Binuclear and polynuclear transition metal complexes with macrocyclic ligands. 4. New polydentate azomethine ligands based on 2,5-diformylpyrrole and 2,6-diformylpyridine |
| |
Authors: | Katayev E A Reshetova M D Ustynyuk Yu A |
| |
Institution: | (1) Department of Chemistry, Moscow State University, Leninskie Gory, 119992 Moscow, Russian Federation |
| |
Abstract: | The reactions of 2,5-diformylpyrrole (1) and 2,6-diformylpyridine (2) with propane-1,3-diamine afforded new macrocyclic Schiff"s bases 5 and 6, respectively. Their structures were established by NMR spectroscopy and mass spectrometry. Binuclear copper(ii) and nickel(ii) complexes with ligand 5 were synthesized. Pentadentate Schiff"s base, viz., 2,6-bis(2-aminophenylimino)methyl]pyridine, was prepared by demetallation of its complex with Cd(ClO4)2 using Na2S. In solutions, the latter Schiff"s base is quantitatively transformed into 2,6-bis(benzoimidazolyl)pyridine under the action of atmospheric oxygen or other mild oxidizing agents. |
| |
Keywords: | macrocyclic ligands Schiff"s bases NMR spectroscopy mass spectrometry MALDI-TOF ESI-MS |
本文献已被 SpringerLink 等数据库收录! |
|