Homework Answers
If Diels Alder reaction product recrystallized in toluene,
then anhydride will not hydrolysed to corresponding acid without acidic condition.
Melting point of crude compound (240-250oC) will changed to 262 - 264oC due to purity increased. Impure compound always have less melting point than its pure form. Hence this is correct option.
After recrystalization, purity is increased, hence melting point will never decreased.
Recrystalization never push equilibrium.
Add Answer to:
For the Diels Alder lab, you recrystallized your product in toluene. Which of the following do...
(Diels-Alder reaction of anthracene with malice anhydride) Calculate the percent yield of your product before and...
(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
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)...
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...
Diels-Alder Post-lab (1) - Compatibility Mode Layout References Mailings Review View Help Search Please write the...
Diels-Alder Post-lab (1) - Compatibility Mode Layout References Mailings Review View Help Search Please write the answers to the following questions directly in your notebook. 1. Discussion of the Diels-Alder reaction performed, including the calculated percent yield and comments on purity based on the product literature melting point. 2.79 g hand), then invert back d clamp), but don't turn spatula so as to make m flask (Rb Fk) such as as Beaver imducand ainwand empr: 29.95 c anhydride (cis- (1st,...
I need help calculating theoretical yield for my Diels-Alder lab experiment. This reaction was between 1,3-butadiene...
I need help calculating theoretical yield for my
Diels-Alder lab experiment. This reaction was between 1,3-butadiene
and maleic anhydride, forming cis 1,2,3,6-tetrahydrophthalic
anhydride. In this experiment 1.0g of maleic anhydride was combined
with 1.8g 3-sulfolene and 2 mL dry xylene and refluxed for 30 mins.
6 mL of xylene was added to dissolve solids and then decanted, then
warm pet. ether was added to form crystalline product after
cooling. some of this info may be irrelevant in what is needed...
for this experiemt, in the ir spectrum result how do you identify the peaks and which compunds are present here? T...
for this experiemt, in the ir spectrum result how do you
identify the peaks and which compunds are present here?
The Diels-Alder Reaction of Anthracene with Maleic Ankydride The Diels-Alder reaction is a member of a class of reactions called cycloadditions. The reaction involves threex bonds, two from the dicne and one from the dienophile in a concerted reaction to form a six-membered ring. Since the reaction involves four n clectroes in the dicne and twor clostrons from the dienophile,...
for this experiment i got a yield of 0.93g how do you and what is the...
for this experiment i got a yield of 0.93g
how do you and what is the theoretical and percentage
yield?
The Diels-Alder Reaction of Anthracene with Maleic Ankudride The Disco Alder reaction is a member of a class of reactions called cycladditions. The reacties wolves three x bonds, two from the diene and one from the dicnophile in a concerted reaction to Come six-memberedning Smce the reaction involves four electroes in the dienendo slectrons from the dicasphile, it is sometimes...
Write out your separation scheme for this experiment. 1. Heat 75 mL of water to 90...
Write out your separation scheme for this experiment. 1. Heat 75 mL of water to 90 °C in a 250-mL beaker. 2. While the water is being heated, place 250 mg of salicylic acid, 1 drop of 85% phosphoric acid and 0.5 mL of acetic anhydride in a test tube. Add a boiling chip to the mixture and gently shake it in order to mix the reactants. 3. Heat the tube in the beaker of water at 85 - 90...
What is the objective of this experiment? The reaction solvent for this experiment is xylene. What...
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...
1) Which reactant, salicylic acid or acetic anhydride, is in excess? Show your work. 2) If you we...
1) Which reactant, salicylic acid or acetic anhydride, is in
excess? Show your work.
2) If you were to use 3.17 g of starting material, how much
product would you expect? Again, show your work.
3) Why is phosphoric acid added to the reaction?
4) A small amount of water is added at the end of the reaction
to react with the excess acetic anhydride. Show a balanced equation
for that reaction.
5) Explain the purpose of the FeCl3 test...
Synthesis of dimedone This lab exercise will give you practical experience with the generation of...
Synthesis of dimedone This lab exercise will give you practical experience with the generation of a malonic ester enolate and subsequent reaction with an a,p-unsaturated carbonyl compound. This sequence is known as the Michael reaction. In the presence of sodium methoxide, dimethyl propanedioate (malonic ester/dimethyl malonate) is converted to the corresponding enolate anion and reaction with 4-methylpent-3-en-2-one (mesityl oxide) affords the Michael adduct 1, as shown in the reaction sequence below. Under the basic reaction conditions, the Michael adduct 1...
