moves slowly through the packed column. In this experiment‚ an adsorption chromatography column was constructed using silica gel as the adsorbent. A 50:50 mixture of ferrocene and acetylferrocene was then separated using the eluents hexane and tert-butyl methyl ether (TBME). The less polar ferrocene was attracted to the less polar hexane‚ so as the hexane passed through the stationary phase‚ the ferrocene moved with it and the acetylferrocene was left behind. When TBME was passed through the stationary
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Chemistry 2283g Experiment 1 – Alkyl Halides EXPERIMENT 1: Preparation and Reactivity of Alkyl Halides Relevant Sections in the text (Wade‚ 7 ed.) • 6.7 (p. 228) Reactions of alkyl halides • 6.8 – 6.12 (p. 229 – 242) The SN2 reaction: generality‚ factors affecting SN2 reactions‚ substrate reactivity‚ mechanism • 6.13 – 6.14 (p. 243 – 249) The SN1 reaction: mechanism‚ stereochemistry General Concepts The most common of the variety of methods available for preparing alkyl halides is the replacement
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Preparation of 1‚ 4-Di-t-butyl-2‚ 5-dimethoxybenzene Microscale Experiment Leah Monroe April 8‚ 2003 Organic Chemistry Lab II Experiment performed on March 20 and 25‚ 2003 Lab Partners (NMR only): Shannon Land and Jamie Yeadon Abstract: In this experiment‚ 1‚4-dimethoxybenzene reacted with t-butyl alcohol to form 1‚ 4-Di-t-butyl-2‚ 5 dimethoxybenzene via a Friedel-Crafts Alkylation mechanism. A small amount of 1‚4-dimethoxybenzene was dissolved in acetic acid and t-butyl alcohol‚ along with
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------------------------------------------------- Liquid–liquid extraction From Wikipedia‚ the free encyclopedia Liquid–liquid extraction also known as solvent extraction and partitioning‚ is a method to separate compounds based on their relative solubilities in two different immiscible liquids‚ usually water and an organic solvent. It is an extraction of a substance from one liquid into another liquid phase. Liquid–liquid extraction is a basic technique in chemical laboratories‚ where it is performed
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Kinetics of an SN1 reaction: the effect of solvent on rate Object The purpose of this experiment is to determine the rate of hydrolysis in acetone/water (50/50 v/v and 60/40 v/v). Background and Theory An SN1 reaction of tert-butyl chloride takes place in two steps. First‚ the Alkyl Halide will leave the molecule. In this step the bond is breaking‚ which takes a longer amount of time‚ so it will determine the rate of the reaction. As a result‚ it forms a tertiary carbocation‚ since this
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Separating the Layers o Drying Agents o Part 1: The Technique of Neutral Liquid/Liquid Extraction The description is for dichloromethane-aqueous solution mixture‚ but you will use the same technique for your tert-butyl methyl ether-aqueous solution mixture. Note‚ however‚ that the ether is less dense than water‚ while dichloromethane is denser than water. o Part 2: Acid/Base Liquid/Liquid Extraction (p.147-150 middle) 2) THIS HANDOUT: Scheme
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both have the same function‚ they have different characteristics. “BHA is a mixture of the isomers 3-tert-butyl-4-hydroxyanisole and 2-tert-butyl-4-hydroxyanisole‚ also known as BOA.” The molecular formula of BHA is C11H16O2. BHA can be a yellow tainted or white waxy solid and can have an aromatic odor. BHT “also known as 3‚ 5-di-tert-butyl-4-hydroxytoluene; methyl-di-tert-butylphenol; 2‚ 6-di-tert-butyl-para-cresol‚” has a molecular formula of C15H240. BHT physically looks like a white powder. Even
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Separating Acids and Neutral Compounds by Solvent Extraction Introduction The purpose of this experiment was to use solvent extraction techniques in order to separate a mixture consisting of a carboxylic acid (p-toulic acid)‚ a phenol (p-tert-butylphenol)‚ and a neutral compound (acetanilide). Extraction is the process of selectively dissolving one or more of the compounds of a mixture into an appropriate solvent‚ the solution that contains these dissolved compounds is called an extract (Manion
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BOILING POINTS AND MELTING POINTS PART 2 Name: Grethel Zegarra Date of Lab: October 26‚ 2010 Date lab is due: November 2‚ 2010 HYPOTHESIS The boiling point in degrees Celsius will increase as the number of carbon atoms increase. The melting point of the unknown will indicate its mixed substances. The boiling point will increase as a result of the different branching of the OH‚ the melting point will be affected by the different positioning of the OH on the benzene ring. PURPOSE To introduce
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808-823‚ pp 836-842) Purpose: The purpose of this experiment is to determine the nucleophilic strength of chloride and bromide ions as it reacts with 1-butanol (n-butyl) and 2-methyl-2-propanol (t-butyl alcohol) under SN1 and SN2 conditions. Method: 40 g of ice and approximately 30 ml of sulfuric acid is cautiously added to a 100 mL beaker respectively. Weigh 7.6 g of ammonium chloride and 14.0 g of ammonium bromide and place it in another beaker‚ crushing the lumps until a powdery mixture
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