4. Which of the following has the least ring strain? IV d. IV а. I b...
4. Which of the following has the least ring strain? d.lv bil . av ev C. III 5. Which structure best represents the following disubstituted cyclohexane? 5. which is 6. Which of the following chair conformation is lowest in energy? fatto og Å HA a. 1 d. IV b. II e. v C. III 7. Which of the following is chiral? a a sock da Piece of string ba spoon e. a cartire can ear 18. How many chiral centers...
Which of the following cycloalkanes has the least angle strain? IV I II III IV
Which of the following compounds is least acidic? a. I b. II c. III d. IV e. V HBr HCI NH3 ?? IV
Which of the following compounds would be most reactive to ring bromination? A) I B) II C) III D) IV E) V СЕЗ CF CI NHz CH3 NOz
Which of the following structures contains a primary amine? NH2 NH NH2 IV Select one: а. b. II c. IV d. I Which of the following structures contains a secondary amine NH2 NH NH2 IV II Select one: a. IV b. II c. I d. IlIl Which of the following structures contains an alkene? II IV Select one: а. I b. IV c. III d.I Which of the following structures contains an amide? NH2 NH NH2 IV Select one: а....
please help! 4. Which of the following could be antiaromatic (assuming sp' hybridization)? A. IV B. I C. III D. II E. None I III IV A. IV B. I c. II D. III E. None 6. Which is the correct bond order for the C-C bonds in benzene? A. III B. C. V D. II E. None 2
тон IN OH А) І B) II C) III D) IV E) V
4. Rank the following compounds from least to most basic. V. iv. lii il. NH2 A. i< iv < iii< v< i B. ii< v< iv < ii < i C. i< ii< ii < iv <v D. i< iv<v<ii < ii 4. Rank the following compounds from least to most basic. V. iv. lii il. NH2 A. i
19. Which of the following molecules are achiral? A) II, III B) I, II C) I, IV D) III, IV 20. How many stereogenic centers are present in ephedrine, a bronchodilator and decongestant? ephedrine A) 0 B) 1 C) 2 D) 3 21. Rank the following groups in order of decreasing priority according to the Cahn-Ingold- Prelog system. -NH2 -NHCH3 -CH2NH2 CH2NHCH3 п V . A) B) I>II> III > IV II >I>IV > III II C II >I> III...
30) Which of the following is the most stable diene? L. IV. A)I B) C)III D)IV E) V 31) Which of the following is an aromatic hydrocarbon? IV -CH A)I B C)ID)IVE) V 32) Which of the following conjugated dienes will not react with a dieneophile in a Diels-Alder reaction? Π. IV A) I B)11 C)111 D) IVE) I and III 33) The conjugate acid of the compound shown below is B) aromatic D) antiaromatic. E) none of the above....