Preparation of Dibenzalacetone by the Aldol condensation David o Neill Date of experiment: 14/12/2011 Apparatus Steam bath‚ ice bath‚ Buchner funnel‚ beaker‚ conical flask‚ filter paper‚ TLC apparatus‚ Melting point apparatus Materials / chemicals Benzaldehyde‚ acetone‚ ethanolic sodium hydroxide‚ ethanol Introduction The synthesis of dibenzalacetone is formed from an Aldol condensation reaction. An Aldol condensation reaction is a very effective way of forming a carbon – carbon bond reaction‚ in
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Biological chemistry 1B Experiment 1: Thin layer chromatography [TLC] Aim The aim of this experiment is to apply the technique of TLC to first separate out a mixture of coloured dyes and then to do the same for selected range of amino acids. Procedure 2 MMs of each different colour were collected into separate beakers. Approximately 5 drops of water is added to each of the beakers containing the MMs and the tablets were stirred until
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as the compounds with lower Rf values‚ the compounds that are most polar tend to stay longer with the polar adsorbent‚ while the least polar compound travels with the eluent that is lower in polarity. 2. TLC in today’s experiment stands for Thin Layer Chromatography. 3. From least polar to the most polar: Heptane-Toluene-Acetone-Methanol-Acetic acid ‚ ‚ ‚ ‚ 4. The Rf (Retardation factor) is the ratio of the distance that the compound/mixture traveled to the distance the solvent/mobile
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Title Page Chelsea Maksin Organic Chemistry Laboratory 1 Column and Thin Layer Chromatography: The Separation of Spinach Pigments Russ Hoburg 02/15/2012 Abstract The main goal in doing the column and thin layer chromatography was to separate spinach extract into its components based on polarity and then to analyze the components. The separation of the spinach extract was done using the column chromatography with the wet/slurry packing method. Alumina was inserted into the column to act as
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first used to separate colored components of plant leaves. Today‚ the name is a bit misleading‚ because most forms of chromatography do not depend on color. Several types of chromatography are commonly used‚ among which are paper chromatography‚ thin-layer chromatography or TLC‚ liquid-liquid chromatography‚ gas chromatography‚ and high performance liquid chromatography or HPLC. Chromatography is so useful that some form can be found in most scientific laboratories around the world. For example‚ in forensic
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SOLUTIONS MANUAL DATA AND COMPUTER COMMUNICATIONS EIGHTH EDITION CHAPTERS 1 - 12 WILLIAM STALLINGS Copyright 2007: William Stallings © 2007 by William Stallings All rights reserved. No part of this document may be reproduced‚ in any form or by any means‚ or posted on the Internet‚ without permission in writing from the author. Selected solutions may be shared with students‚ provided that they are not available‚ unsecured‚ on the Web. -2- NOTICE This manual contains
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allows confidential information such as credit and debit card details to be sent safely to the online business which is receiving these details. Web browsers are able to encrypt purchase details using an encryption method known as SSL (Secure Socket Layer). SSL is switched on when a user visits a secure server site which begins with HTTPS (Secure HyperText Protocol). Encryption works by scrambling the original message with a very large digital number (key). This is done using advanced mathematics.
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between benzonitrile oxide and styrene. 2. Plan: Each student in a group of three will work to create a reaction with the Benzonitrile Oxide with‚ cis-stilbene‚ trans-stilbene‚ or styrene in an Erlenmyer flask. With this Reaction solution thin layer chromatography will be performed using each reaction solution. The different reactions will then be compared by running co-spot TLC’s. An NMR of the crude products from each reaction will be taken. 3. References: * Chemistry 173Q Organic Chemistry
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These peaks show that the solution in vial 4 contained dichloromethane. This is viable because the column did contain dichloromethane‚ which is what the original 0.70 mL of the bottom layer solution was filtered through. Also the .7 mL of the solution that was ran through the column was a dried dichloromethane solution. The peaks that represented 2-naphthol‚ 1630 cm-1‚ 1364 cm-1‚ and 1216 cm-1‚ also showed that the solution in vial 4
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SCIENCE SBT 4534 ANALYTICAL METHODS FOR FUNCTIONAL FOODS & NUTRACEUTICALS LABORATORY REPORT LAB 2: FAT & OIL FROM OIL-SEEDS: PART II THIN LAYER CHROMATOGRAPHY ANALYSIS (TLC) COORDINATORS: ASSOC. PROF. DR. JAMALUDDIN BIN MOHD DAUD ABDUL AZIM ADNAN 1016741 INTRODUCTION TLC chromatography or thin layer chromatography is a type of planar chromatography. TLC is routinely used by researcher in the field of phyto-chemicals‚ biochemistry etc. to identify the
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