Homework Answers
Note: Iron(II) or Fe2+ plays the role of catalyst in speeding up the reaction.
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2) The reaction between 4,4'-methylenedianiline and 2-pyridinecarboxaldehyde in methanol is very slow (days). Howev...
2. Consider the Sw1 reaction between 2-bromo-2-methylpropane and methanol at 50 °C. НАС Br H2CH3 Сн,он...
2. Consider the Sw1 reaction between 2-bromo-2-methylpropane and methanol at 50 °C. НАС Br H2CH3 Сн,он 50 °C н, с осна HCCHE a. Which molecule (or ion) is serving as the nucleophile in this reaction? b. Which molecule (or ion) is serving as the electrophile in this reaction? C. Which molecule (or ion) is serving as the leaving group in this reaction? d. What is the rate law for this reaction? e. Draw the structure of the intermediate that is...
QUESTION 4 [1,2- versus 1,4-Addition Reactions] 4.1 Propose a detailed mechanism for the reaction of 2-butenal...
QUESTION 4 [1,2- versus 1,4-Addition Reactions] 4.1 Propose a detailed mechanism for the reaction of 2-butenal with ethynylmagnesium bromide in dry THF followed by quenching with dilute aqueous acid. (5) 4.2 Propose a plausible mechanism for the reaction of 1,3-diphenyl-2-propen-1- one with potassium cyanide in ethanol followed by aqueous work-up. 1 (5) 4.3 Predict and draw the structure of the product of the reaction of 2-methyl-1,3- cyclohexanedione with methyl vinyl ketone (3-buten-2-one) in methanol in the presence of potassium hydroxide....
In the lab, Cassandra the Chemist™ studied the reaction between 2-bromo-3-methyl pentane with a base under...
In the lab, Cassandra the Chemist™ studied the reaction between
2-bromo-3-methyl pentane with a base under the presence of heat.
During her studies, she found that the reaction rate doubled when
she doubled the amount of the base. Draw a full, arrow-pushing,
mechanism of the above reaction showing the most prevalent product
formed.
11. (22 pts) In the lab, Cassandra the Chemist"M pentane with a base under the presence of heat. During her studies, she found that the reaction studied...
Gradescope #2 This question is worth 10 points. The reaction between (R)-2-bromo-3-methylbutane and water in the...
Gradescope #2 This question is worth 10 points. The reaction between (R)-2-bromo-3-methylbutane and water in the presence of heat forms Br. H30* and two organic products. Draw a stepwise mechanism for this reaction, clearly showing how each product is formed. Use curved arrows to show electron movement, and include all reactive intermediates, resonance structures, etc. Br H20
2. The reaction below is catalyzed by the CK enzyme: NH O | NHA | СК...
2. The reaction below is catalyzed by the CK enzyme: NH O | NHA | СК O= H₂N Ņ coo eo T N con + ATP + ADP Below is a picture of the active site for this enzyme. The red atoms are the amino acids in the CK protein. The blue structure is the substrate, the orange is the phosphate end of ATP. All dashed lines are showing interactions and the curved arrows are showing the mechanism. The wavy...
Gradescope #2 This question is worth 10 points. The reaction between (R)-2-bromo-3-methylbutane and water in the...
Gradescope #2 This question is worth 10 points. The reaction between (R)-2-bromo-3-methylbutane and water in the presence of heat forms Br", H3O+ and two organic products. Draw a stepwise mechanism for this reaction, clearly showing how each product is formed. Use curved arrows to show electron movement, and include all reactive intermediates, resonance structures, etc. Br H2O Δ
2. The reaction below is catalyzed by the CK enzyme: NH2 OP H2N H₂N N Ń...
2. The reaction below is catalyzed by the CK enzyme: NH2 OP H2N H₂N N Ń cooK COO - INN CO + ATP + ADP Below is a picture of the active site for this enzyme. The red atoms are the amino acids in the CK protein. The blue structure is the substrate, the orange is the phosphate end of ATP. All dashed lines are showing interactions and the curved arrows are showing the mechanism. The wavy lines indicate that...
2. If the reaction between iron(III) ion and thiocyanate ion yielded an equilibrium concentration of 0.30...
2. If the reaction between iron(III) ion and thiocyanate ion yielded an equilibrium concentration of 0.30 M for each of these ions, what is the equilibrium concentration of the red iron(III)-thiocyanate complex? (Hint: The equilibrium constant for the reaction is in the Background section.) Show your work 3. In the reaction below, NH3(g) + H2O(1) - NH; +H30+ the equilibrium constant is 10-34. Is this reaction likely to take place? Explain your answer. iron(III) and thiocyanate ions, the equilibrium expression...
2. Consider the reactions 1 and 2 shown below. Indicate how the reaction rate for each of the reactions will change...
2. Consider the reactions 1 and 2 shown below. Indicate how the reaction rate for each of the reactions will change your options are: increase, decrease, does NOT change) when the following modifications to the reactions and conditions are introduced: reaction 1 reaction 2 Br CH30 Na CH3OH CH OH as solvent CH3OH is also solvent A. The reaction temperature for both reactions is increased. B. The concentration of the reagent shown above the arrow is increased. C. The concentration...
