Cation-Triggered Stannate(II)/Stannylenoid/Stannylene Conversion

Area of Science:

• Organometallic Chemistry
• Silicon-Tin Chemistry
• Coordination Chemistry

Background:

• Dipotassio-tetrasilan-1,4-diide serves as a precursor for novel silicon-containing compounds.
• Tin(II) chloride is a versatile reagent in synthesizing organotin compounds.

Purpose of the Study:

• To synthesize and characterize novel cyclic chlorostannylenes.
• To investigate the Lewis basicity of synthesized stannylenes.
• To explore the reactivity of these compounds with metal carbonyls.

Main Methods:

• Low-temperature reaction of dipotassio-tetrasilan-1,4-diide with SnCl2.
• Cation exchange reactions using Na2[B12Cl12] and Li[Al(OC(CF3)3)4].
• Density Functional Theory (DFT) calculations and Nuclear Magnetic Resonance (NMR) spectroscopy.
• Synthesis of iron carbonyl complexes.

Main Results:

• Formation of a five-membered cyclic potassio chlorostannate(II).
• Synthesis of sodium chlorostannylenoid and a non-stabilized cyclic bissilylstannylene.
• Analysis confirmed increasing Lewis basicity of the bissilylstannylene.
• Successful synthesis of iron carbonyl complexes from the chlorostannate and stannylene.

Conclusions:

• Novel cyclic chlorostannylenes and bissilylstannylenes were successfully synthesized.
• The electronic properties, specifically Lewis basicity, were elucidated.
• The reactivity of these tin compounds was demonstrated through complex formation.