Synthesis of rhenium-based M2LL′-type supramolecular coordination complexes from flexible ligands

Neutral heteroleptic M2LLʹ-type supramolecular co-ordination complexes were synthesized in a one-step process using a tritopic fac-Re(CO)3 acceptor, dianionic flexible bis(chelating) oxygen donors, and neutral flexible bis(monodentate) nitrogen donors. Two flexible ligands and two fac-Re(CO)3 cores make up the cyclic framework. Complexes 1, and 2 were characterized by E.A., IR, UV-Vis spectroscopy and X-ray study.