Li2PtH2, Darstellung und Struktur

Li₂PtH₂, Synthesis and Structure The synthesis of Li₂PtH₂ succeeded in decomposing Li₅Pt₂H₉ at 220°C in an argon atmosphere. X-ray investigations on a powdered sample and elastic neutron diffraction experiments on the deuterated compound led to the complete structure. Li₂PtH₂ crystallizes in the space group Immm with Z = 2. The structure is characterized by [PtH₂]^2? -dumb-bells which are hitherto unknown in platinum compounds. The arrangement of the [PtH₂]^2? -anions and of the lithium cations shows a close relationship to the hydride Li₂PdH₂ which crystallizes tetragonal I-centred.