Ferrocene – Metallocene with Sandwich Structure

Ferrocene (CAS 102-54-5): Overview

1. Chemical Structure and Discovery

The unique geometry of ferrocene was first elucidated in the 1950s, when X-ray diffraction data confirmed the parallel arrangement of cyclopentadienyl rings coordinated to Fe(II). This discovery laid the foundation for a new branch of organometallic chemistry.

2. Properties

Molecular weight: ~186.04 g/mol

Melting point: ~173°C

Solubility: Soluble in benzene, ethers, chlorinated hydrocarbons; does not ionize in water

Thermal stability: Withstands heating up to 400°C without significant decomposition

Appearance: Bright orange crystalline powder

3. Practical Applications

Catalytic processes: Ferrocene derivatives are used in olefin polymerization and as catalyst precursors.

Electronics: Employed as a potential-stabilizing component in battery electrolytes.

Biomedicine: Ferrocene-based compounds are being synthesized for research into anticancer properties.

Fuel additives: Used as an antiknock agent and combustion improver.

Electrochemistry: Serves as a reliable internal standard in cyclic voltammetry.

4. Safety and Handling

The substance exhibits low toxicity; however, at high concentrations, it may cause mucous membrane irritation. Storage: glass or metal containers, dry and dark conditions; prevent dust formation.

5. Conclusion

Ferrocene (CAS 102-54-5) became the foundation of an entire branch of organometallic chemistry, serving as the classic “sandwich” compound. Its derivatives offer a variety of functional groups and find applications in catalytic reactions, electrochemical systems, and the synthesis of new polymers.