Tris(η-cyclo-penta-dien-yl)hafnium(III)

Area of Science:

• Organometallic Chemistry
• Inorganic Chemistry
• Crystallography

Background:

• Organometallic compounds containing early transition metals are crucial in catalysis and materials science.
• Understanding the coordination chemistry of hafnium is essential for developing new applications.
• The synthesis and structural characterization of novel hafnium complexes provide fundamental insights into metal-ligand bonding.

Purpose of the Study:

• To determine the precise crystal structure of the title compound, tris(cyclopentadienyl)hafnium(III).
• To elucidate the coordination geometry and bonding environment around the hafnium(III) center.
• To investigate the molecular symmetry and packing in the solid state.

Main Methods:

• Single-crystal X-ray diffraction was employed to collect diffraction data.
• The crystal structure was solved and refined using established crystallographic software.
• Analysis of bond lengths, bond angles, and symmetry elements provided structural details.

Main Results:

• The crystal structure of [Hf(C5H5)3] was successfully determined.
• Three cyclopentadienyl ligands coordinate to the hafnium(III) atom.
• The complex adopts a trigonal-planar geometry around the hafnium center, lying on a sixfold inversion axis.

Conclusions:

• The trigonal-planar coordination geometry around Hf(III) in [Hf(C5H5)3] is confirmed.
• The molecule exhibits high symmetry, residing on a sixfold inversion axis.
• This structural characterization contributes to the understanding of organohafnium compounds.