During a chem lab (Preparing benzoic acid from a Grignard reagent): If you were to take...
During a chem lab (Preparing benzoic acid from a Grignard reagent): If you were to take a TLC of your Grignard solution before you add it to the dry ice, what would your TLC look like?
Homework Answers
Grignard reagent is destroyed in presence of H2O as per the given reaction:--
Addition of dry ice makes sure
that there is no contamination of water in Grignard reagent &
also it prevents the contact of moisture with Grignard reagent.
If TLC is taken without addition of dry ice, grignard reagent will destroy by get into contact with atmospheric moisture, So two spots will be shown on TLC corresponding to grignard reagent, one of the R-H and other of OH-Mg-X
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During a chem lab (Preparing benzoic acid from a Grignard
reagent): If you were to take...
If you were to take a TLC of your Grignard solution before you add it to...
If you were to take a TLC of your Grignard solution before you add it to the dry ice, what would your TLC look like?
Preparation of Benzoic Acid using a Grignard Reagent URGENT 1. During your Grignard formation, a small...
Preparation of Benzoic Acid using a Grignard Reagent URGENT 1. During your Grignard formation, a small amount of benzene is formed. Provide a brief explanation and mechanism to explain this observation. 2. During your Grignard formation, a small amount of biphenyl is formed. Provide a brief explanation and mechanism to explain this observation. 3. What mass of water would be required to destroy the phenylmagnesium bromide that you prepared in this experiment? What volume does this represent? 4. Why is...
Outline a separation scheme for isolating benzoic acid from a reaction mixture if mixing a Grignard reagent phenylmagnes...
Outline a separation scheme for isolating benzoic acid from a reaction mixture if mixing a Grignard reagent phenylmagnesium bromide with dry ice (CO2) in ether.
Please only answer 3 P Grignard 1. During the formation of the Grignard reagent, the solution...
Please only answer 3
P
Grignard 1. During the formation of the Grignard reagent, the solution can boil without addition of external heat. Explain 2. Explain why acetone and water should be excluded from the reaction vessel during the formation of the Grignard reagent. 3. At what stage of the procedure can water be allowed to come into contact with the reaction solution? 4. Why is the dry ice crushed before use and why should you wait to crush the...
What would be the theoretical yield of this Grignard reaction with the product being benzoic acid?...
What would be the theoretical yield of this Grignard reaction with the product being benzoic acid? 0.70 mL of bromobenzene 0.15 g Mg 5g dry ice crude benzoic acid recovered: 0.08 g
Grignard reagent THE GRIGNARD REAGENT-PREPARATION AND REACTION In this experiment, you will prepa...
i need help with the postlab questions please
Grignard reagent THE GRIGNARD REAGENT-PREPARATION AND REACTION In this experiment, you will prepare a Grignard reagent, phenyl magnesium bromide, from bromobenzene and magnesium metal. The Grignard reagent will then react with methyl benzoate to form triphenylmethanol. Introduction Grignard reagents, such as organomagnesium halides, were discovered in 1910 by French chemist Victor Grignard. The Grignard reaction is one of the most general methods for carbon- carbon bond formation in all of organic chemistry....
Experiment 2: Grignard synthesis of benzoic acid . Complete reaction, and provide the reaction mechanism for...
Experiment 2: Grignard synthesis of benzoic acid . Complete reaction, and provide the reaction mechanism for all chemistry in this lab (forming the Grignard reagent, reaction with the CO2 electrophile, and acidification). . What are the side products and salts formed in this reaction? How are they removed from the purified product? . Why do we take precautions to eliminate water from the reaction? Be specific about what would happen if we did not do so. . Why is the...
In a lab, we are to draw and carry out a purification scheme for the carboxylic...
In a lab, we are to draw and carry out a purification scheme for
the carboxylic acid product of a Grignard reaction we've performed,
in order to then identify the starting material we used using the
melting point of our carboxylic acid product.
A flowchart of our purification scheme is required, indicating
where all molecules (in their current ionization states) are at
each step, ending with the dry carboxylic acid at the end.
Once the dry ice has been thoroughly...
Draw the curved arrows showing how a Grignard reagent and benzoic acid would react. For the...
Draw the curved arrows showing how a Grignard reagent and benzoic acid would react. For the sake of simplicity, the MgCI counterion has been omitted from the drawing. For the reaction below, draw the major organic product:
Grignard Reaction with a Ketone: Triphenylmethanol Introduction: The purpose of this lab is to prepare phenylmagnesium...
Grignard Reaction with a Ketone: Triphenylmethanol Introduction: The purpose of this lab is to prepare phenylmagnesium bromide, a Grignard reagent, and react it with benzophenone to give triphenylmethanol. Grignard reagents are very reactive and must be synthesized in an environment free of water or any other source of potential proton donor. Once made, the Grignard reagent will do a nucleophilic attack on the carbonyl carbon of the ketone, benzophenone. The result is an alkoxide that is then protonated to give...
Please only answer 3
P
Grignard 1. During the formation of the Grignard reagent, the solution can boil without addition of external heat. Explain 2. Explain why acetone and water should be excluded from the reaction vessel during the formation of the Grignard reagent. 3. At what stage of the procedure can water be allowed to come into contact with the reaction solution? 4. Why is the dry ice crushed before use and why should you wait to crush the...
i need help with the postlab questions please
Grignard reagent THE GRIGNARD REAGENT-PREPARATION AND REACTION In this experiment, you will prepare a Grignard reagent, phenyl magnesium bromide, from bromobenzene and magnesium metal. The Grignard reagent will then react with methyl benzoate to form triphenylmethanol. Introduction Grignard reagents, such as organomagnesium halides, were discovered in 1910 by French chemist Victor Grignard. The Grignard reaction is one of the most general methods for carbon- carbon bond formation in all of organic chemistry....
Experiment 2: Grignard synthesis of benzoic acid . Complete reaction, and provide the reaction mechanism for all chemistry in this lab (forming the Grignard reagent, reaction with the CO2 electrophile, and acidification). . What are the side products and salts formed in this reaction? How are they removed from the purified product? . Why do we take precautions to eliminate water from the reaction? Be specific about what would happen if we did not do so. . Why is the...
In a lab, we are to draw and carry out a purification scheme for
the carboxylic acid product of a Grignard reaction we've performed,
in order to then identify the starting material we used using the
melting point of our carboxylic acid product.
A flowchart of our purification scheme is required, indicating
where all molecules (in their current ionization states) are at
each step, ending with the dry carboxylic acid at the end.
Once the dry ice has been thoroughly...
Draw the curved arrows showing how a Grignard reagent and benzoic acid would react. For the sake of simplicity, the MgCI counterion has been omitted from the drawing. For the reaction below, draw the major organic product:
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