A new water soluble receptor 5,11,17,23-tetrasulphonato-25,27-di (hydroxycarbonylmethoxy)-26,28-dihydroxycalix[4]arene was synthesized and characterized and its proton and copper(II) complexes were studied and compared with the analogous species of the fully carboxylated ligand 5,11,17,23-tetrasulphonato -25,26,27,28-tetrakis(hydroxycarbonylmethoxy)caliz[4]arene. Delta H and Delta S degrees values are crucial for understanding the peculiar acid-base properties of the ligand. EPR spectra together with the UV-VIS spectral data reveal the coordination stereochemistry of the copper(II) species.
A new water soluble receptor 5,11,17,23-tetrasulphonato-25,27-di (hydroxycarbonylmethoxy)-26,28-dihydroxycalix[4]arene was synthesized and characterized and its proton and copper(II) complexes were studied and compared with the analogous species of the fully carboxylated ligand 5,11,17,23-tetrasulphonato -25,26,27,28-tetrakis(hydroxycarbonylmethoxy)caliz[4]arene. Delta H and Delta S degrees values are crucial for understanding the peculiar acid-base properties of the ligand. EPR spectra together with the UV-VIS spectral data reveal the coordination stereochemistry of the copper(II) species.
A new water soluble calixarene: 5,11,17,23-tetrasulphonate-25,27-di(hydroxycarbonylmethoxy)-26,28-dihydr oxycalix[4]arene. A thermodynamic and spectroscopic investigation of its proton and copper(II) complexes
ARENA, Giuseppe;BONOMO, Raffaele;CONTINO, Annalinda;SCIOTTO, Domenico
1997-01-01
Abstract
A new water soluble receptor 5,11,17,23-tetrasulphonato-25,27-di (hydroxycarbonylmethoxy)-26,28-dihydroxycalix[4]arene was synthesized and characterized and its proton and copper(II) complexes were studied and compared with the analogous species of the fully carboxylated ligand 5,11,17,23-tetrasulphonato -25,26,27,28-tetrakis(hydroxycarbonylmethoxy)caliz[4]arene. Delta H and Delta S degrees values are crucial for understanding the peculiar acid-base properties of the ligand. EPR spectra together with the UV-VIS spectral data reveal the coordination stereochemistry of the copper(II) species.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
