General cooperative effects of single atom ligands on a metal: a 195Pt NMR chemical shift as a function of coordinated halido ligands’ ionic radii overall sum

Abstract

An inverse linear relationship between the experimentally observed ¹⁹⁵Pt NMR signals and the overall sum of coordinated halido ligands’ ionic radii was discovered in Pt(II) and Pt(IV) complexes. The reduction of ¹⁹⁵Pt NMR frequencies parallels the increase of coordinated halido ligands’ ionic radii sum. This suggests that each halido ligand may act as a conducting ring whose induced electric current shields the ¹⁹⁵Pt NMR signals proportionally to the ionic radius of the coordinated halido ligand.