In the13C NMR‚ there were 5 peaks‚ which meant that there were five different non-equivalent carbons. With this information‚ it can be deduced that the compound does not have a methyl group attached to a four-carbon chain because the methyl carbon and the first carbon on the chain would be equivalent. This would result in an 13C NMR with 4 peaks‚ so the compound would need to have a five-carbon chain. With the assumption
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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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graduate courses at the University of Pittsburgh for free where he later received his PhD degree in 1962. During his studies‚ he learned about nuclear magnetic resonance (NMR). Then he was drafted into the Army from 1954-1955 then left to work at the State University of New York at Stony Brook. He realized new images could be made from NMR. Lauterbur’s breakthrough idea was to vary the strength of the magnetic field over the object which in turn emitted various radio waves that could be turned into images
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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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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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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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