Synthesis and investigation of 3d-elements coordination compounds with Schiff-type ligands based on bifunctional carbonylic compounds
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StatusThe thesis was presented on the 15 December, 2006Approved by NCAA on the 18 January, 2007 Abstract – 0.52 Mb / in romanianThesisCZU 541.49 + 547.288.3 + 546.74’56’47’881
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Keywords
template synthesis, coordination compounds, complexes of 3d metals, Schiff bases, S-alkylisotiosemicarbazides, physical methods of investigation, biological activity, catalytic properties, non-linear optic propertiesSummary
The dissertation is devoted to the investigation of template synthesis, establishment of the structure and properties of some 3d-metal complexes with organic ligands, obtained by condensation of S-alkylisothiosemicarbazones of acetylacetone, benzoylacetone or anthranilic aldehydes with bifunctional ligsons – salicylic, 5-phenylazosalicylic and anthranilic aldehydes or 4-amino-3-penten-2-one.
The methods of synthesis of 26 asymmetric coordination compounds of nickel(II), copper(II), oxovanadium(IV) and zinc(II) with open-chain tetradentate ligands and various sets of donor atoms – [N2O2], [N3O] and [N4] have been elaborated. The properties of the synthesized compounds have been studied and their electronic and geometric structures were determined.
By measurement of the static magnetic susceptibility, study of electronic spectra, IR, ESR, 1H and 13C NMR spectra has been established the square-planar or square-pyramidal structures of obtained compounds, either in crystal and/or liquid state. The crystal structures of ten representatives of various classes have been determined by X-ray crystallography. By mass-spectrometry method have been demonstrated that the structures of synthesized coordination compounds in gas phase completely correlates with their stereochemistry in crystal state.
It have been established, that some coordination compounds of nickel (II) and copper (II), are capable to effectively stimulate biosynthesis of extra-cellular enzymes at micromicetes and show catalytic properties in the processes of the alcanes oxidation. Both theoretical investigations and experimental measurements of the hyperpolarizabilities of complexes, has established, that square-planar coordination compounds with ligands on the basis of S-alkylisothiosemicarbazones of benzoylacetone and 5-phenylazosalicylic aldehyde are capable to show second order nonlinear optical transitions.
The results of this work were presented in 5 articles, 9 abstracts at different local and international conferences and one patent.
Oficial Reviewers
- Ion Bulhac
doctor habilitat, associate professor (docent), Institute of Chemistry of the ASM - Sergiu Şova
doctor, associate professor (docent)
Theses
