Homework Answers
Statement C is true.
Production of esters from carboxylic acid and alcohol. Heat them in the presence of acid catalyst such as sulfuric acid (H2SO4) is used as a catalyst.
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uestion 35 3 points What is the role of H2SO4 in the following reaction? H2SO4 OH...
Why does the following reaction use 2 equivalents of amine? 2@g CHANH. Products??? The first equivalent...
Why does the following reaction use 2 equivalents of amine? 2@g CHANH. Products??? The first equivalent undergoes nucleophilie attack with the carbonyl carbon, the second equivalent neutralizes the acid byproduct The first equivalent undergoes electrophilie attack with the carbonyl carbon, the second equivalent undergoes nucleophilic attack with the carbonyl oxygen The first equivalent undergoes nucleophili tak with the carbonyl carbon, the second equivalent undergoes nucleophilic attack with the carbonyl oxygen The first equivalent undergoes nucleophilic attack with the carbonyl carbon,...
OH H+ CH3 H3C OH Esters can be synthesized by an acid-catalyzed nucleophilic acyl substitution between...
OH H+ CH3 H3C OH Esters can be synthesized by an acid-catalyzed nucleophilic acyl substitution between an alcohol and a carboxylic acid; this process is called the Fischer esterification reaction. Because the alcohol oxygen is a poor nucleophile, the carbonyl carbon is made a better electrophile by protonation of the carbonyl oxygen. The steps of the synthesis are all reversible. The reaction is generally driven to completion by using an excess of the liquid alcohol as a solvent, or by...
What is the correct name for the following compound? d) 5-oxo-3-octenoic acid What is the defining...
What is the correct name for the following compound? d) 5-oxo-3-octenoic acid What is the defining functional group of a carboxylic acid? a) an-H attached to a carbonyl group b) an-H attached to a carbon-carbon triple bond c) an-OH attached to a carbonyl group d) an -OH group attached to a O-C double bond e) an-OH group attached to an aromatic ring To convert a carboxylic acid to an aldehyde a) convert the acid to an acid chloride, then use...
Question 1 (1 point) Which of the following best describes glycogen? Question 3 (1 point) All...
Question 1 (1 point) Which of the following best describes glycogen? Question 3 (1 point) All the protease mechanisms we discussed in class involved formation of a covalent acyl enzyme intermediate. O Alinear polymer of glucose joined by a(1,6) linkages. True False O A polymer of glucose joined by a(1,4) linkages with a(1,6) linkages every 5-10 residues. Question 4 (1 point) O A polymer of glucose joined by B(1,4) linkages with a(1,6) linkages every 5-10 residues. In the mechanism of...
Question 1 (1 point) Which of the following best describes glycogen? Question 3 (1 point) All...
Question 1 (1 point) Which of the following best describes glycogen? Question 3 (1 point) All the protease mechanisms we discussed in class involved formation of a covalent acyl enzyme intermediate. O Alinear polymer of glucose joined by a(1,6) linkages. True False O A polymer of glucose joined by a(1,4) linkages with a(1,6) linkages every 5-10 residues. Question 4 (1 point) O A polymer of glucose joined by B(1,4) linkages with a(1,6) linkages every 5-10 residues. In the mechanism of...
What happens in the first step of this reaction? 0 o OCH; H + CH3OH OH...
What happens in the first step of this reaction? 0 o OCH; H + CH3OH OH The hydroxyl group of the alcohol becomes protonated The carbonyl oxygen becomes protonated The methoxy group of the ester becomes protonated The carbonyl carbon becomes protonated OH Ne Cryo H SOHO 1) PB, B2 2) H20 O OH Br H or Br OH Br Why is the following reaction not reversible? O Nao O Naci CI The reactants are more stable than the products...
CHEM 242 Score (100): TEST #3 July 24, 2014 (Thursday) NAME PART A. (3pt each) Please...
CHEM 242 Score (100): TEST #3 July 24, 2014 (Thursday) NAME PART A. (3pt each) Please circle the right answer. Where would be the absorption peak of a carbonyl, C-O, stretching in IR? a) at 3300 cm b) at 2980 cm cat 1700 crm d) at 1200 cm 2. Which one is the most reactive with a Grignard reagent in nucleophilic addition rxn? a) Acetone b) benzaldehyde c)Butanone d) acetophenone 3. What is the purpose of protonating a carbonyl? a)...
can you solve everything Instructions: Consider the reaction below to answer the following question. На но...
can you solve everything
Instructions: Consider the reaction below to answer the following question. На но носH,сH,он в 4. Refer to instructions. The electrophile, the nucleophile and the catalyst in this reaction are indicated by letters respectively and Multiple Choice Identify the choice that best completes the statement or answers the question S. Many nucleophilic addition reactions of aldehydes and ketones are catalyzed by acid or base. Bases catalyze hydration by: a. converting the water to hydroxide ion, a much...
3. We have described how acyl chloride compounds (RC=OCI) can, with the assistance of a Lewis...
3. We have described how acyl chloride compounds (RC=OCI) can, with the assistance of a Lewis acid catalyst, act as electrophiles in electrophilic aromatic substitution reactions. Like Lewis acids, protonic acids also can enhance the electrophilicity of carbonyl carbons. One equivalent of acetone will react with two equivalents of phenol to form the now notorious compound bisphenol A. The net reaction is indicated here. CHO OH H2SO4 OH HO НАС CH CH, bisphenol A phenol acetone (Note that 2 equivalents...
