What is TRUE about the reaction below? Select one: O a. The reaction has the same rate when the base is replaced by aniline. O b. There are two products formed in this reaction OC. An aldol condensation reaction will occur. d. The presence of the aromatic aldehyde hinders the reaction to occur. H O -OH

What is TRUE about the reaction below? Select one: O a. The reaction has the same rate when the base is replaced by aniline. O b. There are two products formed in this reaction OC. An aldol condensation reaction will occur. d. The presence of the aromatic aldehyde hinders the reaction to occur. H O -OH

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter14: Elimination

Section: Chapter Questions

Problem 2E

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Which statement describes why aldol reactions with ketones are low yielding? A.Ketones do not have acidic protons. B.Ketones are too electron poor at the carbonyl carbon. C.Ketones can attack other ketones well but perform poorly in self-condensations. D.The product of a ketone addition to a ketone has considerable steric strain.
I need help determining the starting materials for these three aldol reactions.
All are true or false a) The initially formed b-hydroxy carbonyl compound loses water in a Aldol condensation. b) Equilibrium favors the starting materials with both aldehydes and ketones for Aldol reactions. c)The Claisen reaction is a type of nucleophilic addition? d) The b-hydroxy carbonyl product of an Aldol reaction is oftentimes not the final isolated product. e)b-Ketoester and an enolate are the two starting materials for a Robinson annulation
Explain why a Lewis acid is necessary in this aldol reaction. Include a structure formed by the Lewis Acid and one of the reactants that is key to your discussion. R group is p-methoxyphenyl to make p-methoxybenzaldehyde (reactant). R' is phenyl.
50. Why do we need to use lewis acids before electrophilic aromatic substitution reaction proceeds? to produce a better nucleophile to make the reaction proceed faster to make the starting material more activated to produce a better electrophile
Your aldol condensation procedure calls for refluxing vanillin in acetone and NaOH for an hour. Whatmight happen if you didn’t heat the reaction, or heated it for too short a time? a) A mixture of aldol products and hydroxyketone intermediates would form.b) No reaction would occur, as the heat is needed to deprotonate the acetone.c) The reaction would still be successful.d) No reaction would occur, as the heat is needed to dissolve the NaOH.
The sequence for the synthesis is shown, Draw the "intermediate product" after the reaction with reagent 10.
For number 2 find the reagent For number 3 do synthesis using enolate reactions
for the theroretical yield is the mol correct? also using the aldol condensation reaction in this portion are we using the aldol condensation reaction to synthesize acetophenone and para-methybenzaldehye. acetophenone 0.5 g, 4.2 mmol Para-methylbenzaldehyde 0.5 g, 4.2 mmol NaOH=0.18g = 4.5 mol Theroretical yield=0.93g =0.0519 mol Percent yield=76.8% Actual yield= 0.715 g Melting point observered= 93 degree Celsius Expected melting point =93-94.5 degree Celsius
Why is the reaction of the type shown below usually done? a.To make an aldehyde or ketone less water soluble b.To make the molecule more reactive c.To protect a ketone or aldehyde carbonyl d.To increase the oxygen content e.To make the alpha hydrogens more acidic
Aldol Condensation What products are formed? What is the difference between aldol reactions and aldol condensation? What type of reaction condentionas are used?
10. Consider the below reaction between the acetylide ion and methanol. Draw the conjugate acid that is formed as a product in this reaction.