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...
Diels-Alder Post-lab (1) - Compatibility Mode Layout References Mailings Review View Help Search Please write the answers to the following questions directly in your notebook. 1. Discussion of the Diels-Alder reaction performed, including the calculated percent yield and comments on purity based on the product literature melting point. 2.79 g hand), then invert back d clamp), but don't turn spatula so as to make m flask (Rb Fk) such as as Beaver imducand ainwand empr: 29.95 c anhydride (cis- (1st,...
I need help calculating theoretical yield for my
Diels-Alder lab experiment. This reaction was between 1,3-butadiene
and maleic anhydride, forming cis 1,2,3,6-tetrahydrophthalic
anhydride. In this experiment 1.0g of maleic anhydride was combined
with 1.8g 3-sulfolene and 2 mL dry xylene and refluxed for 30 mins.
6 mL of xylene was added to dissolve solids and then decanted, then
warm pet. ether was added to form crystalline product after
cooling. some of this info may be irrelevant in what is needed...
for this experiemt, in the ir spectrum result how do you
identify the peaks and which compunds are present here?
The Diels-Alder Reaction of Anthracene with Maleic Ankydride The Diels-Alder reaction is a member of a class of reactions called cycloadditions. The reaction involves threex bonds, two from the dicne and one from the dienophile in a concerted reaction to form a six-membered ring. Since the reaction involves four n clectroes in the dicne and twor clostrons from the dienophile,...
for this experiment i got a yield of 0.93g
how do you and what is the theoretical and percentage
yield?
The Diels-Alder Reaction of Anthracene with Maleic Ankudride The Disco Alder reaction is a member of a class of reactions called cycladditions. The reacties wolves three x bonds, two from the diene and one from the dicnophile in a concerted reaction to Come six-memberedning Smce the reaction involves four electroes in the dienendo slectrons from the dicasphile, it is sometimes...
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...
1) Which reactant, salicylic acid or acetic anhydride, is in
excess? Show your work.
2) If you were to use 3.17 g of starting material, how much
product would you expect? Again, show your work.
3) Why is phosphoric acid added to the reaction?
4) A small amount of water is added at the end of the reaction
to react with the excess acetic anhydride. Show a balanced equation
for that reaction.
5) Explain the purpose of the FeCl3 test...
Synthesis of dimedone This lab exercise will give you practical experience with the generation of a malonic ester enolate and subsequent reaction with an a,p-unsaturated carbonyl compound. This sequence is known as the Michael reaction. In the presence of sodium methoxide, dimethyl propanedioate (malonic ester/dimethyl malonate) is converted to the corresponding enolate anion and reaction with 4-methylpent-3-en-2-one (mesityl oxide) affords the Michael adduct 1, as shown in the reaction sequence below. Under the basic reaction conditions, the Michael adduct 1...
Most questions answered within 3 hours.
-
Why did so many investment banks have to start buying CDO’s and
other mortgaged backed securities...
asked 9 minutes ago -
The mean cost of domestic airfares in the United States rose to
an all-time high of...
asked 20 minutes ago -
1.Magazine Luiza is a Brazilian retail chain for consumer
electronics. The company currently has 100 stores...
asked 18 minutes ago -
What is the molarity of ZnCl2 that forms when 25.0 g of zinc
completely reacts with...
asked 20 minutes ago -
For independent X and Y, we have probability density function
for them where pdf of X...
asked 30 minutes ago -
The decomposition of SO2Cl2 is first order in SO2Cl2 and has a
rate constant of 1.42...
asked 27 minutes ago -
How do I convert from volume percent to mole percent in the
distillation lab? ethy acetate...
asked 33 minutes ago -
8. An air-plane has an effective wing surface area of 14.0 m²
that is generating the...
asked 34 minutes ago -
A railroad worker was a person who worked on setting and moving
railroad tracks. In securing...
asked 33 minutes ago -
using RECURSIVE Functions in Java, create a public static String
doubleLetters (String word)
For ex) that...
asked 40 minutes ago -
With a $16 Trillion national ebt, and projected annual budget
eficits in excess of $1 Trillion...
asked 54 minutes ago -
A machine shop owner wishes to assign each of three machinists
(labeled 1, 2, and 3)...
asked 1 hour ago