during the second and third qualitative tests (Noller‚ 1953). These preciptates therefore suggest that sodium myristate was successfully synthesized. The myristic acid NMR analysis (attached to the end of the report) also indicates a successful synthesis. Aside from the acetone and DCM impurities‚ the myristic acid NMR shows hydrocarbon peaks at 2.213ppm and .879ppm. These peaks coupled with the fact that sodium myristate would not dissolve in the organic dichloromethane solvent indicates that
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In this experiment‚ the stereochemistry of 2‚3-dibromo-3-phenylpropanoic was found to determine syn or anti addition of bromines. The melting point was 199-203°C and the NMR J values angle is at 167 which both prove the erythro-2‚3-dibromo-3-phenylpropanoic. Determination of the Stereochemistry of 2‚3-dibromo-3-phenylpropanoic acid. Introduction The purpose of this experiment was to determine the mechanism of the reaction of trans-cinnamic acid with the addition of bromines to 2‚3-dibromo-3-phenylpropanoic
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reaction using a phosphorus-containing Hornes-Emmons-Wittig reagent to generate an enolate anion of trimethyl phosphonoacetate instead of a phosphorus ylide. The methyl trans-4-methoxy cinnamate produced is then analyzed using melting point and 1H NMR spectroscopy. Theory The Wittig reaction prepares alkenes from carbonyl compounds by attacking a phosphorus ylide with a nucleophilic carbon atom stabilized by a triphenylphosphonium group. An ylide is a compound that contains two oppositely charged
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new series of triorganotin(IV) complexes of monofunctional bidentate Schiff base have been synthesized and characterized through elemental analysis‚ conductance measurements‚ molecular weight determinations‚ UV-visible‚ multinuclear (1H‚ 13C‚ 119Sn) NMR spectroscopy‚ FT-IR‚ X-ray powder diffraction and theoretical calculations. On the basis of these techniques‚ it is proposed that the ligands are bounded to the tin atom through the azomethine nitrogen and carboxylate oxygen. The data reveal that triorganotin(IV)
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Three-Dimensional Structure of Proteins Rotation around the -Carbon in a Polypeptide A Sterically Nonallowed Conformation The Helix and Pleated Sheet Conformationally allowable structures where backbone is optimally Hbonded (linear Hbonds). Helix (3.613 Helix): •3.6 residues/turn •Rise = 0.15 nm/ residue •13-atom hydrogenbonded loop Linus Pauling and Robert Corey‚ 1950 Pleated Sheet: •Anti-parallel or parallel •2.0 residues/”turn” •0.34 nm/residue (anti-parallel) or 0.32 nm/residue
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possible to match an unknown compound with a known compound because similar compounds will display similar characteristics. In this experiment‚ identification of the unknown ketone is accomplished through thin layer chromatography‚ melting point‚ and 1H-NMR spectroscopy. The unknown ketone is from a homologous series of methyl ketones. CH3CO (CH2) nCH3 The first step in the lab is the preparation of the solvent used in the developing chamber for thin layer chromatography. The solvent used is a 3:1 mixture
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Substitution Reactions of 3-phenyl-1-phenol‚ 2-pentanol‚ and 2‚4-dimethyl-3-pentanol Samantha Sparks‚ Isi Nosegbe and Sabrina Becker. Department of Chemistry‚ IUPUI‚ 402 N. Blackford St.‚ Indianapolis‚ IN 46202 This project was collaborated on by three different organic chemistry students‚ who individually synthesized and researched each of the three substitution reactions in this experiment.. The first reaction was an Sn2 reaction of 3-phenyl-1-propanol with NaBr and H2SO4 to create1-bromo-3-phenylpropane
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compound. The other two peaks correspond to the peaks of aromatic carbon-carbon double bonds. The proton NMR acquired indicates two different hydrogen’s present in the compound which correctly corresponds to triphenylmethanol. The peak at about 7.4ppm is the peak for the aromatic hydrogens on the three phenyl rings. The peak at about 3.6ppm is the hydrogen part of the hydroxyl group. The carbon NMR acquired also corroborates the conclusion that the final compound is triphenylmethanol. The peak at
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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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that was beginning to kill many people all over the world. She had always had a special bond with her grandson and always supported his research. Inspired by her‚ Raymond began to test cancerous liver samples in rats using nuclear magnetic resonance (NMR) equipment. This equipment wasn’t new by any means and was already being used in bio-chemistry and geology to study rocks and minerals. It worked by putting a nuclei in a magnetic field which then emitted and reabsorbed electromagnetic radiation. This
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