The electron density while in the antibonding molecular orbital while in the internuclear location is very low, Therefore the nuclei are immediately exposed to one another. As a result, the nuclei are much less shielded from one another. Before describing the research in Wakefield's 1998 paper inside the Lancet, at https://wakefield16546.blogdeazar.com/29869687/the-fact-about-mot-that-no-one-is-suggesting