Post Lab #4- Column Chromatography Organic Chem 3418-2 March 3‚ 2011 Theoretical Background- The fluorene and fluorenone mixture was separated by first dissolving the mixture in heptane. Since “like dissolves like”‚ fluorene dissolves with the non-polar heptane and the polar fluorenone dissolves in the polar ethyl acetate solvent. This phenomenon was illustrated in class before the experiment‚ when it was pointed out why water will not dissolve fluorene‚ fluorenone‚ or transstilbene
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Measure the weight of each individual and place in a 1.5 mL microfuge tube. Place this tube directly into liquid N2 to freeze plant tissue. 2) Remove tubes from the liquid N2 and quickly grind the plant tissue with a pestle. Add 300 L of Methanol 1%HCl and continue to grind the plant tissue. Allow extraction to occur overnight in a dark refrigerator. 3) Add 200 L Milli-Q H20 to each tube. Next‚ go to the fume hood and add 500 L of chloroform to each tube. Spin the tubes in a centrifuge
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For instance‚ the reaction between methanoic acid and methanol is shown below COOH+CH_3 OH →CHOOCH_3+H_2 O Purpose The purpose of this investigation is to verify the smell of esters Method Place 250 mL of deionized water in a 500 mL. Heat this water until it boils. Turn off the heat source after boiling Follow the chart below for the following steps Ester # Acid Alcohol 1 Acetic Acid Butanol 2 Acetic Acid Octanol 3 Acetic Acid Methanol 4 Acetic Acid Ethanol 5 Butanoic acid Butanol 6 Butanoic
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perfumes‚ flavorings‚ colorings‚ and medicines. Another type of acyclic acid is methanol‚ and it is also the simplest sort of alcohol. It is a clear liquid that resembles ethanol is odor and properties‚ but it has a slightly lower boiling point of 64.7℃. Methanol is mainly used as a solvent‚ antifreeze‚ raw materials‚ fuel‚ or as a denaturant for ethanol. Unlike ethanol‚ methanol is extremely toxic since one sip of methanol can cause permanent blindness. Two other kinds of acyclic acid are propan-2-ol
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still for 15 minutes. we then added the product in a beaker than contain 10 grams of ice. We then vacuum filter the product and wash the crystals with cold water and cold methanol. We then began the recrystallization process. During the recrystallization process‚ the product was a white chucky large crystals‚ when the boiling methanol was added there was a color change from white to yellow. The color change was due to the conversion of aromatic properties. We then place solution in an ice bath to recrystallize
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SC/CHEM 3001 3.0 Experimental Chemistry II Experiment A4: Palladium Catalysis: The Suzuki Reaction Abstract In this experiment‚ the Suzuki reaction was performed using phenylboronic acid‚ p-iodophenol and Pd/C catalysis in potassium carbonate aqueous media to synthesize biphenyl-4-ol. The yield of final product was only 11.94% and the measured melting point was 170-175℃. Since the appearance of the product was significantly different from expected light tan color and the measured melting
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Pour the reaction mixture immediately after removal from the oil bath‚ into beakers containing 50 mL stirred methanol. A white precipitate should settle out. If the product is difficult to pour‚ add a small amount of toluene (2 mL) to dissolve it and then pour into methanol. 6. Continue to stir in methanol for another 10-20 minutes. 7. Vacuum filter the solid polymer and wash with methanol several times. 8. Air-dry the polymer or dry the polymer in a vacuum oven at room temperature until constant
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to be made between the IR spectrum for the unknown product‚ as well as the frequencies of methanol and of the unknown plastic. Knowing that methanol has a similar backbone structure as nylon‚ carbon-hydrogen bonds and carbon-oxygen bonds are present within the structure. The unknown plastic‚ however‚ does not contain any of the carbon-oxygen bonds‚ carbon-hydrogen bonds‚ or nitrogen-hydrogen bonds. Methanol had major peaks at approximately 3300 cm-1‚ 2900 cm-1‚ and 2750 cm-1‚ which were relatively
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TPA are solids. DMT has a melting point of 140°C (284°F)‚ while TPA sublimes (goes directly from the solid phase to the gaseous phase). Both processes first produce the intermediate bis-(2-hydroxyethyl)-terephthalate (BHET) monomer and either methanol (DMT process) or water (TPA
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1) First‚ all the materials were gathered and the Boiling point apparatus was assembled. 2) Two mL of methanol were poured into a dry test tube‚ and two small boiling stones were added. The tube was secured to a ring stand so that the surface of the methanol was slightly below the oil level in the beaker and the tip of the thermometer was about 1 cm above the surface of the methanol. 3) The mineral oil was heated. The temperature of the oil bath was checked with a different thermometer
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