Lanthanocene and Cerocene Alkyl Complexes: Synthesis, Structure, and Reactivity Studies

Area of Science:

• Organometallic Chemistry
• Lanthanide Chemistry
• Coordination Chemistry

Background:

• Lanthanocene and cerocene alkyl complexes serve as versatile precursors in organometallic synthesis.
• Understanding the reactivity of these complexes with small molecules is crucial for developing new lanthanide-based materials and catalysts.

Purpose of the Study:

• To synthesize novel lanthanocene and cerocene alkyl complexes.
• To investigate the reactivity of these complexes with various small molecules, including chalcogens and nitriles.
• To characterize the resulting lanthanide derivatives and elucidate their structures.

Main Methods:

• Salt metathesis reactions were employed to synthesize the lanthanocene and cerocene alkyl complexes.
• Reactions with elemental sulfur, selenium, benzonitrile, N,N'-dicyclohexylcarbodiimide, and phenyl isothiocyanate were performed.
• Characterization involved spectroscopic methods (NMR, IR, Mass Spectrometry) and single-crystal X-ray diffraction analysis.

Main Results:

• Lanthanocene and cerocene alkyl complexes were successfully synthesized.
• Reactions with chalcogens yielded lanthanide thiolates, selenolates, disulfides, and diselenides.
• Reactions with nitriles and isothiocyanates produced 1-azaallyl, amidine, and thioamidato complexes.

Conclusions:

• The synthesized lanthanocene and cerocene alkyl complexes exhibit diverse reactivity with small molecules.
• This study provides access to a range of novel lanthanide derivatives with potential applications in catalysis and materials science.
• The structural characterization confirms the formation of unique organolanthanide compounds.