“…[4][5][6][7] Another remarkable recent achievementi st he activationo fd ihydrogen by 2,4,6-tri-tert-butyl-1,3,5-triphosphabenzene,w hich proceeds withoutt ransitionm etals. [8] Moreover, p-conjugated six-membered phosphorus heterocycles [9][10][11] as well as non-aromatic five-membered rings, such as phospholesa nd their derivatives (e.g.,o xides, sulfides, transition metal complexes), are being extensively investigated as precursors or components of optoelectronic materials,s uch as organicl ight-emitting diodes, organic semiconductors, and organic solar cells. [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] Azadiphospholes [28] are aromatic and electron-rich heterocycles, [29,30] which eventually may find applications in organic electronic materials, for example, as electron donors (n-dopants).…”