%0 Generic
%A Onishi, Naoya
%A Shiotsuki, Masashi
%A Sanda, Fumio
%A Masuda, Toshio
%D 2009
%T Polymerization of Phenylacetylenes with Rhodium Zwitterionic Complexes: Enhanced Catalytic Activity by π-Acidic Diene Ligands
%U https://acs.figshare.com/articles/dataset/Polymerization_of_Phenylacetylenes_with_Rhodium_Zwitterionic_Complexes_Enhanced_Catalytic_Activity_by_Acidic_Diene_Ligands/2848303
%R 10.1021/ma900293t.s003
%2 https://acs.figshare.com/ndownloader/files/4546042
%K zwitterionic Rh catalysts
%K weight polymer
%K polymerization
%K nbd analogue
%K Enhanced Catalytic Activity
%K polymethylated tfb ligands
%K phenylacetylene derivatives
%K methyl groups
%K catalyst 1
%K Rhodium Zwitterionic Complexes
%X Zwitterionic Rh catalysts bearing a series of tetrafluorobenzobarrelene (tfb) ligands proved to be highly active in the polymerization of phenylacetylenes. The highest catalytic activity for the polymerization of phenylacetylene was observed with (tfb)Rh+[(η6-Ph)B−Ph3] (1). Catalyst 1 displayed higher activity to produce higher molecular weight polymer than the conventional nbd analogue, (nbd)Rh+[(η6-Ph)B−Ph3] (5, nbd = 2,5-norbornadiene). In the case of other zwitterionic Rh catalysts bearing polymethylated tfb ligands [tfb-Me2, 2; tfb-Me3, 3; tfb-Me4, 4], the catalytic activity tended to decrease with increasing number of the incorporated methyl groups. Catalyst 1 also showed high activity in the polymerization of phenylacetylene derivatives irrespective of electron-donating or -withdrawing nature of ring-substituents of the monomers.
%I ACS Publications