title: Donor-Acceptor Stabilized Tetra(silanimine).
abstract: The synthesis of an oligo(silanimine) is described. The reaction of the amidinato silylene [LSiN(SiMe3)2] (1, L = PhC(NtBu)2) with SiI4in toluene afforded a mixture of the silanimine [LSi(I)NSiI3] (2), SiMe3I, and Si2I6. The mechanistic studies showed that 1 reacts with SiI4to form the silyl ionic intermediate "{LSi(I)N(SiMe3)2}+{SiI3}-", which then eliminates SiMe3I and "SiI2" to form the silanimine intermediate "LSi(I)NSiMe3". It further undergoes a substitution with another molecule of SiI4to form a mixture of 2 and SiMe3I. In addition, "SiI2" undergoes an oxidative addition with SiI4to form Si2I6. Subsequently, compound 2 reacted with [LiN(SiMe3)Ar] to form the silanimine [LSi(I)NSiI2N(SiMe3)Ar] (6, Ar = 2,6-iPr2C6H3), which was then treated with KC8to give the donor-acceptor stabilized tetra(silanimine) [LSiN(SiMe3)SiNAr]2(7). It comprises four formal silanimine ">Si═N-" units, which are linked together. Compounds 2, 6, and 7 were characterized by NMR spectroscopy and X-ray crystallography.
authors.affiliation: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , 637371 Singapore.
authors.forename: Yu-Liang
authors.initials: YL
authors.lastname: Shan
authors.affiliation: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , 637371 Singapore.
authors.forename: Bi-Xiang
authors.initials: BX
authors.lastname: Leong
authors.affiliation: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , 637371 Singapore.
authors.forename: Yongxin
authors.initials: Y
authors.lastname: Li
authors.affiliation: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , 637371 Singapore.
authors.forename: Rakesh
authors.initials: R
authors.lastname: Ganguly
authors.affiliation: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , 637371 Singapore.
authors.forename: Cheuk-Wai
authors.identifier: http://orcid.org/0000-0003-4816-9801
authors.initials: CW
authors.lastname: So