Homework Answers
The amine acts a hardener in the formation of epoxy resin . In general, curing agent must have more than three active hydrogen atoms and two amino groups in a molecule so that the cured resin becomes crosslinked polymer, according to the reaction shown below.
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Give the purpose of the amine in the formation of the epoxy resin. O to chill...
48 .In the reaction to form an epoxy polymer, an amine reacts with an epoxide. Using...
48 .In the reaction to form an epoxy polymer, an amine reacts with an epoxide. Using arrows, show t movement of the first step of the reaction. Then, show the reaction to form the products of the reaction 5 o" R-N:
POLYSTYRENE: 1. Describe the resin before adding the polymerization catalyst. 2. What is the principle component...
POLYSTYRENE: 1. Describe the resin before adding the polymerization catalyst. 2. What is the principle component of this resin before polymerization? Draw its structure. 3. Describe the resin after hardening. 4. What is the principle component of this solid polymer? Draw its structure. 5. What is the initiator in this reaction? What is its purpose? NYLON-6,6: 1. Describe the rope formed (i.e. is it rigid or flexible, what is its color, etc.). White, opaque, flexible, tragile 2. What type of...
An abbreviated mechanistic description for DCC-mediated amide bond formation is illustrated as Path A. An alternative...
An abbreviated mechanistic description for DCC-mediated amide
bond formation is illustrated as Path A. An alternative
pathway for this process has been proposed as well, illustrated in
Path B. In this alternative pathway, a second molecule of
acid 1 out-competes the amine 4
for the pivotal activated acyl derivative 3,
leading to a transient symmetrical anhydride
7(with discharge of 6). In Path
B, anhydride 7 then is the active electrophile
that reacts with amine 4 to give the observed
amide...
9. Give the curved arrow mechanism for each reaction. H2SO4 b. H,o OH c. H20 H2SO...
9. Give the curved arrow mechanism for each reaction. H2SO4 b. H,o OH c. H20 H2SO d. OH H2o 10. For the following reaction, H,so, H,O он a. Give the curved arrow mechanism for the reaction, showing formation of both products b. Identify the major product and explain why it is favored. c. Draw the energy diagram for the formation of the major product. 11. Give the major organic product for the following reactions. If a racemic mixture is expected,...
O EtOCOET H N Eto EtOH Reactions of a primary or secondary amine with diethyl carbonate...
O EtOCOET H N Eto EtOH Reactions of a primary or secondary amine with diethyl carbonate under controlled conditions gives a carbamic ester. Write a detailed mechanism for this reaction (shown above) which proceeds in 4 steps, including proton transfer steps. Then draw Intermediate 3 in the window provided. The mechanism is detailed as follows: Step 1: Nucleophilic attack to yield zwitterion intermediate 1. Step 2: Protonation/deprotonation (i.e. "proton transfer") of zwitterion 1 to yield intermediate 2. Step 3: Intramolecular...
Discuss the purpose of the reaction. Discuss the function of the reagents used and what you...
Discuss the purpose of the reaction. Discuss the function of the
reagents used and what you are monitoring in that reaction.
JVCUDDL/64/1/649?response-content-dispositioninline Introduction: It is estimated that approximately 150 million metric tons of plastics are currently circulating in our global system of oceans and waterways. This seems like a fairly generic "big! number", and it's difficult to understand the scale of the problem without converting it to something more relatable. A standard empty plastic water bottle weighs approximately 12.7 g....
CHEM 242L Exp. 4 Report/ Synthesis of Oil of Wintergreen Name Score: 20 1) Assess the effectivene...
please answer all these questions, thank you.
CHEM 242L Exp. 4 Report/ Synthesis of Oil of Wintergreen Name Score: 20 1) Assess the effectiveness of the experiment and your technique by A) reporting the yield of each step in grams and percent as well as the overall percent yield (What is "overall percent yield?). SHOW ALL CALCULATIONS! B) Give a complete analysis of the identity and purity of your final product and any isolated intermediates 2 What was the purpose...
48 .In the reaction to form an epoxy polymer, an amine reacts with an epoxide. Using arrows, show t movement of the first step of the reaction. Then, show the reaction to form the products of the reaction 5 o" R-N:
POLYSTYRENE: 1. Describe the resin before adding the polymerization catalyst. 2. What is the principle component of this resin before polymerization? Draw its structure. 3. Describe the resin after hardening. 4. What is the principle component of this solid polymer? Draw its structure. 5. What is the initiator in this reaction? What is its purpose? NYLON-6,6: 1. Describe the rope formed (i.e. is it rigid or flexible, what is its color, etc.). White, opaque, flexible, tragile 2. What type of...
An abbreviated mechanistic description for DCC-mediated amide
bond formation is illustrated as Path A. An alternative
pathway for this process has been proposed as well, illustrated in
Path B. In this alternative pathway, a second molecule of
acid 1 out-competes the amine 4
for the pivotal activated acyl derivative 3,
leading to a transient symmetrical anhydride
7(with discharge of 6). In Path
B, anhydride 7 then is the active electrophile
that reacts with amine 4 to give the observed
amide...
9. Give the curved arrow mechanism for each reaction. H2SO4 b. H,o OH c. H20 H2SO d. OH H2o 10. For the following reaction, H,so, H,O он a. Give the curved arrow mechanism for the reaction, showing formation of both products b. Identify the major product and explain why it is favored. c. Draw the energy diagram for the formation of the major product. 11. Give the major organic product for the following reactions. If a racemic mixture is expected,...
O EtOCOET H N Eto EtOH Reactions of a primary or secondary amine with diethyl carbonate under controlled conditions gives a carbamic ester. Write a detailed mechanism for this reaction (shown above) which proceeds in 4 steps, including proton transfer steps. Then draw Intermediate 3 in the window provided. The mechanism is detailed as follows: Step 1: Nucleophilic attack to yield zwitterion intermediate 1. Step 2: Protonation/deprotonation (i.e. "proton transfer") of zwitterion 1 to yield intermediate 2. Step 3: Intramolecular...
Discuss the purpose of the reaction. Discuss the function of the
reagents used and what you are monitoring in that reaction.
JVCUDDL/64/1/649?response-content-dispositioninline Introduction: It is estimated that approximately 150 million metric tons of plastics are currently circulating in our global system of oceans and waterways. This seems like a fairly generic "big! number", and it's difficult to understand the scale of the problem without converting it to something more relatable. A standard empty plastic water bottle weighs approximately 12.7 g....
please answer all these questions, thank you.
CHEM 242L Exp. 4 Report/ Synthesis of Oil of Wintergreen Name Score: 20 1) Assess the effectiveness of the experiment and your technique by A) reporting the yield of each step in grams and percent as well as the overall percent yield (What is "overall percent yield?). SHOW ALL CALCULATIONS! B) Give a complete analysis of the identity and purity of your final product and any isolated intermediates 2 What was the purpose...
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