(The Journal of Chemical Physics, 1997) Barron, Joshua Robert; Kelley, Amy R.; Liu, Ruifeng
Contrary to previous ab initio and semi-empirical studies, density functional theory and high level
ab initio calculations predict that the ground state of NiH2 is a bent singlet state. The linear triplet
3 ii g state, predicted as the ground state by all previous ca lculations, is found a few kcal/mo! higher.