Question
State the rules to be followed for writing resonating structures.
✓
Answer
Rules to be followed for writing resonating structures:
- Resonance structures can be written only when all the atoms involved in the n conjugated system lie in the same place.
- All the resonance structures must have the same number of unpaired electrons.
- Resonance structures contribute to the resonance hybrid in accordance to their energy or stability. More stable (having low energy) resonance structures contribute largely and thus are important.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Give the mathematical expression for Gay$-$Lussac’s law.
→A neon-dioxygen mixture contains 70.6 g dioxygen and 167.5g neon. If pressure of the mixture of the gases in the cylinder is 25 bar. What is the partial pressure of dioxygen and neon in the mixture?
Draw structures of following analgesics and write their molecular formula,
i. Aspirin
ii. Paracetamol
i. Aspirin
ii. Paracetamol
Give the carbon-carbon bond length in benzene. Explain why benzene shows unusual behaviour.
What is the action of chlorine on benzene in the presence of UV light?
Give reason: Hydrogen $(H2)$ molecule is also referred to as dihydrogen.
→| Column ‘A’ | Column ‘B’ | ||
| i. | Inductive effect | a. | Delocalization of π electrons |
| ii. | Hyperconjugation | b. | Displacement of π electrons |
| iii. | Resonance effect | c. | Delocalization of σ electrons |
| d. | Displacement of σ electrons |
Write the structural formulae for the following names and also write correct IUPAC names for them.
a. 5-ethyl-3-methylheptane
b. 2,4,5-trimethylthexane
c. 2,2,3-trimethylpentan-4-01
a. 5-ethyl-3-methylheptane
b. 2,4,5-trimethylthexane
c. 2,2,3-trimethylpentan-4-01
Which of the following redox couple is stronger reducing agent?
a. Li $\left(E^0=-3.05 V \right)$ and $M g\left(E^0=-2.36 V \right)$
b. $Zn \left( E ^0=-0.76 V \right)$ and $Fe \left( E ^0=-0.44 V \right)$
→a. Li $\left(E^0=-3.05 V \right)$ and $M g\left(E^0=-2.36 V \right)$
b. $Zn \left( E ^0=-0.76 V \right)$ and $Fe \left( E ^0=-0.44 V \right)$
Complete the following reactions by mentioning the reagent/reaction conditions under which these reactions are carried out.