filtration. The precipitate was allowed to dry for recrystallization. The product was removed from the filter paper and weighed. The weight of the product was 1.445g. NMR was conducted by mixing the dry product (0.35mg) with duderated chloroform (0.50ml) and mixing until the precipitate dissolved. The sample was then placed into the NMR. The NMR spectrum confirmed the product was benzocaine. The remainder of the sample was placed into a 250ml beaker for recrystallization. Methanol and deionized water were
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Biosynthesis‚ characterization and applications of biosurfactant produced by Pseudomonas cepacia using de-oiled rice-bran Garima Bhardwaj1‚ Swaranjit Singh Cameotra2‚ Harish Kumar Chopra1* 1*Department of Chemistry‚ Sant Longowal Institute of Engineering and Technology‚ Longowal - 148106‚ Distt. Sangrur (Pb.)‚ India. E-mail: hk67@rediffmail.com Fax: 91-1672-280072; Tel: 91-1672-305204 (O) 2Institute of Microbial Technology‚ Sector-39-A‚ Chandigarh-160036‚ India Abstract: Pseudomonas cepacia MTCC
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Preparation of N‚N-Diethyl-m-toluamide (DEET) and its Identification by IR and NMR Spectroscopy Eim A. Chemist CHEM 304 July 10‚ 2005 INTRODUCTION N‚N-Diethyl-m-toluamide (DEET) is the active ingredient in many insect repellants.1 In this experiment‚ DEET will be prepared from m-toluic acid through the intermediate acid chloride and then identified by its IR and proton NMR spectra. The overall reaction is a series of two acyl substitutions and is shown in Scheme 1 below: [pic] Scheme
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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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