Copper(II) and zinc(II) 5,5-diethylbarbiturate complexes with 2,6-bis(hydroxymethyl)pyridine: syntheses, crystal structures and thermal decomposition behaviors

İÇSEL YILMAZ C., Genc E., Genc S., AYGÜN M., YILMAZ V. T.

Journal of Coordination Chemistry, 2026 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1080/00958972.2026.2639566
  • Dergi Adı: Journal of Coordination Chemistry
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica
  • Anahtar Kelimeler: 2,6-bis(hydroxymethyl)pyridine, 5,5-diethylbarbiturate, Copper and zinc complexes, crystal structure, thermal analysis
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

Cu(II) and Zn(II) 5,5-diethylbarbiturate (barb) complexes with 2,6-bis(hydroxymethyl)pyridine (pydimH2), namely [Cu(H2O)(barb)(pydimH)]⋅H2O and [Zn(barb)2(pydimH2)]⋅2H2O, were synthesized and fully characterized by elemental analysis, UV–Vis, FTIR, NMR and single-crystal X-ray crystallography techniques. Both Cu(II) and Zn(II) ions displayed a distorted square-pyramidal coordination sphere. The pydimH2 ligand was found in the deprotonated form (pydimH–) in the Cu(II) complex. Both neutral pydimH2 and monoanionic pydimH ligands acted as O, N, O tridentate pincer ligands, while barb was N-coordinated via the deprotonated N site. Thermal behavior of both complexes was studied in a dynamic atmosphere of air by differential thermal analysis (DTA) and thermogravimetric analysis (TG) techniques. The thermal decompositions yielded the corresponding metal oxides as a final decomposition product.