title: 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.
authors: Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhaba Road, Pashan, Pune - 411008, India. shabana@iiserpune.ac.in.
authors: Shabana
authors: S
authors: Khan
authors: Shiv
authors: S
authors: Pal
authors: Neha
authors: N
authors: Kathewad
authors: Indu
authors: I
authors: Purushothaman
authors: Susmita
authors: S
authors: De
authors: Pattiyil
authors: P
authors: Parameswaran
mesh_terms: D002412:Cations / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D050607:Organogold Compounds / Q000138:chemical synthesis / Q000737:chemistry* / Q000302:isolation & purification*; D017646:Organosilicon Compounds / Q000737:chemistry*
chemical_list: D002412:Cations; D050607:Organogold Compounds; D017646:Organosilicon Compounds; D006046:Gold