ethyl-3-(4-nitrophenyl)acrylate. The prediction was the closer the substituent was to the aldehyde‚ the greater the ratio of E/Z isomers; benzaldehyde was predicted to result in the most similar ratio of E/Z isomers. The ratios of E/Z isomers were determined by using the NMR spectra obtained. A percent conversion was also obtained. Ethyl-3-(2-nitrophenyl)acrylate had a ratio of 9.03:1‚ ethyl-3-(3-nitrophenyl)acrylate had a ratio of 5.2:1‚ ethyl-3-(4-nitrophenyl)acrylate had a ratio of 1:1 and ethyl cinnamate had a ratio
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prepare 2-butanone from 2-butanol. Chromic acid was used in this experiment to in order to prepare 2-butanol. Cr (VI) is rather orange‚ but Cr (III) is dark green - therefore by oxidizing the alcohol (2-butanol)‚ an orange Cr (IV) is reduced to green. NMR and IR tests were taken to determine the result‚ and the crystallized derivative of this product was obtained. PROCEDURE: The experiment followed the instructions in the lab manual‚ except for the empty heating mantle‚ which our TA advised us to use
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literature though Melting point‚ TLC‚ IR‚ 1H and 13C NMR Abstract: The synthesis of the product: β-D-glucose pentaacetate is done though the acetylation using acetic anhydride with D-glucose with the help of sodium acetate. The recrystallization of the product is done though a polar solvent like water. The Result of this experiment has a percentage yield of 61% and analytical methods that are to detect the products are 1H NMR‚ 13 C NMR‚ COSY‚ FTIR (IR)‚ Thin Layer Chromatography (TLC) and
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References: Aldrich Chemical Co‚ Inc. The Aldrich Library of 13C and 1H FT NMR Spectra. 1st ed‚ 1993. Boonyaprapasara N‚ Chokchaicharoenporn O‚ eds. Samunprai Maipuenbaan. Vol. 2. Bangkok: Faculty of Pharmacy‚ Mahidol University‚ 1998: 454 (in Thai). Gritsanapan W‚ Somanabandhu A‚ Titirungruang C‚ Lertchaiporn M. A study on the
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Oxide with‚ cis-stilbene‚ trans-stilbene‚ or styrene in an Erlenmyer flask. With this Reaction solution thin layer chromatography will be performed using each reaction solution. The different reactions will then be compared by running co-spot TLC’s. An NMR of the crude products from each reaction will be taken. 3. References: * Chemistry 173Q Organic Chemistry Lab: Laboratory Manual Notes * Mohrig‚ Jerry R.‚ Christina Noring Hammond‚ and Paul F. Schatz. Techniques in Organic Chemistry. 3rd
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this experiment is to efficiently perform a fischer esterification of 1-Hexanol to form water and hexyl acetate‚ and to confirm the esterification with a nuclear magnetic resonance (NMR) spectroscopy. It was found that 0.3963 grams hexyl acetate was formed with a percent yield of 33.2%. The product was confirmed using NMR‚ IR‚ and boiling point confirmation. Backround: A Fischer Esterification is the formation of an ester and water from alcohol and an acid. More specifically it is a nucleophillic
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There were four signals present in the H1 spectrum at high field (right). The integration of protons was 1:3:2+1:3:6 (2+1 overlapping) in H1 spectrum‚ which implies there were 16 hydrogen present in the compound. Two signals were present at 0.9 and at 2 (singlet). The other two signals were present at 4.9 (multiplet) and 1.5 (looks multiplet because
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it can work as a base by abstracting a proton or it can work as a good nucleophile. When it works as a base it can be added to water‚ alcohols‚ amines‚ acids‚ terminal alkynes and etc. When it works as a nucleophile‚ its nucleophilicity reacts with the electrophilic carbon in a carbonyl group forming a new carbon-carbon bond. Grignard reagents when synthesized are very reactive and thus must be made in an environment free of water or any other potential proton donor. Thus in order to synthesize the
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in the experiment and to distinguish between the two molecules‚ the characteristic long range coupling affects seen in the H1-NMR spectra of bridged six member ring molecules are used. A method for the separation of the two molecules is also explained. This technique can be used as a tool to instruct organic chemistry students in the Diels-Alder reaction and how to use NMR techniques to prove the stereochemistry of the products involved in such reactions. Introduction The Diels-Alder reaction has
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trimyristin’s structure. This indicates that trimyristin was successfully extracted from nutmeg. The myristic acid IR shows stretches at 2914.2 cm-1 and 1693.6 cm-1. Since sodium myristate has the same structure as myrisitic acid aside from the proton of the carboxylic acid‚ the O-H bond stretch is the most significant factor in determining if the myristic acid was indeed synthesized. Thus‚ the 2914.2 cm-1 bond stretch indicates a successful synthesis of myristic
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