QUESTION 10 Identify the product for the following sigmatropic rearrangement. O A. 0 B. II O...
Question 27 (2 points) Predict the reactants for the following Diels-Alder product: OB 0: ES ot O a) IV Ob) 11 Oc) d) III Question 28 (2 points) What are the expected major products of the reaction sequence shown below? 1. O3 2. H2O OH & O O=C=0 OH 11 IV V - a) I and IV Ob) II, III and IV O c) I and II d) I, III and IV
Multiple Choice, T/F Questions 1. Which of the following are TRUE (T) or FALSE (F) regarding Diels-Alder reactions? a) The reaction involves syn addition. _b) The reaction occurs in multiple steps. c) The reaction is a [4+2] A cycloaddition. d) The adduct formed fasted is the exo isomer. e) Electron donating groups activate the diene. f) Electron withdrawing groups activate the dienophile. 2. The compound at the right does not undergo Diels-Alder reaction because: a) ring systems cannot function as...
What is the correct classification of the following pericyclic reaction? X= heat O O A. electrophilic addition B. sigmatropic rearrangement O O O C. cycloaddition D. electrocyclic reaction E. C and D
Question 6 2 pts Which of the following cannot be a diene in the Diels-Alder reaction? ooooo III IV Il & IV O I&IV Only II Only IV Only! Only III II & III All the M.O.s of 1,3-butadiene are shown below. Which picture represents the Photochemically excited HOMO? 888 IV O IV O II
Question 11 Which diene reacts the slowest with cyclopentadiene in a Diels-Alder reaction? O IV
Predict the product for the following Diels-Alder reaction? 1. Predict the product for the following Diels-Alder reaction. COCH3 COCH3 CCH3 OCH3 OCH3 IV A) I B) II C) III IV E) None of these
When butadiene reacts with ethyne in a Diels-Alder reaction, what product is formed? O A. cyclohexa-1,4-diene OB. cyclohexyne OC. cyclohexene OD. cyclohexa-1,3-diene E. cyclohexane Reset Selection Question 4 of 10 1 Points How many nodes are in the highest energy MO for the allylic anion? OA. 1 OB.O OC. 2 OD. 3 Reset Selection
Question 31 (2 points) What are the expected major products of the reaction sequence shown below? 1. O 2. H70 OH o OH 11 III IV v Oa) I and IV ob) I and II oc) I, III and IV od) II, III and IV Question 32 (2 points) Which one of the following dienophiles is least reactive in the Diels-Alder reaction? NO, phony HCO 11 IV Oa) III ob) IV Oc) 1 od) 11
Question 7 Which diene and dienophile would react to give the following Diels-Alder product? wia 0:10:1 EN CH2CH3 IV NC
Question 21 (2 points) Which one of the following dienophiles is least reactive in the Diels-Alder reaction? OCH ОСН, Нco. IV a) b) III Oc)!! d) IV Question 22 (2 points) Which of the molecules below would be the expected product for the hydrogenation of the following alkene with Na and liq. NH3? Na NH v III IV a) Ob) II Oc) d) v Question 23 (2 points) Identify the final product for the following reaction. 1. BH3, THE 2....