Naslov
Structural Analysis of Iron(III) Complexes with Nicotinic Acid Aroylhydrazones by IR Spectroscopy

Autori
Miljanić, Snežana ; Chis, Vasile ; Kontrec, Darko ; Galić, Nives

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts of the XXXIV European Congress on Molecular Spectroscopy / Fausto, Rui ; Bras , Elisa M. ; Justino, Licinia L. G. ; Nogueira, Bernardo A. - Coimbra : Joao Duarte, Unipessoal, Lda - OGAMI, 2018, 212-212

ISBN
978-989-20-8611-8

Skup
34th European Congress on Molecular Spectroscopy (EUCMOS 2018)

Mjesto i datum
Coimbra, Portugal, 19.08.2018. - 24.08.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Recenziran

Ključne riječi
aroylhydrazones ; Fe(III) complex ; structure ; IR spectroscopy

Sažetak
Among diverse properties of hydrazones resulting in wide range of their applications, particularly interesting are complexing abilities towards various metal ions.1 Hence three iron(III) complexes, 1, 2 and 3, were synthesized with nicotinic acid aroylhydrazones, which all contained a hydroxyl group at the C2 atom of the phenyl ring, but differed in the position of a methoxy group, being placed at the C3, C4 and C5 atom, respectively. Elemental analysis indicated 1:2 metal to ligand stoichiometry for all the prepared complexes. The proposed structures were based on analysis and assignment of the experimental infrared (IR) spectra of both ligands and complexes, supported by theoretical calculations. IR spectra implied that aroylhydrazones, consisting of the phenyl ring with the methoxy substituent in ortho (1) and para (3) position with respect to the hydroxyl group, coordinated Fe(III) in a similar way, but different from that of aroylhydrazone with the methoxy group in meta (2) position. Based on distinctive IR bands a coordination of the aroylhydrazone ligand in enolimine form was suggested for 2, binding to the metal cation through enolic oxygen, azomethine nitrogen and very likely hydroxyl group oxygen. Intense carbonyl stretching bands, observed in the IR spectra of the Fe(III) complexes 1 and 3, were associated with the carbonyl group not involved in coordination, implying existence of the ligands in ketoamine form.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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