Question

4. Answer the following questions associated to 1,4-pentadiene. (Rewrote based on Solomons' 13.27-28) a. The hydrogen atoms attached to C3 are susceptible to abstraction by radicals. Why? b. In free radical bromination, instead of directly using Br$_2$, N-bromosuccininimide (NBS) is often used due to a minder and better controlled reaction condition. Commercial NBS reagent always contains a small amount HBr. NBS reacts with HBr to generate Br$_2$. Use curved arrow to demonstrate the reaction mechanism for the following free radical bromination reaction. c. Explain the difference of pKa of the following two compounds 

          4. Answer the following questions associated to 1,4-pentadiene. (Rewrote based on Solomons' 13.27-28)
a. The hydrogen atoms attached to C3 are susceptible to abstraction by radicals. Why?
b. In free radical bromination, instead of directly using Br$_2$, N-bromosuccininimide (NBS) is often used due to a minder and better controlled reaction condition. Commercial NBS reagent always contains a small amount HBr. NBS reacts with HBr to generate Br$_2$. Use curved arrow to demonstrate the reaction mechanism for the following free radical bromination reaction.
c. Explain the difference of pKa of the following two compounds
Show more…
4. Answer the following questions associated to 1,4-pentadiene. (Rewrote based on Solomons' 13.27-28) a. The hydrogen atoms attached to C3 are susceptible to abstraction by radicals. Why? b. In free radical bromination, instead of directly using Br2, N-bromosuccininimide (NBS) is often used due to a minder and better controlled reaction condition. Commercial NBS reagent always contains a small amount HBr. NBS reacts with HBr to generate Br2. Use curved arrow to demonstrate the reaction mechanism for the following free radical bromination reaction. c. Explain the difference of pKa of the following two compounds

Added by Mercedes B.

Close

Chemistry: Structure and Properties
Chemistry: Structure and Properties
Nivaldo Tro 2nd Edition
AceChat toggle button
Close icon
Ace pointing down

Please give Ace some feedback

Your feedback will help us improve your experience

Thumb up icon Thumb down icon
Thanks for your feedback!
Profile picture
Answer the following questions associated with 1,4-pentadiene. (Rewritten based on Solomons' 13.27-28) a. The hydrogen atoms attached to C3 are susceptible to abstraction by radicals. Why? b. In free radical bromination, instead of directly using Br2, N-bromosuccinimide (NBS) is often used due to a milder and better-controlled reaction condition. Commercial NBS reagent always contains a small amount of HBr. NBS reacts with HBr to generate Br2. Use curved arrows to demonstrate the reaction mechanism for the following free radical bromination reaction. c. Explain the difference in pKa of the following two compounds: pKa 35 pKa 43
Close icon
Play audio
Feedback
Powered by NumerAI
Jennifer Stoner Danielle Fairburn
Kathleen Carty verified

Adi S and 68 other subject Chemistry 101 educators are ready to help you.

Ask a new question
*

Labs

-

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs
*

Key Concepts

-
Key Concept
Premium Feature
Explore the core concept behind this problem.
Play button
Key Concept
Premium Feature
Explore the core concept behind this problem.
Your browser does not support the video tag.
*

Recommended Videos

-
4-in-the-presence-of-a-small-amount-ofn-bromosuccinimide-the-following-light-promoted-reactions-has-been-observed-chz-ch-ch-nbs-cci4-ch-ch-write-mechanism-for-the-reaction-your-mechanism-sho-92172

Adi S.
a-3-butene-_-2-one-can-conceivably-react-as-a-lewis-acid-at-any-of-the-three-sp_-hybridized-carbon-atoms_-draw-the-products-of-the-three-lewis-acid-base-reactions-where-each-carbon-reacts-wi-10748

(a) 3-Butene-2-one can conceivably react as a Lewis acid at any of the three sp2 hybridized carbon atoms. Draw the products of the three Lewis acid-base reactions where each carbon reacts with a general nucleophile, Nuc:-, as well as the arrow-pushing mechanism of the formation of each product. Include resonance structures where required. (11 points) (b) One of the three labeled carbons is much less electrophilic than the other two. Which one, and why? (2 points) (c) Which reaction is the most favorable, and why? That is, which carbon is the most electrophilic? (Assume the reaction which makes the most stable product is most favorable.) (2 points) (d) In strong acid, 3-buten-2-one is protonated on an oxygen lone pair. Draw all resonance structures for this conjugate acid (with curved arrows), as well as a hybrid with appropriately sized partial charges. (5 points) (e) Using any of the RS’s you drew in (d), draw two different possible Lewis acid/base reactions with Nuc:-. Show arrows for the mechanism and structure of the product of each reaction. (4 points)

Adi S.
a-3-butene-_-2-one-can-conceivably-react-as-a-lewis-acid-at-any-of-the-three-sp_-hybridized-carbon-atoms_-draw-the-products-of-the-three-lewis-acid-base-reactions-where-each-carbon-reacts-wi-10748

(a) 3-Butene-2-one can conceivably react as a Lewis acid at any of the three sp2 hybridized carbon atoms. Draw the products of the three Lewis acid-base reactions where each carbon reacts with a general nucleophile, Nuc:-, as well as the arrow-pushing mechanism of the formation of each product. Include resonance structures where required. (11 points) (b) One of the three labeled carbons is much less electrophilic than the other two. Which one, and why? (2 points) (c) Which reaction is the most favorable, and why? That is, which carbon is the most electrophilic? (Assume the reaction which makes the most stable product is most favorable.) (2 points) (d) In strong acid, 3-buten-2-one is protonated on an oxygen lone pair. Draw all resonance structures for this conjugate acid (with curved arrows), as well as a hybrid with appropriately sized partial charges. (5 points) (e) Using any of the RS’s you drew in (d), draw two different possible Lewis acid/base reactions with Nuc:-. Show arrows for the mechanism and structure of the product of each reaction. (4 points)

Adi S.
*

Recommended Textbooks

-
Chemistry: Structure and Properties

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition
achievement 1,109 solutions
Chemistry The Central Science

Chemistry The Central Science

Theodore L. Brown 14th Edition
achievement 1,550 solutions
Chemistry

Chemistry

Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste 10th Edition
achievement 1,440 solutions
*

Transcript

-
00:04 Mechanism for the reaction is there is a small amount of n -bromo -succinimide is present in the reaction.
00:27 This succinimide amine the structure is double bond o double bond o nbr.
00:42 The electron shift ion dissociate into double bond o double bond o nbr...
Need help? Use Ace
Ace is your personal tutor. It breaks down any question with clear steps so you can learn.
Start Using Ace
Ace is your personal tutor for learning
Step-by-step explanations
Instant summaries
Summarize YouTube videos
Understand textbook images or PDFs
Study tools like quizzes and flashcards
Listen to your notes as a podcast
Continue solving this problem
Create a free account to:
  • View full step-by-step solution
  • Ask follow-up questions with Ace AI
  • Save progress and study later
Continue Free
Join the community

18,000,000+

Students on Numerade

Trusted by students at 8,000+ universities

Numerade

Get step-by-step video solution
from top educators

Continue with Clever
or



By creating an account, you agree to the Terms of Service and Privacy Policy
Already have an account? Log In

A free answer
just for you

Watch the video solution with this free unlock.

Numerade

Log in to watch this video
...and 100,000,000 more!


EMAIL

PASSWORD

OR
Continue with Clever