The MACQM calculation for the binding energy of the equilateral triangle structure of H-3(-) cluster

Considering that the equilateral triangle structure of H-3(-) cluster can b e formed from the interaction of H- with two hydrogen atoms, a modified arr angement channel quantum mechanics method has been used to calculate the to tal energy curve for this structure. The result shows that the curve has a minimal energy -1.6672 a.u. at an internuclear distance of 1.77(a0), so its dissociation energy (binding energy) is D(H- + H + H) = 0.1395 a.u. This m eans that the cluster H-3(-) may be formed in an equilateral triangle struc ture with a bond length of 1.77a(0).