forming small disappearing bubbles within the tip of the separatory funnel. Once the funnel was placed back into the iron ring and the stopper was removed‚ the distinct upper ether layer had an oily appearance and a visible barrier separating it from the lower water-organic base or organic acid layer. After pouring out the ether layer into a beaker and adding anhydrous sodium sulfate‚ all that remained in the funnel was the neutral extract. Isolation The preliminary steps in the isolation of the
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Chapter 2 21. An amino acid having the constitution shown has been isolated from horse chestnuts. It is configurationally related to L-proline and has the R configuration at C-3. Write a stereochemically correct representation for this compound. The addition of carbene by the cuprous chloride catalyzed the decomposition of diazomethane to 3‚4-dehydro-l-proline‚ which led to a combination of cis-3‚4-methylene-l-proline and trans-3‚4-methylene-l-proline in a proportion of 1:3.5. In addition‚ the
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nutmeg is one of those natural sources that trimyristin is easily extracted from it does take some time to achieve in lab. Ground nutmeg seeds are extracted with methyl ether and the resulting solid recrystallized from acetone and to yield pure trimyristin. Most of the other components of Nutmeg remain in the acetone as they are ether soluble. The hydrolysis of trimyristin follows acidification and yields glycerol and myristic acid. After the myristic acid is collected we will be using its melting point
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Improvements in Medicine Matthew Mongold HIS220_6 09/06/2014 Vestyn M. Ensign Improvements in Medicine The improvements in medicine since the 19th century has been truly amazing. They have gone from not having any anesthesia to the anesthesia being a normal thing now for operations from a simple tooth being pulled to major surgeries like open-heart surgery. Other things that has improved majorly is the cleanliness of the operating
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acid. When added to the ether‚ two layers of solution occurred. The top layer was the ether layer that produced an orange colour; while the bottom layer was the NaHCO3 extract which produced a white translucent layer. Therefore‚ this is consistent with the theory.
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Synthesis and Structure of Alcohols Alcohols can be considered organic analogues of water. H O H R O H Alcohols are usually classified as primary‚ secondary and tertiary. H R H OH H primary R R OH R R OH OH R secondary tertiary phenol Alcohols with the hydroxyl bound directly to an aromatic (benzene) ring are called phenols. Nomenclature of Alcohols (Normally any compound’s name which ends in –ol is an alcohol of some sort) IUPAC rules that:
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marked with C‚ Y‚ B and G. Each of the concentrated pigments was dabbed onto their respective rows on each of the three TLC plates using a plastic pipet tip. 3 TLC chambers were prepared using 7mL of each different mobile phase (9:1‚ 8:2 and 7:3 pet ether: acetone solution). The TLC’s were performed and Rf values were measured. All materials were disposed of properly and all glassware was cleaned following correct laboratory
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the Grignard reagent was actually forming. What was happening at a chemical level when the reaction began stirring was that on the surface of the magnesium‚ since the magnesium was partially positive‚ it donated 2 of its electrons with help of the ether solvent‚ causing a bond to form between the bromine and magnesium to form‚ and thus the formation of the Grignards reagent. After this color change was noticed‚ more bromobenzene was added in small 0.5 increments for multiple reasons‚ such as to ensure
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experiment was to separate a mixture of two or more unknown compounds and identify them based on their melting point and reactivity with an acid or a base. Compound studied/Reactions: The organic solvent used in this experiment was methyl t-butyl ether (MTBE‚ 2-methoxy-2-methylpropane). The unknown that dissolved in the MTBE‚ but was insoluble in water. MBTE is very volatile and flammable. It was determined in the experiment that the unknown was an organic base (an amine) that reacted with aqueous
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1 TOPIC 4 Course Learning Outcomes Able to : 1. Explain the fundamental concepts & theories of separation techniques in SFC & SFE. 2. Sketch‚ label the schematic diagrams & discuss the function of each component in SFC & SFE. 3. Identify the strength & limitations of SFC & SFE technique. 4. Suggest and justify the most suitable & efficient separation technique to be employed for an analysis. 2 What is supercritical fluid? 3 Critical temperature (Tc) for any substance is a temperature
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