%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