Proton transfer and coordination properties of aromatic alfa- hydroxy hydrazones

GABRIELA IBAÑEZ; GRACIELA ESCANDAR; ALEJANDRO OLIVIERI

JOURNAL OF MOLECULAR STRUCTURE

Elsevier

Lugar: Asterdam; Año: 2002 vol. 605 p. 17 - 26

0022-2860

Abstract The prototropic properties of two nitro derivatives of aromatic a-hydroxy hydrazones           [2,4?dinitro?N?phenyl?N?(2?hydroxy?1?phenylmethylene hydrazine) and 2,4?dinitro?N?phenyl?    N?(2?hydroxy?1?naphthylmethylene hydrazine] have been analysed through electronic absorption,    1H and 13C nuclear magnetic resonance and semiempirical molecular orbital methods. The metal binding properties of the latter and of the unsubstituted hydrazones were evaluated from potentiometric and spectrophotometric data in dioxane?water mixtures. On the basis of the spectral analysis and PM3 semiempirical calculations, the structures of the formed complexes were proposed.