Journal
INORGANIC CHEMISTRY FRONTIERS
Volume 4, Issue 5, Pages 795-800Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6qi00562d
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Funding
- National Natural Science Foundation of China (NSFC) [21374108, 51522306, 21960071]
- Anhui Provincial Natural Science Foundation [1608085MB29]
- Fundamental Research Funds for the Central Universities [WK3450000001]
- Recruitment Program of Global Experts
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Two palladium complexes (NHC) Pd(allyl) Cl (NHC = 1,3-Ar-2-naphthoquinimidazolylidene, Ar = 2,6-Me-2-C6H3, 2,6-Pr-i(2)-C6H3) bearing a redox-active naphthoquinone moiety, were prepared and characterized. Electro-chemistry cyclic voltammetry and NMR studies showed that these palladium complexes could be easily reduced and re-oxidized using CoCp2 and [FeCp2][BAF] (BAF = tetrakis(3,5-bis(trifluoromethyl) phenyl) borate) reagents. The properties of these neutral and reduced palladium complexes in norbornene, 5-norbornene-2-yl acetate and 1-chloro-1-octyne polymerization were studied. The neutral complexes were active in all of these polymerization reactions in the presence of Na[BAF]. In contrast, the reduced analogues showed very low activity under the same conditions. As such, switchable polymerization could be realized in this catalytic system.
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