Electron Spin Nuclear Magnetic Resonance (NMR) Spectroscopy Organic Chemistry BCH3015 • Electron spin is quantized. • The spin quantum number ms has only two allowed values: ms = +½ or –½ • The two directions of spin create oppositely spin create oppositely directed magnetic fields. fields. 61 Proton Spin Organic Chemistry BCH3015 62 Nuclear Spin States • A proton (the nucleus of a 1H atom) also possesses spin. For each nucleus having the spin quantum number
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separate vials‚ label and store. 13. Disassemble and clean the fractional distilling apparatus using hexane for the joints and acetone for the glassware. III. Observations O O O O Ethyl Acetate Butyl Acetate (boiling point ~ 78◦C) (boiling point ~ 120◦C) Initial temperature of fractional distillation apparatus:
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2-methyl-2-pentanol 3-phenyl-2-butanol 3‚4-dinitrophenol Many alcohols are named using non-systematic nomenclature OH OH H3C C OH H3C H3C OH HO OH HO OH benzyl alcohol (phenylmethanol) allyl alcohol (2-propen-1-ol) tert-butyl alcohol (2-methyl-2-propanol) ethylene glycol (1‚2-ethanediol) glycerol (1‚2‚3-propanetriol) 79 40 17.2: Properties of alcohols and phenols: Hydrogen bonding: The structure around the oxygen atom of an alcohol or phenol is similar
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NPC Natural Product Communications Phenolic Composition‚ Antioxidant Capacity and Antibacterial Activity of Selected Irish Brassica Vegetables 2011 Vol. 6 No. 9 1299 - 1304 Amit Kumar Jaiswal‚ Gaurav Rajauria‚ Nissreen Abu-Ghannam* and Shilpi Gupta School of Food Science and Environmental Health‚ College of Sciences and Health‚ Dublin Institute of Technology‚ Cathal Brugha Street‚ Dublin 1‚ Ireland nissreen.abughannam@dit.ie Received: November 28th‚ 2010; Accepted: May 22nd‚ 2011
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Diploma Programme Chemistry data booklet First examinations 2009 Diploma Programme Chemistry data booklet First published March 2007 Revised edition published September 2008 International Baccalaureate Peterson House‚ Malthouse Avenue‚ Cardiff Gate Cardiff‚ Wales GB CF23 8GL United Kingdom Phone: +44 29 2054 7777 Fax: +44 29 2054 7778 Website: http://www.ibo.org © International Baccalaureate Organization 2008 The International Baccalaureate (IB) offers three high quality and
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between elimination reactions under acidic and basic conditions through an analysis of two separate reactions: an acid-catalyzed dehydration of 1-butanol and 2-butanol using sulfuric acid and a dehydrobromination under basic conditions using potassium tert-butoxide of 1-bromobutane and 2-bromobutane. The products of all four reactions will be analyzed with gas chromatography‚ which separates organic compounds to see how each reaction’s product are formed under the constraints of stereochemistry and regiochemistry
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www.kalvisolai.com 5 Mark Compulsory Problems with Solution 1 +2 CHEMISTRY Q. 70 Compulsory Problems with Solution Problems are solved in easiest way (As per Government Answer Key) www.kalvisolai.com 5 Mark Compulsory Problems with Solution 2 SALIENT FEATURES Dear Students ❆ Q.No: 70 is asked as compulsory problem in Govt Exam. ❆ Two problems to be answered out of four problems. ❆ To simplify the problem‚ hints and expected compounds related to molecular formula‚ general formula are
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distillation techniques: simple and fractional. Simple distillation was done to separate ethyl acetate—which has a usual boiling point of 77º—from a less volatile component‚ while fractional distillation was done to distinguish an ethyl acetate/n-butyl acetate mixture‚ which has boiling points of 77º and 125 º‚ respectively. Results and Discussion As previously stated the standard boiling point for ethyl acetate is 77º. The data obtained resulted with the experimental boiling point being approximately
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| Polysar Limited | Memo | | For the first nine months in 1986‚ NASA rubber division generated a sale of $66 million which exceeded the budgeted sales by $4.7 million. At the same time‚ NASA created a positive gross margin of 40 million which exceeded the budgeted gross margin by $3.7 million. However‚ they experienced a net loss of .876 million‚ which was $2.8 million lower than the budgeted amount. | Actual | Budget | Difference | | ($ ’000) | ($ ’000) | ($ ’000) | Sales |
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net sales revenue exceeds the budget by yielding a favorable net sales variance of 4‚579‚000. NASA also generates a positive gross margin by accurately and reasonably budget the variable costs. NASA calculates standard variable cost per tonne of butyl by multiplying a standard utilization factor by a standard price established for each unit of input. Since feedstock prices varied with worldwide market conditions and represented the largest component of costs‚ it is impossible to establish standard
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