Napredna pretraga

Pregled bibliografske jedinice broj: 922290

Multiple dynamics of aroylhydrazone induced by mutual effect of solvent and light - spectroscopic and computational study


Benković, Tomislav; Kenđel, Adriana; Parlov- Vuković, Jelena; Kontrec, Darko; Chiş, Vasile; Miljanić, Snežana; Galić, Nives
Multiple dynamics of aroylhydrazone induced by mutual effect of solvent and light - spectroscopic and computational study // Journal of molecular liquids, 255 (2018), 18-25 doi:10.1016/j.molliq.2018.01.158 (međunarodna recenzija, članak, znanstveni)


Naslov
Multiple dynamics of aroylhydrazone induced by mutual effect of solvent and light - spectroscopic and computational study

Autori
Benković, Tomislav ; Kenđel, Adriana ; Parlov- Vuković, Jelena ; Kontrec, Darko ; Chiş, Vasile ; Miljanić, Snežana ; Galić, Nives

Izvornik
Journal of molecular liquids (0167-7322) 255 (2018); 18-25

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Aroylhydrazones, Tautomerism, cis-trans isomerism, Spectroscopic methods, Computational study

Sažetak
The structural identification of aroylhydrazone derived from nicotinic acid hydrazide and 2- hydroxy-5-nitrobenzaldehyde was performed in solvents of different polarities (DMSO, acetone, methanol, ethanol) by spectroscopic (NMR, UV-Vis, IR, Raman) and computational methods. In acetone solution N'-(2-hydroxy-5- nitrophenylmethylidene)-3-pyridinecarbo- hydrazide (1) adopted the most stable ketoamino form (form I-E, –CO–NH–N=C–) stabilized by intramolecular H-bonds. However, in polar protic solvents (MeOH, EtOH) the equilibria between neutral hydrazine molecule in I-E form and deprotonated molecule in I-Z form was immediately observed, while continuous conversion of I-E to I-Z was recorded during time in DMSO when solution was kept in dark. However, when solution was exposed to UV light, an isomerisation to form III-E in equilibrium with III-Z (–CO–NH–NH–C=C–) occurred in all solvents. The tautomeric and isomeric interconversion was most pronounced in DMSO solution, and is consequence of mutual effect of solvent and light. All findings acquired by experimental methods were in excellent agreement with those obtained by DFT computational methods.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekt / tema
HRZZ-IP-2014-09-4841 - Aromatski hidrazoni: sinteza, strukturna analiza, biološka aktivnost i analitička primjena

Ustanove
INA-Industrija nafte d.d.,
Institut "Ruđer Bošković", Zagreb,
Prirodoslovno-matematički fakultet, Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Uključenost u ostale bibliografske baze podataka:


  • CA Search (Chemical Abstracts)
  • INSPEC
  • PASCAL/CNRS
  • Chemical Citation Index


Citati