Monoradical-containing four-coordinate Co(iii) complexes: homolytic S-S and Se-Se bond cleavage and catalytic isocyanate to urea conversion under sunlight.

Four-coordinate, monoradical-containing Co(iii) complexes participated in the non-innocent ligand driven homolytic cleavage of S-S and Se-Se bonds and catalyzed the conversion of RNCO (R = phenyl and naphthyl) to the corresponding urea derivatives (TON 480) in dry CHCl under sunlight stimulus.