Question
Mon March 05, 2012 By:
 

Explain 'double bond equivalents' and its significance.

Expert Reply
Mon March 05, 2012

Consider a general organic compound having molecular formula as CaHbNcOdXe ,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.

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