Synthesis, spectral analysis, and thermodynamic parameters of gold(III) complex in the presence of 4-bromo-2,6-bis(hydroxymethyl)phenol and m-nitroaniline

ALTUN Ö., Yoruç Z.

Monatshefte fur Chemie, cilt.150, sa.10, ss.1785-1791, 2019 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 150 Sayı: 10
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1007/s00706-019-02498-0
  • Dergi Adı: Monatshefte fur Chemie
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1785-1791
  • Anahtar Kelimeler: Au(III), Equilibrium constant, Ligand, Molar composition, Structural analysis
  • Trakya Üniversitesi Adresli: Evet

Özet

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. Graphic abstract: [Figure not available: see fulltext.].