Chemistry - GOC Question with Solution | TestHub
In which of the following pairs of compounds, will second structure have more contribution to resonance hybrid than first?
Options:(select one or more)
Answer:
Solution:
Explanation -
Asking about the pair of structures in which II contribute more than I in resonance hybrid. Concept -
This question is based on resonance effect and stability of resonating structure.
Solution :
More stable resonance structure contributes more to the resonance hybrid.
Resonance structure having more number of π bonds is the more stable.
In resonance structures of options 1, 2 & 3, Structure II have complete octet at all atoms (except-H) and more number of π-bonds. Therefore in options 1,2 and 3 Stability & contribution in resonance hybrid: II >I
In resonance structures of option-4, structure I have complete octet and more stable than II.
Final Answer: The correct options are (A), (B) & (C).