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月 2022
Accepted
29 1月 2023
First published
30 1月 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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