Answer
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Hint: If there is a single bond between any atom, then that bond can be considered as a \[\sigma \] bond. The multiplicity of a bond shows presence of a \[\pi \]-bond in addition to a \[\sigma \] bond.
Complete step by step solution:
A \[\pi \] bond is formed by overlap of orbitals in a side-by-side fashion and has zero electron density at its nodal planes. In other ways we can say that in a double bond, there is one \[\pi \]-bond and one \[\sigma \]-bond is present.
Let’s calculate the number of \[\pi \]-bonds present in the given compound.
You can see that there are 4 double bonds present in the compound and hence the number of \[\pi \]-bonds present in the given compound will be equal to 4.
Let’s find the number of \[\sigma \]-bonds present in the compound.
We can see that there are a total 19 \[\sigma \]-bonds present in the compound. Also draw C-H bonds and consider them in the counting of bonds as well.
So, correct answer is (C) 19\[\sigma \],4\[\pi \]
Additional Information:
A double bond is made up of one \[\sigma \]-bond and one \[\pi \]-bond. While a triple bond can be said to be made up of one \[\sigma \]-bond and two \[\pi \]-bonds.
\[\sigma \]-bond is more stronger than a \[\pi \]-bond.
Note:
Do not forget to include C-H \[\sigma \]-bonds in the counting process of total \[\sigma \]-bonds as they are often not shown in the structure and may lead to mistakes. Do not forget to include a \[\sigma \]-bond from a C-C double bond.
Complete step by step solution:
A \[\pi \] bond is formed by overlap of orbitals in a side-by-side fashion and has zero electron density at its nodal planes. In other ways we can say that in a double bond, there is one \[\pi \]-bond and one \[\sigma \]-bond is present.
Let’s calculate the number of \[\pi \]-bonds present in the given compound.
You can see that there are 4 double bonds present in the compound and hence the number of \[\pi \]-bonds present in the given compound will be equal to 4.
Let’s find the number of \[\sigma \]-bonds present in the compound.
We can see that there are a total 19 \[\sigma \]-bonds present in the compound. Also draw C-H bonds and consider them in the counting of bonds as well.
So, correct answer is (C) 19\[\sigma \],4\[\pi \]
Additional Information:
A double bond is made up of one \[\sigma \]-bond and one \[\pi \]-bond. While a triple bond can be said to be made up of one \[\sigma \]-bond and two \[\pi \]-bonds.
\[\sigma \]-bond is more stronger than a \[\pi \]-bond.
Note:
Do not forget to include C-H \[\sigma \]-bonds in the counting process of total \[\sigma \]-bonds as they are often not shown in the structure and may lead to mistakes. Do not forget to include a \[\sigma \]-bond from a C-C double bond.
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