10.1021/ic802286u
The study focuses on the synthesis, structural characterization, and reactivity of palladium(II) aminodiphosphine PNP pincer complexes, specifically the dialkylamides [PdR(PNP)] (where R is Cl, Me, Ph; PNP is (NCH2CH2PiPr2)2). These complexes were prepared and characterized to understand their role in C-N coupling reactions, which are significant in cross-coupling reactions like the Hartwig-Buchwald process. The chemicals used include palladium(II) salts, KOBu, AgPF6, TlPF6, MeOTf, PMe3, CNtBu, and various solvents like benzene, THF, and pentane. These reagents and solvents serve various purposes such as deprotonation, chloride abstraction, oxidation, and methylation reactions, as well as solvents for reactions and purification steps. The study aims to provide insights into the molecular structures, basicity (pKa values), and reactivity patterns of these complexes, which are crucial for understanding catalytic mechanisms in C-N bond formation. The results indicate that the palladium PNP dialkylamido complexes are stable, feature pyramidal nitrogen atoms, and exhibit reactivity towards electrophiles and oxidizing agents, with the reactivity being influenced by the nature of the ligands and the palladium-nitrogen bonding.
10.1039/b106243n
The study focuses on the synthesis and characterization of a series of ruthenium(II) complexes containing bulky, functionalized trialkylphosphines, specifically tBu2PCH2XC6H5, as ligands. These complexes were prepared through reductive routes or ligand replacement reactions, and their structures and properties were investigated. The chemicals used in the study include ruthenium(III) chloride hydrate (RuCl3·3H2O), trialkylphosphines tBu2PCH2XPh (where X = CH2 or OCH2), isoprene, and various other reagents such as AgPF6, acetone, CH3CN, and PMe3. These chemicals served as starting materials, ligands, reducing agents, and solvents in the preparation of the complexes. The purpose of these chemicals was to create a variety of ruthenium(II) complexes that can be used as catalysts in olefin metathesis reactions, with the aim of modifying the coordination sphere of the metal to find potentially better catalysts for these reactions. The study also explored the reactivity of these complexes towards various substrates, such as acetylene, to form new compounds like allenylidene and vinylidene complexes, which were further tested for their catalytic activity in ring-opening metathesis polymerization (ROMP) of cyclooctene.
C
