191853-31-3Relevant academic research and scientific papers
Terminal Phosphido Complexes of the Ru(n5-Cp?) Fragment
Yang, Jin,Langis-Barsetti, Sophie,Parkin, Hayley C.,McDonald, Robert,Rosenberg, Lisa
, (2019)
In situ generation of the five-coordinate complex Ru(n5-Cp?)(PR2)(PPh3) (2), via dehydrohalogenation of Ru(n5-Cp?)Cl(PR2H)(PPh3), has allowed its reactivity toward a range of small molecules to be compared with that of its well-studied analogue Ru(n5-indenyl)(PR2)(PPh3) (1), in a study designed to assess the likelihood of variable hapticity in the chemistry of complex 1. Reactions of 2 with hydrogen, carbon monoxide, phenylacetylene, ethylene, acrylonitrile, and 1-hexene demonstrate enhanced nucleophilicity/basicity of the terminal phosphido ligand in 2 relative to that in complex 1. Complex 2 also exhibits greater lability of the PPh3 ligand, leading to substitutional product mixtures that were not observed for 1. Both of these features are consistent with the more electron-rich and sterically imposing nature of the Cp? ligand in 2 relative to the indenyl ligand in 1. Nevertheless, the fundamental transformations of the phosphido ligand are comparable for the two complexes. This suggests that variable hapticity does not play a role in reactions of indenyl complex 1, since n5-n3 shifts are unlikely to occur for Cp? complex 2. The implications of these reactivity studies for the design of highly active, yet stable, ruthenium half-sandwich catalysts for hydrophosphination are discussed.
Synthesis, properties and crystal structures of pentamethylcyclopentadienyl- and cyclopentadienyl-ruthenium(II) diphenylphosphine complexes
Lubian, Roman Torres,Paz-Sandoval, M. Angeles
, p. 17 - 29 (2007/10/03)
The synthesis, characterization and single-crystal structure determination of chiral compounds (η5-C5R5)Ru(PHPh2)(PPh3)Cl (R=H 3, R=Me 4) and prochiral Cp * Ru(PHPh2)2Cl (6) are described. Compound 6 has been available from reaction of PHPh2 and several starting materials. The X-ray structure comparison between 3, 4 and 6 allowed us to compare the influence of the phosphine, Cp and Cp * ligands in these half-sandwich compounds. In addition, a structural investigation was carried out on Cp * Ru(NBD)Cl (7).
