Solid-state high-resolution carbon-13 magnetic resonance spectra of dithioacetate complexes of platinum, palladium, and nickel

Abstract

High-resolution ¹³C n.m.r. spectra were measured for platinum, palladium, and nickel dithioacetato complexes with various structures and oxidation states in the solid state. The [Pt₂(S₂CMe)₄] complex showed one methyl signal, while [Ni₂(S₂CMe)₄] and [Pd₂(S₂CMe)₄] showed two and three methyl signals, respectively. These results are well explained in terms of the single-crystal X-ray structures of these complexes. Compared with the spectrum of [Pt₂(S₂CMe)₄], the quaternary carbon signal of [Pt₂(S₂CMe)₄I₂] is shifted to lower-field, while the methyl signal appears at a similar position, indicating the greater effectiveness of Pt³⁺ over Pt²⁺ in removing electron density from the surrounding quaternary carbon atoms. The one-dimensional [M₂(S₂CMe)₄I](M = Ni or Pt) complexes showed two broad methyl signals owing to the slight magnetism.