Be sure to explain the correct answer choice.Do not give handwriting solution. Choose the best explanation for theproposed curved arrow mechanism for thesecond step of an electrophilic additionreaction of butadiene with HBr.:Br++:Br: Choose the best explanation for theproposed curved arrow mechanism for thesecond step of an electrophilic additionreaction of butadiene with HBr.:Br++:Br:

Given reactionIn organic chemistry, the addition of hydrogen bromide (HBr) to propene is a…

:Br: A) The cation rapidly switches between two positions of the electrophile. The bromine atom moves to whichever position currently has the positive charge. B) Attack of the bromide on the cation repels the positive charge, flipping it to the other end of the double bond. Attack at the other end flips the charge back again. C) The cation is found simultaneously in two positions of the electrophile. The electrons from the negatively charged bromide are attracted to either of these cationic positions, forming a bromine- carbon bond. D) The cation is in equilibrium between two positions of the electrophile. The bromine atom attacks whichever position currently has the positive charge.

:Br: A) The cation rapidly switches between two positions of the electrophile. The bromine atom moves to whichever position currently has the positive charge. B) Attack of the bromide on the cation repels the positive charge, flipping it to the other end of the double bond. Attack at the other end flips the charge back again. C) The cation is found simultaneously in two positions of the electrophile. The electrons from the negatively charged bromide are attracted to either of these cationic positions, forming a bromine- carbon bond. D) The cation is in equilibrium between two positions of the electrophile. The bromine atom attacks whichever position currently has the positive charge.

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter30: Orbitals And Organic Chemistry: Pericyclic Reactions

Section30.7: Sigmatropic Rearrangements

Problem 7P

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