What question did this study set out to answer?

This research aims to synthesize and characterize novel silyl-substituted stannylenes and their use in forming gold complexes.

March 21, 2026Open Access

Homo- and Heteroleptic Silylstannylenes: Synthesis, Structure and Use as Precursors to Bimetallic Compounds

Key Points

This research aims to synthesize and characterize novel silyl-substituted stannylenes and their use in forming gold complexes.
Synthesis of novel silyl-substituted stannylenes and characterization via structural analysis.
Insertion experiments with stannylenes into Au–Cl and Au–I bonds.
Iodide abstraction under specific conditions to yield cationic complexes.
Two new stannylenes were synthesized, including a rare homoleptic disilyl stannylene.
Both stannylenes were shown to effectively insert into gold complexes.
The cationic complex formed is the first example of a simple stannylene ligand bound to a gold center.

Abstract

Two novel silyl-substituted stannylenes are reported: ArMesSnSi (SiMe3) 2 (SitBuPh2) (ArMes = 2, 6-Mes2C6H3, Mes = 2, 4, 6-Me3C6H2) and SnSi (SiMe3) 2 (SitBuPh2) 2, the latter representing a very rare example of a homoleptic disilyl stannylene Together with the known stannylene ArMesSnSi (SiMe3) 3, these systems are each shown to insert into the Au–Cl bond of (Ph3P) AuCl to form complexes of the type (Ph3P) Au (SnR2Cl) containing four coordinate stannyl ligands (where R = aryl or silyl group). Similar behavior is shown toward (Cy3P) AuI, yielding crystalline (Cy3P) AuSnI (ArMes) (Si (SiMe3) 3) in the case of ArMesSnSi (SiMe3) 3. Subsequent iodide abstraction to yield (Cy3P) AuSn (ArMes) (Si (SiMe3) 3) + can be achieved using LiAl (ORf) 4 (Rf = −C (CF3) 3), facilitated by the long tin–halide bond and strongly electron-donating tertiary phosphine ligand. This cationic complex represents the first structurally characterized example of a simple (two-coordinate) stannylene ligand bound to a gold center in a manner analogous to classical Au (I) carbene complexes.

Read Full Paperexternally

KI fragen

Bookmark

View Full Paper