An unprecedented lanthanide phosphinidene halide: synthesis, structure and reactivity

Area of Science:

• Organometallic Chemistry
• Inorganic Chemistry
• Lanthanide Chemistry

Background:

• Lanthanide complexes are crucial in catalysis and materials science.
• Phosphinidene species are rare and highly reactive intermediates.
• Understanding their coordination chemistry is key to unlocking new reactivity.

Purpose of the Study:

• To synthesize and characterize a novel lanthanide phosphinidene complex.
• To investigate the reactivity of the phosphinidene moiety.
• To explore the structural and electronic properties of lanthanide-phosphorus bonds.

Main Methods:

• Synthesis of the lanthanide phosphinidene complex via a multi-step procedure.
• Single-crystal X-ray diffraction for structural determination.
• Spectroscopic techniques (NMR, IR) for characterization.

Main Results:

• Successfully synthesized and structurally characterized an unprecedented dimeric lanthanide phosphinidene species, [(THF)(3)(I)Nd(mu-PC(6)H(3)-2,6-(i)Pr(2))](2).
• The phosphinidene ligand bridges two neodymium centers.
• The phosphinidene moiety demonstrated carbene-like reactivity in subsequent reactions.

Conclusions:

• The study reports the first structurally characterized lanthanide phosphinidene complex.
• The phosphinidene ligand behaves as a carbene, showcasing unique reactivity.
• This discovery expands the known chemistry of lanthanides and low-coordinate phosphorus species.