Which of the following is an enol tautomer for the ketone listed at right? OH ОН...
37) Identify the enol tautomer of the following compound. 37) 0 OH OH IV A) I B) II C) III D) IV
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
The alpha-carbon in the enol tautomer of a carbonyl compound is: a. nucleophilic b. electrophilic c. amphiphilic d. sp2 hybridized as the ketone tautomer e. sp3 hybridized as the enol tautomer
Using the compound bank below, indicate the keto or enol tautomer of the given compound. Write the letter that corresponds to your answer in the blank. NOTE: refer to the bank for both the structures of the given and its tautomer. If the tautomer is not included in the bank then write NONE. A D H ОН OH como . B E H к ОН OH -OH OH C F L oi H di tautomer of compound A= tautomer of...
All of the compoung hown below have an enol tautomer. Which compound's enol exists in the highest percentage enol form? Q Zoom B С D E MULTIPLE CHOICE OH b с d Q Zoom
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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
Tvas - XC Question 17 Which of the following is the most stable enol form of 1,3-cyclohexanedione? HO I. ОН HO IV. HO OH II. V. HO HO ОН III. O1 11 111 IV V SAMSUNG
Question 6 Which of the following structures is m-methylphenol? ОН •OH -OH -OH M III Both I and III are m-methylphenol. Both II and IV are m-methylphenol. Only Iis m-methylphenol. Only III is m-methylphenol. Previous
4. Which tautomer of phenol is favored and why? A. enol, better hydrogen bonding C. keto, better CO resonance B. enol, aromaticity D. 1:1 both keto and enol forms are favored 5. Which base will completely and irreversibly form the enolate of the compound shown?: ? A. KOH B. NaOH C. NHS D. NaNH2
4. Which compound would give the following IR spectrum? TIRNSMITTANCES ОН ОН If unw ОН D 5. Which compounds contain stereocenter(s)? OH NII a) I, III, and V b) I, II, and V c) II, III and IV d) II, IV, and V