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How to prepare banana oil in the laboratory experimentally.
Typology: Lab Reports
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Banana Oil Lab
Many of the simple esters have pleasant fragrances which we find similar to that of fruits and flowers. These esters have been synthesized in laboratories and are sometimes used to duplicate natural fragrances and flavors in commercially prepared desserts and beverages. Interestingly, they are not used in expensive perfumes because the ester group is not stable to perspiration. It can decompose to produce acids which often have unpleasant odors.
The ester prepared in this experiment has the fragrance of bananas. It has another interesting characteristic. It is identical to the pheromone of the honeybee. A pheromone is a chemical secreted by an organism that results in a specific response from other members of the same species. When a worker bee stings its victim, this pheromone is secreted along with the venom. The pheromone alerts other bees to join in the attack on the intruder.
In this experiment isopentyl acetate will be prepared from the reaction of acetic acid and isopentyl alcohol. The reaction does not yield significant amounts of the ester unless the reaction is forced toward the production of the ester. It can be forced by using an excessive amount of one of the starting materials. We will use an excess of acetic acid as it is less expensive than isopentyl alcohol. A small amount of sulfuric acid will be used as a catalyst. After the reaction is complete, the excess acetic acid and the sulfuric acid can be neutralized with sodium bicarbonate and subsequently separated from the water-insoluble ester.
Banana Oil Lab
Banana Oil Lab
b. 3 mL of isopentyl alcohol
c. 10 drops of sulfuric acid
Banana Oil Lab
a. 1-butanol and acetic acid
b. 2-methyl-2-propanol and formic acid
c. phenol and pentanoic acid
a. cyclopentyl decanoate
b. heptyl heptanoate
a. ethyl benzoate
b. sec-butyl hexanoate
c. isobutyl acetate