XH(sub 5)(super 2+) dications and XH(sub 6)(super 3+) trications (X = N, P, and As)

Ab initio computations were performed which show that Cs symmetrical structures are the stationary points on the potential energy surfaces of PH(sub 5)(super 2+) adn AsH(sub 5)(super 2+). The optimized structure indicates that the symmetrical structures have a 3c-2e bond. On the other hand, the D3h symmetrical, C2v symmetrical and C2v symmetrical structure are located as stable minima on the potential energy surfaces of NH(sub 6)(super 3+), PH(sub 6)(super 3+) and AsH6(sub 6)(super 3+).