Structural studies of oxygen-bridged iron compounds

Area of Science:

• Inorganic Chemistry
• Crystallography
• Coordination Chemistry

Background:

• Iron complexes with dioxime and phenylborate ligands are of interest due to their potential catalytic and magnetic properties.
• Understanding the structural nuances of these complexes is crucial for designing new materials.

Purpose of the Study:

• To elucidate the detailed crystal structures of two novel diiron complexes.
• To investigate the impact of different bridging ligands (methoxide vs. hydroxide) on the overall structure and coordination.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the molecular and crystal structures of both compounds.
• Analysis of bond lengths, coordination geometry, and hydrogen-bonding patterns.

Main Results:

• Compound (I) features a methoxide bridge between two iron centers, with chloride ligands in axial positions.
• Compound (II) exhibits a hydroxide bridge, differing from Compound (I), and includes solvent molecules (acetonitrile).
• Structural analysis indicates protonation of a bridging borate oxygen in Compound (II), influencing hydrogen bonding.

Conclusions:

• The study successfully characterized two distinct diiron complexes, revealing structural variations based on the bridging ligand.
• The findings provide insights into the coordination chemistry of iron with dioxime and phenylborate moieties.
• The observed structural differences and hydrogen-bonding patterns offer a basis for further investigations into structure-property relationships.