Tetra-Cationic Distibane Stabilized by Bis(α-iminopyridine) and Its Reactivity.

The work establishes the salt of a tetra-cationic distibane, [LSb][CFSO] = [][OTf] (CFSO = OTf), stabilized by a bis(α-iminopyridine) ligand , defying the Coulombic repulsion. The synthetic approach involved a dehydrocoupling reaction when a mixture of and Sb(OTf) in a 1:1 ratio was treated with EtSiH/LiBEtH as the hydride source. Compound [][OTf] was also achieved from [LSbCl][OTf] as a precursor and using EtSiH.

Coordination Chemistry of the Antimony(III) and Bismuth(III) Cations using Bis(α-iminopyridine) as Ligand.

Bis(alpha-iminopyridine) L has been employed as the redox non-innocent Schiff-base ligand to coordinate with cationic antimony(III) and bismuth(III) centers. Mono- and di- cationic compounds: [LSbCl ][CF SO ] 1, [LBiCl ][CF SO ] 2, [LSbCl ] [Sb Cl ] 3, [LBiCl ] [Bi Cl ] 4, [LSbCl][CF SO ] 5, [LBiCl][CF SO ] 6 have been isolated and characterized using single crystal X-ray crystallography in the solid-state and solution-state NMR studies. These compounds have been prepared from PnCl (Pn=Sb, Bi) and chloride abstracting agent such as Me SiCF SO or AgCF SO in the presence of L.