Tetraphenylcyclopentadienone lab report. Synthesis of Hexaphenylbenzene by Kaelyn Garner on Prezi 2019-03-04

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Synthesis of Hexaphenylbenzene by Kaelyn Garner on Prezi

tetraphenylcyclopentadienone lab report

. The concentration of reactants and temperatures of solutions are critical to obtaining a good yield so procedures must be followed carefully. Benzaldehyde is easily oxidized to benzoic acid which can impede the desired reaction so freshly distilled benzaldehyde is used. This reaction, which requires a catalyst, if often performed with cyanide ion. An alternativethird step is the reduction of benzil to dihydrobenzoin with a reducing agent, sodium borohydride. Instead of running this reaction at elevated temperatures for a few hours, we will allow the reaction to proceed closer to room temperature for 24 hours or more.

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Lab Report

tetraphenylcyclopentadienone lab report

Neither you, nor the coeditors you shared it with will be able to recover it again. The third step is a condensation reaction of benzil with dibenzyl ketone 1,3-diphenyl-2-propanone to produce tetraphenylcyclopentadienone. In the second step, the benzoin is oxidized to benzil through the use of an oxidizing agent. We will use thiamine as a catalyst. Product did not dissolve in anything. Diphenylacetylene had many impurities according to melting point.

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Synthesis of Hexaphenylbenzene by Kaelyn Garner on Prezi

tetraphenylcyclopentadienone lab report

The first step is the synthesis of benzoin, this reaction is a the conversion of two molecules of an aldehyde to an alpha-hydroxy ketone. An additional fourth step is possible converting the tetraphenylcyclopentadienone to a substituted naphthalene via a Diels-Alder reaction followed bydecarbonylation using microwaves as the energy source. Melting Point: 455 degrees C Percent Yield: 57. Some of the base reacts with the thiamine hydrochloride to produce thiamine which is the active catalyst. Repeated synthesis twice to obtain a higher yield. Melting Point: 220 degrees C Percent Yield: 4.

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Lab Report

tetraphenylcyclopentadienone lab report

Lab Report Discussion : When synthesizing complex organic molecules, it is common to have at least a dozen individual transformations whereby the product of one reaction is then used as the starting material for the next reaction. Too little water prevents the thiamine hydrochloride from dissolving. The sequence will attempt to first the conversion of benzaldehyde to benzoin using the vitamin, thiamin, as a catalyst. A multistep synthesis starts with inexpensive, readily available benzaldehyde. It is heat-sensitive and may decompose if heated too vigorously. Too much water will force benzaldehyde out of solution preventing an efficient reaction. .

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tetraphenylcyclopentadienone lab report

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Synthesis of Hexaphenylbenzene by Kaelyn Garner on Prezi

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Synthesis of Hexaphenylbenzene by Kaelyn Garner on Prezi

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tetraphenylcyclopentadienone lab report

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Synthesis of Hexaphenylbenzene by Kaelyn Garner on Prezi

tetraphenylcyclopentadienone lab report

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