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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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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ca. 3500 2260-2240 1600-1500 and 1400-1300 m m m m m s -OH‚ -NH CHEMICAL SHIFTS CHCl3 H H 1H-NMR 12 O R C OH 11 R 10 O C H 9 R 8 7 6 H 5 CH2F 4 3 CH2Ar CH2NR2 CH2S 2 1 C H C C C-CH2-C C 0! TMS H CH2Cl CH2Br CH2I CHEMICAL SHIFTS CH2O C C-H C O CH2 C-CH3 carbonyl aromatic; alkene CH2NO2 alkane 13C-NMR CH2 200 150 alkyne 100 50 C-O‚N‚X 0! TMS CHM 2211-U01 SAMPLE EXAM I‚ Page 3 MULTIPLE
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the IR spectra‚ the NMR of the unknown was analyzed. First‚ the general region was predicted to give an idea of how the molecular may look like. Based on the chart‚ it does seem like a ketone was present with a couple of C-H stretches near the functional group. Next‚ four H proton signals and five carbons singles were identified on both of the H and C NMR. Finally‚ the splitting pattern was identified where it provided where the C-H bonds were potentially located on the H NMR . With the molecular
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Introduction PT Newmont Minahasa Raya (NMR) is a joint venture company between Newmont Gold Company (USA)‚ which owns 80 percent of the shares‚ and PT Tanjung Serapung (Indonesia) holding 20 percent. PT. NMR is located in South East Minahasa‚ some 80 km south of Manado‚ the capital of North Sulawesi. PTNMR operated an open pit mine from 1996 and ceased operations in 2001 after the deposit was recovered . They started producing gold in 1996 and began dispose their whole tailings through the pipe
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fact that the OH is acidic enough that the hydrogen exchanges quickly with the solvent. The hydrogen dissociates and associates so quickly that the NMR machine cannot detect this. As a result‚ no peak is shown for the OH group. The hydrogen bonds and the interaction processes occur interrupt and skew any chemical shifts that would be observed in the NMR spectrum (Dollenmeier‚
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of 6M hydrochloric acid was added in 5ml increments until the solution had a pH lower than 2. The flask was swirled for 3 minutes and then vacuum filtered for about 3 minutes. The product was then weighed and the percent yield was calculated. The H NMR was then obtained for this product‚ the remainder of the product was used to run the IR spectrum. However‚ since there was a fire alarm for this lab‚ we were not able to obtain the IR spectrum of our product. Also‚ the solution was not filtered
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verify the presence of the ketone 2‚4-dinitrophenylhydrazone was synthesized and reacted with trans-p-anisalacetophenone resulting in a red color change indicating the presence of the ketone. The percent yield of the product was found to be 49% with six NMR shifts at 1.76‚ 2.14‚ 3.83‚ 6.98‚ 7.53‚ and 7.97 ppm. The melting point was originally found to be 169.7-180.1 °C but was determined to be an error. Introduction: In this experiment an acetophenone is treated with Sodium hydroxide to produce an enolate
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The percentage yield was calculated to be (0.1203/2.352) *100 = 5.11%. A sample of the crystals was then taken and dissolved in around 1 ml of deuterated chloroform and the solution was transferred was transferred to an NMR tube. The NMR tube was handed to the lab TF and the NMR spectrum was received a few hours later. Post-lab Conclusions The percent yield calculated was around 5%. The percent yield of the white crystal
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