Synthesis and spectroscopic study of complex compounds of some 3D metals with the condensation product of 1-ferrocenylbutanedione-1,3 and succinic acid dihydrozide

Abstract

We obtained by Claisen condensation β-diketone-1-ferrocenylbutanedione-1,3. The dicarboxylic acid dihydrazone of 1-ferrocenylbutanedione-1,3 (H4L) was synthesized by reacting succinic acid dihydrazide with ferrocenylacetone in a ratio of 2:1. Based on them, homobinuclear complex compounds with copper(II), zinc(II)and nickel(II) ions were obtained. The IR-, UV- and NMR spectra of the synthesized organic compounds were studied. The results of the studies showed that the H4L ligand in solution exists as a tautomeric mixture: diketone (A), keto-enol (B) and in dienol(C) forms. According to the results of spectroscopic studies, the complexes were assigned a square planar structure, where the four times deprotonated ligand residue is coordinated by each metal atom through two oxygen atoms and a nitrogen atom of the hydrazone fragment. The fourth position in the planar square of the trans-N2O2 coordination site is occupied by the ammonia molecule. Planar five- and six-membered metal cycles of synthesizers are practically coplanar with each other.