Bromination of trans- Stilbene to form 1‚2- Dibromo- 1‚2-diphenylethane Abstract 1‚2-dibromo-1‚2-diphenylethane was produced by the bromination of trans-stilbene through the addition of hydrobromic acid (HBr) and hydrogen peroxide (H2O2). This experiment was a greener bromination of stilbene because bromine was generated in situ and ethanol was used as the solvent. The melting point (243.30°C)‚ mass (.427g)‚ and percent yield (45.54) of the crystals were recorded. The FTIR
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1 CHM 1321 Second Midterm Apr 1 – 2011 (Prof. S. Gambarotta) Your Name: ___________________ Student #: ______________ Exercise key Exercise key 1
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stir the solution in the conical vial while it is in the reflux condenser. The vigorous stirring is to ensure the interaction between the 1-hexene‚ the HBr‚ and the tetrabutylammonium bromide. Tetrabutylammonium bromide is used as a phase catalyst (one that helps the reactants move into the same phase phase) to help proceed the reaction faster since HBr and 1-hexene are the aqueous and organic phases respectively. The use of a reflux condenser is also crucial for the success of the reaction. The reflux
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few extract strength and wisdom from most trying experiences. They’re the ones we call leader”-Warren G Bennis and Robert J Thomas: HBR at large – Crucibles of Leadership. A crucible has a religious meaning to it; it basically means a test or an event where there is a final decision or verdict. For example‚ Sidney Harman (Warren G Bennis and Robert J Thomas: HBR at large – Crucibles of Leadership)‚ he is the co founder of Harman Kardon and the president of an experimental college. He encountered
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INTRODUCTION Introduction to the Company The Hirdaramani legacy began in 1890 when Parmanand Hirdaramani set up the first Hirdaramani retail store in Fort‚ Colombo. He made a name for himself in the early 1900s by introducing the concept of same-day tailoring to passengers of cruise liners that docked at the Colombo Harbour. The innovative Hirdaramani spirit took flight‚ emerging from these small beginnings to steadily become the one-stop manufacturing hub and diversified group that it is today.
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The Medici Bank‚ Organization and Management Insights (interrelated) * The dependency of the organization and structure of a firm on the nature of its business. * Trading and Banking : “the foundation of the firm’s business rests on trade in which most of the capital is employed” * Merchant bankers (whose business interests were international in scope) Vs Local bankers * Global nature and size of business; number of banks around the world * Centralized vs Decentralized
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Introduction.- Majority of the time‚ to prepare alkyl halides is via the nucleophilic substitution reactions of alcohols. SN2 reaction is the type of reaction used in this lab experiment. Our objective was to see how a primary alkyl halide reacted with an alcohol. We did a conversion of n-butanol to 1-bromobutane. Br- ions is the nucleophile for this reaction which is generated from an aqueous solution of NaBr. The catalyst that converted the OH functional group of butanol to a better leaving group
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The purpose of this experiment was to successfully produce stilbene dibromide by using a more sustainable approach‚ which would prevent less environmental issues. This was done by brominating trans-stilbene and then using the elimination process on the dibrominated product. This process is considered “greener” compared to the original bromination procedures. In order to create the alkyl halides‚ which are able to undergo chemical transformations more readily than the carbon-carbon double bond‚ onto
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Behavior: A Strategic Approach. Hoboken‚ NJ: John Wiley. Second Edition. Coursepacket: Available athttps://cb.hbsp.harvard.edu/cbmp/access/23589050 The Harvard Business Review articles (HBR) are not included in the coursepacket because you can access them for free. You are responsible for finding the HBR articles through the library or the EBSCO host database. **Additional reading assignments are posted on Blackboard under “Course Materials”. OVERVIEW This is an introductory‚ survey
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The HBR article‚ “Rethinking Political Correctness” by Ely‚ R.‚ Meyerson‚ D.‚ & Davidson M.‚ explores what can be the downside of increased sensitivity to race‚ religion‚ or gender in the workplace. In the class text‚ Bell spells out that “Overt demonstrations of intentional discrimination are considerably less likely in the twenty-first century than they have been in the past” (2012 p. 53). While this should be considered meaningful progress by our society likely helped by laws and regulations‚
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