Platinum–donor atom spin–spin coupling constants in complexes with dimethyl selenide and dimethyl telluride

Abstract

The values of ¹J(¹⁹⁵Pt–⁷⁷Se) and ¹J(¹⁹⁵Pt–¹²⁵Te) for [PtX₃SeMe₂]^–, [PtX₅SeMe₂]^–, and [PtX₃TeMe₂]^–(X = Cl, Br, or I) obtained by heteronuclear INDOR spectroscopy decrease markedly in the order Cl > Br > I and are much less than the values of ¹J(¹⁹⁵Pt–¹²⁵Te) in [(PtX₃)₂TeMe₂]^2–(X = Cl or Br) which were obtained by direct Fourier transform n.m.r. spectroscopy.