Estimation of the Dissociation Energies of Donor-Acceptor Complexes of Group 13-15 Element Compounds within the Framework of the Statistical EC Model

The parameters of 18 Lewis bases of group 13-15 elements E'H2EH2 center dot LB (E' = P, As, Sb; E = B, Al, Ga; LB = SMe2, NMe3) and 18 Lewis acids of group 13 elements ER3 (R = H, F, Cl, Br, Me, C6F5) were optimized using a statistical approach within the electrostatic-covalent (EC) model. The EC model allows prediction of dissociation energies of donor-acceptor complexes with an absolute median deviation of +/- 4 kJ mol(-1), but this approach is not applicable to estimation of donor-acceptor bond energies.