Short-Range Intermolecular Forces. II. H2–H2 and H2–H

Abstract

The energy of interaction between two hydrogen molecules and between a hydrogen atom and a hydrogen molecule are calculated using a new method¹ for approximating the 3‐ and 4‐center integrals. The results are in good agreement with previous calculations of Margenau and with existing experimental data. The multiple exchange and zeroeth order perturbation make our calculations somewhat complicated. Although good results were obtained by de Boer, who neglected these terms, the success of such a procedure depends on a fortuitous cancellation of errors. Following de Boer's procedure for the case of a hydrogen atom‐hydrogen molecule interaction, we obtained very poor results.