A Journey in Metal-Ligand Multiple Bond Chemistry

Department of Chemistry, Imperial College of Science, Technology and Medicine, Exhibition Road, South Kensington, London SW7 2QA, UK [Pg.140]

My first PhD student, Terry Kee (now on the faculty at the University of Leeds) set about trying to make the niobium and tantalum compounds by reaction of M(0)Cl3 with a variety of Cp sources. We tried them all All failed, and all we were able to salvage from this initial endeavour were improved syntheses of the M(0)Cl3 starting materials. Other obvious routes, e.g. via reaction of [MC Cp] with (Me3Si)20 also proved unsuccessful, in the case of [TaCl Cp ] (Cp = pentamethylcyclopentadienyl) affording [ TaCl3Cp 2(/i- [Pg.141]

O)] and [TaCl3(OSiMe3)Cp ]. Terry, however, would not be thwarted, and he switched from looking at high-valent routes to exploring the potential for low-valent precursors. He was subsequently able to show to our surprise that the half-sandwich tertiary phosphine tantalum(iii) complex, [TaCl2(PMe3)2Cp ] [Pg.141]

A Journey in Metal-Ligand Multiple Bond Chemistry [Pg.142]

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