ol with 1) Nah followed by 2) CH3Br (R)-butan-2-ol with 1) TsCl,...