Cationic Hydridotriplatinum Complex with Bridging
Germylene Ligands
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Abstract
Triplatinum
complexes with bridging secondary germylene ligands,
[{Pt(PMe<sub>3</sub>)}<sub>3</sub>(μ-GeR<sub>2</sub>)<sub>3</sub>] (R = Ph, <sup><i>n</i></sup>Bu), were prepared from the
reaction of H<sub>2</sub>GeR<sub>2</sub> with [Pt(PMe<sub>3</sub>)<sub>4</sub>] in a 1:1 ratio. Protonation of the triplatinum complexes
with HBF<sub>4</sub> led to formation of the cationic hydride complexes
[{Pt(PMe<sub>3</sub>)}<sub>3</sub>(μ-GeR<sub>2</sub>)<sub>3</sub>(μ<sub>3</sub>-H)]BF<sub>4</sub> (R = Ph, <sup><i>n</i></sup>Bu). The results of multinuclear NMR spectra and DFT calculations
of the cationic complexes revealed that the Pt<sub>3</sub>H core has
a trigonal-pyramidal structure with rapid exchange of the μ<sub>3</sub>-hydride ligand position between the two possible positions
on the opposite side of the Pt<sub>3</sub> plane
