How many double bond equivalents (degrees of unsaturation) are in 2,2,3,3-tetramethyl-4-octyne?

1 Answer
Dr. Hayek · Truong-Son N.
Sep 26, 2015

#DBE=2#

In other words, the molecule has 2 degrees of unsaturation.

Explanation:

The molecular formula of 2,2,3,3-tetramethyl-4-octyne is #C_12H_22#

The general formula for calculating the double bond equivalent (DBE) is:

#DBE=C-H/2+N/2+1#

where, #C# is the number of carbon atoms, #H# is the number of hydrogen and halogen atoms, and #N# is the number of nitrogen atoms if there is any in the molecule.

Therefore, in this case:

#DBE=12-(22)/2+(0)/2+1=2#

It is logic to find #DBE=2# since we have two #pi# bonds in a triple bond.

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