Homework Answers
2)
The esterification goes on by acting OH of alcohol attacking on acid or acid derrivative. So, Acid or acid derrivative has to be good electrophile... Now, acid chloride has very high electrophilicity, then anhydride also has higher than non-derrivated acid . So, best choice is to use acid hloride, then anhydride can also be used...
The beauty of anhidride is , it will generate a ester and a acid by ersterification . So , the produced acid can furthur undergo sterification . So , anhidride use is very economical and good for this purpose.
3)
Too much base is needed, because, initial acid catalyst has to be removed from ester.
In addition , working with acid or acid derrivatives , due to large reversibility of the reaction , a large number of unreacted carboxyluc acid can still be present ,that needs to be removed. So , high volume NaOH needed.
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2. If one were esterifying an expensive alcohol with an expensive carboxylic acid derivative, would it...
We made esters from carboxylic acids and alcohol. (for one of them, acetic acid + isopentyl...
We made esters from carboxylic acids and alcohol. (for one of them, acetic acid + isopentyl alcohol + couple drops of sulfuric acid). Could someone please explain those. Thank you 1. Consider if we had prepared high molecular weight esters, what problems would this pose regarding our method of analysis 2. We used sulfuric acid as a catalyst, but carboxylic acids are a reagent in this reaction. Would simply using excess carboxylic acid work as efficiently as sulfuric acid to...
An acid anhydride reacts with an alcohol to form one ester and one carboxylic acid. An...
An acid anhydride reacts with an alcohol to form one
ester and one carboxylic acid. An unsymmetrical acid anhydride can
react with alcohol at either carbonyl carbon, so there are two
possible esters and two possible carboxylic acids.
Draw the structures of all possible organic products formed in the following reaction. Do not draw counterions or byproducts. CH3 OH CH3 НАС CH3 CH3 HO So
True or false: a) The electron-withdrawing substituents do not impact the acidity of carboxylic acids. b)...
True or false: a) The electron-withdrawing substituents do not impact the acidity of carboxylic acids. b) Hydrolysis of nitriles is a method to synthesize carboxylic acid. c) The order of reactivity of carboxylic acid derivatives is as follow: Acyl chloride > Acid anhydride > Ester > Amide. d) SOCl2, PCl3 and PCl5 are three types of special reagents to convert carboxylic acid to acyl chloride. e) Acyl chlorides are the most reactive common acyl derivatives, and can be used to...
2. is the reaction of a carboxylic acid derivative with an alcohol to yield an ester....
2. is the reaction of a carboxylic acid derivative with an alcohol to yield an ester. a. Hydrolysis b. Alcoholysis C. Aminolysis d. Reduction e. Grignard's reaction
Questions 12-20 are true and false! (12) Hydrolysis of nitriles is a method to synthesize carboxylic...
Questions 12-20 are true and false!
(12) Hydrolysis of nitriles is a method to synthesize carboxylic acid. (13) The order of reactivity of carboxylic acid derivatives is as follow: Acyl chloride > Acid anhydride > Ester > Amide. (14) SOCI2, PC13 and PCls are three types of special reagents to convert carboxylic acid to acyl chloride (15) Acyl chlorides are the most reactive common acyl derivatives, and can be used to synthesize anhydride, ester, and amide. (16) Acyl chloride is...
1-6 Part B: Syntheses of Fragrant Esters Fragrant Esters Synthesis Test Tube Alcohol Carboxylic Acid Ester...
1-6
Part B: Syntheses of Fragrant Esters Fragrant Esters Synthesis Test Tube Alcohol Carboxylic Acid Ester Structure Observed Fragrance Сн,снусн, он 1propanol CH.COM Actie Acid CH, CHCH.CH OH Ioan Alcohol CHC-QH Acetic Acid 9 CH,CH.CH OH 1-octanol CH,C-OH Acetic Acid 8 | CH g CH2 CH₂ COCHE 0 CH, OH Methanol CH,CH,CH, OH Butyric Acils H₂O 5 CH,CH, OH Ethanol CH,CH.CH,C -OH Butyric Acid CH3OH CH,OH Iho ан C-C-OH Methanol H OH Salicylic Acid OH H2O Exercises for the General...
nate 27 EXPERIMENT 27 Pre-Lab Questions Write structures for the following carboxylic acids and alcohols that...
nate 27 EXPERIMENT 27 Pre-Lab Questions Write structures for the following carboxylic acids and alcohols that will be used in this laboratory: e. benzyl alcohol a. acetic acid b. formic acid f. isopentyl alcohol (3-methylbutanol) 8. ethyl alcohol (ethanol) c. salicylic acid h. methyl alcohol (methanol d. isobutyl alcohol (2-methylpropanol delete 336 G O Bettelheim Landesberg While the structure of the salt, sodium aetate. Write the structure of the starting carboxylic acid used to make this acetate salt 3. Ethyl...
what is the purpose of the acid catalyst: sulfuric acid? why cant acetic acid, which is...
what is the purpose of the acid catalyst: sulfuric acid? why
cant acetic acid, which is already being used, serve in the same
capacity? show mechanism of the reaction
H+ R-C-OH + carboxylic acid (excess) R2-OH alcohol + HO Ric-o-R₂ an ester The general reaction scheme for a Fischer esterification is shown above. Using the combination of acetic acid and either isopentanol AND n-propanol you will synthesize two fruity-smelling esters. The hydronium source that will catalyze this reaction is sulfuric...
