ochem problems

[allstardentist]

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Which of the following substituents has the greatest
electron-withdrawing effect?
A. Br
B. Cl
C. F
D. CH3
E. NH2

Which of the following substituents has the greatest
electron-withdrawing effect?
A. Br
B. Cl
C. F
D. CH3
E. NH2

anyone?

 

[DMD to Be]

Which of the following substituents has the greatest
electron-withdrawing effect?
A. Br
B. Cl
C. F
D. CH3
E. NH2

Which of the following substituents has the greatest
electron-withdrawing effect?
A. Br
B. Cl
C. F
D. CH3
E. NH2

anyone?

CH3 and NH2 are activators - meaning they push electrons into the ring. A, B, and C are the only deactivators. I'd probably say Bromine would have the greatest electron-withdrawing effect. Not totally sure about that though.

 

[Immuno-guy]

Surely it is fluorine.

NH3 and CH3 are electron donating; leaving only halogens. Of these, F is clearly the most electonegative and therefore withdrawing.

Do we agree?

 

[aranjuez]

Immuno,

Agreed.

aranjuez

 

[allstardentist]

oops, u guys are right. i was right too. i just looked at the wrong solution.

 

[DMD to Be]

lol, guess i'll be moving my DAT test date back a few weeks...

 

[dental#1]

Which of the following substituents has the greatest
electron-withdrawing effect?
A. Br
B. Cl
C. F
D. CH3
E. NH2

Which of the following substituents has the greatest
electron-withdrawing effect?
A. Br
B. Cl
C. F
D. CH3
E. NH2




anyone?

C is 200% correct! F- is much more electronegative therefore giving it the ability to withdraw e- more than the others!(Br an Cl)
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