1. Upon mixing of 2-methylbutane-2-ol and aqueous HCl a homogeneous mixture is obtained (one phase). After...
1. Upon mixing of 2-methylbutane-2-ol and aqueous HCl a homogeneous mixture is obtained (one phase). After stirring for 30 min two phases have appeared – how can you explain that?
In the procedure, the organic phase was washed with
aqueous
Na2CO3
– what does that accomplish?
Homework Answers
1)
Reaction between 2-methylbutane-2-ol and HCl will produce
2-chloro-2-methylbutane and water which are insoluble with each
other and we can see two layers.
2) Organic phase by washing with Na2CO3 excess of HCl will get quenched and we will get 2-chloro-2-methylbutane.
Add Answer to:
1. Upon mixing of 2-methylbutane-2-ol and aqueous HCl a
homogeneous mixture is obtained (one phase). After...
Would like help with the second question in the attached photo. Thank you! Upon mixing of...
Would like help with the second question in
the attached photo. Thank you!
Upon mixing of 2-methylbutane-2-ol and aqueous HCl a homogenous mixture is obtained (one phase). After stirring for 30 min two phases have appeared - how can you explain that? This question has been answered correctly. In the procedure, the organic phase was washed with aqueous Na2CO3 - what does that accomplish? In doubt about this?????
Just Answer Question 5 Synthesis of 2-chloro-2-methylbutane (literature version) Concentrated aqueous hydrochloric acid (HCI, 3.3 equivalents)...
Just Answer Question 5
Synthesis of 2-chloro-2-methylbutane (literature version) Concentrated aqueous hydrochloric acid (HCI, 3.3 equivalents) was slowly added to 2-methyl-2-butanol (1.0 equivalents) in a 100 mL round bottom flask with stirring. The reaction was stirred for 15 minutes at room temperature. Upon completion, the reaction mixture was transferred to a 60 mL separatory funnel and the aqueous layer was removed. The organic layer (i.e. the product) was successively washed with: (1) saturated aqueous NaCl (brine), (2) saturated aqueous NaHCO,...
a) Which products (shown above) from reaction 3 can react with HCl in an acid-base reaction?...
a) Which products (shown above) from reaction 3 can react with
HCl in an acid-base reaction? Show the mechanism for this acid-base
reaction and give the structures that would result from the
protonation of these products. Which phase (organic or aqueous)
would these protonated products be soluble in?
b) Which phase (organic or aqueous) would the
p-methylacetanilide be found in?
In step 5 of reaction 3, the reaction mixture containing the products shown below in ethyl acetate is extracted twice...
a) Which products (shown above) from reaction 3 can react with HCl in an acid-base reaction?...
a) Which products (shown above) from reaction 3 can react with
HCl in an acid-base reaction? Show the mechanism for this acid-base
reaction and give the structures that would result from the
protonation of these products. Which phase (organic or aqueous)
would these protonated products be soluble in?
b) Which phase (organic or aqueous) would the
p-methylacetanilide be found in?
c) Why did we have to use hot ethanol for the
recrystallization?
d) Why did we have to cool the...
10. Using your answer to 6e: 6e: What percent of the mixture obtained in reaction 1...
10. Using your answer to 6e: 6e: What percent of the
mixture obtained in reaction 1 is the para isomer? para isomer :
37.9%
a) How many millimoles of the para product were
present in the isomeric mixture added in the first step of reaction
2? Please show your work.
b) In order to selectively acetylate the para isomer, equimolar
amounts of acetic anhydride and the para isomer must be present.
Using the millimoles you obtained as your answer to...
reaction mixture for 30 min, stirring the mixture rapidly during the process. The start of the...
reaction mixture for 30 min, stirring the mixture rapidly during the process. The start of the reaction is indicated by a slight turbidity of the solution. The mixture may become more turbid as the reaction proceeds and eventually may turn a pale yellow. Allow the reaction mixture to cool to room temperature after the reflux period. Reaction of the Grignard reagent with CO2 :O MgX 1) CO2 (s) 2) HCI OH MgX) magnesium carboxylate complex Grignard reagent substituted benzoic acid...
13. In step 5 of reaction 3, the reaction mixture containing the products shown below in...
13. In step 5 of reaction 3, the reaction mixture containing the products shown below in ethyl acetate is extracted twice with HCI. NH2 NH2 HN o-methylaniline m-methylaniline p-methylacetanilide a) Which products (shown above) from reaction 3 can react with HCl in an acid-base reaction? Show the mechanism for this acid-base reaction and give the structures that would result from the protonation of these products. Which phase (organic or aqueous) would these protonated products be soluble in? (6 points) b)...
For the portion of the procedure shown below, create a flow chart for the acid-base extraction...
For the portion of the procedure shown below, create a
flow chart for the acid-base extraction at the end of the Grignard
Reaction. Start your flow chart with the crude reaction (see below)
mixture before addition of HCl and continue it until the product is
recovered. Depict the desired organic product, in its correct form
at each step of the procedure.
Crude reaction mixture procedure for reference: To
the flask add Mg turnings (120 mg, 4.94 mmol) to the flask...
When setting up the reflux condenser, does it matter if the water flows into the bottom...
When setting up the reflux condenser, does it matter if the
water flows into the bottom or the top of the condenser? If so,
does it have to flow into the bottom or the top, and why? If not,
why does it not matter?
