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someone explain to me what exactly is going on in this lab? like
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what would be the percent yield if the final weight of my product is 0.1357g this...
what would be the percent yield if the final weight of my product
is 0.1357g this is a green chemistry wittig reaction to produce
1,4-diphenyl-1,3-butadiene from benzyltriphenylphosphonium chloride
and trans- cinnamaledyde using sodium hydroxide as the base
You will be using a Green Chemistry Wittig reaction (NOT Wittig-Horner Emmons reaction) to produce 1,4-diphenyl-1,3-butadiene starting with benzyltriphenylphosphonium chloride and trans- cinnamaledyde using sodium hydroxide as the base. This reaction is considered a "green" reaction, because an aqueous solution will be used...
What is the percent yield of the lab procedure below? my final weight of the product is 0.0519 g
what is the percent yield of the lab procedure below?
my final weight of the product is 0.0519 g
sure of the proper disposal methodl, properly Check with your laboratory insructor if you are PROCEDURE Be sure to dry the 5-mL reaction vial in the oven for at least twenty minutes. Water is experiment. this Preparation of the Ylide 1. Place 0.480 g of benzyltriphenylphosphonium chloride in a dry, 5-mlL reaction vial containing a magnetic spin vane Add 2 mL...
1.) What side reactions occur during the following steps. 2.) How can the IR spectrum be...
1.)
What side reactions occur during the following steps.
2.) How can the IR spectrum be used to show that there is not
starting material left and the products are ketones?
3.) Describe the major differences and similarities between
the IR spectra of benzoin and benzil. Compare your IR spectrum with
those of benzoin and benzil.
Copper-Catalyzed Oxidation of Benzoin 1. Add a stir bar and 1.5 mL of glacial acetic acid, 0.250 g of NH4NO3 and 0.500 g of...
what is the theoretical yield of anisalacetophenone and dibenzalacetone formed? thank you. The Aldol Condensation Precautions:...
what is the theoretical yield of anisalacetophenone and
dibenzalacetone formed? thank you.
The Aldol Condensation Precautions: Acetone, ethanol and acetophenone are flammable; work in a fume hood. Sodium hydroxide is a strong base and can cause severe skin burns and eye damage. Safety goggles are required. Gloves are recommended. Purpose To carry out two Aldol condensation reactions in which no heat is needed to obtain the condensation product. The two reactions differ in the number of enolizable protons at the...
For the nitration of methyl benzoate: a. Which product did you get? What evidence do you...
For the nitration of methyl benzoate:
a. Which product did you get? What evidence do you have for
this?
b. Was your product pure? What evidence do you have for this?
Explain your evidence.
c. Draw the mechanism for the product you got.
For the bromination of acetanilide:
a. Which product did you get? What evidence do you have for
this?
b. Was your product pure? What evidence do you have for this?
Explain your evidence.
c. Draw the mechanism...
Place 3.0 g of salicylic acid in a 125-ml Erlenmeyer flask. Carefully add, stirring constantly, 6...
Place 3.0 g of salicylic acid in a 125-ml Erlenmeyer flask. Carefully add, stirring constantly, 6 mL of acetic anhydride, followed by 10 drops of concentrated sulfuric acid. Swirl the contents of the flask so that the reactants are thoroughly mixed. Stopper the flask with a one- hole cork fitted with an inverted Pasteur pipet to prevent condensation of water in the reaction flask during heating on the steam bath. Heat the flask in a boiling-water or steam bath for...
CHROMIC ACID OXIDATION Pre Lab Questions the amounts of materials that will be used from the...
CHROMIC ACID OXIDATION Pre Lab Questions the amounts of materials that will be used from the experimental section above) H2SO4 + Na2Cr207 2H20- H2O, A Molecular Weight Theoretical yield amount moles on (if applicable) Equivalents 2. Look up the melting point for p-nitrobenzoic acid and record the reference. 3. What color change is expected to be observed in the reaction? Explain why. CHROMIC ACID OXIDATION Experimental Procedure: Part I: Synthesis of p-nitrobenzoic Acid 1. Under the hood, add 0.400 g...
tthe weight of my product is 0.87 g and they gave me the density! how can...
tthe weight of my product is 0.87 g and they gave me the
density! how can i calculte the percent yield?
- Page < 8 > of 14 | 0 Data and Observations Weight of product: Melting range of product: Attach any spectra to your laboratory report Calculations and Graphs Calculate the percent yield. Keep in mind that the reagents may not be 100% pure; refer to labels on the containers. The density of 50% aqueous sodium hydroxide is 1.5...
Bromination of Acetanilide In a 25-mL Erlenmeyer flask, dissolve 0.68 g of acetanilide in approximately 4...
