ANISOTROPY OF NONADDITIVE ENERGIES FOR INTERACTIONS IN SOME TRIMERS CONTAINING HOMONUCLEAR MOLECULES

The second-order non-additive induction energy for interactions in tri mers containing the linear homonuclear molecules H-2,N-2 and O-2 has b een computed for two different configurations via expressions recently derived using the MAPLE symbolic computational language. The configur ations are a linear, symmetric and an equilateral triangle arrangement of the trimers: H-2-H-2-H-2, N-2-N-2-N-2, O-2-O-2-O-2, N-2-N-2-O-2, N -2-H-2-O, and O-2-N-2-H-2. The induction energies are compared with th e corresponding triple-dipole dispersion energies for the two differen t configurations. The significance of these results is also discussed.