NOV 09 How product giving is a ‘slam dunk’ for retailers By ELLEN DAVIS‚ VP AND NRF SPOKESPERSON | Published: NOVEMBER 9‚ 2011 Be the first to comment | This entry was posted in Holidays‚ Loss Prevention‚ Retail Companies‚ Sustainability Donating unwanted products to organizations that help people in times of need is undoubtedly a win-win for retailers. But as many companies have found‚ getting the right products to the right people isn’t always easy. Recipients have to be vetted‚ distribution
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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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intramolecular esterification (i.e.‚ a lactonization) is possible. This
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Glen Huang Period 9 Synthesis of Isopentyl Acetate Purpose: To prepare isopentyl acetate from isopentyl alcohol and acetic acid by the Fischer esterification reaction. Materials: West condenser‚ 250 mL round bottomed flask‚ two 250 mL flasks‚ heating mantle‚ boiling chips‚ graduated cylinder‚ sodium bicarbonate‚ isopentyl alcohol‚ glacial acetic acid‚ concentrated sulfuric acid‚ separatory funnel Procedure: 1. Place 50 mL of isopentyl alcohol in a 250 mL round bottom flask and add 60 mL
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Exp’t 84 Synthesis of Methyl Benzoate by Fisher Esterification from K. L. Williamson‚ Macroscale and Microscale Organic Experiments‚ 2nd Ed. 1994‚ Houghton Mifflin‚ Boston p385 Revised 10/15/03 Prelab Exercise: Give the detailed mechanism for the acid-catalyzed hydrolysis of methyl benzoate. Introduction: The ester group is an important functional group that can be synthesized in a number of different ways. The low-molecular-weight esters have very pleasant odors and indeed are the major components
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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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reactions: a. Grignard reaction including identification of the nucleophile. b. Conversion of nitriles into carboxylic acids and acid derivatives c. Diels-Alder reactions d. Reduction of aldehydes and reagents used for that reaction. e. Fischer esterification including identification of nucleophile‚ catalyst‚ and leaving group. f. Reaction of acid chlorides to produce alcohols. g. Reaction of carbonyl compounds with amines to produce amides including identification of nucleophile‚ catalyst‚ and
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(isopentyl acetate.) Ester are often prepared by the Fischer esterification method‚ which involves heating a carboxylic acid with an alcohol in the presence of an acid catalyst. Theory: Synthesize isopentyl acetate by combining isopentyl alcohol with acetic acid and sulfuric acid and then heating the reaction mixture under reflux for an hour. The alcohol is the limiting reactant‚ so it should be weighed/ the acids can be measured by volume. The esterification reaction is reversible‚ and it has an equilibrium
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Fischer Esterification – nucleophilic substitution reaction Strong acid catalyst (concentrated sulfuric acid Purpose of a reflux is to heat a reaction mixture at its boiling temperature to form products‚ without losing any of the compounds in the reaction flask TO HAVE GREAT PERCENT YIELD: As reaction is reversible‚ removal of water or the addition of an excess of one of the reactants (cheaper one) drives the reaction towards formation of ester. (Excess carboxylic acid is used) Adding excess
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and 2853.8 cm-1 (Sp3 C-H); H1NMR (d6-DMSO) 11.487ppm (2‚ 0)‚ 6.097ppm (M‚ 2H)‚ 3.160 ppm (D‚ 2H)‚ 2.995 ppm (S‚ 2H)‚ 1.280 ppm (S‚ 2H); 13C NMR (d6-DMSO) 173.979 ppm‚ 135.199 ppm‚ 48.714 ppm‚ 48.269 ppm‚ 46.384 ppm. After hydrolysis the Fisher Esterification reaction is ran on the diacid. In a 25 mL round bottom flask the endo-diacid is mixed with methanol and concentrated sulfuric acid. A boiling chip is added to the flask and a reflux condenser is attached. The mixture
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