4. Explain why maleic anhydride is exceptionally reactive and why anthracene is usually unreactive. Explain why did this Diels-Alder reaction proceed? Why does anthracene react from the central ring system and not one of the outer rings?
4. Explain why maleic anhydride is exceptionally reactive and why anthracene is usually unreactive. Explain why...
Diels-alder reaction lab Reaction: anthracene+ maleic anhydride <---> 9,10-Dihydroanthracene-9,10-α,β-succinic acid anhydride How would raising the temperature of the experiment affect product isolation? Would more or less product be expected, and why?
(Diels-Alder reaction of anthracene with malice anhydride) Calculate the percent yield of your product before and after recrystallization. Compare the percent yields and explain why they are not the same. 100 mg anthracene 55 mg maleic anhydride product before recrystallization: 0.083 g product after recrystallization: 0.038 g
POSTLAB QUESTIONS: 1) Explain why a 4M solution of maleic anhydride is made in CH2Cl2 and not in water. Show the reaction between maleic anhydride and water. 2) Give structures for the major Diels-Alder product of the following reactions: a) 1,3-cyclohexadiene and tetrachloroethene b) 1,3-cylcohexadiene and fumaric acid, the trans isomer of maleic acid 3) Identify the starting materials that can be used to produce the compounds shown using a Diels-Alder reaction.. COOH CO2CH3 CO2CH3
a) a-phellandrene combined with Maleic Anhydride (diels-alder) followed by NaOH produces one product. Treating with NaOCH3, followed by an acidic workup produces a new product. What is it's structure and why is not a good derivative to use to characterize the Diels-Alder product? b) Toluene in used as a solvent in these Diels-Alder reactions. Draw the Aiels-alder products from the reaction of toluene and maleic anhydride. Why is this product not formed during traditional Diels-Alder reactions?
- vivUINUAR 3) Why is cyclopentadiene more reactive ntadiene more reactive with maleic anhydride than with itself? chiral centers does endo-norbornene-cis-5,6-dicarboxylic acid possess? Is the 4) How many chiral centers does endo molecule itself chiral? (continued) 5) Endo-norbornene-cis-5,6-dicarboxylic acid can be converted back into its anhydride precursor by treatment with anhydrous acid. Propose a mechanism for this 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...
Critical Thinking Questions 1. Draw the structure for the product from the reaction of 1,3-cyclohexadiene and maleic acid (cis-2-butenedioic acid). 2. What is the product expected from the reaction of 1,3-butadiene and 3-sulfolene? Why is this not a major concern as a by-product? Part B, the dimer dicyclopentadiene is a possible contaminant of cyclopentadi- ene. It is also a diene. Can dicyclopentadiene undergo reaction with cyclopentadi- ene? Can dicyclopentadiene act as a diene and undergo reaction with the anhydride 3....
What is the objective of this experiment?
The reaction solvent for this experiment is xylene. What
property of this solvent makes it a better choice than toluene or
benzene?
Draw the orbitals involved in the 4+2 electrocyclization for
this reaction. Draw the structures of the reactants as best you
can. It may be appropriate to abbreviate the structure of
anthracene.
IR is not provided for this reaction product. Why is IR not
useful for monitoring the reaction or characterizing the...
This is from an organic chemistry diels-alder lab using
anthracene, maleic anhydride and xylenes. Can anyone tell me the
correct answers to all of these? For question 3 I need a method to
remove xylene and a method to remove acetone. Thank you!
CHM 20L Organic ll Lab Discussion and conclusion Provide responses to each of the following questions." Attach the 'H NMR spectrum for your product to respond to the following (on the spectrum, where appropriate) 1. Use the...
Please provide answers to the questions that are circled.
Thank you!
Least reactive Most reactive 12.53) A standard method for preparing sodium cyclopentadienide (C H Na) is by the reaction of cyclopentadiene with a solution of NaNH, in liquid ammonia. Write a net ionic equation for this reaction, identify the acid and the base, and use curved arrows to track the flow of electrons. 12.54 The same anion is formed by loss of the most acidic proton from 1-methyl-1,3- cyclopentadiene...