Complex platinum hydride A2PtH4 with A=Na, K, Rb, or Cs

Article abstract of DOI:10.1016/0022-5088(88)90182-8

Complex platinum hydrides have been synthesized by the reaction of binary alkali-metal hydrides with platinum sponge in a hydrogen atmosphere. The crystal structure was determined by X-ray investigations on powdered samples and neutron diffraction experiments on the deuterated compounds. The high temperature modifications crystallize in the K₂PtCl₆-type structure with hydrogen occupying two thirds of the chlorine positions. The tetragonal structures of the low temperature modifications are characterized by isolated, square planar [PtH₄]^2- groups.