Multivariant Crystallization of Tetraplatin Precursors from Solutions Containing 1,2-C₆H₁₀(NH₃)₂ ²⁺ and [PtCl₆]^2– Ions

Abstract

Seven new phases containing hexachloroplatinate [PtCl 6 ]2− and trans-1,2-dl-diammoniumcyclohexane 1,2-C 6 H 10 (NH 3 ) 2 2+ ions were obtained by crystallization from solutions with minor variation of synthesis conditions. The compounds can be applied as precursors for the synthesis of effective anticancer drug tetraplatin ([PtC 6 H 10 (NH 2 ) 2 Cl 4 ]). The phase diversity was achieved by alterations including solvent acidity, crystallization rate, temperature, type of solvent, and the reagents ratio. The compounds were characterized by chemical and thermal analysis, IR, and 1 H NMR spectroscopy. Crystal structures of the five compounds were determined by X-ray powder diffraction technique. The phases have ionic structures involving H 2 O, HCl molecules, or Cl − ions as supplementary species in the lattices. It helps to arrange some frames additionally interconnected by hydrogen bonds between ions and solvent molecules. It was suggested that crystal lattices adapted associated particles presented in solutions. It results in observed variety of the crystal structures. Besides the basic interest the obtained results are important for tetraplatin synthesis control.

Interlayer modification and single-layer exfoliation of the Ruddlesden–Popper perovskite oxynitride K2LaTa2O6N to improve photocatalytic H2 evolution activity

“…It has been reported that 1,2-C 6 H 10 (NH 3 ) 2 2+ will react with [PtCl 6 ] 2− to form [PtC 6 H 10 (NH 2 ) 2 Cl 4 ], most likely as a consequence of a Lewis acid–base interaction. 43 A similar Lewis acid–base interaction would be expected to occur between CH 3 CH 2 NH 3 + ( i.e. , intercalated EA in the EA/H x K 2− x LaTa 2 O 6 N) and [PtCl 6 ] 2− , thereby resulting in the sequential photodeposition of Pt.…”