Nalazite se na CroRIS probnoj okolini. Ovdje evidentirani podaci neće biti pohranjeni u Informacijskom sustavu znanosti RH. Ako je ovo greška, CroRIS produkcijskoj okolini moguće je pristupi putem poveznice www.croris.hr
izvor podataka: crosbi

Diverse coordination of aroylhydrazones toward iron(III) in solid state and in solution: spectrometric, spectroscopic and computational study (CROSBI ID 271564)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Benković, Tomislav ; Kontrec, Darko ; Kazazić, Saša ; Chiş, Vasile ; Miljanić, Snežana ; Galić, Nives Diverse coordination of aroylhydrazones toward iron(III) in solid state and in solution: spectrometric, spectroscopic and computational study // Molecular diversity, 24 (2020), 1253-1263. doi: 10.1007/s11030-019-09989-6

Podaci o odgovornosti

Benković, Tomislav ; Kontrec, Darko ; Kazazić, Saša ; Chiş, Vasile ; Miljanić, Snežana ; Galić, Nives

engleski

Diverse coordination of aroylhydrazones toward iron(III) in solid state and in solution: spectrometric, spectroscopic and computational study

The coordination properties of N'-(2-hydroxy-3- methoxyphenylmethylidene)-3- pyridinecarbohydrazide (H2L1), N'-(2-hydroxy-4- methoxyphenylmethylidene)-3- pyridinecarbohydrazide (H2L2), and N'-(2-hydroxy- 5-methoxyphenylmethylidene)-3- pyridinecarbohydrazide (H2L3) towards Fe(III) ions were studied by computational, spectrometric (MS) and spectroscopic methods (UV-Vis, IR and Raman spectroscopy) in solid state and in solution. Free ligands were present in ketoamine form with intramolecular H-bond. In MeOH:H2O 1:1 system, the 1:1 complexes with Fe(III) were formed, characterized by lgK > 6. The coordination to the metal ion was achieved via oxygen and azomethine nitrogen since the hydrolysis of hydrazone bond was supressed. Unlike the 1:1 stoichiometry in methanolic solution, the composition of the complexes extracted to chloroform was Fe(L)(HL). The release of three protons upon complexation was determined by independent spectrophotometric measurements. The complexes isolated from MeOH/EtOH solution have also stoichiometry 1:2. However, depending on the position of the methoxy substituent, two types of complexes were formed. In Fe(H2L1)2Cl3 and Fe(H2L3)2Cl3 hydrazones acted as neutral ligands, while in Fe(HL2)2Cl the keto- enol tautomeric interconversion and release of one proton per ligand took place. All complexes were analysed in gas phase as well, using triple quadrupole, ion trap, and H/D exchange for determination of labile hydrogens. Based on the fragmentation pathways, the structural isomers were distinguished.

aroylhydrazones, Fe(III), complexes, UV-Vis, IR and Raman spectroscopy, mass spectrometry, computational methods

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

nije evidentirano

Podaci o izdanju

24

2020.

1253-1263

objavljeno

1381-1991

1573-501X

10.1007/s11030-019-09989-6

Povezanost rada

Kemija

Poveznice
Indeksiranost