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Last updated date: 30th Nov 2023
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MVSAT Dec 2023

What is Resonance? Explain with a suitable example. Define Resonance energy.

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Hint: We know that Resonance basically defines the polarity produced in a molecule by the interaction between a lone pair and a pi bond or the interaction of two pi bonds in adjacent atoms. Stabilization of negative charges. A resonant structure where negative charge is present on the most electronegative element is most significant.

Complete answer:
Resonance in other words means that a molecule can be drawn with multiple Lewis structures but it actually exists in a hybrid state between the various configurations. It is usually found in molecules with conjugated double bonds or in molecules having at least one lone pair and one double bond. Resonance is an important factor in deciding the stability of the compound and its energy state.
The rule of least charges: the resonant structure having lowest charge is the most significant one. The octet principle: the resonant structures with full octet are more significant than the ones lacking in octet competition. Stabilization of positive charges: resonant structures where positive charge is present on the least electronegative element are most significant.
Resonance, An object free to vibrate tends to do so at a specific rate called the object's natural, or resonant, frequency. This phenomenon is called resonance. Through resonance, a comparatively weak vibration in one object can cause a strong vibration in another. Pushing a person in a swing is a common example of resonance. The loaded swing, a pendulum, has a natural frequency of oscillation.

Remember that the rules for determining the most significant resonance structure should be kept in mind. The positive charge on less electronegative atoms and the negative charge on more electronegative atoms is the most important and basic rule while deciding the most significant resonating structure.