Preparation of N‚N-Diethyl-m-toluamide (DEET) and its Identification by IR and NMR Spectroscopy Eim A. Chemist CHEM 304 July 10‚ 2005 INTRODUCTION N‚N-Diethyl-m-toluamide (DEET) is the active ingredient in many insect repellants.1 In this experiment‚ DEET will be prepared from m-toluic acid through the intermediate acid chloride and then identified by its IR and proton NMR spectra. The overall reaction is a series of two acyl substitutions and is shown in Scheme 1 below: [pic] Scheme
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solution distributed to an area of greater vascularity leads to greater rate and degree of absorption. The final plasma concentration of a local anaesthetic is determined by the rate of tissue distribution and the rate of clearance of the drug69. Amide local anaesthetics are widely distributed in the tissues following systemic absorption. Metabolism and clearance: Metabolism occurs
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source of minerals and vitamins and is rich in total water soluble sugars‚ free reducing sugars‚ amide proteins among other nutrients. It has been reported that on an average‚ the oblong-fruited eggplant cultivars are rich in total soluble sugars‚ whereas the long-fruited cultivars contain a higher content of free reducing sugars‚ anthocyanin‚ phenols‚ glycoalkaloids (such as solasodine)‚ dry matter‚ and amide proteins (Bajaj et al. 1979). For processing purposes‚ the fruit should have high dry matter
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Experiment 1: TLC Analysis of Analgesic Drugs 1/23/2011 Purpose: The goal of this experiment is to test our knowledge and understanding of TLC analysis by having us do a TLC analysis of analgesics to figure out their main chemical components. Calculations: 1.) Rf = Distance spot traveled/ distance solvent traveled Results: Table 1: TLC Analysis Analgesic Drugs | Rf Value | Acetaminophen | 0.323 | Aspirin | 0.597 | Caffeine | 0.081 | Unknown 154 (Plate 1) | 0.081‚ 0.306‚ 0.597
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REPORT EXPERIMENT 9 CARBOXYLIC ACID AND DERIVATIVES Date: January 19‚ 2004 Objectives: 1. To understand the reactions of carboxylic compounds and derivatives. 2. To know the methods for preparing carboxylic acid derivatives. 3. To know the methods for testing the carboxylic acid derivatives. Experimental Procedures: 9.1 Solubility 1. Prepare 3 test tubes with 3 ml of water in each. 2. Place 3 drops of acetic acid‚ benzoic acid‚ and oxalic acid in separate test tubes. 3. Shake and observe
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Topic Acid-Base Theory (Unit 1) Acid-Base Theory (Unit 2) Isomerism (Unit 1) Isomerism (Unit 2) Nomenclature Reaction Mechanism (Unit 1) - Introduction to Mechanism Reaction Mechanism (Unit 2) - Nucleophilic substitution Reaction Mechanism (Unit 3) - Nucleophilic substitution Reaction Mechanism (Unit 4) - Nucleophilic substitution Reaction Mechanism (Unit 5) - Nucleophilic substitution Reaction Mechanism (Unit 6) - Nucleophilic substitution Reaction Mechanism (Unit 7) - Elimination Reaction Mechanism
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-APPLICATION OF ENZYMES IN ORGANIC CHEMISTRY Why enzymes in organic synthesis? | Alternative to chemical methods: * High region- and stereoselectivity * Milder reaction conditions * Environmentally more friendly | Which enzyme(s)? | OxidoreductasesHydrolasesLyasesIsomerases | Which reaction system? | AqueousAqueous and water-miscible organic solventAqueous and water-immiscible organic solventPure organic solventOther solvents (supercritical fluids‚ ionic liquids) | Which ‘chemistry’
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Analyst Cite this: Analyst‚ 2011‚ 136‚ 2359 www.rsc.org/analyst View Article Online / Journal Homepage / Table of Contents for this issue Dynamic Article Links < C PAPER Characterization of porcine skin as a model for human skin studies using infrared spectroscopic imaging Rong Kong and Rohit Bhargava* Downloaded by Queen Mary‚ University of London on 19/04/2013 18:44:34. Published on 21 April 2011 on http://pubs.rsc.org | doi:10.1039/C1AN15111H Received 10th February 2011‚ Accepted
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amino acids with non-polar side chains. Rank the following according to increasing non-polarity i.e. 1 = least non-polar‚ 4 = most non-polar. leu; phe; val; ala Polar Side Chains: Side chains which have various functional groups such as acids‚ amides‚ alcohols‚ and amines will impart a more polar character to the amino acid. The ranking of polarity will depend on the relative ranking of polarity for various functional groups as determined in functional groups. In addition‚ the number of
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Contents Series Preface Preface Acronyms‚ Abbreviations and Symbols About the Author 1 Introduction Electromagnetic Radiation Infrared Absorptions Normal Modes of Vibration Complicating Factors 1.4.1 Overtone and Combination Bands 1.4.2 Fermi Resonance 1.4.3 Coupling 1.4.4 Vibration–Rotation Bands References 2 Experimental Methods 2.1 Introduction 2.2 Dispersive Infrared Spectrometers 2.3 Fourier-Transform Infrared Spectrometers 2.3.1 Michelson Interferometers 2.3.2 Sources and Detectors 2.3.3
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