High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! The hydrogen molecular ion, dihydrogen cation, or H2+, is the simplest molecular ion. It is composed of two positively-charged protons and one negatively- charged electron, and can be formed from ionization of a neutral hydrogen molecule. It is of great historical and theoretical interest because, having only one electron, the Schrodinger equation for the system can be solved in a relatively straightforward way due to the lack of electron–electron repulsion (electron correlation). The analytical solutions for the energy eigenvalues are a generalization of the Lambert W function (see Lambert W function and references therein for more details on this function). Thus, the case of clamped nuclei can be completely done analytically using a Computer algebra system. Consequently, it is included as an example in most quantum chemistry textbooks.

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