Isolation of a Cationic Platinum(II) σ-Silane Complex.

Area of Science:

• Organometallic Chemistry
• Silane Chemistry
• Platinum Complexes

Background:

• Tertiary silanes are versatile reagents in organometallic chemistry.
• Platinum complexes are known for their catalytic activity and unique coordination chemistry.
• Understanding metal-silane interactions is crucial for developing new synthetic methodologies.

Purpose of the Study:

• To synthesize and characterize novel platinum(II) σ-SiH complexes.
• To investigate the coordination mode of silanes to platinum.
• To explore the stability and reactivity of these platinum-silane adducts.

Main Methods:

• Synthesis of platinum complexes
• Characterization using X-ray diffraction
• Density Functional Theory (DFT) calculations
• Electronic Topological Analysis (ETA)

Main Results:

• Formation of stable mononuclear platinum(II) σ-SiH complexes at low temperatures.
• Full characterization, including X-ray diffraction, confirming the η1-SiH coordination.
• DFT calculations support the unusual η1-SiH coordination mode.
• Low energy barrier for η2-SiH formation and facile Si-H cleavage at room temperature.

Conclusions:

• The study reports the first examples of platinum(II) σ-SiH complexes.
• The coordination is confirmed as an unusual η1-SiH, supported by computational analysis.
• These complexes are prone to Si-H bond cleavage, forming more stable silyl species at room temperature.