Lanthanide Borohydrides Supported by an Ansa-Bis(amidinate) Ligand with a Rigid Naphthalene Linker. Synthesis, Structure and Catalytic Activity in Ring-Opening Polymerization of Lactide - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Inorganica Chimica Acta Année : 2012

Lanthanide Borohydrides Supported by an Ansa-Bis(amidinate) Ligand with a Rigid Naphthalene Linker. Synthesis, Structure and Catalytic Activity in Ring-Opening Polymerization of Lactide

Résumé

The reactions of Ln(BH4)3(THF)2 with an equimolar amount of the dilithium derivative of a bridged bis(amidine) containing a conformationally rigid naphthalene linker afforded heterobimetallic ansa-bis(amidinate) lanthanide borohydrides [1,8-C10H6{NC(tBu)N-2,6-Me2-C6H3}2]Ln(BH4)(μ-BH4)Li(THF)2 (Ln = Nd, 2; Sm, 3). In the solid state, intermolecular contacts between the lithium atom and the terminal borohydrido groups of these compounds lead to the formation of one-dimensional zigzag coordination polymer chains. Compounds 2 and 3 are active in the ring-opening polymerization (ROP) of racemic lactide at 20 °C, acting as single-site diinitiators with the two borohydride groups operative, and providing polymers with a slight heterotactic bias (Pr = 0.54-0.62), controlled molecular weights and relatively narrow polydispersities (Mw/Mn = 1.5-1.7).

Domaines

Catalyse

Dates et versions

hal-00872415 , version 1 (12-10-2013)

Identifiants

Citer

Marina V. Yakovenko, Alexander A. A. Trifonov, Evgeny Kirillov, Thierry Roisnel, Jean-François Carpentier. Lanthanide Borohydrides Supported by an Ansa-Bis(amidinate) Ligand with a Rigid Naphthalene Linker. Synthesis, Structure and Catalytic Activity in Ring-Opening Polymerization of Lactide. Inorganica Chimica Acta, 2012, 383, pp.137-142. ⟨10.1016/j.ica.2011.10.060⟩. ⟨hal-00872415⟩
82 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More