"In haloalkanes, the large electronegativity difference between halogen and carbon atoms means that the carbon-halogen bond is polar. This makes the bond weaker than one without a dipole" - excerpt from my textbook
I don't particularly understand the last sentence. Can someone elaborate and explain what does "this makes the bond weaker than one without a dipole" means?
the strength of the inter molecular force goes the following: Dispersion, Dipole–Dipole and Hydrogen Bonding.
From my interpretation: Without dipole is equivalent to dispersion and dispersion is subsequently weaker than dipole dipole. But why does dipole dipole weaker than one without a dipole? Shouldn't it be stronger?
That sentence continues with "Species such as another halogen ion, a cyanide ion, ammonia can be substituted for the halogen in the polar bond."
Any help will be great. Thanks.