Synthesis of a new stable, neutral organothulium(ii) complex by reduction of a thulium(iii) precursor

Abstract

The new stable, neutral Tm^II complex (Cp^ttt)₂Tm [Cp^ttt = 1,2,4-tris(tert-butyl)cyclopentadienyl] can be obtained either by direct reaction of NaCp^ttt with TmI₂ or by reduction of (Cp^ttt)₂TmI in non-polar solvents; this latter route may prove itself useful for the isolation of other neutral “non-classical” low-valent organolanthanide species.