We further explore and expand this class by computing several azupyrene and pyrene analogs with saturated bridges, of which many have been synthesized. We only find a few of these to exhibit excited-state Hund's rule violations. These are shown in Figure , while several substituted versions we have tested obey Hund's rule and are listed Table . For example, while the diaza-azupyrene shown in Figure is a Hund's rule violation, the pyrene analog distorts and does not exhibit a Hund's rule violation in its first excited singlet state (Figure , bottom).