Nouveaux complexes organométalliques du groupe 3 pour la polymérisation par ouverture de cycle du lactide et de lactones

Thèse de doctorat de l'université de Rennes

Stereoselective ring-opening polymerization of racemic lactide using alkoxy-amino-bis(phenolate) group 3 metal complexes

Polymerization of racemic lactide initated by alkyl- and amido-yttrium complexes of a non-chiral tetradentate alkoxy-amino-bis(phenolate) ligand proceeds rapidly, in a controlled manner, to give heterotactic-rich polylactic acid

Controlled Ring-Opening Polymerization of Lactide by Group 3 Metal Complexes

International audienc

Yttrium Complexes as Catalysts for Living and Immortal Polymerization of Lactide to Highly Heterotactic PLA

International audienc

Coordination of phosphinoboranes R 2PB(C 6F 5) 2 to platinum: An alkene-type behavior

cited By 21International audienceThe paucity of boron-containing heteroalkene complexes prompted us to explore the coordination of phosphinoboranes. The complexes [R 2PB(C 6F 5) 2]Pt(PPh 3) 2 (R = Cy, t-Bu) were obtained by ethylene displacement. Spectroscopic and crystallographic data indicated symmetric side-on coordination of the phosphinoborane to Pt. Thorough analysis of the bonding situation by computational means revealed important similarities but also significant differences between the phosphinoborane and ethylene complexes. © 2012 American Chemical Society

A crystalline σ complex of copper

cited By 27International audienceOver the last decades, our understanding of σ-bond activation at transition metals has progressed considerably from both fundamental and synthetic points of view thanks to the preparation and characterization of a variety of σ complexes. Here we report the synthesis and structural analysis of the first σ complex involving a coinage metal. The copper(I) complex 2 derived from the diphosphine-disilane [Ph2P(C 6H4)Me2Si-SiMe2(C6H 4)PPh2] (1) has been isolated and crystallographically characterized. The coordination of the Si-Si σ bond to copper was thoroughly analyzed by quantum-chemical methods. © 2011 American Chemical Society

Ring-Opening Polymerization of Lactide Using Group 3 Metal Complexes Supported by Dianionic Alkoxy-Amino-Bis(phenolate) Ligands: Combining High Activity, Productivity, and Selectivity

International audienc