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A Genuine Stannylone with a Monoatomic Two-Coordinate Tin(0) Atom Supported by a Bis(silylene) Ligand.

ABSTRACT: The monoatomic zero-valent tin complex (stannylone) {[Si^II (Xant)Si^II ]Sn⁰ } 5 stabilized by a bis(silylene)xanthene ligand, [Si^II (Xant)Si^II =PhC(NtBu)₂ Si(Xant)Si(NtBu)₂ CPh], and its bis-tetracarbonyliron complex {[Si^II (Xant)Si^II ]Sn⁰ [Fe(CO)₄ ]₂ } 4 are reported. The stannylone 5 bearing a two-coordinate zero-valent tin atom is synthesized by reduction of the precursor 4 with potassium graphite. Compound 4 results from the Sn^II halide precursor {[Si^II (Xant)Si^II ]Sn^II Cl}Cl 2 or {[Si^II (Xant)Si^II ]SnBr₂ } 3 through reductive salt-metathesis reaction with K₂ Fe(CO)₄ . According to density functional theory (DFT) calculations, the highest occupied molecular orbital (HOMO) and HOMO-1 of 5 correspond to a π-type lone pair with delocalization into both adjacent vacant orbitals of the Si^II atoms and a σ-type lone pair at the Sn⁰ center, respectively, indicating genuine stannylone character.

SUBMITTER: Xu J

PROVIDER: S-EPMC9300062 | biostudies-literature |

REPOSITORIES: biostudies-literature

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