How to calculate pi bond and sigma bond for ${CH}_{2} {=C=CHCH}_{3}$ $"CH"_2"=C=CHCH"_3$ ?

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Answer 1 · 2018-06-07T16:30:56

$2, 9$ $2, 9$

Number of $σ$ -bonds = Sum of single and double bonds
Number of $pi$ -bonds = Total number of double bonds

$"CH"_2="C"="CH"–"CH"_3$

In above structure

How to calculate pi bond and sigma bond for "CH"_2"=C=CHCH"_3CH2=C=CHCH3"CH"_2"=C=CHCH"_3?