A neutral organometallic fluoro complex can be a good ligand

Area of Science:

• Organometallic Chemistry
• Coordination Chemistry
• Inorganic Synthesis

Background:

• Molybdenum complexes with triflate ligands are versatile precursors in organometallic synthesis.
• Fluoride ligands significantly influence the electronic properties of metal centers.

Purpose of the Study:

• To synthesize and characterize novel molybdenum-fluoride complexes.
• To investigate the formation of homobinuclear and heterobinuclear complexes bridged by fluoride.
• To explore the electronic effects of fluoride ligands on molybdenum centers.

Main Methods:

• Reaction of a molybdenum precursor with tetrabutylammonium fluoride trihydrate.
• Synthesis of homobinuclear and heterobinuclear complexes via fluoride bridging.
• Characterization using IR, NMR spectroscopy, and X-ray diffraction analysis.

Main Results:

• A new fluoride complex [MoF(eta(3)-C(3)H(4)-Me-2)(CO)(2)(phen)] (2) was synthesized.
• Homobinuclear complex [[Mo(eta(3)-C(3)H(4)-Me-2)(CO)(2)(phen)](2)(mu-F)][OTf] (3) and heterobinuclear complexes [[Mo(eta(3)-C(3)H(4)-Me-2)(CO)(2)(phen)](mu-F)[M(CO)(3)('N--N')]][BAr'(4)] (4, 5) were obtained.
• The electron-rich nature of the molybdenum center in compound 2 was confirmed.

Conclusions:

• The successful synthesis of novel molybdenum-fluoride complexes demonstrates the utility of fluoride as a bridging ligand.
• The electronic properties of the metal center are modulated by the presence of fluoride.
• This work expands the scope of binuclear organometallic compounds.