negative charge. This indicates that the reaction with the oxygen nucleophile should occur at a faster rate. The final product is determined by using proton nuclear magnetic resonance (H NMR). Oxygen appears farther downfield on an NMR because of its ability to deshield protons (4.7 ppm). Nitrogen will appear around 3.9 ppm and methlylene protons which
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techniques of chemically active extraction‚ vacuum filtration‚ simple distillation‚ and recrystallization. Then identifying information was compiled about these unknowns by obtaining experimental melting/boiling point ranges‚ and analyzing IR and proton/carbon NMR spectrums It was determined that the unknown solid’s identity was m-nitrobenzoic acid and the unknown liquid’s identity was 4‚4-dimethyl-2-pentanone. The calculated percent recovery for the purified crystals was 20.75% INTRODUCTION: 2 The goal
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October 6‚ 2013 Introduction: This experiment was focused on the cooperative identification of organic compound by its chemical properties such as: slow melting point‚ mixed melting point‚ Rf values in TLC experiment‚ IR spectrum analysis‚ and H NMR spectra. Such data can provide the the identity of functional groups and the identity of the compound itself. In this experiment students were taking the slow melting point of their unknown compound. The tabulated list of all melting points of all
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the product can cause either a kinetic or a thermodynamic product to be produced. What type of reaction conditions or electrophiles will cause one or the other product to be made. What product do you think will be made in this reaction? Describe how NMR can be used to determine the structure of the product the relative concentrations if more than one product is made. Procedure: State exactly what was done during the experiment. Results Provide the following quantities and calculations: Mass
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enamine. This condition was leaded good yields (73.6%) without side reactions. Acylation gave an enol form (71.7%) and a keto form (28.3%) of 2-acetylcyclohexanone mixture‚ the composition of which was determined by 1H-NMR spectroscopy. Key words : pyrrolidine‚ enamine‚ mild condition‚ NMR 1. Introduction The formation reactions of carbon-carbon bonds are important in organic synthesis [1-5]. In general‚ acylation reaction is one of the important carbon-carbon forming reactions. It belongs to the
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The goal of this experiment was to synthesize dibenzalacetone by aldol synthesis. The name ’Aldol synthesis’ was taken from the words ’aldehyde and alcohol’. This is because the product of this reaction contains both an aldehyde and alcohol. The carbon-carbon bond-forming reaction is referred to as aldol addition. An aldol condensation yields many species of products if the reactant is more than one. Therefore‚ the aldehyde has to react with itself to yield one product. Procedure: Followed according
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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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Abstract Chemically active extraction was used to separate two unknown compounds from each other and to determine what compound class each compound belongs. The solid unknown was purified by recrystallization and its melting point range was determined to be 109-111°C. The liquid unknown was purified by simple distillation and its boiling point was determined to be 95°C. An IR spectrum was collected for each of the purified compounds; the solid was determined to be 3-toluic acid and the liquid was
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a seperatory funnel which resulted in a gas formation which was controlled with a condenser attached to a gas vacuum. The resulting mixture was then washed to remove excess acids and bases and rotovapped. DEET was synthesized from the experiment as NMR and IR data show strong peaks comparable to the literature values expected for DEET. The percent yield of the product at 56.1% could have been higher by adding more of the limiting reagent toluic acid. Introduction: In this experiment DEET is synthesized
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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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