NMR Study of New Ligands as Products of Condensation of 2-Pyridinecarboxaldehyde-N-Oxide with Polyamines
摘要:
New ligands formed as products of the condensation of 2-pyridinecarboxaldehyde-N-oxide with polyamines were prepared and characterised by elemental analysis, C-13 NMR spectroscopy and infrared spectroscopy. Schiff base<->saturated heterocyclic ring isomerization was found to be quite common in this system; the five- and/or six-membered saturated heterocyclic rings containing two nitrogen atoms are more stable. (C) 2000 Elsevier Science Ltd. All rights reserved.
NMR Study of New Ligands as Products of Condensation of 2-Pyridinecarboxaldehyde-N-Oxide with Polyamines
作者:M. Boča、D. Valigura、W. Linert
DOI:10.1016/s0040-4020(99)01010-8
日期:2000.1
New ligands formed as products of the condensation of 2-pyridinecarboxaldehyde-N-oxide with polyamines were prepared and characterised by elemental analysis, C-13 NMR spectroscopy and infrared spectroscopy. Schiff base<->saturated heterocyclic ring isomerization was found to be quite common in this system; the five- and/or six-membered saturated heterocyclic rings containing two nitrogen atoms are more stable. (C) 2000 Elsevier Science Ltd. All rights reserved.
Structure of the copper (II) perchlorate complex with Schiff base ligand containing pyridine N-oxide fragments and propylene bridges: Solvatochromic effect
Electronic spectra of the copper (II) perchloratecomplexes of both ligands in different solvents were measured including time dependences. Vivid solvatochromic effect was observed for the complexes of both ligands. It was suggested that similar solvents cause similar equilibrium in the system and at least two different ways of isomerisation of the ligand during complexation exist.