No abstract

As a variation of the commonly used bipy ligand in Re(CO) 3 chemistry, a series of structurally related complexes in which bipy is replaced by pyridine-triazole ligands (or pyta) bearing a pendant acetyl group on the triazole ring were prepared efficiently by the click chemistry approach. Depending on the nature of the pendant arm, different Re I complexes were obtained. Surprisingly, starting from the ligand with unprotected acetyl group yielded two structural isomers of Re(CO) 3 dimeric species. One isomer (compound 5a) was iso-