Objective: The purpose of this experiment was to prepare the Grignard reagent methylmagnesium iodide and react it with benzoin to form the 3o alcohol 1‚2-diphenyl-1‚2-propanediol‚ through an addition reaction pathway. Introduction: Grignard reagents are alkyl or aryl-magnesium halides that act as the nucleophile in Grignard reactions‚ where ketones are reacted with the reagent‚ then treated with acid to produce an alcohol. In the case of this experiment‚ methylmagnesium iodide was created
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Lab #5: Grignard Reaction – Synthesis of Triphenylmethanol John Kang Chem 152L Performed: 7/20/04 Date submitted: ________________ Lab Partners: Sang Lee‚ Vicky Lai TA: John Stanko Abstract: This experiment explored the synthesis of triphenylmethanol through the use of Grignard reagents. The percent yield of the product was 10% on a relatively humid day. The melting point was calculate to be 127.2oC with a literature value of 162oC. An IR spectrum of the product was taken and used
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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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In this experiment‚ the production of a Grignard reagent (phenylmagnesium bromide) was performed from a bromobenzene reactant combined with magnesium and ether. Phenylmagnesium bromide was then transformed into a tertiary alcohol called triphenylmethanol‚ through addition of another compound called benzophenone‚ as well as additional ether. The end product of triphenylmethanol was analyzed via NMR and IR. Figure 1: Preparation of the Grignard agent by combining bromobenzene with magnesium and ether
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Flowchart Process M Salazar University of Phoenix Operations Management OPS 571 Michael Marticek October 08‚ 2012 Flowchart for a Process On a daily basis every individual around the world carries out a process‚ which is a process that is called the daily routine. Weather it is driving to work or preparing your children for school in the morning‚ they all consume a vast amount of time. In this paper‚ a detailed process is recognized‚ and a flowchart has been designed to demonstrate
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Programming Flowcharts Flowcharts A flowchart visually represents and organizes the steps used to write the program—it is a diagram of the “flow” of the process. When programmers write code‚ they need to give the robot instructions that are both sequential and specific. Flowcharts enable programmers to work these steps out before needing to translate their behaviors into code. Reading flowcharts Move from step to step in the chart by following the lines between them. Perform any action listed
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The Grignard Reaction Abstract Through the use of the Grignard reaction‚ a carbon-carbon bond was formed‚ thereby resulting in the formation of triphenylmethanol from phenyl magnesium bromide and benzophenone. A recrystallization was performed to purify the Grignard product by dissolving the product in methanol. From here‚ a melting point range of 147.0 °C to 150.8 °C was obtained. The purified product yielded an IR spectrum with major peaks of 3471.82 cm-1‚ 3060.90 cm-1‚ 1597.38 cm-1‚ and 1489
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to operate computer applications‚ the processing steps that computer systems follow‚ and the logical and physical flows of accounting data through the system. tools used in the analysis‚ design‚ and documentation of systems Narratives‚ flowcharts‚ diagrams‚ and other written materials that explain how a system works. Covers the who‚ what‚ when‚ where‚ why‚ and how of data entry‚ processing‚ storage‚ output and system controls. Understanding System techniques As
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1. Question : Which type of data flow diagram illustrates the internal and external entities who are participating in a given system? Student Answer: Context diagram CORRECT Physical DFD Logical DFD Systems flowchart Points Received: 2 of 2 Comments: Question 2. Question : A data flow diagram represents a physical‚ rather than logical‚ view of an accounting information system. Student Answer: True CORRECT False Points Received: 2 of 2 Comments:
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iv. Based on any recent service encounter for an airline of your choosing‚ draw up a flowchart for passenger pre-flight processing (assume the passenger has already purchased a ticket). Can you think of ways to make the process more efficient? More pleasant for the customer? (25 marks) To make sure that the airline service operation is fail-safed‚ efficient and more pleasant for the customers‚ we can apply poka-yokes‚ which is the procedures that prevent mistakes from becoming defects. Firstly
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