ChemInform Abstract: Helium Bonding in Singly and Doubly Charged First-Row Diatomic Cations HeXn+ (X: Li-Ne; n = 1, 2).

Ab initio calculations are performed for the electronic ground states and selected excited states of HeXn+ and the calculated bonding properties are discussed in terms of donor-acceptor interactions between neutral He as the donor and the Xn+ cation as the acceptor.