Bromination of trans- Stilbene to form 1‚2- Dibromo- 1‚2-diphenylethane Abstract 1‚2-dibromo-1‚2-diphenylethane was produced by the bromination of trans-stilbene through the addition of hydrobromic acid (HBr) and hydrogen peroxide (H2O2). This experiment was a greener bromination of stilbene because bromine was generated in situ and ethanol was used as the solvent. The melting point (243.30°C)‚ mass (.427g)‚ and percent yield (45.54) of the crystals were recorded. The FTIR
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Greener Brominations Abstract In this experiment‚ trans-stilbene was brominated and debrominated with the use of three methods: bromination with pyridinium tribromide‚ bromination with hydrogen peroxide and hydrobromic acid‚ and debromination with zinc. The yields of parts A‚ B‚ and C are as follows: 68.6 %‚ 54.6 %‚ and 55.9 %. Introduction In the chemical process of bromination‚ an alkene is halogenated with bromine. Solvents that are typically used include methylene chloride and carbon
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Bromination of Acetanilide Objective: The objective of this experiment was to use melting point and NMR to determine which of two isomers‚ ortho or para‚ would most likely form after brominating Acetanilide through electrophilic aromatic substitution. Procedure/Observations: 1. Weigh out ~280 mg of acetanilide in a 10 mL r.b. flask with a stir bar. 2. Then‚ add 2.0 mL of glacial acetic acid using a calibrated Pasteur pipet. 3. Stir the mixture until all of the acetanilide has dissolved
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Bromination of Acetanilide Introduction: Bromination of acetanilide to 4-bromoaniline was studied in this experiment. One of the most important mechanism with the reaction of aromatic compounds is the electrophilic aromatic substitution reactions(wade‚2013). The electrophilic aromatic substitution enable scientists to make substituted aromatic compounds. However‚ substitution groups affect the electrophilic substitution mechanism. A nitrogen atom attached to hydrogen is learned to be a powerful
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BROMINATION OF ACETANILIDE OBJECTIVE Aim of the experiment was too brominate acetaldehyde to form p-bromoacetanilide. INTRODUCTION Acetanilide is a chemical compound with the chemical formula of C6H5NH(COCH3). It is a crystalline solid that is prepared by acetylation of analine and is widely used in the dye industry. This crystalline solid is an odourless solid chemical that has a flake or leaf like appearance. It is also known as N phenylacetamide‚ acetanil or acetanilide. Its former
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Form 6 Chemistry Practical Experiment 18: Cis-Trans Isomers of But-2-enedioic acid Introduction Cis-trans isomers are a kind of stereoisomers called geometrical isomers. Due to the inability of rotation about the C=C bond‚ some compounds possess cis and trans isomers. But-2-enedioic acid is an example of having both isomers. Maleic acid Fumaric acid Cis and trans isomers have different physical properties such as boiling point‚ solubility‚ density and stability
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EXPERIMENT A: CIS-TRANS CONVERSION OF BUTENEDIOIC ACID PRE-LAB ASSIGNMENT 1. Maleic acid is the cis version and fumaric acis is the trans version of butenedioic acid. 2. 3. See attached paper. 4. Maleic anhydride is the compound that crystalizes in part A in the experiment. 5. HCl acts as a catalyst to break one of the carbonyl group in the maleic acid which rotates the structure to form a trans structure of the butonal acid which is the fumaric acid. And it does so by donating
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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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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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I picked the second quote‚ “trans fats should not be banned. Consumers should make their own choices about what they eat. The government should educate the population about the risks of eating foods with Trans fats‚ but then let people make their own decisions.” The way I look at this situation is‚ we do a lot of bad things to our bodies. We eat fast food‚ sugars‚ drink alcohol and plenty more. Everything that we take into our body systems‚ has some type of effect on our bodies‚ whether it be causing
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