Exercise 1: Synthesis of Fragrant Esters Data Table 1. Fragrant Esters. Tube # A
ID: 894145 • Letter: E
Question
Exercise 1: Synthesis of Fragrant Esters
Data Table 1. Fragrant Esters.
Tube #
Alcohol
Acid
Common Name
IUPAC Name
Fragrance
1
Methanol
acetic
Methyl acetate
2
Ethanol
acetic
3
Isoamyl*
acetic
4
Methanol
butyric
5
Ethanol
butyric
6
Isoamyl*
butyric
7
Methanol
salicylic
Questions
1. What role does sulfuric acid play in the production of the esters in lab?
2. Name two commercial products that contain oil of wintergreen.
3. Explain why the esters made in this lab could not be used as flavoring agents.
4, What would be the name of the ester produced from isoamyl alcohol and isovaleric acid?
Tube #
Alcohol
Acid
Common Name
IUPAC Name
Fragrance
1
Methanol
acetic
Methyl acetate
2
Ethanol
acetic
3
Isoamyl*
acetic
4
Methanol
butyric
5
Ethanol
butyric
6
Isoamyl*
butyric
7
Methanol
salicylic
Explanation / Answer
1- Esterification is condensation reaction between carboxylic acid and alcohol.Concentrated sulfuric acid (H2SO4) has been used as a catalyst to speed the reactionand a dehydrating agent.It work as a strong proton donor to make the carboxylic acid act as if it were, of itself, a good proton source. The reaction is as follows-
H2SO4+R-COOHHSO4-+R-C+(OH)2
2-The active ingredient in oil of wintergreen is methyl salicylate. Oil of wintergreen has medicinal used. It is often used in topical salves, ointments, and creams for muscle aches and pains.example- Volini- (ranbaxy), Iodex etc.
4-Isoamylalcohol - 3methyl 1Butanol
isovaleric acid - 3methyl Butanoic Acid
The name of the ester produced is 3-methyl butyl 3-methyl butanoate .
moleculer formula-CH3,CH(CH3).CH2.COO.CH2.CH2.CH(CH3).CH...
3- The esters made in this lab could not be used as flavoring agents, because it's contain sulfuric acid which is used as catalyst.
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