point range is less than five degrees apart‚ meaning there were not many impurities in the final product. The H’ NMR of the starting material‚ trans cinnamic acid‚ is almost the exact same as the he H’ NMR of the final product. The only difference was the extra signal around 5 ppm. The reason behind the extra signal is the addition of the Bromine to the trans-cinnamic acid. The H’ NMR matched my predictions almost exactly‚ meaning the product is what was suppose to be obtained. All of the signals
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the reaction. The crude product was obtained by vacuum filtration. It was then recrystallized to obtain the pure compound. The recrystallized mass I obtained was greater than 50%. The melting point of the purified product ranged from 72oC- 75oC. 1H NMR‚ TLC‚ and IR spectroscopy was also used to
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Their IR spectra revealed the disappearance of the characteristic hydrazide carbonyl and cyano absorption bands. The 1H NMR spectra showed signals corresponding to the two methylene protons in addition to the aryl and NH proton of the 1‚2‚4-triazole ring.
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an ice bath until crystallization occurs 8. Filter the crude product 9. Recrystallize with 2 mL of EtOH 10. Filter pure product and collect MP and mass 11. Perform a saturation test with a bromine and potassium permanganate solution 12. Obtain NMR from instructor and identify peaks Apparatus: Post Lab: Observations:
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get an accurate weight. The observed melting point of the product was 164-165°C which is a little lower than the theoretical mp value; this can be attributed to impurities in our product. An IR spectrum was given and analyzed for benzophenone. 1H NMR‚ 13C NMR‚ and IR spectrums were also given for benzpinacol and benzpinacolone and the peaks were analyzed for the purpose of recognizing functional groups and noting any similarities and differences between the compounds that were made. 1.Introduction:
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Nitration of Methyl Benzoate to form Methyl-m-nitrobenzoate via Aromatic Substitution Linh Ngoc Thuy Nguyen Seattle Central Community College Professor: Dr. Esmaeel Naeemi Date: February 21st‚ 2012 Abstract In this experiment‚ methyl-m-nitrobenzoate‚ followed the electrophilic addition of aromatic ring‚ would be formed from the starting material methyl benzoate and nitric acid‚ under the catalysis of concentrated sulfuric acid. The reaction between nitric acid and sulfuric acid resulted
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Infrared was recorded on a Perkin-Elmer 1650 FT-IR spectrophotometer‚ using a sample in KBr disks. 1H NMR and 13C NMR spectra were recorded on a Varian Gemini (300 MHZ)‚ using TMS as an internal standard and DMSO-d6 as solvent. Mass spectra were taken on Shimadzu GCMS QP-1000EX instrument by direct inlet technique‚ at beam energy 70 eV. The 3-acetylquinolinone
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hindrance of its benzene rings being so close together. It causes the molecule to twist. E-Stilbene on the other hand does not have to twist due to hindrance and thus has full conjugation. The recrystallized E-Stilbene product is mostly pure as its NMR matches the literature value for E-Stilbene except for the small peak at 6.6 ppm due to a small amount of leftover Z-Stilbene2. This reaction could be improved by using Bromine instead of Iodine because Iodine is very slow and it is possible that more
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Chem 51LC Experiment 6 Lab Report Aldol Reaction Purpose: The purpose of this experiment is to be able to conduct an aldol condensation reaction using an unknown aldehyde and an unknown ketone. H NMR is used to identify the unknown aldehyde and ketone. Melting point is used to identify the aldol condensation reaction. Theory: Condensation reaction is also known as a dehydration reaction. In the mechanism of condensation reaction‚ a bond is formed between two molecules and creates water as a
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involved protecting the ketone of ethyl acetoacetate with a ketal group‚ followed by preparation and reaction with Grignard‚ then purification by extraction and recrystallization. The yield was 78.5%‚ but there are impurities present suggested by 1H-NMR‚ IR‚ and TLC. However‚ the results do indicate the desired hydroxyketone was formed. Introduction: The purpose of this multi-step lab was to synthesize 4-hydroxy-4‚4-diphenylbutan-2-one from ethyl acetoacetate. The Grignard reaction is widely used
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