Dipyrrin Zn(II) complexes with functional aryl groups: formation, characterization, and structures in the solid state.

Formation and characterization by single-crystal X-ray analyses of Zn(II) complexes of various dipyrrins (dipyrromethenes) have been reported. Apart from the ordinary [2+1]-type complexes of aryl-substituted dipyrrins, imidazole-substituted derivative yields the "slipped double-decker" [2+2]-type complexes by using Zn(II) halides.