Scandium Carbene Complexes: Synthesis of Mixed Alkyl, Amido, and Phosphido Derivatives
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posted on 2015-01-12, 00:00 authored by Marie Fustier, Xavier-Frédéric Le Goff, Martin Lutz, J. Chris Slootweg, Nicolas MézaillesDifferent
synthetic strategies are proposed to obtain a family of scandium carbene
complexes. Starting either from scandium trichloride, scandium trisbenzyl,
or the known scandium bis(diphenylthiophosphinoyl)methanediide
chloride complex 1, the homoleptic bis-carbene complex
[Sc{C(PPh2S)2}2Li(THF)2] (3), the alkyl-carbene complex [Sc{C(PPh2S)2}{CH(PPh2S)2}(THF)] (5), the amido-carbene complex [Sc{C(PPh2S)2}{N(SiMe3)2}(THF)] (7), and the phosphido-carbene complex [Sc{C(PPh2S)2}{P(SiMe3)2}(Py)2]
(8) were obtained. The influence of the nature of the
anionic ligand in trans position to the carbene ligand
on the geometries at Sc was probed by DFT calculations in the case
of complexes 7 and 8.
