Zur elektronenstruktur metallorganischer komplexe der f-elemente—XV. Welche haptizität besitzt der indenyl-ligand bei tetrahydrofuran-Addukten, die sich vom Grundkörper Tris(indenyl)-praseodym(III) ableiten?

Add time:07/20/2019    Source:sciencedirect.com

By comparing the room temperature absorption spectrum of a tetrahydrofuran adduct derived from tris(indenyl)-praseodymium (III) in the solid state with those of adducts derived from tris(η5-cyclopentadienyl) -praseodymium (III) it could be proved that the indenyl ligand is pentahapto bonded at room temperature. At low temperatures at least two different species are present. In glassy frozen inert solutions only one species could be detected, whereas glassy frozen solutions in 2-methyltetrahydrofuran exhibit unusual optical properties which might be consistent with a lower hapticity of the indenyl ligand.

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