Introducing of an Unexplored Aza-BODIPY Diradicaloids with 4-(2,6-Di-butyl)phenoxyl Radicals Located in 1,7-Positions of the Aza-BODIPY Core.

We have prepared and characterized two diradicaloid systems and that originated from the oxidation of a 1,7-(4-(2,6-di--butyl)phenol)-substituted aza-BODIPY core. The aza-BODIPY diradicaloids were characterized by a large array of experimental and computational methods. The diamagnetic closed-shell state was postulated as the ground state in solution and a solid-state with the substantial thermal population originating from both open-shell diradical and open-shell triplet states observed at room temperature.