Synthesis, Purification and Identification of an Ester Synthesis, Purification and Identification of an Ester 8 August Alcohol An ester was synthesized from the conversion of acetic acid and isopentyl alcohol. A mixture of isopentyl alcohol and sulfuric acid was separated and distilled to purify the ester.
These esters can be synthesized by combining a carboxylic acid with an alcohol while using a mineral catalyst.
By causing a reaction between ethanoic acid, more commonly known as acetic acid, and 3-methylbutanol or isopentyl alcohol, the ester isopentyl acetate 3-methylbutyl ethanoate is produced. This ester is used to give perfumes, foods, and beverages their fragrance and is a major component of banana oil.
In order to synthesize isopentyl acetate, glacial acetic acid undergoes esterification with isopentyl alcohol. Before the process of esterification can begin, the starting material acetic acid must be obtained.
Acetic acid can either be found naturally or produced synthetically. In nature, this acid is found as a product of the oxidation of ethanol. Acetic acid is the major organic component of vinegar. If the sugars in apple cider or grape juice are allowed to ferment ethanol is formed initially, but prolonged fermentation leads to acetic acid.
Acetic acid dissolves most simple organic compounds, and it has a convenient boiling point C.
In this experiment acetic acid is both the solvent and reactant. Using an excess of acetic acid also helps to drive the equilibrium toward the desired product Mohrig, Hammond, Morrill, and Neckers. Once the method for producing acetic acid is known, we can add isopentyl alcohol in attempt to produce isopentyl acetate.
With this limited amount of information one has to come up with the reagents needed to form isopentyl acetate using the esterification process. Using basic knowledge about how esters are formed from combining a carboxylic acid and an alcohol, one can determine that isopentyl alcohol and glacial acetic acid are the reagents that would form isopentyl acetate via esterification.
Began by combing 16 ml of isopentyl alcohol and 22 ml of glacial acetic acid; These specific amounts were used because a limit between 5gg had been set on the amount of limiting reagent being used. In order for this reaction to take place, a catalyst was required so sulfuric acid was used.
The process of esterification was started by assembling a reflux apparatus and beginning to heat this mixture at 60oC for an hour. While this mixture was heating, it changed from a foggy appearance dark yellow color almost immediately.
Also, after about 8 minutes of boiling, an obvious odor of banana could be smelt. Upon removing this mixture after the hour of boiling was over, the sweet, fruity, banana smell was very strong and distinct and the solution was very dark yellow.
After successful completion of forming this product, this mixture was put into a separatory funnel washed with 50 ml of distilled water and the lower aqueous layer was drained out, separating it from the upper organic layer. This just described was necessary in order to remove the excess acid from the product.Preparing Isopentyl Acetate by the Fischer Esterification Preparing Isopentyl Acetate by the Fischer Esterification Leah Monroe May 8, Organic Chemistry Lab II.
Search: moles isopentyl acetate g of isopentyl acetate calculate molecular weight of isopentyl acetateSYNT m o d u l a r. · CH Lab 4 Synthesis of Artificial Flavorings by Fischer Esterification PURPOSE: isoamyl acetate 3 oil of spruce 2 call Fischer Esterification.
CH Synthesis of Esters (3/11) 2 The structures and approximate smell of a few esters follow:barnweddingvt.com Lab/CHB Lab/4 CH Fischer Esterification analysis lab report.
The lab report contains how isopentanol and glacial acetic acid was converted into isopentyl acetate. It also contains my results and how I managed to explain the problem I've encountered throughout the lab.
calculate moles of materials used in fischer esterification synthesis and determine limiting reactant. (6ml w/ g/ml acetic acid) (ml w/ g/ml isoamyl alcohol) Moles of acetic acid: Free Essay: Abstract: The purpose of this experiment was to synthesize isopentyl acetate via an esterification reaction between acetic acid and isopentyl barnweddingvt.com The crude ester produced in lab was isopentyl acetate, because first, the product smelled of bananas and second, the IR spectrum for the product shows that the product is isopentyl acetate.