Question 2
Indicate the σ and π bonds in the following molecules :
(i) C6H6,
(ii) C6H12,
(iii) CH2Cl2,
(iv) CH2=C=CH2,
(v) CH3NO2,
(vi) HCONHCH3
(i) C6H6
There are six C-C sigma (σC-C) bonds, six C-H sigma (σC-H) bonds and three C=C pi (πC-C) resonating bonds in the given compound.
(ii) C6H12
There are six C-C sigma (σC-C) bonds and twelve C-H sigma (σC-H) bonds in the given compound.
(iii) CH2Cl2
There two C-H sigma (σC-H) bonds and two C-Cl sigma (σC-Cl) bonds in the given compound.
(iv) CH2=C=CH2
There are two C-C sigma (σC-C) bonds, four C-H sigma (σC-H) bonds, and two C=C pi (πC-C) bonds in the given compound.
(v) CH3NO2
There are three C-H sigma (σC-H) bonds, one C-N sigma (σC-N) bond, one N-O sigma (σN-O) bond and one N=O pi (πN-O) bond in the given compound.
(vi) HCONHCH3
There are two C-N sigma (σC-N) bonds, four C-H sigma (σC-H) bonds, one N-H sigma bond, and one C=O pi (πC-O) bond in the given compound.