Can someone please help me interpret the IR spectra of the reaction between isoamyl alcohol via...
Can
someone please help me interpret the IR spectra of the reaction
between isoamyl alcohol via Fischer esterification.
esta product 125 120 115 110 105 100 95 90 85 55 50 45 40 35 30 20 15 500 1000 2500 2000 1500 3000 3500 4000 Wavenumbers (cm-1) %Transmittance 8 R2 % 8 2958.38 2872.32 1739.58 1654.60 1648.01 1560.10 1541.78 1466.31 1508.05 1387.76 1366.35 1227 89 1171.12 1055.35 60196 818.27 2 General Reaction: R'-OH он H,0 H, heat OR Reaction Mechanism:...
This is a Fischer Esterification using the alcohol, methanol, and the carboxylic acid, butyric acid, to...
This is a Fischer Esterification using the alcohol, methanol,
and the carboxylic acid, butyric acid, to create the ester, methyl
butanoate (smells like apple). After refluxing methanol, butyric
acid, and concentrated sulfuric acid, a separatory flask was used
and the ester was extracted using ice water, then diethyl ether,
then 2 portions of sodium carbonate, and a saturated sodium
chloride brine solution. Anyhydrous sodium sulfate was used after
separation to dry the ester. Please help!!
4. Read about infrared spectroscopy...
An acid anhydride reacts with an alcohol to form one
ester and one carboxylic acid. An unsymmetrical acid anhydride can
react with alcohol at either carbonyl carbon, so there are two
possible esters and two possible carboxylic acids.
Draw the structures of all possible organic products formed in the following reaction. Do not draw counterions or byproducts. CH3 OH CH3 НАС CH3 CH3 HO So
2. is the reaction of a carboxylic acid derivative with an alcohol to yield an ester. a. Hydrolysis b. Alcoholysis C. Aminolysis d. Reduction e. Grignard's reaction
Questions 12-20 are true and false!
(12) Hydrolysis of nitriles is a method to synthesize carboxylic acid. (13) The order of reactivity of carboxylic acid derivatives is as follow: Acyl chloride > Acid anhydride > Ester > Amide. (14) SOCI2, PC13 and PCls are three types of special reagents to convert carboxylic acid to acyl chloride (15) Acyl chlorides are the most reactive common acyl derivatives, and can be used to synthesize anhydride, ester, and amide. (16) Acyl chloride is...
1-6
Part B: Syntheses of Fragrant Esters Fragrant Esters Synthesis Test Tube Alcohol Carboxylic Acid Ester Structure Observed Fragrance Сн,снусн, он 1propanol CH.COM Actie Acid CH, CHCH.CH OH Ioan Alcohol CHC-QH Acetic Acid 9 CH,CH.CH OH 1-octanol CH,C-OH Acetic Acid 8 | CH g CH2 CH₂ COCHE 0 CH, OH Methanol CH,CH,CH, OH Butyric Acils H₂O 5 CH,CH, OH Ethanol CH,CH.CH,C -OH Butyric Acid CH3OH CH,OH Iho ан C-C-OH Methanol H OH Salicylic Acid OH H2O Exercises for the General...
nate 27 EXPERIMENT 27 Pre-Lab Questions Write structures for the following carboxylic acids and alcohols that will be used in this laboratory: e. benzyl alcohol a. acetic acid b. formic acid f. isopentyl alcohol (3-methylbutanol) 8. ethyl alcohol (ethanol) c. salicylic acid h. methyl alcohol (methanol d. isobutyl alcohol (2-methylpropanol delete 336 G O Bettelheim Landesberg While the structure of the salt, sodium aetate. Write the structure of the starting carboxylic acid used to make this acetate salt 3. Ethyl...
what is the purpose of the acid catalyst: sulfuric acid? why
cant acetic acid, which is already being used, serve in the same
capacity? show mechanism of the reaction
H+ R-C-OH + carboxylic acid (excess) R2-OH alcohol + HO Ric-o-R₂ an ester The general reaction scheme for a Fischer esterification is shown above. Using the combination of acetic acid and either isopentanol AND n-propanol you will synthesize two fruity-smelling esters. The hydronium source that will catalyze this reaction is sulfuric...
Can
someone please help me interpret the IR spectra of the reaction
between isoamyl alcohol via Fischer esterification.
esta product 125 120 115 110 105 100 95 90 85 55 50 45 40 35 30 20 15 500 1000 2500 2000 1500 3000 3500 4000 Wavenumbers (cm-1) %Transmittance 8 R2 % 8 2958.38 2872.32 1739.58 1654.60 1648.01 1560.10 1541.78 1466.31 1508.05 1387.76 1366.35 1227 89 1171.12 1055.35 60196 818.27 2 General Reaction: R'-OH он H,0 H, heat OR Reaction Mechanism:...
This is a Fischer Esterification using the alcohol, methanol,
and the carboxylic acid, butyric acid, to create the ester, methyl
butanoate (smells like apple). After refluxing methanol, butyric
acid, and concentrated sulfuric acid, a separatory flask was used
and the ester was extracted using ice water, then diethyl ether,
then 2 portions of sodium carbonate, and a saturated sodium
chloride brine solution. Anyhydrous sodium sulfate was used after
separation to dry the ester. Please help!!
4. Read about infrared spectroscopy...
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