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30) Which of the following is the most stable diene? L. IV. A)I B) C)III D)IV...
22. Which of the following compounds is(are) conjugated diene(s)? II III IV a. ll only b....
22. Which of the following compounds is(are) conjugated diene(s)? II III IV a. ll only b. I and III c. I and IV d. II, Ill, and IV 23. Vitamin D, has the following structure. Classify the circled pi-bond in vitamin D, as conjugated, cumulated or isolated a. Conjugated b. Cumulated c. Isolate 24. What is the IUPAC name for the following compound? a. (22,42,6E)-3,4,7-trimethylocta-2,4,6-triene b. (2,4,6E)-2,5,6-trimethylocta-2,4,6-triene c. (25,4Z)-3,4,7-trimethylocta-2,4,6-triene d. (48,6E)-2,5,6-trimethylocta-2,4,6-triene
Which of the following compounds would you expect to be antiaromatic? (i) cyclooctatetraene (ii) 1,3-cyclooctadiene (iii) cyclooctatetraenyl dianion (iv)
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?
21) Which of the following is not a nucleophile? A) Br B) FeBr3 C) NH3 D)...
21) Which of the following is not a nucleophile? A) Br B) FeBr3 C) NH3 D) - E) CH3OCH3 22) An unknown compound, C9H12, gave the following NMR spectrum: Triplet at 1.21 ppm (3H) Singlet at 2.30 ppm (3H) Quartet at 2.60 ppm (2H) Singlet at 7.04 ppm (4H) What is the structure of the compound? A CH,CH,CH, v. CHA CH; CH2CH3 СН3 V. CH CH3 CH CHCH3 СН3 CH3 A) 1 B) II C) III D) IV E) V
5) Which of the following is the most stable carbocation (circle one)? CН C—CH, IV I....
5) Which of the following is the most stable carbocation (circle one)? CН C—CH, IV I. CH—С-СH СHз CHCH-8 П. CH3 -СH -CH3 V. CHз—C Ш. 6) Which of the following is the most stable diene (circlde one)? IV I. V. П. Ш.
5. Which of the following carbocations is the most stable? (Hint: Find the ally carbocation) CH3CH2C-CH2...
5. Which of the following carbocations is the most stable? (Hint: Find the ally carbocation) CH3CH2C-CH2 CH3CH-CHCH2 6. What is the IUPAC name of the following diene? Cl 7. Which of the following are conjugated dienes? 12-ocadiene1,3-octadicne 2.5 octadiene .7 octadiene Which diene is conjugated? 8. What is the value of n from Huckel's rule for the following aromatic compound? How many t electrons are there is the annulene? The n value: (Hint: count the number of carbons, 4n+2 rule...
Which of the following pairs are resonance contributors? L CH2=CHCH and 11. and CH=CH OOH CH3-CH...
Which of the following pairs are resonance contributors? L CH2=CHCH and 11. and CH=CH OOH CH3-CH :0: III. and CH-- CH3 -C-H U :0: IV. CH3C-H and CH3-C-H 8 V. CH3-CH, and CHCHOH A) B) C) DIV EV
11. Identify the product(s) of the following reaction. A. I B. II C. III D. IV...
11. Identify the product(s) of the following reaction. A. I B. II C. III D. IV E. V Gom Do is a From co be on) porno porno olyan 12. What is the final product obtained when toluene is subjected to the following reaction sequence? i) Clz (large excess), heat, hv; ii) OH-/H20, heat; iii) H30+ A. I OH B. II OH COH C. III U OH D. IV E. V I II Hol YCC, III HOCCI3 C/ стон с...
) Which of the following is aromatic? IV. V. A) 1 B) II C) III D)...
) Which of the following is aromatic? IV. V. A) 1 B) II C) III D) IV E) V
12) Which diene would you expect to react most rapidly with maleic anhydride? CH3 CH3 CH3C...
12) Which diene would you expect to react most rapidly with maleic anhydride? CH3 CH3 CH3C CH3 CH3 CH3C IV a) I b) Ⅱ d) IV e)
c) III d) IV e) None of these choices 1) Which of h llwng would you...
c) III d) IV e) None of these choices 1) Which of h llwng would you espet to be aromaic IV b) II c) III d) IV e) All of these choices 12) Which of the following would you expect to be aromatic? IV non non c) III d) IV e) All of these choices. 13) Which of the following would you expect to be aromatic? IV a) I b) II
22. Which of the following compounds is(are) conjugated diene(s)? II III IV a. ll only b. I and III c. I and IV d. II, Ill, and IV 23. Vitamin D, has the following structure. Classify the circled pi-bond in vitamin D, as conjugated, cumulated or isolated a. Conjugated b. Cumulated c. Isolate 24. What is the IUPAC name for the following compound? a. (22,42,6E)-3,4,7-trimethylocta-2,4,6-triene b. (2,4,6E)-2,5,6-trimethylocta-2,4,6-triene c. (25,4Z)-3,4,7-trimethylocta-2,4,6-triene d. (48,6E)-2,5,6-trimethylocta-2,4,6-triene
21) Which of the following is not a nucleophile? A) Br B) FeBr3 C) NH3 D) - E) CH3OCH3 22) An unknown compound, C9H12, gave the following NMR spectrum: Triplet at 1.21 ppm (3H) Singlet at 2.30 ppm (3H) Quartet at 2.60 ppm (2H) Singlet at 7.04 ppm (4H) What is the structure of the compound? A CH,CH,CH, v. CHA CH; CH2CH3 СН3 V. CH CH3 CH CHCH3 СН3 CH3 A) 1 B) II C) III D) IV E) V
5) Which of the following is the most stable carbocation (circle one)? CН C—CH, IV I. CH—С-СH СHз CHCH-8 П. CH3 -СH -CH3 V. CHз—C Ш. 6) Which of the following is the most stable diene (circlde one)? IV I. V. П. Ш.
5. Which of the following carbocations is the most stable? (Hint: Find the ally carbocation) CH3CH2C-CH2 CH3CH-CHCH2 6. What is the IUPAC name of the following diene? Cl 7. Which of the following are conjugated dienes? 12-ocadiene1,3-octadicne 2.5 octadiene .7 octadiene Which diene is conjugated? 8. What is the value of n from Huckel's rule for the following aromatic compound? How many t electrons are there is the annulene? The n value: (Hint: count the number of carbons, 4n+2 rule...
Which of the following pairs are resonance contributors? L CH2=CHCH and 11. and CH=CH OOH CH3-CH :0: III. and CH-- CH3 -C-H U :0: IV. CH3C-H and CH3-C-H 8 V. CH3-CH, and CHCHOH A) B) C) DIV EV
11. Identify the product(s) of the following reaction. A. I B. II C. III D. IV E. V Gom Do is a From co be on) porno porno olyan 12. What is the final product obtained when toluene is subjected to the following reaction sequence? i) Clz (large excess), heat, hv; ii) OH-/H20, heat; iii) H30+ A. I OH B. II OH COH C. III U OH D. IV E. V I II Hol YCC, III HOCCI3 C/ стон с...
) Which of the following is aromatic? IV. V. A) 1 B) II C) III D) IV E) V
12) Which diene would you expect to react most rapidly with maleic anhydride? CH3 CH3 CH3C CH3 CH3 CH3C IV a) I b) Ⅱ d) IV e)
c) III d) IV e) None of these choices 1) Which of h llwng would you espet to be aromaic IV b) II c) III d) IV e) All of these choices 12) Which of the following would you expect to be aromatic? IV non non c) III d) IV e) All of these choices. 13) Which of the following would you expect to be aromatic? IV a) I b) II
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