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srini (356)

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Hi!...
Is it true that resonance and hyper conjugation are given same preference for stability?

GIVE LIFE THE BEST....srini...
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I dont want to be the most intelligent among the ten.i pray the other nine RE fools!???!!!!!!
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aditya_arora04 (1077)

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Hi,
 
I don't think so.
 

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sidlol (220)

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Hyperconjugation is less effective than pi-bond resonance. (I say that because hyperconjugation is really sigma-bond resonance.)
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srini (356)

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hi.......
It is given in m&b pg 574  

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I dont want to be the most intelligent among the ten.i pray the other nine RE fools!???!!!!!!
it doesn't matter if you win... whats important to me is i win!!!!!!!!
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sidlol (220)

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"15.17 Theory of orientation" ?
 
Nothing like that is given there.
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srini (356)

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hi.
oh sorry it might be a different edition..........

GIVE LIFE THE BEST....srini...
DO OR DIE, OR BETTER NEVER TRY!!
I dont want to be the most intelligent among the ten.i pray the other nine RE fools!???!!!!!!
it doesn't matter if you win... whats important to me is i win!!!!!!!!
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khyatigupta (49)

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Acc to me hyperconjugation is most effective than all other effect like resonance, inductive or mesomeric.In comparing the stability of a compounds having both resonance and hyperconjugation , the effect of hyperconjugation dominates.so acc to me hyperconjugation shld be more effective.
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srini (356)

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Hi.
hey adiyya,sidlol,khatyigupta.
in pg 574 of morrison boyd it is given the reactivity-s t a bility of carbo cation as
30>benzyl,allyl,20>10........
pg 391in stability of free radical     
 
allylic>30>20>10>ch4>vinyl
  

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I dont want to be the most intelligent among the ten.i pray the other nine RE fools!???!!!!!!
it doesn't matter if you win... whats important to me is i win!!!!!!!!
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deepu_0088 (197)

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resonance is given more preference than hyperconjgation
i am sure
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srini (356)

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Hi.
P l e a s e check morrison and boyd
 

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I dont want to be the most intelligent among the ten.i pray the other nine RE fools!???!!!!!!
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nik_d_1 (177)

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resonance>hyperconjugation>inductive effect




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hellomrranjay (9)

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Hyperconjugation is given more priority as compared to resonance
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srini (356)

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Hi.
Thanks for considering to reply.but what is the reason

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I dont want to be the most intelligent among the ten.i pray the other nine RE fools!???!!!!!!
it doesn't matter if you win... whats important to me is i win!!!!!!!!
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srini (356)

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Hi.
Please some one tell properly not clear............

GIVE LIFE THE BEST....srini...
DO OR DIE, OR BETTER NEVER TRY!!
I dont want to be the most intelligent among the ten.i pray the other nine RE fools!???!!!!!!
it doesn't matter if you win... whats important to me is i win!!!!!!!!
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beck2ham (99)

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The correct order is:
 
resonance>hyperconjugation>inductive effect
 
The reason is that resonance operates through -bonds , thus the electrons move much easily . Whereas , inductive effect operates through sigma bonds, which are much stronger than pi-bonds, thus, electrons dont move easily.
 
Thus, resonance is more contributing towards stab