Reaction 2: Reduction NO2 NH4HCO2 NH2 + NO2 Pd/C NO2 NH2 NH2 m-methylaniline p-methylaniline 0-methylaniline ortho meta para Procedure for Reaction 2: 1) The mixture of ortho, meta, and para isomers obtained from reaction 1 (2.4...
a) After the reaction is completed, the reaction mixture is transfered to a separatory funnel. The layers are separated...
a) After the reaction is completed, the reaction mixture is
transfered to a separatory funnel. The layers are separated and the
organic layer is washed with each of the following: an equal amount
of saturand NaCl, satured NaHCO3, deionized H2O, and again with
saturated NaCl. This is an example of a "basic" work-up. Illustrate
what is being neutralized in this work up using a balanced
equation. (2 Marks)
b) The base used is NaHCO3. This base can be dangerous in...
Would like help with the second question in
the attached photo. Thank you!
Upon mixing of 2-methylbutane-2-ol and aqueous HCl a homogenous mixture is obtained (one phase). After stirring for 30 min two phases have appeared - how can you explain that? This question has been answered correctly. In the procedure, the organic phase was washed with aqueous Na2CO3 - what does that accomplish? In doubt about this?????
Just Answer Question 5
Synthesis of 2-chloro-2-methylbutane (literature version) Concentrated aqueous hydrochloric acid (HCI, 3.3 equivalents) was slowly added to 2-methyl-2-butanol (1.0 equivalents) in a 100 mL round bottom flask with stirring. The reaction was stirred for 15 minutes at room temperature. Upon completion, the reaction mixture was transferred to a 60 mL separatory funnel and the aqueous layer was removed. The organic layer (i.e. the product) was successively washed with: (1) saturated aqueous NaCl (brine), (2) saturated aqueous NaHCO,...
a) Which products (shown above) from reaction 3 can react with
HCl in an acid-base reaction? Show the mechanism for this acid-base
reaction and give the structures that would result from the
protonation of these products. Which phase (organic or aqueous)
would these protonated products be soluble in?
b) Which phase (organic or aqueous) would the
p-methylacetanilide be found in?
In step 5 of reaction 3, the reaction mixture containing the products shown below in ethyl acetate is extracted twice...
a) Which products (shown above) from reaction 3 can react with
HCl in an acid-base reaction? Show the mechanism for this acid-base
reaction and give the structures that would result from the
protonation of these products. Which phase (organic or aqueous)
would these protonated products be soluble in?
b) Which phase (organic or aqueous) would the
p-methylacetanilide be found in?
c) Why did we have to use hot ethanol for the
recrystallization?
d) Why did we have to cool the...
10. Using your answer to 6e: 6e: What percent of the
mixture obtained in reaction 1 is the para isomer? para isomer :
37.9%
a) How many millimoles of the para product were
present in the isomeric mixture added in the first step of reaction
2? Please show your work.
b) In order to selectively acetylate the para isomer, equimolar
amounts of acetic anhydride and the para isomer must be present.
Using the millimoles you obtained as your answer to...
reaction mixture for 30 min, stirring the mixture rapidly during the process. The start of the reaction is indicated by a slight turbidity of the solution. The mixture may become more turbid as the reaction proceeds and eventually may turn a pale yellow. Allow the reaction mixture to cool to room temperature after the reflux period. Reaction of the Grignard reagent with CO2 :O MgX 1) CO2 (s) 2) HCI OH MgX) magnesium carboxylate complex Grignard reagent substituted benzoic acid...
13. In step 5 of reaction 3, the reaction mixture containing the products shown below in ethyl acetate is extracted twice with HCI. NH2 NH2 HN o-methylaniline m-methylaniline p-methylacetanilide a) Which products (shown above) from reaction 3 can react with HCl in an acid-base reaction? Show the mechanism for this acid-base reaction and give the structures that would result from the protonation of these products. Which phase (organic or aqueous) would these protonated products be soluble in? (6 points) b)...
For the portion of the procedure shown below, create a
flow chart for the acid-base extraction at the end of the Grignard
Reaction. Start your flow chart with the crude reaction (see below)
mixture before addition of HCl and continue it until the product is
recovered. Depict the desired organic product, in its correct form
at each step of the procedure.
Crude reaction mixture procedure for reference: To
the flask add Mg turnings (120 mg, 4.94 mmol) to the flask...
When setting up the reflux condenser, does it matter if the
water flows into the bottom or the top of the condenser? If so,
does it have to flow into the bottom or the top, and why? If not,
why does it not matter?
Reaction 2: Reduction NO2 NH4HCO2 NH2 + NO2 Pd/C NO2 NH2 NH2 m-methylaniline p-methylaniline 0-methylaniline ortho meta para Procedure for Reaction 2: 1) The mixture of ortho, meta, and para isomers obtained from reaction 1 (2.4...
a) After the reaction is completed, the reaction mixture is
transfered to a separatory funnel. The layers are separated and the
organic layer is washed with each of the following: an equal amount
of saturand NaCl, satured NaHCO3, deionized H2O, and again with
saturated NaCl. This is an example of a "basic" work-up. Illustrate
what is being neutralized in this work up using a balanced
equation. (2 Marks)
b) The base used is NaHCO3. This base can be dangerous in...
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