Mechanically activated transformations in the coordination sphere of platinum complexes induced by impact grinding of solid K2PtX6 (X = Cl, Br) and K2PtCl4 salts
Sa. Mitchenko et al., Mechanically activated transformations in the coordination sphere of platinum complexes induced by impact grinding of solid K2PtX6 (X = Cl, Br) and K2PtCl4 salts, INORG CHIM, 320(1-2), 2001, pp. 31-37
Mechanical treatment of solid K2PtX6 (X = Cl, Br) salts under air or argon
leads to the formation of paramagnetic platinum(Ill) complexes via homolyti
c cleavage of Pt-X bonds. Lewis acid sites (LASs) were also detected on the
surface of mechanically activated K2PtCl6 using a paramagnetic probe. The
latter species can be attributed to coordinatively unsaturated platinum(IV)
complexes formed as a result of heterolysis of Pt-Cl bonds. Mechanical tre
atment of solid K2PtCl4, on the contrary, does not lead to homolytic Pt-Cl
bond cleavage. In this case only heterolysis of the Pt-Cl bond takes place,
leading to the formation of coordinatively unsaturated platinum(II) comple
xes. (C) 2001 Published by Elsevier Science BN.