Abstract
In the present study, we synthesized 4-bromo-2,6-bis(hydroxymethyl)phenol (BBHMP), and a gold(III) complex was synthesized in the presence of BBHMP and m-nitroaniline (m-NA). The synthesized complex was characterized using spectral (mass, UV–Vis, FT-IR, 1H NMR, 13C NMR) and thermal measurements (TG–DTA). The results showed that the optimum conditions for the reactions are pH 7, λ = 412 nm and the mole ratio of BBHMP:m-NA:Au3+ is 1:1:1. The reaction of BBHMP and m-NA with Au(III) was found to be a complexation reaction and one BBHMP molecule and one m-NA molecule react with one Au(III) molecule. Additionally, the equilibrium constant (K), Gibbs free energy (ΔG), enthalpy (ΔH), and entropy (ΔS) were calculated at 298.16 and 313.16 K, respectively. According to the thermodynamic parameters, the reaction was exothermic because of the decrease in entropy and it was a non-spontaneous process.
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