Tricarbon-yl(η-flavone)chromium(0).

Area of Science:

• Organometallic Chemistry
• Crystallography
• Coordination Chemistry

Background:

• Flavonoids are a diverse class of plant secondary metabolites with various biological activities.
• Organometallic complexes containing transition metals offer unique catalytic and material properties.

Purpose of the Study:

• To synthesize and characterize a novel organometallic compound featuring a chromium tricarbonyl unit coordinated to a flavone ligand.
• To elucidate the molecular structure and crystal packing of the [Cr(C(15)H(10)O(2))(CO)(3)] complex.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the precise three-dimensional structure of the compound.
• Analysis of bond lengths, bond angles, and dihedral angles provided insights into the coordination geometry and ligand conformation.

Main Results:

• The chromium tricarbonyl moiety adopted a three-legged piano-stool conformation around the chromium center.
• The flavone ligand exhibited near-planarity, with small dihedral angles between its constituent rings.
• Intermolecular interactions in the crystal lattice were dominated by π-π stacking between adjacent flavone ligands.

Conclusions:

• The study successfully characterized the organometallic complex [Cr(C(15)H(10)O(2))(CO)(3)], revealing its distinct coordination geometry and ligand arrangement.
• The observed molecular packing, featuring π-π stacking, suggests potential for self-assembly and supramolecular chemistry applications.