Abstract
The definition, in a previous paper, of a new type of carbon atom (type 44) in the MM2 force field, i.e. when it is cross-conjugated, implies the reparameterisation of the bonds adjacent to the carbonyl bond. By means of a statistical study based on data issued from the Cambridge Structural Data System, we propose here new σ dipole moments and new stretching parameters for the C(44)-O(41) and C(44)-N(40) bonds included in heterocyclic compounds.
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