Physicochemical studies and electronic structure of some nickel triazacyclic complexes with guanidine derivatives

The properties of complex compounds produced by template condensation of sa licylideneaminoguanidines with salicylaldehyde on a nickel(II) ion matrix a re studied. It is shown that the potassium ion in a nitrogen-substituted tr iazacyclic complex can be replaced by a tetrabutylammonium cation. The elec tronic structure of the compounds obtained is characterized using UV, IR, a nd (H-1, C-13) NMR spectroscopies. A chelate compound produced from nitroam inoguanidine was found to exhibit the effect of electron density redistribu tion involving nickel AO. As a result, two benzene rings of the complex ani on become nonequivalent.