591749-71-2Relevant academic research and scientific papers
Tin-centered radical and cation: Stable and free
Sekiguchi, Akira,Fukawa, Tomohide,Lee, Vladimir Ya.,Nakamoto, Masaaki
, p. 9250 - 9251 (2007/10/03)
The first stable stannyl radical (tBu2MeSi)3Sn?(1) has been synthesized by the reaction of tBu2MeSiNa with SnCl2-dioxane in diethyl ether. The X-ray crystal structure and electron paramagnetic resonance (EPR) data of this radical show that 1 has a planar geometry, being a π-radical in both the solid and the liquid states. One-electron oxidation of 1 with Ph3C+·B(C6F5)4- in benzene quantitatively produced the corresponding cation (tBu2MeSi)3Sn+·B(C6F5)4- (2), representing the stable free stannylium ion that has been fully characterized by X-ray analysis and NMR data. Being free, 2 features a record downfield shifted resonance for stannylium ions: +2653 ppm. Copyright
