Synthesis and characterization of tricarbonyl–molybdenum complexes bearing monoaza-trithia-macrocyclic ligands

Novel tricarbonyl–molybdenum complexes bearing monoaza-trithia-macrocyclic ligands (LXR), [Mo(CO)3(LXR)] (X = 12 or 14, R = H), and [Mo(CO)3(L14Py)Mo(CO)4] have been synthesized to gain an understanding of the unique properties of macrocyclic ligands. X-ray structure analysis of [Mo(CO)3(L14H)] has revealed that intra- and intermolecular hydrogen bonds existed and these interaction regulated CO bond lengths. In addition, vibrational spectroscopy indicates that a specific hydrogen bonding interaction affects the strength of the binding of carbon monoxide molecules to the metal. In case of using L14Py, it is expected that dinuclear molybdenum complex was generated.