Chen, Zhi-Hao; Daugulis, Olafs; Brookhart, Maurice

DOI:

Abstract

A well-defined Pd complex [(tBuXPhos)Pd(Me)(BArf)] bearing a bulky monophosphine ligand was synthesized and fully characterized. X-ray diffraction anal. 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 Me ether, propargyl alc., benzyl acetylene, and Ph acetylene to yield polymers with Mn values at 5-15 kDa with monomodal mol. weight distributions between ∼1.4 and 2.1.

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