A bipyridyl thorium metallocene: synthesis, structure and reactivity.

Area of Science:

• Organometallic Chemistry
• Thorium Chemistry
• Coordination Chemistry

Background:

• Thorium metallocenes are of interest due to their unique electronic properties and potential applications.
• The development of novel organothorium complexes with tailored reactivity is crucial for advancing catalysis and materials science.

Purpose of the Study:

• To synthesize and characterize a novel bipyridine thorium metallocene.
• To investigate the reactivity of the synthesized complex with various electrophiles and small molecules.
• To explore the formation of new thorium-containing compounds with diverse bonding arrangements.

Main Methods:

• Synthesis of the bipyridine thorium metallocene via reduction of a thorium chloride precursor.
• Characterization using spectroscopic techniques (NMR, IR), elemental analysis, and X-ray diffraction.
• Reactivity studies involving reactions with trityl chloride, silver halides, diphenyl diselenide, and carbon disulfide.

Main Results:

• Successful synthesis and full characterization of the purple bipyridine thorium metallocene, [η(5)-1,3-(Me(3)C)(2)C(5)H(3)](2)Th(bipy).
• Demonstrated reactivity towards halide and selenido sources, yielding corresponding thorium halide and selenido metallocenes.
• Observed cleavage of the carbon-sulfur bond in carbon disulfide, leading to sulfido and trithiocarbonate thorium complexes.

Conclusions:

• The novel bipyridine thorium metallocene serves as a versatile precursor for synthesizing a range of organothorium compounds.
• The reactivity studies highlight the potential of this complex in forming new thorium-sulfur and thorium-halide bonds.
• This research contributes to the understanding of thorium metallocene chemistry and opens avenues for further exploration.