Issue 9, 2023

Initiating abilities of diphosphine- and diamine-ligated Pd complexes/NaBPh4 systems for C1 polymerization of diazoacetates

Abstract

A series of well-defined Pd complexes bearing diphosphines or diamines and a dichloroquinone-derived unit as ligands were newly prepared and their initiating abilities in conjunction with NaBPh4 for the C1 polymerization of diazoacetates were investigated. Among the (diphosphine)Pd(II)Cl(Cl-quinonyl) complexes examined here, square planar cis (diphosphine: diphenylphosphinoferrocene) and distorted square planar trans (diphosphine: xantphos) complexes with NaBPh4 yielded highly syndiotactic polymers from ethyl diazoacetate despite low polymer yields. A series of Pd(0) complexes bearing a bidentate diamine such as N,N,N′,N′-tetramethyl-1,3-propanediamine and 2,3-dichloronaphthoquinone in conjunction with NaBPh4 polymerized diazoacetates to afford moderately syndiotactic polymers in moderate yields, indicating that the (diamine)Pd(0)(dichloroquinone) framework could be a promising general platform for an initiating system with high activity and stereoselectivity for the C1 polymerization of diazoacetates.

Graphical abstract: Initiating abilities of diphosphine- and diamine-ligated Pd complexes/NaBPh4 systems for C1 polymerization of diazoacetates

Supplementary files

Article information

Article type
Paper
Submitted
10 12 2022
Accepted
29 1 2023
First published
30 1 2023
This article is Open Access
Creative Commons BY-NC license

Polym. Chem., 2023,14, 1007-1018

Initiating abilities of diphosphine- and diamine-ligated Pd complexes/NaBPh4 systems for C1 polymerization of diazoacetates

H. Shimomoto, Y. Miyano, K. Kinoshita, T. Itoh and E. Ihara, Polym. Chem., 2023, 14, 1007 DOI: 10.1039/D2PY01548J

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