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Question 15 Which of the following would undergo epimerization in base? You ☺ II III IV...
Question 1 Which of the following hydrogens is the most acidic? II IV I III A. IV B. V C. III D.I E. II Question 2 What is the product, Z, of the following reaction sequence? iz H30+ T-H20)* ia. CI H307 + Z مل I II III IV A. IV B. II C. III D.V E.
Which of the following compounds would you expect to be antiaromatic? (i) cyclooctatetraene (ii) 1,3-cyclooctadiene (iii) cyclooctatetraenyl dianion (iv) 1-ethenylcyclooctatetraene (v) 1,3,5,7-octatetraene Select one: a. i only b. i, ii, iv and v only c. iii only d. i and iv only e. all the above From my working I found i, ii, iv, and v to be non aromatic and iii to be aromatic. Is non aromatic the same as antiaromatic?
Question 17 The correct structure for ethyl 3-methylbutanoate is: lyhyby III IV V A. III B. C. V DIV E. II Question 18 Considering only the highlighted hydrogens, list the following compounds in order of decreasing acidity: && und III IV A. V, IV, III, II, 1 B. III, I, II, V, IV C. I, II, III, IV, V D. IV, V, II, I, III E. III, V, IV, 1, 11
Question 19 Which is the most acidic hydrogen in the compound shown? II IV H H H H H -H H T III V CA. V B. C. IV D. III E. 11 Question 20 How many signals would you expect to find in the TH NMR spectrum of CH 30CH 2 CH 2OCH 3? CA. 4 B. 2 C. 1 D.3 E. 5
Question 33 The correct structure for ethyl 2-chloropentanoyl chloride is: o OH CI CI ОН OH I II III "CI CI CI IV V A. II B. I C. IV D.V E. III Question 34 A compound with the molecular formula Cg4 gBro gave the following H NMR spectrum: triplet, 5 1.4 quartet, 8 3.9 multiplet, 5 7.0 (4H) There was no evidence of an -OH band in the IR spectrum. A possible structure for the compound is: Br Br...
Question 7 (2 points) Which of the following dienes can undergo the Diels-Alder reaction? II III IV a) 11 Ob) III Oc) Od IV Question 8 (2 points) How would you use 'H NMR spectroscopy to distinguish between the following compounds based on the benzene ring protons? II O O a) Benzene protons for I show up between 6.0 - 7.0 ppm and Il between 7.0 - 8.0 ppm Ob) Benzene protons for I show up between 7.0 - 8.0...
3. Rank in order of decreasing basicity: HC=C: CHCHO CHC HINO H₂C=Cif I III IV V A. III >I>V > II > IV D. III > IV > II >V>I B. III > V > IV >> II E. IV > II >I> III > V C. V>I> III > II > IV
5. Which one of the following is nonaromatic? III IV I II A. IV B. I C. II D. III E. None 6. Which is the correct bond order for the C-C bonds in benzene? 1.0 20 1.25 1.75 1.5 1.5 20 10 A. III B. C. IV D. II E. None
2014 I 31 2017 I 69 II 24 II 54 III 23 III 46 IV 16 IV 32 2015 I 42 2018 I 82 II 35 II 66 III 30 III 51 IV 23 IV 38 2016 I 53 2019 I 91 II 45 II 72 III 39 III 59 IV 27 IV 41 Create a multiple regression equation incorporating both a trend (t=0 in 2013: IV) and dummy variables for the quarters. Let the first quarter represent the reference...
12. Which of the following is/are correct resonance structure(s) for compound A? A) III and IV B) I and II C) I and IV D) II and III E) I and III