Question

Indicate the σ and π bonds in the following molecules. \(C_6H_6, C_6H_{12}, CH_2Cl_2, CH_2=C=CH_2, CH3NO2, HCONHCH_3.\)

Answer 1

(i) C₆H₆
There are six C-C sigma (σ C-C) bonds, six C–H sigma (σ C-H)  bonds, and three C=C pi (𝜋𝐶−𝐶) resonating bonds in the given compound.  

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(ii) ) C₆Hl₂

There are six C-C sigma (σ C-C) bonds and twelve C-H sigma (σ C-H)  bonds in the given compound.

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(iii) CH₂Cl₂

There are two C-H sigma (σ C-H) bonds and two C-Cl sigma (σ C-Cl) bonds in the given compound. 

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(iv) CH₂ = C = CH

There are two C-C sigma (σ C-C) bonds, four C-H sigma (σ C-H ) bonds, and two C=C pi (σ C-C) bonds in the given compound. 

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(v) CH₃NO₂

There are three C-H sigma (σ C-H) bonds, one C-N sigma (σ C-N) bond, one N-O sigma (σ N-O) bond, and one N=O PI(π N=O) bond in the given compound.

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 (vi) HCONHCH₃

There are two C-N sigma (σ C-N) bonds, four C-H sigma (σ C-H) bonds, one N-H sigma bond, and one C=O pi (π C-C) bond in the given compound.