Write a small summary ( introduction) of what this experiment is going to be about
Write a small summary ( introduction) of what this experiment
is going to be about
Experiment 6 Testsfor Aldehydes and Ketones Both aldehydes and ketones have carbonyl group and thus have similar reactions due to this functiona group. The C-o double bond consists of a -bond and a bond. The electrons situated above an below the carbonyl plane are exposure, making the carbonyl bond reactive. Oxygen is more electronegative than carbon and the C-O bond is polar, more negative on...
Why does the following reaction use 2 equivalents of amine? 2@g CHANH. Products??? The first equivalent undergoes nucleophilie attack with the carbonyl carbon, the second equivalent neutralizes the acid byproduct The first equivalent undergoes electrophilie attack with the carbonyl carbon, the second equivalent undergoes nucleophilic attack with the carbonyl oxygen The first equivalent undergoes nucleophili tak with the carbonyl carbon, the second equivalent undergoes nucleophilic attack with the carbonyl oxygen The first equivalent undergoes nucleophilic attack with the carbonyl carbon,...
OH H+ CH3 H3C OH Esters can be synthesized by an acid-catalyzed nucleophilic acyl substitution between an alcohol and a carboxylic acid; this process is called the Fischer esterification reaction. Because the alcohol oxygen is a poor nucleophile, the carbonyl carbon is made a better electrophile by protonation of the carbonyl oxygen. The steps of the synthesis are all reversible. The reaction is generally driven to completion by using an excess of the liquid alcohol as a solvent, or by...
What is the correct name for the following compound? d) 5-oxo-3-octenoic acid What is the defining functional group of a carboxylic acid? a) an-H attached to a carbonyl group b) an-H attached to a carbon-carbon triple bond c) an-OH attached to a carbonyl group d) an -OH group attached to a O-C double bond e) an-OH group attached to an aromatic ring To convert a carboxylic acid to an aldehyde a) convert the acid to an acid chloride, then use...
Question 1 (1 point) Which of the following best describes glycogen? Question 3 (1 point) All the protease mechanisms we discussed in class involved formation of a covalent acyl enzyme intermediate. O Alinear polymer of glucose joined by a(1,6) linkages. True False O A polymer of glucose joined by a(1,4) linkages with a(1,6) linkages every 5-10 residues. Question 4 (1 point) O A polymer of glucose joined by B(1,4) linkages with a(1,6) linkages every 5-10 residues. In the mechanism of...
Question 1 (1 point) Which of the following best describes glycogen? Question 3 (1 point) All the protease mechanisms we discussed in class involved formation of a covalent acyl enzyme intermediate. O Alinear polymer of glucose joined by a(1,6) linkages. True False O A polymer of glucose joined by a(1,4) linkages with a(1,6) linkages every 5-10 residues. Question 4 (1 point) O A polymer of glucose joined by B(1,4) linkages with a(1,6) linkages every 5-10 residues. In the mechanism of...
What happens in the first step of this reaction? 0 o OCH; H + CH3OH OH The hydroxyl group of the alcohol becomes protonated The carbonyl oxygen becomes protonated The methoxy group of the ester becomes protonated The carbonyl carbon becomes protonated OH Ne Cryo H SOHO 1) PB, B2 2) H20 O OH Br H or Br OH Br Why is the following reaction not reversible? O Nao O Naci CI The reactants are more stable than the products...
CHEM 242 Score (100): TEST #3 July 24, 2014 (Thursday) NAME PART A. (3pt each) Please circle the right answer. Where would be the absorption peak of a carbonyl, C-O, stretching in IR? a) at 3300 cm b) at 2980 cm cat 1700 crm d) at 1200 cm 2. Which one is the most reactive with a Grignard reagent in nucleophilic addition rxn? a) Acetone b) benzaldehyde c)Butanone d) acetophenone 3. What is the purpose of protonating a carbonyl? a)...
can you solve everything
Instructions: Consider the reaction below to answer the following question. На но носH,сH,он в 4. Refer to instructions. The electrophile, the nucleophile and the catalyst in this reaction are indicated by letters respectively and Multiple Choice Identify the choice that best completes the statement or answers the question S. Many nucleophilic addition reactions of aldehydes and ketones are catalyzed by acid or base. Bases catalyze hydration by: a. converting the water to hydroxide ion, a much...
3. We have described how acyl chloride compounds (RC=OCI) can, with the assistance of a Lewis acid catalyst, act as electrophiles in electrophilic aromatic substitution reactions. Like Lewis acids, protonic acids also can enhance the electrophilicity of carbonyl carbons. One equivalent of acetone will react with two equivalents of phenol to form the now notorious compound bisphenol A. The net reaction is indicated here. CHO OH H2SO4 OH HO НАС CH CH, bisphenol A phenol acetone (Note that 2 equivalents...
Write a small summary ( introduction) of what this experiment
is going to be about
Experiment 6 Testsfor Aldehydes and Ketones Both aldehydes and ketones have carbonyl group and thus have similar reactions due to this functiona group. The C-o double bond consists of a -bond and a bond. The electrons situated above an below the carbonyl plane are exposure, making the carbonyl bond reactive. Oxygen is more electronegative than carbon and the C-O bond is polar, more negative on...
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