Resonance, Chemistry

 

Sometimes more than one valence structure is possible and there shows to be no unique assignment. A familiar organic example is in the disposition of single and double C-C bonds in benzene. In the carbonate ion 11) the three structures shown are equivalent by symmetry, and experimentally all three C-O bonds have same length. We describe this situation as resonance between the different structures, and represent it by the double headed arrows shown in 11. The term is misleading as it suggests a fast oscillation between different structures, which certainly does not happen. It is better to think of a wavefunction that is contracted by combining the structures, none of which on their own describe the bonding correctly.

 

 

2244_Untitled.png

                                   11

Resonance may also be appropriate with different valence structures that are not equivalent but look equally plausible, as in nitrous oxide (N2O 12).

 

 

1588_Untitled.png

Posted Date: 7/21/2012 9:01:19 AM | Location : United States







Related Discussions:- Resonance, Assignment Help, Ask Question on Resonance, Get Answer, Expert's Help, Resonance Discussions

Write discussion on Resonance
Your posts are moderated
Related Questions
libermann nitroso reaction

molecular weight of orthophosphoric acid is M.Its equivalent weight

Define Composition of individual phase in phase diagram–three phase? A binary system with three phases has only one degree of freedom and cannot be represented by an area on a

names of acid redicals of group 1

conclusion for Werner''s coordination theory assignment

how to check the quality of sesame oil such as fat, nutrients, etc.,?

what is true about all rocks

100 mol/hr pentane flows through an adiabatic heat exchanger where it is heated isobarically (at 2.5 bar) from 50°C to 250°C. The pentane is heated by contacting pipes filled with

what is the balanced equation of the burning of an unknown hydrocarbon, C4H9 in air

The Fermi level is The highest occupied energy level at 0 0 K.