Chapter 11.3, Problem 7P

Interpretation Introduction

Interpretation:

The $\text{C-H}$ bonds of $\text{Trans-3-hexene}$ are to be ranked in the order of decreasing bond dissociation enthalpy.

Concept introduction:

Bond dissociation enthalpy is the amount of energy required to break a covalent bond.

The stronger the bond, the higher the bond dissociation enthalpy.

The $\text{C-H}$

bond in alkenes is stronger than the $\text{C-H}$

bond in alkanes. The ${\text{sp}}^2$-hybridized carbon atoms have stronger $\text{C-H}$

bonds than $\text{C-H}$

bonds in ${\text{sp}}^3$-hybridized carbon atoms.

Allylic $\text{C-H}$ bonds are weaker than non-allylic (alkyl) $\text{C-H}$ bonds.