Several parameters,such as the C-O bond length and the natural atomic charge on hydrogen atom of car- boxylic group,the hydrogen-bond length and binding energy of hydrogen-bonded complexes,are linearly correlated with known experi- mental pKa values of carboxylic acids.

For an apropo interpretation of structural formula of dimers in Ⅲ A family,the hybridization of atoms in Ⅲ A family is illustrated in this paper as a two-equivalence hybridization (two SP2 hybrid orbits and two SP5 hybrid orbits),the bond angles and bond lengths Calculated from which are approching experimental measurements.

Calculations of bond dissociation energies and bond lengths of C-H,C-N,C-O,N-N;

An analystic computional method on the bond length and dissociation energy of H_2~+ ion;

In this paper an equation is given by using relating electronnegativity,the valence electronic number and prin- cipal quantum number,in order to find an easy formula to calculate the bond length of two coupled-atoms diatomic chlo- ride molecule.