  The zero-temperature conductance of diatomic molecule, modelled as a
correlated double quantum dot attached to noninteracting leads is investigated.
We utilize the Rejec-Ramsak formulas, relating the linear-response conductance
to the ground-state energy dependence on magnetic flux within the framework of
EDABI method, which combines exact diagonalization with ab initio calculations.
The single-particle basis renormalization leads to a strong particle-hole
asymmetry, of the conductance spectrum, absent in a standard parametrized model
study. We also show, that the coupling to leads V=0.5t (t is the hopping
integral) may provide the possibility for interatomic distance manipulation due
to the molecule instability.
