Khan Shabana, Pal Shiv, Kathewad Neha, Purushothaman Indu, De Susmita, Parameswaran Pattiyil
Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhaba Road, Pashan, Pune - 411008, India.
Chem Commun (Camb). 2016 Mar 11;52(20):3880-2. doi: 10.1039/c6cc00597g. Epub 2016 Feb 9.
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.
