Data on the metal complexes with bis(hydrazones) obtained from various classes of dicarbonyl compounds are generalized and described systematically. The structure and complexing properties of bis(hydrazones) are considered and the factors influencing structures of the metal complexes are analyzed. The relationships between the structures and physicochemical properties of the considered compounds are discussed.

https://iopscience.iop.org/article/10.1070/RC2009v078n07ABEH003890/pdf

Metal complexes with polyfunctional ligands based of bis(hydrazones) of dicarbonyl compounds

Synthesis, characterization and extraction studies of some metal (II) complexes containing (hydrazoneoxime and bis-acylhydrazone) moieties.

Synthesis, spectral characterization and biological activity of zinc(II) complexes with 3-substituted phenyl-4-amino-5-hydrazino-1, 2, 4-triazole Schiff bases.

The reactions of bis(cyclopentadienyl)titanium(IV) chloride with a new series of Schiff bases (LH2), derived by condensing 3-(phenyl/2-chlorophenyl/4-nitrophenyl)-4-amino-5-hydrazino-1,2,4-triazoles with salicylaldehyde or 2-hydroxyacetophenone, have been studied both by conventional stirring method and also by using microwave technology. The products of type [(η5-C5H5)2Ti(L)] have been isolated in both cases. Tentative structural conclusions are drawn for the reaction products based upon physico-chemical and spectroscopic methods. The ligands behave as dibasic, tetradentate chelating agents and a six-coordinated structure have been assigned to these derivatives. Studies were conducted to assess the growth inhibiting potential of the free Schiff bases and their complexes against various bacterial strains.

Microwave assisted synthesis, spectroscopic and antibacterial studies of titanocene chelates of Schiff bases derived from 3-substituted-4-amino-5-hydrazino-1,2,4-triazoles

The reactions of bis(cyclopentadienyl)titanium(IV)/zirconium(IV) dichloride with a series of imine-oxime ligands (LH 2 ), derived by condensing benzil-α-monoxime and 2-phenylenediamine, 4-phenylenediamine, 4-methyl-2-phenylenediamine, 2,6-diamino-pyridine, have been studied in anhydrous tetrahydrofuran in the presence of base and metallocycles of the [Cp 2 M(L)] (M=Ti or Zr) type have been isolated. Tentative structures have been proposed for the products based on elemental analysis, electrical conductance and spectral (electronic, IR and 1 H-NMR) data. Proton NMR spectra indicate that on the NMR time scale there is rapid rotation of the cyclopentadienyl ring around the metal-ring axis at 25oC. Studies were conducted to assess the growth inhibiting potential of the complexes synthesized and the ligands against various bacterial strains. Keywords: Titanium(IV), zirconium(IV), imine-oxime, IR, PMR, antibacterial activity Introduction Derivatives of the bent metallocene complexes of Group IV metals have attracted increasing attention because they are applied in a variety of asymmetric catalytic and stoichiometric reactions [1-6]. Perhaps the most important application of these complexes is in the isotactic polymerization of propylene. The introduction of modifications to the classical ligands is a very effective way of varying the physical and chemical properties of the parent metallocenes over a very wide range in order to incorporate novel reactivity and optimize existing properties [1]. In continuation of our earlier studies [7-16] on the coordination behaviour of new type of ligands towards Cp

/pdf/reactions-of-cp2mcl2-m-ti-or-zr-with-imine-oxime-ligands-3fl5g34t4b.pdf

Reactions of Cp2MCl2 (M=Ti or Zr) with Imine-Oxime Ligands. Formation of Metallacycles

Bis(cyclopentadienyl)titanium(IV) and zirconium(IV) chlorides react with bis(hydrazones) derived from 1,1′-diacetylferrocene in anhydrous THF in the presence of base to give complexes of the type [(Cp2MCl)2L] [M = Ti or Zr; LH2 = ferrocenyl bis(hydrazones)]. Tentative structures are proposed for these complexes based upon elemental analyses, electrical conductance, magnetic moment and spectroscopic data.

Reactions of bis(cyclopentadienyl)titanium(IV) and zirconium(IV) chlorides with 1,1′-diacetylferrocenyl bis(hydrazones). Formation of trimetallic derivatives

Anchal Mala

Papers

Reactions of bis(cyclopentadienyl)titanium(IV) and zirconium(IV) chlorides with 1,1′-diacetylferrocenyl bis(hydrazones). Formation of trimetallic derivatives