Bond strength...



All
 I am struggling to understand how bond strength is envisioned and how it
 can be extracted from an ab initio calculation. Bond strength is commonly
 discussed in terms of orbital overlap but I have not been able to find any
 quantitative explanations.
 An NBO analysis produces two-center orbitals, energies thereof, and the
 relative contribution from atomic orbitals. Can the two-center bond
 strength be extracted from this information?
 Thanks,
 Roy Jensen