gift sample was Yellow colored‚ odorless crystalline powder (Table 5.1). 5.2 DRUG IDENTIFICATION Amphotericin B was identified by the procedures described in British Pharmacopoeia 2003. 5.2.1 Chemical Test In a drug solution (1 mL of 0.05% w/v) in dimethyl sulfoxide (DMSO)‚ 5 mL of orthophosphoric acid was added. A blue ring was observed at the
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to hydrogen atom. The initial product of the acid-base reaction is trimethylnitronium chloride. In the below example number two‚ aluminum chloride is Lewis acid and dimethyl ether is Lewis base. A curved arrow originates from oxygen atom and point to aluminum atom. The initial product of the acid-base reaction is aluminum dimethyl ether chloride. (1)(CH3)3N + HCl→(CH3)3N+H + Cl-(2)AlCl3 + CH3OCH3→Al-Cl3O+(CH3)2ReferencesWikipedia‚ the free encyclopedia. Lewis Acid.
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the United States military. Out of this research came the discovery of the repellent dimethyl phthalate in 1929. This material showed a good level of effectiveness against certain insect species‚ but it was ineffective against others. Two other materials were developed as insect repellents. Indalone was found to repel insects in 1937‚ and Rutgers 612 (2-ethyl-1‚3-hexane diol) was synthesized soon after. Like dimethyl phthalate‚ these materials had certain limitations which prevented their widespread
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Thin Layer Chromatography Submitted in partial fulfillment of the requirements for: CHE 324 Organic Chemistry Laboratory Dr. Robert Duncan Fall Semester 2012 Caitlin Inman‚ Team Leader October 9‚ 2012 Tyler Byrd‚ Data Collection Shared Role‚ Technique Expert Introduction: “Chromatography is used to separate components of a mixture. For example‚ imagine a mixture of wood pieces‚ pebbles‚ and large rocks to be separated and the chromatography setup as a stream. Flowing water
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CHM 2210 – Fall 2012 – Test 4 Name (print):_________________________ 1. What is the IUPAC name for the following compound? a) b) c) d) 3-methyl-1-penten-4-yne 3-methyl-1-buten-4-yne 4-methyl-4-penten-1-yne 4-methyl-4-buten-1-yne 2. What is the major organic product obtained from the following reaction? 2 equiv Br2 a) b) c) d) 2‚3-dibromobutane 2‚2‚3‚3-tetrabromobutane 2‚3-dibromobutene 2‚2-dibromobutane 3. What is the best choice of reagent(s) to perform the following transformation
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aniline. Make also a diazonium salt using nitroaniline using the same process. B. Coupling Make stock solutions of the following compounds to be coupled with the diazonium compounds above. Use‚ phenol‚ naphthol and dimethyl aniline. Dissolve each in 4 mL 10% NaOH. For dimethyl aniline‚ include 250 mg pyridine. The reactions proceed with stirring and solid precipitates formed rapidly. The
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require very much energy in order to make the cyclohexene ring and the result can create four stereo centers‚ making it compatible for a variety of functional groups which still has double bonds in the products. Dimethyl Tetraphenylphthalate. Tetraphenylcyclopentadienone (0.100g)‚ dimethyl acetylene-dicarboxylate (0.1mL)‚ and nitrobenzene (1mL) was placed into a reaction tube with a boiling stick. The reaction was heated until the purple solution turns tan and refluxed. Ethanol(3mL) was stirred in
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A correct IUPAC name for the following compound is: A) 3‚6‚7-trimethyl-4-bromo-1-octene B) 4-bromo-3-methyl-6-isopropyl-1-heptene C) 4-bromo-3‚6‚7-trimethyl-1-octene D) 4-bromo-6-isopropyl-3-methyl-1-heptene E) 4-bromo-6-isopropyl-3‚6-dimethyl-1-hexene *5. Which alkene would yield 3-methylpentane when subjected to catalytic hydrogenation? A) B) C) D) E) *61.What product is formed on reaction of hydrogen chloride with 1-pentene? 1
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don’t have any bonds either. b) The Lewis dot structure doesn’t follow the octet rule‚ have the correct number of electrons‚ or any bonds. 74) Ethyl alcohol and dimethyl ether each have to same molecular formula‚ C2H6O. Ethyl alcohol has a much higher boiling point (78°C) than dimethyl ether (-25°C). Propose an explanation for this difference. Ether molecules cannot form hydrogen bonds with each other and therefor result in a much lower boiling point than alcohols.
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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 of this lab was to isolate two unknowns‚ one solid and one liquid‚ from an ethereal solution using chemically active‚ or acid-base‚ extraction
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