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Grignard Synthesis of Benzoic Acid

Grignard reaction synthesis of benzoic acid lab report

This lab is centered around the addition of carbons to a compound, an extremely useful ability in chemistry. To add carbons to a molecule with a carbonyl carbon, it is possible to use an organometallic, in this case a Grignard reagent. The benzophenone was dissolved by adding a clamshell stir bar and placing the round bottom flask over a stirring hot plate (no heating). After it was dissolved, a Claisen adapter and a condenser column were added. The benzoic acid synthesis and purification went very smoothly. The recovered crystals were shard-like and close to pure white. The melt temp recorded for the sample was 122.45 C, nearly exact to the table value of 122.4 C. Acid is only used after the synthesis of desired compounds has been completed. METHODS Synthesis of Triphenylmethanol 2.021g of benzophenone and 15mL of anhydrous diethyl ether were added into a 100mL round bottom flask. Next, benzoic acid will be synthesized from carbon dioxide and phenylmagnesium bromide (the same organometallic used in the first reaction). Both substances will also be purified and analyzed. An important note to these reactions is that Grignard reagents use a very basic carbanion intermediate and therefore no protic acid should be allowed to permeate the reaction it will destroy the reagent.

The product was placed in an oven overnight for later analysis. Synthesis of Benzoic Acid 5-10g of dry ice was added to a 250mL beaker, followed by 15mL of the Grignard reagent (phenylmagnesium bromide).

A second NaOH wash/extraction was performed to ensure ionization and collection of all benzoic acid. To isolate benzoic acid, HCl was added until the pH fell to one. The acidic mixture was cooled and then the crystals collected via vacuum filtration. A Separatory funnel containing 15mL of phenylmagnesium bromide was placed into the side of arm of the Claisen adapter and the Grignard reagent was added drop-wise while stirring. The solution was refluxed gently for twenty minutes while solid accumulated in the round bottom flask. When the reflux was finished, the contents of the flask were transferred to a 125mL Erlenmeyer flask. The flask was stored overnight to allow for evaporation of diethyl ether and tetrahydrofuran. The second reaction was the synthesis of benzoic acid from phenylmagnesium bromide using dry ice and a variety of washes. The benzoic acid reaction was straightforward and a 54.4 yield was recovered. During the addition of sodium sulfate, the crystals clumped to the bottom and refused to form a free flowing mixture. Later when the ligroin was added, the white particles appeared nearly immediately and there was no other change to the solution through the boiling. They can also be used to attach a carbon containing functional group for example the formation of benzoic acid using a benzene organometallic and attachment of a carboxylic group to it. The beaker was left alone to sublime and when finished had formed a viscous, brownish, glassy mass. 10mL of 6.0M HCl was added slowly while stirring, until the pH fell to 1. The benzoic acid synthesis and purification went very smoothly. The recovered crystals were shard-like and close to pure white. The melt temp recorded for the sample was 122.45 C, nearly exact to the table value of 122.4 C. The alcohols produced from aldehydes and ketones are also important because they can be easily converted into other compounds this makes them extremely useful in the laboratory. The first reaction is to synthesize triphenylmethanol from benzophenone and an organometallic. The product was placed in an oven overnight for later analysis. Synthesis of Benzoic Acid 5-10g of dry ice was added to a 250mL beaker, followed by 15mL of the Grignard reagent (phenylmagnesium bromide). In this part of the course, we will learn how the microscopic composition and structure of solid materials determines if they are strong, brittle, crystalline, amorphous, ductile, electrically conducting, insulating, semiconducting, opaque, or transparent. Enter all schools even if your credits were transferred, no credits were earned, or you withdrew from the class/school. Transcripts: You need a copy of your official transcript from each U.S., U.S. 2. How significant are the topics of cool hunting and trend spotting in the world of auto manufacturing? It is fundamental to be innovative and trend spotting in our industry. At Hyundai, we believe it is good to be different. Albany, New York Brenda J. O'Connor-Marello, CSR - Realtime Reporter. M-F Reporting, Inc. Office: Fax: Serving Albany and surrounding area to an approximate 75 mile radius. - New York Only - e-mail: website: m Rates reduced for ongoing case coverage. Это красивое женское имя. Собака с этим именем может быть большой и маленькой, она всегда успокаивает своих владельцев, добрая, ласковая, нрав спокойный, сдержанная. Алиса рожает по нескольку щенков, нежно их любит, учит и трудно с ними расстается. After 15 minutes, the sodium sulfate solids were removed via gravity filtration of large folded filter paper. 15mL of ligroin was added, after which large particles of a white precipitate formed.

They can also be used to attach a carbon containing functional group for example the formation of benzoic acid using a benzene organometallic and attachment of a carboxylic group to it.

Organic synthesis benzoic acid via a grignard
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