%0 Journal Article
%A Zhou, Fengying
%A Lin, Miaoshui
%A Li, Lei
%A Zhang, Xueqing
%A Chen, Zhou
%A Li, Yahong
%A Zhao, Yang
%A Wu, Jin
%A Qian, Guimin
%A Hu, Bin
%A Li, Wu
%D 2011
%T Heterobimetallic Samarium(III) and Titanium(IV) Complexes with Bifunctional Catalytic Properties
%U https://acs.figshare.com/articles/journal_contribution/Heterobimetallic_Samarium_III_and_Titanium_IV_Complexes_with_Bifunctional_Catalytic_Properties/2676862
%R 10.1021/om1010935.s001
%2 https://acs.figshare.com/ndownloader/files/4340545
%K titanium amido
%K Ti
%K samarium atom
%K pyrrolyl ring
%K Bifunctional Catalytic PropertiesReaction
%K polymerization reactions
%K H 3bptd ligand
%K titanium center
%K Sm
%K 1 equiv
%K Complexe
%K coordination number
%X Reaction of the bis-ligand-chelated samarium complex [Sm(Hbptd)(H2bptd)] (1; H3bptd =1,9-bis(2-pyrrolyl)-2,5,8-triazanona-1,8-diene), in which a pyrrolyl ring is dangling and metal-free, with Ti(NMe2)4 yielded the heterometallic complex [Sm(Hbptd)(THF)(bptd)Ti(NMe2)2] (2). Treatment of the H3bptd ligand with 1 equiv of Ti(NMe2)4 gave the titanium amido complex [Ti(bptd)(NMe2)] (3). Complexes 2 and 3 were able to catalyze the hydroamination of phenylacetylene with 2,4-dichloroaniline and 4-methoxyaniline, and high regioselectivities were observed for the two amines. Both 1 and 2 were active catalysts for the ring-opening polymerization of ε-caprolactone. 2 showed higher activity for the polymerization reactions, due to a decrease in the coordination number of the samarium atom (from 9 in 1 to 8 in 2) by sharing its ligand with the titanium center.
%I ACS Publications