Synthesis, structural, magnetic and thermal studies of copper(II) 5,5-diethylbarbiturate complexes with nicotinamide, 2,2′-bipyridine and triethanolamine

YILMAZ V. T., YILMAZ F., İÇSEL YILMAZ C., AYGÜN M.

Journal of Coordination Chemistry, cilt.76, sa.3-4, ss.414-423, 2023 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 76 Sayı: 3-4
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1080/00958972.2023.2178310
  • Dergi Adı: Journal of Coordination Chemistry
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, Chimica, Metadex
  • Sayfa Sayıları: ss.414-423
  • Anahtar Kelimeler: 2,2′-bipyridine, 5,5-diethylbarbiturate, Copper(II) complex, nicotinamide, triethanolamine
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Three new copper(II) 5,5-diethylbarbiturate (barb) complexes of nicotinamide (nia), 2,2′-bipyridine (bpy) and triethanolamine (tea), trans-[Cu(barb)2(nia)2]⋅2H2O (1), cis-[Cu(barb)2(bpy)]⋅3H2O (2) and [Cu2(barb)2(tea)2]⋅2H2O (3), were synthesized and characterized by elemental analysis, spectroscopic (UV-Vis and FTIR) and magnetic moment measurements. Single crystal X-ray crystallographic measurements showed that 1 and 2 are mononuclear, while 3 is binuclear, in which two copper centers were bridged by deprotonated ethanol groups of two tea ligands. The barb ligand in these complexes is a bidentate N, O-donor. Thermal analysis (TG/DTA) studies in air indicated that the complexes first dehydrated and then the decomposition of nia, bpy or tea ligands occurred. The last exothermic stage was associated with degradation of the barb moiety to yield CuO as the end product.