(Z)-3-Ferrocenyl-2-phenyl-acrylonitrile

Area of Science:

• Organometallic Chemistry
• Crystallography
• Materials Science

Background:

• Organometallic compounds containing iron and cyclopentadienyl ligands are fundamental in catalysis and materials science.
• Understanding the precise three-dimensional structure of such compounds is key to predicting their chemical behavior.
• Structural disorder can significantly influence the physical and chemical properties of molecules.

Purpose of the Study:

• To elucidate the crystal structure of the iron compound [Fe(C5H5)(C14H10N)].
• To characterize the nature and extent of disorder within the cyclopentadienyl ring.
• To determine the spatial relationships between the ligand components.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the molecular structure.
• Crystallographic analysis was used to model the disordered cyclopentadienyl ring.
• Geometric parameters, including dihedral angles, were precisely calculated.

Main Results:

• The unsubstituted cyclopentadienyl (Cp) ring exhibits positional disorder, distributed over two sites with occupancy factors of 0.76(2) and 0.24(2).
• Small dihedral angles (0.9(5)° and 6(2)°) were observed between the substituted Cp ring and the disordered Cp ring components.
• The acrylonitrile unit displays dihedral angles of 6.1(18)° and 6.5(4)° relative to the substituted Cp and phenyl rings, respectively.

Conclusions:

• The determined crystal structure provides a detailed atomic-level understanding of the iron complex.
• The observed disorder in the Cp ring offers insights into the dynamic behavior and potential fluxionality of the molecule.
• These findings contribute to the structure-property relationships in organometallic iron compounds.