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Of or pertaining to a biradical

Figure 2. Change of basis from delocalized molecular orbital basis to localized atomic orbital basis. Reprinted with permission from Chem. Rev. 2023, 123, 16, 10468–10526. Copyright 2023 American Chemical Society.

A biradical having a set of partially unpaired electrons

Figure 1. The occupation of 2 orbitals with 2 electrons results in 6 different electronic configurations. These configurations need to be considered to describe the singlet and triplet states of a diradical species.

Of or pertaining to a biradical

Figure 3. The ring inversion of bicyclobutane is proposed to involve a biradical transition state in which the transannular C-C bond is broken.