The copper complex of 2,6-bis(1-salicyloylhydrazonoethyl) pyridine, H(4)daps, has been prepared by an electrochemical procedure and characterised by elemental analysis, IR, FAB mass spectroscopy, Lambda(M), magnetic susceptibility measurements and EPR studies. The molecular structures of the ligand H(4)daps (1) and its copper complex [Cu(H(2)daps)(H2O)](2).2CH(3)CN (3) have been determined by X-ray diffraction studies. The ligand shows in the solid state a syn-open conformation that allows it to act as a binucleating ligand, after a conformational change, as is shown by the study of the copper dihelicate 3. This compound contains the dianionic ligand [H(2)daps](2-) in an anti-open conformation. The comparative study of this complex, with others previously reported, allows us to confirm that the conformational rearrangement undergone by H(4)daps upon complexation depends strongly on the metal nature and its stereochemical preferences.

Conformational rearrangement of 2,6-bis(1-salicyloylhydrazonoethyl)pyridine (H(4)daps) on complexation. Synthesis and X-ray characterisation of H(4)daps and its copper helicate complex [Cu(H(2)daps)(H2O)](2)center dot 2CH(3)CN / M. R. Bermejo; R. Pedrido; A. M. Gonzalez-Noya; M. J. Romero; M. Vazquez; L. Sorace. - In: NEW JOURNAL OF CHEMISTRY. - ISSN 1144-0546. - STAMPA. - 27:(2003), pp. 1753-1759. [10.1039/b305354g]

Conformational rearrangement of 2,6-bis(1-salicyloylhydrazonoethyl)pyridine (H(4)daps) on complexation. Synthesis and X-ray characterisation of H(4)daps and its copper helicate complex [Cu(H(2)daps)(H2O)](2)center dot 2CH(3)CN

SORACE, LORENZO
2003

Abstract

The copper complex of 2,6-bis(1-salicyloylhydrazonoethyl) pyridine, H(4)daps, has been prepared by an electrochemical procedure and characterised by elemental analysis, IR, FAB mass spectroscopy, Lambda(M), magnetic susceptibility measurements and EPR studies. The molecular structures of the ligand H(4)daps (1) and its copper complex [Cu(H(2)daps)(H2O)](2).2CH(3)CN (3) have been determined by X-ray diffraction studies. The ligand shows in the solid state a syn-open conformation that allows it to act as a binucleating ligand, after a conformational change, as is shown by the study of the copper dihelicate 3. This compound contains the dianionic ligand [H(2)daps](2-) in an anti-open conformation. The comparative study of this complex, with others previously reported, allows us to confirm that the conformational rearrangement undergone by H(4)daps upon complexation depends strongly on the metal nature and its stereochemical preferences.
2003
27
1753
1759
M. R. Bermejo; R. Pedrido; A. M. Gonzalez-Noya; M. J. Romero; M. Vazquez; L. Sorace
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/344903
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