Crystalline heaviest pnictogen-dipyrromethenes: isolation, characterization, and reactivity

The heaviest pnictogen-dipyrromethenes DPMPnCl(2) (Pn = Sb, 3; Bi 4), which are direct analogues of boron-dipyrromethene (BODIPY), have been readily prepared and isolated as crystalline solids. Both compounds display green photoluminescence with small full widths at half maximum in toluene. Moreover, the reduction of 3 with sodium metal afforded the cyclic dicoordinate stibinidene 5.

Automated summary

The heaviest pnictogen-dipyrromethenes DPMPnCl(2) (Pn = Sb, 3; Bi 4), which are analogous to boron-dipyrromethene (BODIPY), were successfully synthesized and obtained as crystalline solids. Both compounds exhibit green photoluminescence with narrow full widths at half maximum in toluene. Additionally, the reduction of compound 3 with sodium metal resulted in the formation of cyclic dicoordinate stibinidene 5.