Lab: Grignard Reaction - Triphenylmethanol Why was the petroleum ether used to remove the biphenyl from...
Lab: Grignard Reaction - Triphenylmethanol
Why was the petroleum ether used to remove the biphenyl from the product? Apparently, it does not dissolve triphenylmethanol. (Explain in 3-4 Sentences)
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Lab: Grignard Reaction - Triphenylmethanol
Why was the petroleum ether used to remove the biphenyl from...
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...
In Grignard reaction: 1) The main by-product of the reaction to prepare triphenylmethanol is biphenyl. Draw...
In Grignard reaction:
1) The main by-product of the reaction to
prepare triphenylmethanol is biphenyl. Draw the structure of
biphenyl and write a reaction to explain its formation.
2) Another typical
by-product of any reaction using phenylmagnesium bromide is
benzene. Write a reaction to explain its formation.
1. a) Why does biphenyl have a higher Rf value than either benzophenone or triphenylmethanol? Exp...
1. a) Why does biphenyl have a higher Rf value than either benzophenone or triphenylmethanol? Explain based on the structures and their effect on mobility in the TLC process. b) Which compound, benzophenone or triphenylmethanol has a higher Rf value? Explain, based on their structures, how you can predict this. c) You developed your TLC using a 10% mixture of diethyl ether in petroleum ether. Petroleum ether is a mixture of non-polar alkanes, so this TLC solvent is composed of...
What is the theoretical yield (in grams) and percent yield of your triphenylmethanol product in this...
What is the theoretical yield (in grams) and percent yield of your
triphenylmethanol product in this experiment? (Weight of
triphenylmethanol: 0.060g)
BACKGROUND AND THEORY The Grignard reaction was one of the first organometallic reactions discovered and is still one of the most useful synthetically. By reacting an organohalide (usually a bromide) with magnesium in ethereal solvent, carbon becomes a nucleophile. Grignard reagents are the starting points for the syntheses of many alkanes, primary, secondary, and tertiary alcohols, alkenes, and carboxylic...
I did Grignard lab in class last week and I took a tlc for it with...
I did Grignard lab in class last week and I took a tlc for it
with the recrystallized product of Triphenylmethanol, the petroleum
ether extract and the crude product. I am trying to understand what
I am supposed to understand from this TLC. below are pictures of my
lab procedures and my TLC plate.
38r H30 Tate of scal contet dl Toxis キlammak lo 104 Flam
a. How does diethyl ether stabilize the Grignard reaction? b. Could dimethylether be used instead? Why...
a. How does diethyl ether stabilize the Grignard reaction? b. Could dimethylether be used instead? Why or why not?
Please answer 2 through 5 2) Fill in the reaction table below. Make sure you correctly...
Please answer 2 through 5
2) Fill in the reaction table below. Make sure you correctly calculate the molar amounts (mol.-eq.) of your reactive materials name ormulamol.-eq mo ensi romobenzend C6H5Br | magnesium Mg C13H10 70 0.15 g 1.09 g HCI (6M) HC -6.0 m product H 3) Calculate the theoretical yield of your product, i.e. the mass you would expect to recover (assuming 100% conversion to product). Show your work. 4)Grignard reactions are particularly sensitive to water, and are...
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....
Grignard reagent THE GRIGNARD REAGENT-PREPARATION AND REACTION In this experiment, you will prepa...
i need help with the prelab 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....
Preparation of Triphenylmethanol Using the Grignard Reaction. RH ROOH CO TO R-R MgBr 1.ether 2.11-SO/10 Icther...
Preparation of Triphenylmethanol Using the Grignard Reaction.
RH ROOH CO TO R-R MgBr 1.ether 2.11-SO/10 Icther Grignard reagents are highly reactive and can undergo undesirable RCOH TH₂O side reactions if impurities such as water, carbon dioxide, or oxygen are present. If the organohalogen is added to the R-Mg-X magnesium too quickly, undesired coupling reactions can also occur. In this experiment, you will use 0.015 moles of either benzophenone or ethyl benzoate as the recipient of the phenylmagnesium bromide and this...
In Grignard reaction:
1) The main by-product of the reaction to
prepare triphenylmethanol is biphenyl. Draw the structure of
biphenyl and write a reaction to explain its formation.
2) Another typical
by-product of any reaction using phenylmagnesium bromide is
benzene. Write a reaction to explain its formation.
What is the theoretical yield (in grams) and percent yield of your
triphenylmethanol product in this experiment? (Weight of
triphenylmethanol: 0.060g)
BACKGROUND AND THEORY The Grignard reaction was one of the first organometallic reactions discovered and is still one of the most useful synthetically. By reacting an organohalide (usually a bromide) with magnesium in ethereal solvent, carbon becomes a nucleophile. Grignard reagents are the starting points for the syntheses of many alkanes, primary, secondary, and tertiary alcohols, alkenes, and carboxylic...
I did Grignard lab in class last week and I took a tlc for it
with the recrystallized product of Triphenylmethanol, the petroleum
ether extract and the crude product. I am trying to understand what
I am supposed to understand from this TLC. below are pictures of my
lab procedures and my TLC plate.
38r H30 Tate of scal contet dl Toxis キlammak lo 104 Flam
Please answer 2 through 5
2) Fill in the reaction table below. Make sure you correctly calculate the molar amounts (mol.-eq.) of your reactive materials name ormulamol.-eq mo ensi romobenzend C6H5Br | magnesium Mg C13H10 70 0.15 g 1.09 g HCI (6M) HC -6.0 m product H 3) Calculate the theoretical yield of your product, i.e. the mass you would expect to recover (assuming 100% conversion to product). Show your work. 4)Grignard reactions are particularly sensitive to water, and are...
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....
i need help with the prelab 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....
Preparation of Triphenylmethanol Using the Grignard Reaction.
RH ROOH CO TO R-R MgBr 1.ether 2.11-SO/10 Icther Grignard reagents are highly reactive and can undergo undesirable RCOH TH₂O side reactions if impurities such as water, carbon dioxide, or oxygen are present. If the organohalogen is added to the R-Mg-X magnesium too quickly, undesired coupling reactions can also occur. In this experiment, you will use 0.015 moles of either benzophenone or ethyl benzoate as the recipient of the phenylmagnesium bromide and this...
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