ISSN:
1434-1948
Keywords:
Macrocyclic ligands
;
N ligands
;
Nickel complexes
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Isomeric cis-2,9-bis(aminomethyl)-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecanes (6a and 6b) and their octahedral (4) and square-planar nickel(II) complexes (5) have been prepared and characterized. X-ray crystallographic investigations of the octahedral complexes have confirmed a folded conformation of the macrocyclic ring. Protonation of the pendant amino groups results in a change in the Ni configuration, which is accompanied by a concomitant change of the macrocycle conformation from a folded to a planar one. The structures of the protonated, square-planar complexes and of the free ligands have been established mainly on the basis of their 1H- and 13C-NMR spectra.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