Bromination of Acetanilide In a 25-mL Erlenmeyer flask, dissolve 0.68 g of acetanilide in approximately 4 mL glacial acetic acid. Record the exact amount of the limiting reactant that you used. Add a stir bar followed by 1.6 g pyridinium tribromide. Heat the mixture to ~60°C in a warm water bath for 10 minutes. After the 10 minutes, add 15 mL water and approximately 2 mL saturated sodium bisulfite solution to remove excess bromine, which shows by the disappearance of...
weighed watch glass and record the mass of the product. Write a balanced equation for the synthesis and hence...
weighed watch glass and record the mass of the product. Write a balanced equation for the synthesis and hence calculate the percentage yield (based on the mass of the nickel(II) chloride hexahydrate used) and record it, with working, in the lab notebook. 5.0 EXPERIMENTAL PROCEDURES I. Wear gloves throughout the experiment, and work in a fume cupboard throughout. Using an appropriate balance for synthetic work, weigh out 1.5 g of nickel(II) chloride hexahydrate and record the mass used. 2. Dissolve...
what would be the percent yield if the final weight of my product
is 0.1357g this is a green chemistry wittig reaction to produce
1,4-diphenyl-1,3-butadiene from benzyltriphenylphosphonium chloride
and trans- cinnamaledyde using sodium hydroxide as the base
You will be using a Green Chemistry Wittig reaction (NOT Wittig-Horner Emmons reaction) to produce 1,4-diphenyl-1,3-butadiene starting with benzyltriphenylphosphonium chloride and trans- cinnamaledyde using sodium hydroxide as the base. This reaction is considered a "green" reaction, because an aqueous solution will be used...
what is the percent yield of the lab procedure below?
my final weight of the product is 0.0519 g
sure of the proper disposal methodl, properly Check with your laboratory insructor if you are PROCEDURE Be sure to dry the 5-mL reaction vial in the oven for at least twenty minutes. Water is experiment. this Preparation of the Ylide 1. Place 0.480 g of benzyltriphenylphosphonium chloride in a dry, 5-mlL reaction vial containing a magnetic spin vane Add 2 mL...
1.)
What side reactions occur during the following steps.
2.) How can the IR spectrum be used to show that there is not
starting material left and the products are ketones?
3.) Describe the major differences and similarities between
the IR spectra of benzoin and benzil. Compare your IR spectrum with
those of benzoin and benzil.
Copper-Catalyzed Oxidation of Benzoin 1. Add a stir bar and 1.5 mL of glacial acetic acid, 0.250 g of NH4NO3 and 0.500 g of...
what is the theoretical yield of anisalacetophenone and
dibenzalacetone formed? thank you.
The Aldol Condensation Precautions: Acetone, ethanol and acetophenone are flammable; work in a fume hood. Sodium hydroxide is a strong base and can cause severe skin burns and eye damage. Safety goggles are required. Gloves are recommended. Purpose To carry out two Aldol condensation reactions in which no heat is needed to obtain the condensation product. The two reactions differ in the number of enolizable protons at the...
For the nitration of methyl benzoate:
a. Which product did you get? What evidence do you have for
this?
b. Was your product pure? What evidence do you have for this?
Explain your evidence.
c. Draw the mechanism for the product you got.
For the bromination of acetanilide:
a. Which product did you get? What evidence do you have for
this?
b. Was your product pure? What evidence do you have for this?
Explain your evidence.
c. Draw the mechanism...
Place 3.0 g of salicylic acid in a 125-ml Erlenmeyer flask. Carefully add, stirring constantly, 6 mL of acetic anhydride, followed by 10 drops of concentrated sulfuric acid. Swirl the contents of the flask so that the reactants are thoroughly mixed. Stopper the flask with a one- hole cork fitted with an inverted Pasteur pipet to prevent condensation of water in the reaction flask during heating on the steam bath. Heat the flask in a boiling-water or steam bath for...
CHROMIC ACID OXIDATION Pre Lab Questions the amounts of materials that will be used from the experimental section above) H2SO4 + Na2Cr207 2H20- H2O, A Molecular Weight Theoretical yield amount moles on (if applicable) Equivalents 2. Look up the melting point for p-nitrobenzoic acid and record the reference. 3. What color change is expected to be observed in the reaction? Explain why. CHROMIC ACID OXIDATION Experimental Procedure: Part I: Synthesis of p-nitrobenzoic Acid 1. Under the hood, add 0.400 g...
tthe weight of my product is 0.87 g and they gave me the
density! how can i calculte the percent yield?
- Page < 8 > of 14 | 0 Data and Observations Weight of product: Melting range of product: Attach any spectra to your laboratory report Calculations and Graphs Calculate the percent yield. Keep in mind that the reagents may not be 100% pure; refer to labels on the containers. The density of 50% aqueous sodium hydroxide is 1.5...
weighed watch glass and record the mass of the product. Write a balanced equation for the synthesis and hence calculate the percentage yield (based on the mass of the nickel(II) chloride hexahydrate used) and record it, with working, in the lab notebook. 5.0 EXPERIMENTAL PROCEDURES I. Wear gloves throughout the experiment, and work in a fume cupboard throughout. Using an appropriate balance for synthetic work, weigh out 1.5 g of nickel(II) chloride hexahydrate and record the mass used. 2. Dissolve...
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