tion 5 continued) c. Anthracene is known to act as the diene in Diels-Alder read as...
this the pre lab questions for The Diels - Alder Cycloaddition Reactio expirment please answer all the question If the Diels-Alder reaction is classified as a [4 + 2] cycloaddition reaction, how would you classify the cycloaddition reactions shown below? You are instructed to use 140 mg of cyclopentadiene (d = 0.80 g/mL). It is typically more convenient to measure out a volume of liquid. What volume of cyclopentadiene should be used? In the Diels-Alder reaction that you will be...
Draw and discuss the mechanism (with arrows to show electron movements) of the Diels-Alder reaction between anthracene and maleic anhydride. Draw the orientation and phases of the reacting p-orbitals showing how they overlap in a “suprafacial” geometry to form the product
a. Draw a curved arrow mechanism for the formation of the diels alder product you obtained by combining alpha-phellandrene and maleic anhydride. b. How many possible diels alder products could be formed in this reaction (draw them and state how they are related to each other)? c. Which one is formed as the major product in the reaction and why?
Questions 1. In Diels-Alder reactions, furan and maleic anhydride react quickly, while furan and 1 pentene react very slowly. Why might this be? The reaction between the diene and dienophile shown below gives the endo product. Show both the transition state and the product of the reaction 2. CN CN
Sort the dienophiles shown below by increasing reactivity in a Diels-Alder reaction with cyclohexa-1,3-diene. No - CN Bro. с в Cyclohexa-1,3-diene 01.0,A,C,B O 2.B,A,C,D O 3.C,B,D,A 4. B, A, D, C
(2) Diels-Alder reactions of a diene with a dienophile are known to undergo a concerted reaction. However, 2,3-Di- tert-1,3-butadene does not undergo Diels-Aider reactions. Explain 2,3-di-tert-1,3-butadiene (4) Propose mechanisms for the following steps 1 and 2. Slep 1 Step 2 Bry Br NaBH CH acetic acid (I) Using> as a symbol, rank the following alkyl bromides in order of decreasing reactivity. (6 pts) Br Cн,Br -Br (a) For hydrolysis by an Sy1 mechanism (b) For hydrolysis by an S,2 mechanism...
16.42 please I dont understand A and if you could show the resonance as well. thanks 16.41 The absorbance spectrum of 1,3-butadiene displays an absorp- tion in the UV region (Amax=217 nm), while the absorption spectrum of 1,2-butadiene does not display a similar absorption. Explain. 16.42 Predict the products for each of the following Diels-Alder reactions: O HOOO COOHD Hoocan MeO ON 16.43 Identify the reagents you would use to prepare each of the following compounds via a Diels-Alder reaction...
EXPERIMENT 2A DIELS-ALDER REACTION OF ANTHRACENE REFERENCES Pavia et al (4/e): Tech. 6.1/6.2, 7.2-7.4 Klein (1/e) pp. 784-792 EQUATION heat Diels-Alder Adduct 9,30-dihydroanthracene-9,10- endo-o B-seccinic anhydride mp 262264 PROCEDURE Place 0.200 grams of anthracene and an equal molar amount of maleic anhydride in 5 mL of xylenes in a 10-mL round-bottom flask with a magnetic stir bar. Attach a water-cooled condenser and reflux for 60 minutes. Allow the solution to cool to room temperature and then place the flask in...
Preform a Diels/Alder Reaction denophile poor diene do: EWG * you are to complete the assignment ON YOUR OWN * I don't want to see any copies (Directas. for each or given below: 8 W draw resonance that shows electronics at the D. A reactive carbons (C 6 label each reactont as the nucleophile or electrophile 6- Identify the 1 and 2 carbons where 1 is the nucleophilic carbon and a is the electrophilie carbon - redraw the reactants so...
4. Disnes undergo 1.2-addition OR 1,4-addition with FIX and X: The major product is determined by the temperature of the reaction notice how alkene shifted OR AB 1,2-addition 1.4.ddition when heated A) Drew mechanisms to account for all possible products (hox all final products). Explain which products will be favored at low temperatures, which at high temperatures H-C B) Draw the major product of the following reactions. 1 Bry -78 °C HCI 40 °C 65 5. Only s-cis dienes can...