mesomeric and inductive effect

[Dr_fatima A. El_shazly]

peace be upon you all

 

 

What's the differenece between mesomeric and inductive effect?

 

and please mention the famous groups and if it produce mesomeric or inductive effect

 

also if they are electron donating or electron withdrawing groups

 

 

thanks very much

 

 

I wish you are fine

[Dan_Ny]

peace be upon you all

 

 

What's the differenece between mesomeric and inductive effect?

 

and please mention the famous groups and if it produce mesomeric or inductive effect

 

also if they are electron donating or electron withdrawing groups

 

 

thanks very much

 

 

I wish you are fine

 

Yo

 

inductive effects are through-bond polarizations which are due to different electronegatvity of the two partners of a sigma bond. For example if you have a hydroxyl-group in a carbon framework, the binding electrons between C and OH will be "drawn" to the side of the hydroxy-oxygen.

 

mesomeric effects are polarizations vial pi-bonds. pi bonds arise from the conjugation of p orbitals. So if you have a carbonyl group, for example, in that group the oxygen draws electrons as well as by an inductive effect (sigma bond) as by an mesomeric effect (pi bond) from the carbon atom in the carbonyl.

 

the pi-conjugation in aromatic compounds functions (as another example of a mesomeric effect) as a "pi-relay" for electron-withdrawal via pi bonds.

 

yeah but you will find much better explanations of this on wikipedia:

 

http://en.wikipedia.org/wiki/Mesomeric_effect

 

Yours