Isopentyl Acetate Banana Oil

Esterification Heating under reflux Extraction Simple distillation Microscale boiling point 

In this experiment you will prepare an ester, isopentyl acetate. This ester is often referred to as banana oil because it has the familiar odor of this fruit. 

Isopentyl acetate is prepared by the direct esterification of acetic acid with isopentyl alcohol. Because the equilibrium does not favor the formation of the ester, it must be shifted to the right, in favor of the product, by using an excess of one of the starting materials. Acetic acid is used in excess because it is less expensive than isopentyl alcohol and more easily removed from the reaction mixture. 

In the isolation procedure, much of the excess acetic acid and the remaining isopentyl alcohol are removed by extraction with sodium bicarbonate and water. After drying with anhydrous sodium sulfate, the ester is purified by distillation. The purity of fhe liquid product is analyzed by performing a microscale boiling point determination or infrared spectroscopy. 

Review Experiment 1 Introduction to Microscale Laboratory Techniques 5 and 6 

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Show how you would accomplish the following syntheses (a) isopentyl alcohol — isopentyl acetate (banana oil)... 

Isopentyl acetate (banana oil) 1-Butanol, 3-methyl-, acetate... 

SYNS ACETIC ACID, ISOPENTYL ESTER BANANA OIL FEMANo. 2055 ISOAMYL ETHANOATE ISOPENTYL ACETATE ISOPENTYL ALCOHOL ACETATE 3-METHYLBUTYL ACETATE 3-METHYL-l-BUTYL ACETATE S-METH iTBUTYL ETR NOATE PEAR OIL... 

Synonyms Acetic acid isopentyl ester Banana oil Isoamyl ethanoate Isopentyl acetate Isopentyl alcohol acetate 3-Methyl-1-butanol acetate 3-Methylbutyl acetate 3-Methyl-1-butyl acetate P-Methylbutyl acetate 3-Methylbutyl ethanoate Pear oil... 

Esters are among the most widespread of all naturally occurring compounds. Many simple esters are pleasant-smelling liquids that are responsible for the fragrant odors of fruits and flowers. For example, methyl butanoate is found in pineapple oil, and isopentyl acetate is a constituent of banana oil. The ester linkage is also present in animal fats and in many biologically important molecules. 

F.14) (F.14) 1-Butanol, 3-methyl-, acetate, isopentyl acetate, 3-methylbutyl acetate, isoamyl acetate, isopentyl alcohol acetate, pear oil, banana oil [123-92-2] FEMA 2055... 

Isopentyl alcohol reacts with pure acetic acid to form isopentyl acetate, the essence of banana oil ... 

Beilstein Handbook Reference) Acetic acid, 3-methylbutyl ester Acetic acid, isopentyl ester AI3-00576 Amyl acetate i-Amyl acetate Amylacetio ester Banana oil BRN 1744750 ... 

SYNONYMS banana oil, isoamyl ethanoate, isopentyl acetate, 3-methyl-1-butanol acetate, 3-methylbutyl ester of acetic acid, 3-methylbutyl ethanoate. 

Synonyms isopentyl acetate 3-methyl-l-butyl acetate isoamyl ethanoate acetic acid isopentyl ester pear oil banana oil... 

For experiments in which a compound is synthesized from other reagents, that is, preparative experiments, it is essential to know the main reaction. To perform sfoichiomefric calculations, you should balance the equation for the main reaction. Therefore, before you begin the experiment, your notebook should contain the balanced equation for the pertinent reaction. Using the preparation of isopentyl acetate, or banana oil, as an example, you should write the following ... 

In Experiment [8B] you will be synthesizing the isopentyl alcohol (3-methylbutanol) ester of acetic add (the basic building block of the fatty adds), isopentyl acetate (isoamyl acetate).This low molecular weigjit ester has a distinct banana- or pear-like odor, and the liquid product is often referred to as banana oil or pear oil (see above). Isopentyl acetate has a wide variety of uses as a flavoring agent in mineral waters and syrups a solvent for oil paints, tarinins, nitrocellulose, lacquers, and a number of other commercial products a perfume ingredient in shoe polish and in the manufacture of artifidal silk, leather, and pearls.You are very Kkely to find this experiment to be a pleasant olfactory experience ... 

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