pH-Responsive Ruthenium-Based Olefin Metathesis Catalysts: Controlled Ring-Opening Metathesis Polymerization in Alcoholic and Aqueous Media upon Acid Addition

Authors

Miles A. Dunbar, University of Southern Mississippi
Shawna L. Balof, University of Southern MississippiFollow
Adam N. Roberts, University of Southern MississippiFollow
Edward J. Valente, University of Portland
Hans-Jörg Schanz, University of Southern Mississippi

Document Type

Article

Publication Date

1-24-2011

Department

Chemistry and Biochemistry

School

Mathematics and Natural Sciences

Abstract

The new hexacoordinate catalysts (PCy₃)(DMAP)₂Cl₂Ru═CH(p-C₆H₄)CH₂NMe₂ (7) and (PCy₃)(DMAP)₂Cl₂Ru═CH(p-C₆H₄)N(CH₃)₂ (8) have been synthesized via exchange of a PCy₃ ligand for two DMAP ligands from their (PCy₃)₂Ru precursors 4 and 5 in a one-step reaction in high yield. The catalysts promoted controlled ROMP of two cationic exo-7-oxanorbornene derivatives under homogeneous conditions in various acidic protic media, including acidic aqueous media. Very low polydispersities were accomplished in TFE/0.1 M HCl_aq. (1:1 v/v) with PDIs as low as 1.05.

Publication Title

Organometallics

Volume

30

Issue

2

First Page

199

Last Page

203

Recommended Citation

Dunbar, M. A., Balof, S. L., Roberts, A. N., Valente, E. J., Schanz, H. (2011). pH-Responsive Ruthenium-Based Olefin Metathesis Catalysts: Controlled Ring-Opening Metathesis Polymerization in Alcoholic and Aqueous Media upon Acid Addition. Organometallics, 30(2), 199-203.
Available at: https://aquila.usm.edu/fac_pubs/8878