During the total synthesis, you attempt to purify your target product by recrystallization using ethanol. You...
During the total synthesis, you attempt to purify your target product by recrystallization using ethanol. You gently heat the solution until all of your crude product has dissolved. You try scratching the bottom of your flask, but that is also unsuccessful. What should you do to recover your target product so you can attempt the recrystallization again?
Homework Answers
You tried for recrystllztion of crude product but was unsuccessful.
To recover your target product from ethanol, evaporate the ethanol usng ROTARY EVAPORATOR.
Then you can try other solvets also like methanol, chloroform, acetone or mixture of solvents in same procedure as you did.
Eventhough, if you are unsuccessful you have to perform column chromatography.
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During the total synthesis, you attempt to purify your target
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Synthesis of crude product. 1. Combine reagents (following either step A or B, depending on the...
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1. Combine reagents (following either step A or B, depending on the
benzaldehyde assigned to
you). It is best not to use a brand-new conical vial right out
of the package, as the surface is not rough enough to help induce
precipitation.
A. In a 5-mL conical vial, combine 0.15 g of 3-nitrobenzaldehyde
(151.121 g/mol), 0.12 mL
of acetophenone (120.151 g/mol; d = 1.03 g/mL), and 0.80 mL of
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Prepare a table of all chemicals used in the procedure with
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please answer all parts I am trying to check my
answers.
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Synthesis of crude product.
1. Combine reagents (following either step A or B, depending on the
benzaldehyde assigned to
you). It is best not to use a brand-new conical vial right out
of the package, as the surface is not rough enough to help induce
precipitation.
A. In a 5-mL conical vial, combine 0.15 g of 3-nitrobenzaldehyde
(151.121 g/mol), 0.12 mL
of acetophenone (120.151 g/mol; d = 1.03 g/mL), and 0.80 mL of
95% ethanol.
OR
B. Pipette 0.13 mL...
SYNTHESIS OF trans-p-ANISALACETOPHENONE
Prepare a table of all chemicals used in the procedure with
their purpose
Melting point of trans-p-anisalacetophenone (with source) and
Molar mass of trans-p-anisalacetophenone (with source) (i cant find
these two things anywhere)
Procedure: 1. Carefully measure 1.0 mL each of p-anisaldehyde and acetophenone and place them in a screw-cap testtube. 2. To this add 3.0 mL of 95% ethanol. Shake the test tube gently to achieve a homogenous mixture. 3. Add 6-7 drops of 40% sodium...
Synthesis using Carbonyla-Substitution Chemistry Preamble This experiment involves the synthesis of target molecules using a-substitution chemistry. You are assigned two target molecules, one of which is best synthesized by an alkylation approach, while the other is best synthesized by an addition or condensation approach. My two target molecules are number 2 and number 12 in the last page. You must do the following: 1. Perform a retrosynthetic analysis on the two target molecules assigned to you. In each case the...
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please help with how the flow chart will look like? thank
you!
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what is the theoretical yield of anisalacetophenone and
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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...
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