on the Heinemann website. 2. Read Section 13.5 in your Chemical Ideas book which deals with naming and making esters. Chemical Ideas 1. While doing Chemical Ideas 13.5 there is no need to cover polyesters (page 318) or ester hydrolysis (page 319). These will be covered in Designer Polymers (DP). As a result there is no need to do Problems 4‚ 6 (parts d & e) or 8 (parts d & e). 2. Add Esters from salicylic acid (page 315). 3. Note that the anhydride reactions on pages 318–319 do not need to be learned
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SYNTHETIC EXPLOITATION OF ENZYMES: BIOCATALYSIS IN ORGANIC SOLVENTS: FUNDAMENTALS ENZYMES IN ORGANIC SYNTHESIS 1. Enzymes catalyze a broad spectrum of reactions with high turnover numbers. Rate enhancements approach 1012 fold. 2. Enzymes may accept a wide range of substrates. 3. Enzymes are highly regio and stereoselective. 4. Enzyme reactions take place under mild conditions; this minimizes problems of isomerization and racemization. 5. Enzymatic processes are less hazardous and polluting
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South Africa. b. Department of Pharmacy and Pharmacology‚ University of Bath‚ United Kingdom. Abstract Synthesis of sodium butyldithiocarbamate pentahydrate‚ C5H20NNaO5S2‚ entailed a one-pot synthesis. The process of synthesis involved the use of butyl amine‚ carbon(IV) sulfide and sodium hydroxide at a temperature < 0oC. Crystals were obtained and the compound was characterized with elemental analysis‚ Fourier infra-red spectroscopy (FT-IR)‚ Ultra-violet visible (UV-VIS)
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1. Identify the natural sources of sulphur dioxide and oxides of nitrogen. SO2‚ natural: - Geothermal hot springs and volcanic activity are natural sources of SO2. - In the process of decaying of organic matter some bacteria will produces hydrogen sulphide as a waste product which will oxidise‚ forming so2. - Phytoplankton release dimethyl sulphide (DMS) into the atmosphere‚ when this is oxidised it forms sulphuric acid. NOx‚ natural: - Lightning activity generates high temperatures to allow
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bonds between ethanol molecules. B. To measure the strength of hydrogen bond formed between ethanol molecules C. To investigate the formation of hydrogen bonds between molecules of ethyl ethanoate and trichloromethane. D. To measure the strength of hydrogen bond formed between molecules of ethyl ethanoate and trichloromethane. Procedure A. 1. 10 cm3 of ethanol was added into an insulated 50 cm3 beaker by using a measuring cylinder. The temperature of the liquid was measured.
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MATERIALS REVOLUTION UNIT REVISION BOOKLET Vikram Mahal How To Use this Booklet: This booklet has been created by addressing all the points on the OCR B salters specification for the section‚ what’s in medicine. I advise reading through the Book‚ highlighting or underlining words written in ALL CAPITALS. I also suggest making a spider diagram or mind map to summarise key points and help the information here stick in your mind. You could also draw your own images by points on this
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SERANGOON JUNIOR COLLEGE General Certificate of Education Advanced Level Higher 2 CHEMISTRY JC2 Preliminary Examination Paper 1 Multiple Choice Additional Materials: Data Booklet Optical Mark Sheet (OMS) 9647/01 23 August 2011 1 hour READ THESE INSTRUCTIONS FIRST On the separate multiple choice OMS given‚ write your name‚ FIN/NRIC and class in the spaces provided. Shade correctly your class and FIN/NRIC number. Eg. If your NRIC is S9306660Z‚ shade S9306660Z for the item “index number”. There
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raspberries‚ cucumbers‚ carrots and olives produce parabens to protect themselves against bacterial attacks -unwise to switch to other‚ newer‚ synthetic or untested preservatives‚ just to say you don’t use parabens. Parabens are a family of alkyl esters of para-hydroxybenzoic acid that differ by various chemical substitutions. Up to 60 percent of whatever we place on our skin goes into our blood stream. Yet companies are blatantly adding ingredients to our personal care products and our food deemed
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Chikungunya is a bacterial disease that is transmitted to people by mosquitoes. Outbreaks usually have occurred in countries such as Africa‚ Asia‚ Europe and areas close to the Indian and Pacific oceans. In late 2013‚ America had their first patient that had the virus chikungunya. It was found on the islands in the Caribbean’s. Travelers that travel the world are at high risk of getting this bacterial virus chikungunya. There is no vaccine or any type of medications that can prevent the bacterial
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spectra are needed to correctly determine the structure of B. By comparing the IR spectrum for Compound B it can see that it is 1-(4nitrophenyl)ethanoate‚ this is indicated by the peak at 763.16cm-1 when compared against literature values for IR Spectroscopy shows a C-H bend in the ortho position of the phenyl ring‚ which points to the position of ethanoate being on the 4th carbon. Looking back at the yields it can be see that there has been an error in the drying process for Benzanilide resulting
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