Issue 20, 2016

Stepwise isolation of an unprecedented silylene supported dinuclear gold(i) cation with aurophilic interaction

Abstract

The silylene (PhC(NtBu)2SiN(PPh2)(2,6-iPr2-C6H3)) (2) was prepared from the previously reported (PhC(NtBu)2SiCl) salt elimination method. The reaction of 2 with AuCl(SMe2) afforded [(PhC(NtBu)2SiN(PPh2)(2,6-iPr2-C6H3))AuCl] (3). Note here that only Si(II) is coordinated to Au(I), while P(III) remains uncoordinated. The higher negative value of the electrostatic potential (ESP) at the Si-centre (−28.8 kcal mol−1) as compared to that at the P-centre (−15.3 kcal mol−1) justifies this observation. Furthermore, the chloride abstraction from 3 by AgSbF6 led to the formation of a dinuclear Au(I) cationic complex, [PhC(NtBu)2Si(2,6-iPr2-C6H3NPPh2)(Au)]2[SbF6]2 (4), which displays an intra-molecular Au⋯Au interaction of 2.865 Å.

Graphical abstract: Stepwise isolation of an unprecedented silylene supported dinuclear gold(i) cation with aurophilic interaction

Supplementary files

Article information

Article type
Communication
Submitted
21 Jan 2016
Accepted
02 Feb 2016
First published
02 Feb 2016

Chem. Commun., 2016,52, 3880-3882

Stepwise isolation of an unprecedented silylene supported dinuclear gold(I) cation with aurophilic interaction

S. Khan, S. Pal, N. Kathewad, I. Purushothaman, S. De and P. Parameswaran, Chem. Commun., 2016, 52, 3880 DOI: 10.1039/C6CC00597G

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