Naslov
Structural characteristic of N, N'-bis(salicylidene)-2.6-pyridinediamine

Autori
Galić, Nives ; Matković-Čalogović, Dubravka ; Cimerman, Zvjezdana

Izvornik
Journal of molecular structure (0022-2860) 406 (1997); 153-158

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

Ključne riječi
N; N'-bis(salicylidene)-2; 6-pyridinediamine; X-ray crystallography; IR spectroscopy; NMR spectroscopy; UV/Vis spectroscopy

Sažetak
The Schiff base N, N'-bis(salicylidene)-2, 6-pyridinediamine has been synthesized and characterized in the solid state and in solution using X-ray analysis, IR, UV/Vis and NMR spectroscopy. Crystal data:C19 H15N3O2Mr=317, 34. monoclinic, space group P21/c, a=19.313(5), b=5.854(2), c=14.957(6)A?=110.45(2)0, V=1584.4(9)A3, Z=4, R=0.049, Rw=0.095 for 3323 independent reflections with I>2a(I).There are two intramolecular hydrogen bonds O-H...N between the hydroxyl and imino groups of 2.564(3) and 2.633(3) A. The enolimion form is found in the solid state and is also the predominat tautometric form in solution. A tendency of interconversion to ketoamine has been observed only in rathel plar solvents, such as methanol and methanol/water mixtures and has been fonud to be very low: tautomeric constants Kt =[ketoamine]/ [enolimine] amount to 0.02 and 0.03 in methanol and methanol/water 4/1, respectively.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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