Hybrid Macrocycles of Subporphyrins and Triphyrins.

The dibenzofuran/dibenzothiophene-based nonaromatic hybrid macrocycles, exhibiting the features of both contracted macrocycles, subporphyrins and triphyrins, have been synthesized under simple reaction conditions using readily available precursors. The monoanionic new macrocyclic ligands with three donor atoms, such as two pyrrole nitrogens and one dibenzofuran oxygen or dibenzothiophene sulfur, readily form Re(I) complexes.