Pre-Lab Assignment 1) Draw the reaction mechanism for the reaction. 2) Determine the limiting reagent. Procedure...
Pre-Lab Assignment
1) Draw the reaction mechanism for the reaction.
2) Determine the limiting reagent.
Procedure 1 Place approximately 1 g of stilbene dibromide prepared in last week's experiment in a 50 mL round bottom flask. Record the exact mass. Add 0.8 g of KOH and 4 mL of triethylene glycol from the syringe provided in the fume hood (rinse any crystals from the sides of the flask while adding triethylene glycol). 2 Heat the stirred reaction mixture to a...
2. Consider the Sw1 reaction between 2-bromo-2-methylpropane and methanol at 50 °C. НАС Br H2CH3 Сн,он 50 °C н, с осна HCCHE a. Which molecule (or ion) is serving as the nucleophile in this reaction? b. Which molecule (or ion) is serving as the electrophile in this reaction? C. Which molecule (or ion) is serving as the leaving group in this reaction? d. What is the rate law for this reaction? e. Draw the structure of the intermediate that is...
QUESTION 4 [1,2- versus 1,4-Addition Reactions] 4.1 Propose a detailed mechanism for the reaction of 2-butenal with ethynylmagnesium bromide in dry THF followed by quenching with dilute aqueous acid. (5) 4.2 Propose a plausible mechanism for the reaction of 1,3-diphenyl-2-propen-1- one with potassium cyanide in ethanol followed by aqueous work-up. 1 (5) 4.3 Predict and draw the structure of the product of the reaction of 2-methyl-1,3- cyclohexanedione with methyl vinyl ketone (3-buten-2-one) in methanol in the presence of potassium hydroxide....
In the lab, Cassandra the Chemist™ studied the reaction between
2-bromo-3-methyl pentane with a base under the presence of heat.
During her studies, she found that the reaction rate doubled when
she doubled the amount of the base. Draw a full, arrow-pushing,
mechanism of the above reaction showing the most prevalent product
formed.
11. (22 pts) In the lab, Cassandra the Chemist"M pentane with a base under the presence of heat. During her studies, she found that the reaction studied...
Gradescope #2 This question is worth 10 points. The reaction between (R)-2-bromo-3-methylbutane and water in the presence of heat forms Br. H30* and two organic products. Draw a stepwise mechanism for this reaction, clearly showing how each product is formed. Use curved arrows to show electron movement, and include all reactive intermediates, resonance structures, etc. Br H20
2. The reaction below is catalyzed by the CK enzyme: NH O | NHA | СК O= H₂N Ņ coo eo T N con + ATP + ADP Below is a picture of the active site for this enzyme. The red atoms are the amino acids in the CK protein. The blue structure is the substrate, the orange is the phosphate end of ATP. All dashed lines are showing interactions and the curved arrows are showing the mechanism. The wavy...
Gradescope #2 This question is worth 10 points. The reaction between (R)-2-bromo-3-methylbutane and water in the presence of heat forms Br", H3O+ and two organic products. Draw a stepwise mechanism for this reaction, clearly showing how each product is formed. Use curved arrows to show electron movement, and include all reactive intermediates, resonance structures, etc. Br H2O Δ
2. The reaction below is catalyzed by the CK enzyme: NH2 OP H2N H₂N N Ń cooK COO - INN CO + ATP + ADP Below is a picture of the active site for this enzyme. The red atoms are the amino acids in the CK protein. The blue structure is the substrate, the orange is the phosphate end of ATP. All dashed lines are showing interactions and the curved arrows are showing the mechanism. The wavy lines indicate that...
2. If the reaction between iron(III) ion and thiocyanate ion yielded an equilibrium concentration of 0.30 M for each of these ions, what is the equilibrium concentration of the red iron(III)-thiocyanate complex? (Hint: The equilibrium constant for the reaction is in the Background section.) Show your work 3. In the reaction below, NH3(g) + H2O(1) - NH; +H30+ the equilibrium constant is 10-34. Is this reaction likely to take place? Explain your answer. iron(III) and thiocyanate ions, the equilibrium expression...
2. Consider the reactions 1 and 2 shown below. Indicate how the reaction rate for each of the reactions will change your options are: increase, decrease, does NOT change) when the following modifications to the reactions and conditions are introduced: reaction 1 reaction 2 Br CH30 Na CH3OH CH OH as solvent CH3OH is also solvent A. The reaction temperature for both reactions is increased. B. The concentration of the reagent shown above the arrow is increased. C. The concentration...
Pre-Lab Assignment
1) Draw the reaction mechanism for the reaction.
2) Determine the limiting reagent.
Procedure 1 Place approximately 1 g of stilbene dibromide prepared in last week's experiment in a 50 mL round bottom flask. Record the exact mass. Add 0.8 g of KOH and 4 mL of triethylene glycol from the syringe provided in the fume hood (rinse any crystals from the sides of the flask while adding triethylene glycol). 2 Heat the stirred reaction mixture to a...
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