Pregled bibliografske jedinice broj: 705739
Supramolecular stabilization of metastable tautomers in solution and solid state
Supramolecular stabilization of metastable tautomers in solution and solid state // Chemistry : a European journal, 20 (2014), 52; 17333-17345 doi:10.1002/chem.201403543 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 705739 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Supramolecular stabilization of metastable tautomers in solution and solid state
Autori
Juribašić, Marina ; Bregović, Nikola ; Stilinović, Vladimir ; Tomišić, Vladislav ; Cindrić, Marina ; Šket, Primož ; Plavec, Janez ; Rubčić, Mirta ; Užarević, Krunoslav
Izvornik
Chemistry : a European journal (0947-6539) 20
(2014), 52;
17333-17345
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
tautomerism ; Schiff base ; keto-enol ; supramolecular stabilization ; metastable tautomers
Sažetak
This work presents a successful application of recently reported supramolecular strategy for stabilization of metastable tautomers in cocrystals to monocomponent non-heterocyclic tautomeric solids. The quantum-chemical computations and solution studies show that the investigated Schiff base molecule, derived from 3-methoxysalycilaldehyde and 2-amino-3-hydroxypyridine (ap), is far more stable as the enol tautomer. In the solid state however, in all three obtained polymorphic forms it existed solely as the keto tautomer, in each case stabilized by unexpected hydrogen bonding pattern. The computations have shown that hydrogen bonding of investigated Schiff base with the suitable molecules shifts the tautomeric equilibrium to the less stable keto form. The extremes to which supramolecular stabilization can lead are demonstrated by the two polymorphs of molecular complexes of Schiff base with ap. The molecules of both constituents of molecular complexes are present as metastable tautomers (keto anion and protonated pyridine, respectively), stabilizing each other via a very strong hydrogen bond. All obtained solid forms proved stable on various solid-state and solvent mediated methods used to establish their relative thermodynamic stabilities and possible interconversion conditions.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
POVEZANOST RADA
Projekti:
MZOS-098-0982915-2950 - Dizajn, sinteza i svojstva organskih liganada i njihovih metalnih kompleksa (Ćurić, Manda, MZOS ) ( CroRIS)
MZOS-119-1191342-1082 - Novi kompleksni spojevi i materijali-kemijski i biološki katalizatori (Cindrić, Marina, MZOS ) ( CroRIS)
MZOS-119-1191342-2960 - Elektroliti i koordinacijske reakcije u otopini (Tomišić, Vladislav, MZOS ) ( CroRIS)
MZOS-119-1193079-3069 - Novi organski i koordinacijski spojevi - sinteza i suodnos struktura-svojstvo (Kaitner, Branko, MZOS ) ( CroRIS)
Ustanove:
Institut "Ruđer Bošković", Zagreb,
Prirodoslovno-matematički fakultet, Zagreb
Profili:
Vladislav Tomišić
(autor)
Vladimir Stilinović
(autor)
Nikola Bregović
(autor)
Marina Juribašić Kulcsar
(autor)
Marina Cindrić
(autor)
Krunoslav Užarević
(autor)
Mirta Rubčić
(autor)
Citiraj ovu publikaciju:
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
- MEDLINE