commercial light stick there is a mixture of hydrogen peroxide solution and a solution containing a phenyl oxalate ester and a fluorescent dye. Here’s the sequence of events when the two solutions are combined: 1. The hydrogen peroxide oxidizes the phenyl oxalate ester‚ resulting in a chemical called phenol and an unstable peroxyacid ester. 2. The unstable peroxyacid ester decomposes‚ resulting in additional phenol and a cyclic peroxy compound. 3. The cyclic peroxy compound decomposes
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purified product identified the Arene strand of 2969.71 indicating C-H stretch. Ester which indicated a C=O stretch of a 1750-1735. Aliphatic amines showed an absorption band of 1217.62 indicating a C-N stretch. (This makes no sense‚ look at the molecule you have and relate the points. Furthermore‚ you need to compare your results to a literature source) An example of a practical application would be using the ester to produce flavors in products. It could be used in a laboratory where they are trying
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red and a white precipitate with silver nitrate(aq) (drop on end of glass rod)‚ if the mixture is poured into water you may detect a ’pleasant’ ester odour‚ can test for HCl but water and amines produce it too!(ii) as for (1) but no ester smell!(iii) You should get a ’pleasant’ characteristic smell of an ester. | (i) R-OH + CH3COCl ==> CH3COOR + HClAn ester and hydrogen chloride are formed(ii) R-OH + PCl5 ==> R-Cl + POCl3 + HCla chloro compound and hydrogen chloride are formed.(i) and (ii) Ag+(aq) + Cl-(aq) ==> AgCl(s) from
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“Fmoc chemistry”. The first part of experiment was the synthesis of L-phenylalanine methyl ester hydrochloride. The methyl ester can be synthesised by reaction of thionyl chloride‚ SOCl2 and dry methanol with L-phenylalanine under reflux condition. The peptide bond was formed later in the experiment‚ where HBTU‚ DiPEA and a solution of Fmoc-Gly-OH in DMF were added to a solution of L-phenylalanine methyl ester hydrochloride in DMF. The product formed was the protected dipeptide‚ Fmoc-Gly-Phe-OMe. The
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Hertig‚Kathleen(1) The Importance of Lipoproteins and How They Effect Our Body and Through Lifestyle Decisions How Cardiovascular Disease Can Be Prevented and or Controlled. Insoluble in water lipids can be defined. To move lipids like fatty acid‚ triacylglycerols‚ steroids and fat soluble vitamins within the blood plasma‚ a mover protein is needed. Moved from the adipose tissue to the muscle‚ heart and liver tissues by serum albumin are fatty acids. Moved by the retinol binding protein
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Ester 1 Ester Folorunsho English composition 101 B.Sterringham 4 April 2013 There are nothing more beneficial than technology. Many might say that its a boom however‚ there are many advantages about technology. Although some met be right that technology can take away self independent and self reliability. It is a privilege to have technology to be able to access information faster and to live a comfortable life. Technology promotes reliable information‚ business‚ and it improve healthcare
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Experiment C. Aim: To protect one of two carbonyl groups (C1) in order to allow the other to react twice with a Grignard followed by removal of the protecting group by acid hydrolysis to give final product (C2). Method: Ethyl acetoacetate (30.03g)‚ ethylene glycol (15.01g) and toluene-p-sulphonic acid (0.13g) were added to a 250 cm3 round bottomed flask‚ containing a stirrer bar and toluene (100 cm3)‚ fitted with a condenser and dean-stark head. Solution was heated strongly under reflux using
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9.3 – The Acidic Environment: Δ. Construct word and balanced formulae equations of all chemical reactions as they are encountered in this module: NOTE: In chemistry‚ [x] means “concentration of x” in moles per litre (mol/L). EG: [H3O+] means “concentration of H3O+ ions” in mol/L. BASIC reactions to remember: Acid reactions: acid + base salt + water acid + metal salt + hydrogen gas acid + carbonate carbon dioxide gas + salt + water Formation of hydronium: H+ + H2O H3O+ Reactions of
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Salicylate. The two compounds we will be preparing‚ aspirin (acetylsalicylic acid) and oil of wintergreen (methyl salicylate)‚ are both organic esters. An ester is a compound that is formed when an acid (containing the COOH group) reacts with an alcohol (a compound containing an -OH group). O C R1 O H O + H O C R2 R1 O R2 + H O H acid alcohol ester water Here R1 and R 2 represent groups such as CH3 - or CH3 CH2 -. The reaction type shown above may be called a condensation reaction
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were oleic acid and triglyceride with one oleate ester. The yields of these compounds were 13.25% and 7.74% dry weight‚ respectively. The compounds were tested in vitro against head lice‚ comparing to the crude hexane extract of the seed. The triglyceride with one oleate ester and the crude hexane extract diluted with coconut oil 1:1. These compounds were found to kill all tested head lice in 49‚ 11 and 30 minutes‚ respectively. The triglyceride ester can be used as a marker for quantitative analysis
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