Experiment 5 Full Report / Grignard and Dehydration Reactions Note: The following are merely tips and guidelines to aid you in writing your report

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Experiment 5 Full Report / Grignard and Dehydration Reactions Note: The following are merely tips and guidelines to aid you in writing your report. It is not intended to provide a comprehensive or absolute check-list or outline. 1) Title: A few words describing the experiment or theme. 2) Abstract: As succinctly as possible describe: • Purpose • Method • Results In other words, what you were attempting to do, how you were attempting to do it, and what were the results. Limit the abstract to factual statements and do not include theory or analysis since these topics are covered in detail else ware. The entire abstract should be about 3 to 6 sentences. 3) Purpose and Theory • Restate the purpose and if necessary provide more detail than in the abstract. • Draw all chemical reactions and label reactants and products with actual chemical names if known and/or in general terms (Reactant A,B…and Product C, D etc.) Drawing and labeling the reactions make it easy to refer to and discuss later. • Explain why the Grignard reaction works in terms of mechanism (show), bond polarities, nucleophiles and electrophiles. • Discuss the purpose of the addition of ethanol and aqueous sulfuric acid as well as the extractions during the Grignard procedure. • Explain the dehydration reaction in terms of mechanism (show) and discuss how the two different alkene products can be formed. Is a catalyst used and what is it’s role? • Using an energy diagram explain the concept of kinetic and thermodynamic products. Which product is kinetic and which is thermodynamic in your reaction and why? How should the products ratio change as the reaction progresses to equilibrium? • Why is the reaction sampled 5 times? Why are the samples placed in a mixture of dichloromethane and aqueous sodium bicarbonate? How will the outcome of the experiment be determined? 4) Procedure / Experimental: In a concise manner and in your own words describe chronologically the procedure performed. Simply state what you did and do not explain why things were done. 5) Data and Calculations: This section should include all recorded measurements such as weights, physical constants (melting points, TLC, etc.) as well as any spectroscopic data such as IR. Calculations of percent yields should be shown and limiting reagents and balanced equations should be clearly indicated when relevant. 6) Discussion and Conclusions • Give a conclusion that relates to the original purpose of the experiment. • Interpret your data and explain how the data supports your conclusions and results. Be specific in analyzing the data by assigning the data as described by the professor making definite correlations between the chemical structure and the data. • Analyze the GC results. Which peak in the GC represents which alkene? What makes one alkene the kinetic product and the other the thermodynamic product? Do you believe equilibrium was achieved? • Discuss any problems that you may have encountered and any differences from the expected outcome. • In addition, you may comment on the experiment’s effectiveness in terms of achieving the goal such as answering the question the experiment was intended to answer. Did it produce the product in good yield and high purity. How do you know it was pure? If possible suggest alternative methods or procedures or ways in which the experiment could have been done better or improved etc. 7) References: This section is used to cite any sources you may have used for information. Include enough detail so that the reader can find and check the source.