Influence of temperature on the thallium-205 chemical shift of dimethylthallium(III) derivatives

Abstract

Thallium-205 chemical shifts for Tl(CH₃)₂X (X = NO₃, BF₄, or O₂CCH₃) in several solvents have been determined as a function of temperature, solute concentration and, in some cases, added anion concentration. The observed temperature-dependent chemical shift range is generally larger than those resulting from changes in solute or anion concentration. The origin of the temperature-dependent chemical shift is discussed in terms of the nature of the species present in solution.