Grignard reaction

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    Grignard Reaction Lab

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    This lab was a two week long lab called the Grignard Reaction lab. The purpose of this lab was to perform the Grignard reaction and to obtain the final product triphenylmethanol from a halide, phenylmagnesium bromide and the starting material, methyl benzoate along with the Grignard reagent. Bromobenzene, magnesium turnings, and anhydrous ether were needed to form the Grignard reagent. To synthesize the reagent, react the reagent with methyl benzoate to form a tertiary alcohol. The objective of the Grignard Reaction lab was to obtain the actual yield of the product, to calculate theoretical and percent yield of the product, and to record the melting point of the product. Background The Grignard reaction is a reaction that form alcohols. The Grignard reagent is essential…

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    Grignard Reaction Lab

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    to prepare the Grignard reagent from aryl or alkyl halides and demonstrate the principles of organometallic chemistry. The Grignard reagent was prepared via a radical mechanism. The Grignard reagent was then used to prepare a carboxylic acid from carbon dioxide, demonstrating its ability to create carbon-carbon bonds by acting as a strong nucleophile. As the R group of the Grignard reagent was unknown, molecular weight and melting point were then used to identify the resulting carboxylic acid.…

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    Abstract: The Grignard reaction was successfully accomplished. An amount of 1.20 ml of 2-methyl-2-pentanol was collected, and 9.60% yield was calculated based on the theoretical yield. Despite the low amount of 2-methyl-2-pentanol, its identity was confirmed by comparing the experimental refractive index and infrared spectrum to the literature refractive index and infrared spectrum of 2-methyl-2-pentanol. Statement and purpose The purpose of this experiment is to synthesize a specific alcohol…

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    unsatisfactory, even though the results sustain a general trend throughout the course of the experiment, the results were not expected. At the beginning of the experiment all reagents produced satisfactory results, the reactant 2-bromopropane was determined to be the limiting reagent for the Grignard formation and the Isopropyl Magnesium Bromide was correctly formed. However, random errors occurred at the nucleophilic addition step. At this period, it was observed there was not condensation…

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    It’s not easy telling someone that their loved one has had a severe accident, with a high risk of limb amputation. When it involves people you already love, it weighs even more on your heart. Nevertheless, Dave and his family needed help, and my work became imperative. This moment marked the point in my healthcare career where I found the ability to form a tangible connection with family members, and implicit trust. I found this moment profound in that it both empowered me as I now knew how I…

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    A possible chemical reason that this experiment yielded less than 100% triphenylcarbinol was caused by the Grignard reagent reacting with atmospheric water or oxygen instead of reacting with benzophenone due to the highly reactive nature of the Grignard reagent and a constant presence of humidity and moisture inside the laboratory. Although extra precautions were taken to dry to glassware and a CaCl2 drying tube was used, there was an unavoidable exposure of the Grignard reagent to atmospheric…

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    who were out on convoys or patrolling. I remember the day clearly when my Sargent died. There had been a patrol out doing a routine sweep of our area and he stepped on an IED, which basically turned him into pink mist. There was no body to recover. I remember standing at the left corner security post when the blast went off. The blast was large enough to kill him and open cause minor injuries to the other men around him. There was this sense of panic since there was nothing I could do but watch…

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    There are several different reactions that can be utilized in order to end with a product that includes the synthesis of carbon-carbon bonds, however for this experiment the reaction that was utilized is aldol condensation. An aldol condensation is when an enolizable aldehyde or ketone undergoes a reaction, in the presence of a base or acid, and gives a beta unsaturated ketone or aldehyde (Utah Valley University, 2009). This type of reaction can also add carbonyls to a compound, using similar…

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    substituted pyridines following Biao et. al Specifically my task was to reproduce the synthesis of 2 starting from the same materials as in Biao et al. , following the same reactions, to validate the yields reported. The overall transformation (Figure 2) included a Grignard reaction, oxidative cleavage, oxidation, the pyrolysis cyclization and a chlorination. Figure 2 Overall Reaction Scheme following Biao et. all Reagents & Conditions: A) Mg, THF, 50°c 3h. Then NH4Cl. B) O3, 1:1 CH2Cl2:…

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    this would be considered as prohibitively expensive in some cases. Common practice nowadays to synthesis and evaluate all achievable isomers of a new product before it is put into use. The reactions are either highly enantioselective or enantiospecific. Resolution was used to access enantiopure molecules before the development of efficient methods. There are a number of methods of asymmetric synthesis, the first being first generation or substrate controlled methods. In these, the reaction is…

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