Publication: A neutral vicinal silylene/phosphane supported six-membered C
2
PSiAu
2
ring and a silver(
i
) complex
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Date
2022
Authors
Herbst-Irmer, Regine
Stalke, Dietmar
Roesky, Herbert W.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
We report on the hybrid bidentate silylene and phosphane ligand (1) stabilized Au which are capable of forming a gold containing six-membered ring (2). 2 exhibits an intramolecular aurophilic interaction, which is supported by DFT calculations.
This work presents the different coordination nature of the bidentate ligand towards gold and silver complexes. The reaction of 1 with AuClSMe 2 in dichloromethane resulted in two gold atoms containing six-membered ring PhC(N
t
Bu)
2
Si–Au⋯Au–PPh
2
C
6
H
4
(2). Compound 2 exhibits intramolecular aurophilic interaction (2.9987(7) Å), which is further supported by quantum chemical calculations. Moreover, the reduction of aluminium adduct 3 with AgSbF
6
affords insertion of silver cation [{PhC(N
t
Bu)
2
SiF
2
}-C
6
H
4
(PPh
2
)-Ag-(PPh
2
)C
6
H
4
{PhC(N
t
Bu)
2
SiF
2
}]AlCl
4
−
(4) between two phosphane. In compound 4 only two P(
iii
) of two molecules of 1 coordinates to Ag(
i
), while two Si(
ii
) remains uncoordinated and gives oxidative addition of Fluorine.