In this experiment the objective was to perform a Diels-Alder reaction using cyclopentadiene and maleic anhydride to synthesize the product‚ cis-Norbornene-5‚6-endo-dicarboxylic anhydride. The Diels-Alder reaction is one of the most important reactions in organic chemistry and was first investigated by Otto Diels and Kurt Alder in Germany. It is a [4+2] concerted cycloaddition reaction which involves a diene and a dienophile. The Diel-Alder reaction are mainly used for creating new carbon-carbon
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flask with 0.93 g of unknown to dissolve it. After reaching room temperature‚ the flask was placed into a bucket with ice and DI H2O. The unknown was collected by vacuum filtration‚ rinsed with ice water‚ and dried to constant mass at 0.72 g. 13C NMR (100.13 MHz‚ acetone-D6): σ 15.5 (s‚ Me)‚ 24.3 (s‚ Me)‚ 29.9 (s‚ Me)‚ 30.1 (s‚ Me)‚ 30.3 (s‚ Me)‚ 30.5 (s‚ Me)‚ 30.7 (s‚ Me)‚ 30.9 (s‚ Me)‚ 31.1 (s‚ Me)‚ 64.7 (s‚ Me)‚ 115.7 (s‚ C=C)‚ 122.5 (s‚ C=C)‚ 133.5 (s‚ C=C)‚ 156.4 (s‚ C=O)‚ 170.8 (s‚ C=O)‚ 210
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Tinnitus referred as ears ringing‚ in humans‚ can be caused by a variety of factors; such as high-level sound exposure‚ ototoxic drugs‚ and hearing loss. It is basically the self perception of sound in the absence of acoustic stimulation. the sound waves hit the outer ear and converge into the ear drum. The vibrations at ear drum are transferred into the inner rear through the middle ear. Once the sound waves reach inner ear‚ they travel through the cochlea towards the organ of corti. Further the
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Allelopathic activity of the aqueous methanol extracts of Mangifera indica L. leaves The aqueous methanol extracts obtained from mango leaves inhibited seed germination of radish and sand fescue‚ and inhibited seedling growth of root and shoot growth of radish‚ rapeseed‚ sand fescue and crabgrass (Figure 1 and 2). The extract obtained from 0.03 g dry weight of mango leaves inhibited 20 and 50 % germination of radish and sand fescue respectively‚ on day 4 (Figure 2). The extract obtained from 0.03
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Objective: The purpose of this experiment was to prepare the Grignard reagent methylmagnesium iodide and react it with benzoin to form the 3o alcohol 1‚2-diphenyl-1‚2-propanediol‚ through an addition reaction pathway. Introduction: Grignard reagents are alkyl or aryl-magnesium halides that act as the nucleophile in Grignard reactions‚ where ketones are reacted with the reagent‚ then treated with acid to produce an alcohol. In the case of this experiment‚ methylmagnesium iodide was created
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Techniques: Qualitative and Quantitative analysis of organic compounds‚ Carbohydrates ‚ amino acids‚ DNA & RNA and fatty acids. • Spectroscopic Techniques: Structural determination of an Organic compound by using UV & Visible ‚ IR ‚ NMR ‚ MASS techniques. • Chromatographic Techniques: Paper‚ Column ‚ Gas-Liquid chromatography ‚ High performance liquid chromatography etc. Computational Skills: Operating Systems : Win XP‚ 2000‚ 98‚ Languages
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macrocycle in to the biphenol station of the Rotaxane. This was supported by NOESY 1H NMR that showed a shift in the peaks in retrospect to Rotaxane solution containing CD3CN (Figure 5.5). Addition of deuterated pyridine (d5-pyridine) neutralised the d-TFA and hence oxidiation of the benzidine residue occurred and the macrocycle had shuttled back to bind to the residue in its favourable conclusions obtained from the 1H NMR spectroscopic studies are supported by room-temperature ultraviolet/visible spectroscopy
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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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Cited: Brindle‚ JT‚ H. Anti‚ and E. Holmes. "Rapid and noninvasive diagnosis of the presence and severity of coronary heart disease using 1H-NMR-based metabonomics" ["Rapid and noninvasive diagnosis of the presence and severity of coronary heart disease using 1H-NMR-based metabonomics"]. Nat. Med. 8.12 (2002): 1439-44. Print. Felson‚ D. T. "Osteoarthritis as a diesease of mechanics" ["Osteoarthritis as a diesease of mechanics"]. Osteoathritis and cartilage
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Lead Toxicity Has No Felicity For centuries‚ Lead (Pb) has been used in various industries—most notoriously‚ the paint industry—and although lead-based paint has been significantly reduced in developed regions‚ it still infiltrates many American homes concentrated in low-income areas. Studies have shown that lead is able to mimic certain metals that are significant in biological processes‚ leading to a collection of developmental and physiological conditions commonly grouped as “lead poisoning.”
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