TABLE OF CONTENTS

Five cationic complexes of the general formula [Cp₂Ti(A)₂]²⁺ [Cl^-]₂ [Cp = ⁵-(CH₃)C₅H₄ and A = glycine, 1; 2-methylalanine, 2; N-methylglycine, 3; L-alanine, 4; and D-alanine 5] were prepared by the reaction of Cp₂TiCl₂ and the appropriate -amino acid in 1:2 molar ratio from methanol-water solution in high yield.

Two new vanadyl(IV) complexes with the non-steroideal anti-inflammatory drugs (Indomethacin and Diclofenac) were synthesized and characterized. The structures of the complexes were obtained by carrying out ab initio calculations (B3LY/3-21G**) due to the difficulties to obtain single crystals of good quality for X-ray studies. The free ligands did not cause any effect when tested on cellular proliferation in the osteoblast cell lines in culture MC3T3E1 and UMR106. The biological effect of the complexes is discussed.

The sorption behaviour of tributyltin from reconstituted seawater onto municipal solid waste compost was investigated with regard to the effects of adsorptioninetics, influence of pH, and adsorbate hydrophobicity on the partitioning process.

This paper analyzes data from 18 different water bodies (5 lakes, 1 river, 6 estuary/marine, 6 experimental). Algal blooms, As(III) peaks and algal blooms with preceding or coincident As(III) peaks are identified. In total, 80 algal blooms are identified, 49 (61%) of which are associated with As(III) peaks. In 78% of water bodies algal blooms were typically (>50%) associated with As(III) peaks. The average time lag between As(III) peaks and algal blooms is 20 days (standard deviation 18 days).

The analysis of the haemolysisinetics of human erythocytes in the presence of diphenyltin dichloride (A) and triphenyltin chloride (B) shows differences between the effect of the compound studied on mechanical properties at the so-called non-lytic concentrations. Diphenyltin dichloride shows a limited effect on erythrocyte haemolysis, whereas triphenyltin chloride affects all the parameters measured (extent of initial haemolysis, extent of final haemolysis and membrane mechanical strength). We correlate these effects with location of the investigated compounds in liposomes.

A molybdenum-containing preceramic polymer, MoPMS, was synthesized for the first time by HCl elimination of polymethylsilane (PMS) and MoCl₅ at room temperature in tetrahydrofuran. The preceramic polymer and the ceramic were characterized by IR, thermogravimetric analysis, X-ray diffraction, scanning and transmission electron microscopy, and BET surface area.

Optimization of platinum and PtRu colloid syntheses via NR₄(BEt₃H) reduction was achieved via the reverse addition mode. The amount of stabilizing agent could be reduced by 40%. This improvement leads to a better particle size control and a considerable reduction of unwanted organic residues on the metal colloid particle surface.

A porous, solid insoluble polysiloxane-immobilized ligand system bearing pyrogallol active sites has been prepared and characterized.

Reductive stabilization was performed to give colloidal copper particles (7-15 nm). Thermal decomposition of silver lactate yields air-stable silver nanofluids (size distribution 9.5 ± 0.7 nm). Both products are suitable precursors for heat conductive media.

Germanium(II) dipropionate (1) has been synthesized. Its crystal structure, as well as the crystal structure of germanium(IV) tetrapropionate (2), has been determined. Although compound 2 is monomeric with monodentate propionate ligands, compound 1 is associated, forming a cyclotetramer via intermolecular dative CO Ge interactions.

The zinc(II) and cadmium(II) complexes, which were synthesized by the reaction of metal(II) halides with 1,4-dimethylhomopiperazine (hp), showed five coordination types (ZnX₂N₂ for X = Cl, Br, I; ZnX₃N for X = Cl, Br; (CdCl₂N₂)_n, (CdCl₂N)₂(µ-Cl)₂ and (CdXN₂)₂(µ-X)₂ for X = Br, I). Two structural exchanges were observed from ZnBr₂N₂ to ZnBr₃N type and from (CdCl₂N₂)_n to (CdCl₂N)₂(µ-Cl)₂ type during recrystallization.

Thermolysis of Fe(CO)₅ or Fe(CO)₅/Co₂ (CO)₈, dissolved in tetrahydronaphthalene, in the presence of aluminum trialkyl leads to uniform sized Fe or FeCo nanoparticles, respectively. Subsequent treatment with very diluted oxygen forms a shell which protects the metallic or alloyed core of the particles against further oxidation. With the help of surfactants the particles can be peptized in organic solvents, resulting in magnetic fluids with extraordinary magnetic properties.

A set of organoaluminum compounds containing O,C,O-chelating ligands was prepared. The X-ray diffraction analysis showed that the aluminum atom is [4 + 1] coordinated with the trans-trigonal bipyramidal geometry. Solution NMR studies indicated the four coordinated aluminum atom and dissociation/association dynamic process in a solution of these compounds.

We have discovered that the reaction of barium disilylamides with gaseous hydrogen sulfide provides a new route to crystalline barium sulfide, BaS. This route is particularly noteworthy, in that it occurs at room temperature rather than the elevated temperatures used in previous preparations. The BaS formed in the sulfidation reaction has been shown by X-ray powder diffraction to have the face-centered cubic structure, space group Fm3m (225).