New copper(II) complexes with 1,5-bis(thiophenylidene) thiocarbohydrazone. Synthesis, characterization and crystal structure
Închide
Articolul precedent
Articolul urmator
247 1
Ultima descărcare din IBN:
2020-03-16 16:49
SM ISO690:2012
ILIES, D.; SHOVA, Sergiu; PAHONTU, Elena Mihaela; GULEA, Aurelian; ROŞU, Tudor. New copper(II) complexes with 1,5-bis(thiophenylidene) thiocarbohydrazone. Synthesis, characterization and crystal structure. In: The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova. 28-30 mai 2014, Chișinău. Chișinău, Republica Moldova: Institutul de Chimie al AȘM, 2014, p. 82.
EXPORT metadate:
Google Scholar
Crossref
CERIF

DataCite
Dublin Core
The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova 2014
Conferința "The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova"
Chișinău, Moldova, 28-30 mai 2014

New copper(II) complexes with 1,5-bis(thiophenylidene) thiocarbohydrazone. Synthesis, characterization and crystal structure


Pag. 82-82

Ilies D.12, Shova Sergiu3, Pahontu Elena Mihaela2, Gulea Aurelian4, Roşu Tudor1
 
1 University of Bucharest,
2 University of Medicine and Pharmacy “Carol Davilla”, Bucharest,
3 “Petru Poni” Institute of Macromolecular Chemistry,
4 State University of Moldova
 
Disponibil în IBN: 22 ianuarie 2019


Rezumat

The thiocarbohydrazone Schiff base ligand 1,5-bis(thiophenylidene)thiocarbohydrazone (HL1) with nitrogen and sulphur as donor atoms was synthesized through condensation of thiophene-2-aldehyde and thiocarbohydrazide in the presence of a few drops of HCl. Six copper(II) complexes were synthesized using HL1 and different copper salts. The ligand was characterized by elemental analysis, UV-Vis, FT-IR, 1H and 13C-NMR spectral studies. The structures of the complexes have been proposed by elemental analyses, molar conductance, spectral (IR, UV-Vis and EPR), magnetic and thermal studies. In addition, the structures of the ligand and complex 4 have been determined by single-crystal X-ray diffraction. The ligand HL1 crystallized into monoclinic lattices with space group P-1 21/c-1 and the complex 4 crystallized into monoclinic lattices with space group P-121/c-1. The ligand HL1 coordinates to the copper ion through the sulfur atom and the azomethine nitrogen atom. The physico-chemical analysis confirmed the newly structures of the ligand HL1 and the copper(II) complexes. In the complexes 2,3,5 and 6, the HL1 act as a mononegative bidentate ligand coordinating to the metal ion through the azomethine nitrogen atom and thiolato sulphur atom. In complexes 1 and 4 the ligand coordinates in a neutral bidentate manner. The values of μeff (1.63 – 2.20 MB) for complexes 1 6 suggest the presence of an unpaired electron and indicates the existence of monomeric species of copper(II). The EPR spectra of the complexes 2, 3, 5 and 6 recorded in DMSO solution at 77 K show signals specific to a octahedral distorted geometry for the copper center with values of g┴ between 2,076 and 2,078 g. Further, will develop a method for the synthesis of the ligand HL2 and establish his coordination ability in reaction with metal ions like Cu(II), Ni(II),Co(II) and Pd(II).