Draw all secondary resonance structures for benzaldehyde.a. Is the aldehyde group electron donating or electron withdrawing?b. Which position(s) on the aromatic ring are most likely to react with anelectrophile?H

Approach to solving the question: Detailed explanation:Since -CHO is an EWG, it decreases the…

Answered: Draw all secondary resonance structures…

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter25: Enolate & Enol Nucleophiles

Section: Chapter Questions

Problem 16E

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What explains why many aldehydes and ketones can undergo self- condensation reactions in basic conditions? A. The alpha carbon can lose a proton and act like a nucleophile and the carbonyl carbon a an electrophile B. The alpha carbon can gain a proton and act like an electrophile and the carbonyl carbon is a nucleophile C. The oxygen of the carbonyl group can attack the carbon of the carbonyl group D. Only esters can undergo self-condensation reactions
What is the major difference between the base-catalyzed and acid-catalyzed processes for nucleophilic addition of water to aldehydes and ketones? a. The base-catalyzed reaction takes place rapidly because hydroxide ion is a much better nucleophile than neutral water. b. The rate of reaction in base catalyzed process is slower than acid catalyzed process. c. The acid-catalyzed reaction takes place rapidly because the protonated carbonyl compound is a much better electrophile than the neutral compound. d. Only 1 and 3 are correct.
For alkylhalides, elimination reaction is much favored than substitution reaction when A. Temperature is relatively high. B. Temperature is relatively low. C. Base is relatively weak D. Pressure is relatively high.
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e) sec-butyl bromide • Question 2: Identify the nucleophile and leaving group and draw the products of each reaction. a. b. Br + + OCH₂CH3 NaOH d. Br + N3 + NaCN
What is the first step in the general mechanism for electrophilic aromatic substitution? a. aromatic ring protonation b.loss of the electrophilic aromatic ring c. deprotonation of the aromatic ring d.addition of the electrophilic to the aromatic ring.
To prepare an ether from an alkyl halide by a nucleophilic substitution reaction, what are the two types of nucleophiles that can be used?
Which of the following does not undergo conjugate addition with butanamine? a. Propenal b. But-2-enal c. But-3-enal d. Butenone
Which of the following can behave as an electrophile? A. HBr B. Cl- C. CH3O- D. CH3CH2CH2CH3
Why is it not advisable to use aqueous hydrochloric acid in a Grignard reaction of a ketone? A) The Grignard reagent will react with the acid and cannot react with the ketone. B) The ketone will be protonated and will become unreactive. C) The ketone will form an unreactive enol. D) The Grignard reagent won't dissolve in aqueous solutions
Draw the products of each acid–base reaction.
Provide an appropriate alkyne starting material A and intermediate product B. Omit byproducts. The number of carbon atoms in the starting material should be the same as in the final product. 1. R2BH, THE Alkyne Intermediate Starting Material 2. H2O2, NaOH, H2O A Draw intermediate B. Draw alkyne starting material A. Rings More Erase Select Draw Rings More Erase Select Draw H H

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Draw all secondary resonance structures for benzaldehyde. a. Is the aldehyde group electron donating or electron withdrawing? b. Which position(s) on the aromatic ring are most likely to react with an electrophile? H