Flexible coordination of hetero-scorpionate ligands composed of pyrrole/pyridines hybrid in rhenium(I) tricarbonyl complexes

Rhenium(I) coordination of hetero-scorpionate ligands composed of pyrrole/pyridines hybrid with four coordination sites on a single carbon atom afforded a variety of rhenium(I) tricarbonyl complexes. X-ray analyses on the rhenium(I) complexes revealed the flexible coordination of such hetero-scorpionate ligands. Presence of an additional coordinative site adjacent to the tridentate ligands lead to a unique supramolecular complex, anion recognizing complex, and bis-metal complex.