A Heterobimetallic Anionic 3,6-Connected 2D Coordination Polymer Based on Nitranilate as Ligand

Area of Science:

• Coordination chemistry
• Materials science
• Magnetism

Background:

• The synthesis of novel coordination polymers is crucial for developing materials with unique structural and magnetic properties.
• Anilate ligands, such as 2,5-dihydroxy-1,4-benzoquinone (H₂C₆O₄²⁻), are versatile building blocks in coordination chemistry.

Purpose of the Study:

• To synthesize new coordination polymers with original architectures and interesting magnetic properties.
• To explore the structural and magnetic characteristics of a novel heterometallic coordination polymer.

Main Methods:

• Utilized the nitranilate ligand (C₆N₂O₈²⁻) in the synthesis of coordination polymers.
• Characterized the resulting compound, [(DAMS)₂{FeNa(C₆N₂O₈)₃}·CH₃CN] (1), using structural and magnetic analyses.

Main Results:

• A novel 2D heterometallic coordination polymer, [(DAMS)₂{FeNa(C₆N₂O₈)₃}·CH₃CN] (1), was synthesized, featuring an unprecedented structure for anilato-based compounds.
• The structure is a 3,6-connected 2D coordination polymer based on a honeycomb hexagonal framework, incorporating alternating Fe(III) ions and Na⁺ dimers, with a central [Fe(C₆N₂O₈)₃]³⁻ anion.
• Magnetic studies revealed the presence of paramagnetic isolated high spin Fe(III) complexes exhibiting a zero-field splitting of |D| = 8.5 cm⁻¹.

Conclusions:

• The nitranilate ligand facilitates the construction of novel 2D heterometallic coordination polymers with unique architectures.
• The synthesized compound demonstrates interesting magnetic properties arising from isolated high spin Fe(III) centers.