Alkene addition: Bromination of (E) Stilbene Introduction: In this lab we used the greener approach‚ which involves the addition of bromine across a double bond. When bromine reacts with E-stilbene (trans-1‚2-diphenylethene)‚ two new chiral carbons are created from the sp2 carbons‚ therefore 3 different dibrominated stereoisomers are possible: meso-(1R‚2S)‚ or the raceminc mixture-(1R‚2R) or (1S‚2S)-dibromo-1‚2-diphenylethane (Gilbert‚ 2010). When the bromination ion intermediate proceeds
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The purpose of this experiment was to isolate and purify cholesterol from egg yolks. Two hard boiled egg yolks were twice extracted with diethyl ether and methanol‚ with the filtrate collected via vacuum filtration. Potassium hydroxide pellets were added to the filtrate‚ the ether was distilled off‚ and the mixture was saponified by reflux. The crude cholesterol was isolated through a series of ether extractions and aqueous washes; then the ether was dried with MgSO4 and removed by rotary evaporation
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Bromination Solo Experiment 3 – Individual Lab Report (Save as pdf and submit‚ due by 12:00 NOON one week after experiment) Last Name: First Name: TA Name: Date Lab Performed: Date Lab Submitted: Group A‚ B‚ or C: Comments for Grading TA: (Please indicate if you performed the lab on a day other than your regularly scheduled day and/or with a TA other than your regular TA). Page Limit: report must not exceed FIVE pages (including this page) LIMIT DOES NOT INCLUDE ANY GRAPHS‚ SPECTRA
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to keep the risk of heart disease. If your total cholesterol number is between 200 and 239‚ you have borderline high cholesterol. Any cholesterol level of 200 mg/dL or more increases your risk heart disease. More than half the adults have levels above 200 mg/dl. 33 mg/dL HDL that is the "good cholesterol" is too low. HDL "good cholesterol" should be above 40. HDL is the good cholesterol that cleans up the bad cholesterol. When LDL "bad cholesterol" is 160-189 mg/dL means it is high‚ and this high
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Cholesterol gets so much bad press that it is hard to believe that your body actually needs it. There are two kinds of cholesterol in your body‚ good cholesterol which is commonly known as HDL cholesterol‚ and bad cholesterol or the more common name‚ LDL cholesterol. Cholesterol in your body is necessary to make hormones‚ vitamin D and bile salts and so is a necessary part of your normal body’s functioning. The bad cholesterol on the other hand can cause you lots of problems. The main worry with
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high cholesterol? Cholesterol is a fat-related compound made in the liver and other cells. The normal or therapeutic level of cholesterol in an individual’s body is less than 200 milligrams. An excessive amount of cholesterol deposited in blood vessels may be a factor of many disease conditions. Where does cholesterol come from? A major source of cholesterol comes from the food eaten by an individual. When too much cholesterol is taken‚ the body creates a response wherein the blood cholesterol rises
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Cholesterol Research Paper | By: Diana Rivera | | Cholesterol is a fatty‚ soft substance found in all of your body. The body needs it to work properly such as holding cells together and to also make hormones such as estrogen‚ testosterone‚ cortisol‚ vitamin D‚ and substances to help you digest foods. They body actually makes most of what it needs in the liver and the rest comes from food you eat such as meats‚ fish‚ eggs‚ butter‚ and whole milk. Bad cholesterol is considered when too much
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al Chain Reactions: Bromination of Arenes Introduction The purpose of the bromination of arenes was to determine the different reactivities of different hydrocarbons with different hydrogen atoms when reacted with bromine under free-radical substitution. The time it took for the bromine color to disappear was used to determine the order of reactivity of the different hydrocarbons. Data and Results The data of the 10 hydrocarbon tubes and the 2 control tubes with bromine and dichloromethane in
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Abstract The bromination of trans-cinnamic acid was completed to determine dibromide’s stereochemical structure and its mechanism. After the addition of bromine to trans-cinnamic acid‚ the product was identified by its melting point and infrared spectrum resulting in erythro-2‚3-Dibromo-3-phenylpropanoic acid after comparing similar properties. Introduction In this lab‚ the bromination of trans-cinnamic acid was completed to determine dibromide’s stereochemical structure‚ and from there determine
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Lab 3: Bromination of Acetanilide CHEM 2110 Hassan Alsaleh 0525970 Due date :11/02/2015 Q1: To find the limiting reagent we need to find the number of moles of acetanilide‚ and the number of moles of Bromine. Mass of Acetanilide used = 0.67g Molar mass of Acetanilide = 135.16g/mol[1] Number of moles of Acetanilide = (0.67g) / (135.16g/mol) = 0‚005 mols Volume of Bromine = 0.25ml Density of Bromine = 3.103 g/ml[2] Mass of Bromine = (0.25ml) X (3.103g/ml) = 0.78g Molar mass of Bromine
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