hydroxide dinickel complexes with the new P4-Ph ligand supports the much
stronger chelating ability and that it appears to favor closed-mode bimetallic
complexes.
We are about to start hydroformylation studies using the dirhodium
bis-norbornadiene catalyst precursor based on the new rac-et,ph-P4-Ph ligand.
This new more strongly chelated catalyst should be dramatically more resistant to
deactivating fragmentation reactions for the highly active dicationic catalyst. These
studies will be reported in due course.
Acknowledgments This research has been supported over the years by NSF, the Louisiana Board
of Regents through their Industrial Ties programs, and the following companies: Hoechst
Celanese, Arco Chemical, Albemarle, Ferro, Eastman Chemical, Sasol North America, and current
funding from Dow Chemical. Additionally, the team leader had excellent discussions and interactions with hydroformylation experts at Union Carbide (now Dow), ExxonMobil, and Shell
Chemical.
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