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A series of complexes of the type Cp*IrCl2(NHC) were synthesized with the aim of evaluating the capabilities in C-H activation, specifically in H/D exchange of a wide range of organic molecules. The Cp*IrCl2(NHC) catalysts are tested in the deuteration of organic molecules, using CD3OD as deuterium source.

Research demonstrates the stereoselective synthesis of two rhodium compounds by exchanging acetate with succinimidate that exhibit metalated phosphines in the head-to-tail and head-to-head configuration. The latter is thermodynamically stable. Data indicate that the succinimidate ligands do not influence selectivity.

The reversible chelating and bridging coordination properties of the metalated ligand (P(C6H4)Ph2)(super -) have been studied. The synthesis and chemical properties of tetranuclear metalated palladium compound has also been investigated. This novel compound has a parallelogram structure of pour Pd atoms with alternate sides bridged by two orthometalated phosphines or two bromides. Each Pd atom is bound to a carbon, a phosphorus and two bromine atoms.

New N-heterocyclic complexes of Rh and Ir are produced by three different reaction procedures for coordinating N-n-butyl-N'-(2-pyridylmethyl)imidazolium salt. NHC-IrIII-H complex is produced by the direct reaction of the imidazolium salt with {IrCl(ced)]2.

The synthesis and reactivity of new rhodium (Rh) and iridium (Ir) complexes with [1,1,1-tris(3-butylimidazol-2-ylidene)methyl]ethane (TIME(super Bu)) is reported. The crystal structures of two of the rhodium complexes are reported and the catalytic activity for the homogeneous hydrosilylation of alkynes is also described.

The preparation of new Ru(II) -pcymene complexes are used with two carbene-ligand precursors, methylenebis(N-alkylimidazolium) iodide (alkyl = methyl, neo-pentyl) and ethylenebis(N-methylimidazoluim) chloride. The data reports the reasons that determine the reactivity and synthetic difficulties of the product.

Research has been conducted on Rh(I) and Rh(III) chelate bis-heterocyclic-carbene complexes. The authors report the production of these complexes, their characterization and the determination of their molecular structures.

The synthesis, reactivity and X-ray crystallographic characterization of mono, di and tetranuclear metallated palladium(II) compound is conducted with an aim of evaluating the influence of the entering ligand on the nature of the reaction products. The results confirm the ability of the ligand to expand a bridging or chelating coordination mode, depending on the auxiliary ligands present in the complex.

Reaction of the racemic [Pd(C6H4PPh2)Br]4 (1) with the silver salt of 1R-(1α,2β,3α)]-3-methyl-2-(nitromethyl)-5-oxocyclopentaneacetate, (R)-AgO2CR*, results in the formation of a mixture of diastereoisomers (RRR)-2 and (SRR)-2 of the formula Pd2(C6H4PPh2)2(O2CR*)2 that were separated by standard chromatographic methods. Each diastereoisomer was readily converted into the tetrametallic stereoisomers (SS)-1 and (RR)-1, of the formula [Pd(C6H4PPh2)Br]4 that were isolated and characterized by X-ray crystallography. The R enantiomer of the solvated cationic species [cis-Pd2(C6H4PPh2)2(NCCH3)4]2+, obtained from (RR)-1, was reacted with ammonium terephthalate yielding RRR-[Pd2(C6H4PPh2)2]3(O2CC6H4CO2)3, (RRR)-5. The reaction of ammonium diphenyldicarboxylate with the S enantiomer of the solvated species, gave SSS-[Pd2(C6H4PPh2)2]3(O2CC6H4C6H4CO2)3, (SSS)-6. Compounds 5 and 6 have been crystallographically characterized. Reactions performed with racemic [Pd2(C6H4PPh2)2(CH3CN)4]2+, have also been studied and the relative chiralities of the triangles have been determined by 31P NMR spectroscopy. [ABSTRACT FROM AUTHOR]

Reaction of the racemic [Pd(C6H4PPh2)Br]4 (1) with the silver salt of 1R-(1α,2β,3α)]-3-methyl-2-(nitromethyl)-5-oxocyclopentaneacetate, (R)-AgO2CR*, results in the formation of a mixture of diastereoisomers (RRR)-2 and (SRR)-2 of the formula Pd2(C6H4PPh2)2(O2CR*)2 that were separated by standard chromatographic methods. Each diastereoisomer was readily converted into the tetrametallic stereoisomers (SS)-1 and (RR)-1, of the formula [Pd(C6H4PPh2)Br]4 that were isolated and characterized by X-ray crystallography. The R enantiomer of the solvated cationic species [cis-Pd2(C6H4PPh2)2(NCCH3)4]2+, obtained from (RR)-1, was reacted with ammonium terephthalate yielding RRR-[Pd2(C6H4PPh2)2]3(O2CC6H4CO2)3, (RRR)-5. The reaction of ammonium diphenyldicarboxylate with the S enantiomer of the solvated species, gave SSS-[Pd2(C6H4PPh2)2]3(O2CC6H4C6H4CO2)3, (SSS)-6. Compounds 5 and 6 have been crystallographically characterized. Reactions performed with racemic [Pd2(C6H4PPh2)2(CH3CN)4]2+, have also been studied and the relative chiralities of the triangles have been determined by 31P NMR spectroscopy. [ABSTRACT FROM AUTHOR]