dried using anhydrous granular sodium sulfate. After dried‚ the sample was placed in a distillation apparatus and heated. This resulted in 1.8g of pure isopentyl acetate‚ a 44% yield. Introduction Isopentyl acetate is yielded by combining isopentyl alcohol with acetic acid using sulfuric acid as a catalyst. The product is isopentyl acetate also known as banana oil. Banana oil is an ester. Esters can be found in fruits and flowers’ scents. When water is added to an ester‚ the process can be reversed
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frequencies of C=O str.‚ C-H str.‚ and C-H bend in the following molecules: 1. Benzaldehyde 2. Ethyl Benzoate 3. 3-Pentanone 4. Pentanal * For given unknown Infrared spectra‚ figure out the compounds based on the absorption frequencies of C=O str.‚ C-H str.‚ and C-H bend. DATA AND RESULTS: Assignments for unknowns A-D: Spectrum letter: | Compounds | A | 3-Pentanone | B | Ethyl Benzoate | C | Pentanal | D | Benzaldehyde | Comparison of Observed
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and characterization of isoamyl acetate‚ or banana oil‚ was determined. The synthesis was completed by a reversible esterification reaction which required the heating of glacial acetic acid and isoamyl alcohol‚ combined with a sulfuric acid catalyst in hexane. In order to increase the efficiency of the reaction‚ LeChatelier’s Principle is utilized by removing water from the products. As a result‚ the reaction as a whole shifts the left producing more isoamyl acetate to try and balance the reaction
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Jahzeel Morales AP Chemistry December 12‚ 2014 Determination of the Molar Mass of Volatile Liquids Theory: Molar masses‚ can be seen and used daily in chemistry. In this lab‚ the ideal gas law helps determine and evaluate the molar mass of gases and volatile liquids. The ideal gas law compares four properties of a gas which include pressure‚ volume‚ moles‚ and temperature. During this experiment‚ the moles would be unknown‚ in effect the student must use a substance mass divided by its molar mass
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8-Dimethyl-3‚4‚4a‚5‚6-hexahydro-napthalene-2-yl]-prop-2-en-1-ol(2)‚ Heptadecane(3)‚ Benzene‚ [1-butylheptyl]-(4)‚ Benzene‚ [1-methyldecyl]-(5)‚ Oxirane‚ tetradecyl-(6)‚ Hexadecanoic acid‚ methyl ester(7)‚ Hexadecanoic acid‚ ethyl ester(8)‚ 9‚12‚15- Octadecatrienoic acid‚ ethyl ester‚ [Z‚Z‚Z]-(9)‚ Lupeol (11) . The ethanolic extract of the aerial parts showed the most promising activity among selected four solvents against clinically isolated pathogenic bacterial strains. The Ethanol:water extract
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Experiment 13B: Isopentyl Acetate (Banana Oil) Semimicroscale 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
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Vol 455 | 11 September 2008 | doi:10.1038/nature07271 ARTICLES Strigolactone inhibition of shoot branching ` Victoria Gomez-Roldan1‚ Soraya Fermas2‚ Philip B. Brewer3‚ Virginie Puech-Pages1‚ Elizabeth A. Dun3‚ Jean-Paul Pillot2‚ Fabien Letisse4‚ Radoslava Matusova5‚ Saida Danoun1‚ Jean-Charles Portais4‚ ´ Harro Bouwmeester5‚6‚ Guillaume Becard1‚ Christine A. Beveridge3‚7*‚ Catherine Rameau2* & Soizic F. Rochange1* A carotenoid-derived hormonal signal that inhibits shoot branching in plants
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t Design and preparation of buffers effective at different pHs Abstract These experiments aimed to determine the optimum pH ranges various buffers are effective and provide opportunity for the use of the Henderson-Hasselbalch equation to prepare a buffer of a specific pH. Three different buffer systems were initially investigated; volumes of weak acid and weak bases of specified concentration were prepared and titrated against strong acid or strong base solutions with pH readings taken at frequent
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composition will directly affect the viscosity of the molecule. An example of this can be observed between ethyl alcohol and ethyl glycol. Ethyl glycol has two more O-H groups than ethyl alcohol. The extra O-H groups effect the amount of hydrogen bonds in the ethyl glycol molecule. The ethyl glycol has more hydrogen bonds than ethyl alcohol. This gives the ethyl glycol molecule a higher viscosity than the ethyl alcohol molecule. Both kinetic energy and temperature can affect a molecule’s viscosity. When the
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Ester water Particularly‚ 1-hexanol was reacted with an excess of acetic acid‚ using an acid catalyst to yield its ester: hexyl acetate. The reaction was performed under reflux which sped up the reaction by continuous vapor-condensation cycles of the solution mixture as the solution boiled. The vapors were blocked from escaping the solution by a stream of cold water running up the
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