CBSE Class 11-science Answered

Consider a general organic compound having molecular formula as C_aH_bN_cO_dX_e ,where,C-Carbon,

H-Hydrogen,

N-Nitrogen,

O-Oxygen,

X-Halogen.

Significance of double bond equivalence:

Using the Double Bond Equivalence we can find the number of the pi bonds present in the compound and in most of the cases also predict the exact structural formula of that compound.

D.B.E = (a+1)-{(b+e-c)/2} [D.B.E :- Double Bond Equivalence]

Ex.

(1)   D.B.E for CH₄ is 0 hence no pi bond is present.

(2)   D.B.E for C₂H₅O is 0 hence no pi bond is present.