DA rxn

Question 1

What is the reflux temp of a DA rxn?

Question 2

You make a mistake and only count 30 min from the time you started heating, not from the time reflux started. Which of the following could be a consequence of that mistake?

Answer 2

Reduced yield/incomplete rxn

Question 3

Is a mixture of isomers expected from DA rxn?

Answer 3

No

Question 4

Acid anhydrides are an electrophilic functional group. This property can be used to deactivate harmful reagents once the reaction is done and separate them from your products using an aqueous extraction, as seen in the Electrophilic Aromatic Substitution experiment. Maleic anhydride is an acid anhydride. Would it be reasonable to use an aqueous extraction to remove unreacted maleic anhydride from the crude product?

Answer 4

No, an aqueous extraction is not a reasonable purification method

Question 5

Your reaction is refluxing steadily so you use this time to investigate a proper TLC eluent. Your first eluent gives you a RF value for anthracene of 0.92. What should you do?

Answer 5

Reduce polarity

Question 6

What do you add more of to make an eluent more polar?

Answer 6

ethyl acetate

Question 7

What’s your target RF?

Answer 7

.8