along with the aqueous layer when the aqueous layer was getting separated from the organic layer by a pipette. One of the methods that favors the formation of an ester can be made by adding excess acetic acid and another method is conducting Fischer esterification‚ which water will be removed to form the ester. There are several ways to have more isopentyl acetate. First‚
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an alkyl halide. Fischer Esterification is a nucleophilic acyl substitution reaction that converts a carboxylic acid into an ester when the carboxyl group of an acid and the hydroxyl group of an alcohol are condensed with the expulsion of a water molecule. The by product is removed to exploit Le Chatelier’s principle in order to favor the formation of the ester over the starting material. Fig. 1: Esterification of Isopentyl Acetate Fig. 2: Mechanism for the esterification of Isopentyl Acetate
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UNIVERSITI TEKNOLOGI MARA COURSE INFORMATION Confidential Code Course Level Credit Hours Contact Hours : : : : : CHM 556 Organic Chemistry II Degree 4 3 hr (Lecture) 3 hr (Practical) 3 Core CHM 456 Part Course Status Pre-requisite : : : Course Outcomes : Upon completion of this course‚ students should be able to: 1. Determine functional groups present in organic compounds using Infrared Spectroscopy and interpret Nuclear Magnetic Resonance spectra and relate the information to structural
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laboratory manual‚ which was 0.4 g‚ it can be seen that the procedure performed better than the current percent yield may illustrate. The most plausible reason for this expected value may be from the nature of the reaction performed here‚ the Fischer Esterification tends to act as an equilibrium‚ and as such it is prone
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ImageJ integrates the spots based on how dark the spots are. Furthermore‚ the image that was used for ImageJ was blurry‚ which could also have affected ImageJ’s integration of the spots. In future experiments‚ one could run more TLC’s such that a decent TLC can be chosen out of multiple TLC’s‚ allowing for better quantification of data through ImageJ. Furthermore‚ a butanol can be used instead of an ethanol to test how a bulky alcohol will affect the reactivity of the reaction done in this
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Abstract The purpose of this experiment is to synthesize isopentyl acetate via an esterification reaction between glacial acetic acid and isopentyl alcohol‚ using concentrated sulfuric acid as a catalyst. The product was washed using sodium bicarbonate and water‚ then dried with anhydrous sodium sulfate. It was then distilled using a standard simple distillation apparatus. The percent yield of isopentyl acetate was 60.39%. This may have been low due to incomplete distillation or evaporation once
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aMicroscale Synthesis of Isopentyl Acetate (Banana Oil) Objective: Carried out the microscale synthesis of isopentyl acetate by direct esterification of acetic acid and isopentyl alcohol. This was an acid catalyzed Fischer esterification. Both extraction and distillation were employed to obtain a pure product. IR spectroscopy and gas chromatography were used to determine purity of the final product. Reagents: * Compound: | * MW (g/mol): | * MP (°C): | * BP (°C): | * Density (g/mL):
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2013 Abstract The purpose of this lab was to determine whether a sufficiently pure sample of synthetic banana oil could be prepared through Fisher Esterification. During the experiment‚ the reaction mixture was purified through an extraction workup‚ and according to the instructor‚ once getting the density of the product and the actual yield; it was not required to use the distillation method. Introduction
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Experiment # 45: Benzocaine Abstract The local anesthetic‚ benzocaine‚ was synthesized via the esterification of p-aminobenzoic acid with ethanol. The percent yield of crude product was determined to be 21% and the melting point was recorded at 86.2°C ± 0.2°C‚ with a 6.3% error from 92°C‚ the literature melting point of pure benzocaine. The crude product was then recrystallized to improve the purity of benzocaine and 57.4% was recovered. The new melting point range was measured at 89.1°C ±
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Procedure Taylor Levin 5.28.14 Chemistry 352- Organic Chemistry Lab Summer 2014 Purpose: To prepare isopentyl acetate (banana oil)‚ an ester‚ from isopentyl alcohol and acetic acid through the Fischer Esterification reaction. Reactions: acetic acid + isopentyl alcohol isopentyl acetate + water C2H4O2 + C5H120 CH3COOCH2CH2CH(CH3)2 + H20 Procedure: A reflux condenser was assembled using a 25-mL round-bottom flask‚ hot plate‚ and aluminum block
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