Wydział Chemii

Agnieszka Rybka

R. Koliński

S. Domagała

Julia Kłak

Jerzy Mroziński

Krzysztof Woźniak

B. Korybut-Daszkiewicz

2006

Inorganica Chimica Acta

359

4526-4534

0.1016/j.ica.2006.07.006

Naukowa

Angielski

Artykuł

Series of NiIIand CuIIcomplexes with dianionic [N2O2] ligands were synthesized and characterised applying spectroscopic and X-raydiffraction techniques. The ligands were obtained by 1:2 condensation of ethylene- and propylenediamine with malonic aldehyde deriv-atives (R2=H,R1= H or OCH3). Although the molecular formulae of the complexes are quite similar, the X-ray investigations haveproved a significant structural diversity in the solid state. Among others, we found some simple nearly planar molecules stacked in thecrystal lattice with electron density of six-membered rings delocalised over the chelate rings as well as some very complex polymeric ornickel acetate bridged trinuclear complexes. The coordination of the nickel ion by surrounding oxygen and nitrogen atoms is square-pla-nar in the simplest case and octahedral in the most complex one. Small topological differences in similar molecules generate completelydifferent crystal structures.From magnetic studies, a small, negative value ofJobtained confirms the occurrence of weak antiferromagnetic interactions betweenthe NiIIions in polymeric chain of the propylenediamine dialdehyde substituted derivative

Nickel complexes, Iminoaldehydes, X-ray structure, Copper complexes

https://doi.org/0.1016/j.ica.2006.07.006

http://www.elsevier.com