Polymerization of Terminal Acetylenes by a Bulky Monophosphine-Palladium Catalyst

A well-defined palladium complex [(tBuXPhos)­Pd­(Me)­(BArf)] bearing a bulky monophosphine ligand was synthesized and fully characterized. X-ray diffraction analysis shows that the 1,3,5-triisopropylaryl group of the dialkylbiaryl phosphine ligand exhibits a weak η6-interaction with the Pd­(II) cent...

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Bibliographic Details
Published in:Organometallics 2023-02, Vol.42 (3), p.235-239
Main Authors: Chen, Zhi-Hao, Daugulis, Olafs, Brookhart, Maurice
Format: Article
Language:English
Subjects:
alkynes
catalysis
catalysts
hydrocarbons
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
palladium
polymerization
polymers
propargyls
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Summary:A well-defined palladium complex [(tBuXPhos)­Pd­(Me)­(BArf)] bearing a bulky monophosphine ligand was synthesized and fully characterized. X-ray diffraction analysis shows that the 1,3,5-triisopropylaryl group of the dialkylbiaryl phosphine ligand exhibits a weak η6-interaction with the Pd­(II) center. This catalyst exhibits excellent functional group tolerance and polymerizes propargyl esters containing benzoyl and acetyl groups, propargyl methyl ether, propargyl alcohol, benzyl acetylene, and phenyl acetylene to yield polymers with M n values in the range of 5–15 kDa with monomodal molecular weight distributions between ca. 1.4 and 2.1.
ISSN:0276-7333
1520-6041
DOI:10.1021/acs.organomet.2c00561