Easy tricks to find σ bond

Tricks to find  bond:

Calculation of σ-bonds (S):

Formula number 1 for σ-bonds (S):  J+N-1

  

Where,

S= Total number of sigma bond

J= Total number of hydrogen atoms

N= Total number of carbon atoms

Note: This formula is applicable for simple open chain unsaturated hydrocarbon

Example :  

1. C₁₇₆H₂₅₀

S= 250+176-1 = 425

2. C₂H₄

S= 4+2-1 = 5

Formula number 2:  σ-bonds (S):

S= Number of atoms other than C + (number of C atom -1)

Note: This formula is applicable for simple open chain unsaturated hydrocarbon and their derivatives.

Example:  

1.     C₆N₄

         S= 4+ (6-1) = 9