Open AccessSynthesis of Cationic Pd(II) Complexes with 5-Membered Ring Chelating Iminoylcarbene Ligand and Its Catalytic Activity on Norbornene Polymerization
Author(s) -
Roushown Ali,
Jubaraj Chandra,
Tariqul Hasan
Publication year - 2019
Publication title -
asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2019.21645
Subject(s) - norbornene , cationic polymerization , chemistry , polymerization , polymer chemistry , ligand (biochemistry) , palladium , crystal structure , chelation , ring opening polymerization , transmetalation , catalysis , polymer , crystallography , organic chemistry , biochemistry , receptor
Iminoyl N-heterocyclic carbine ligand with cationic allyl Pd(II) complex (3) was successfullysynthesized by transmetallation of corresponding Ag complex with one equivalent of[Pd(allyl)(COD)]+SbF6–. A slightly distorted square planer structure of the Pd(II) complex 3 was confirmed by single crystal X-ray diffraction analysis. The Pd(II) complex 3 is stable in air and found to show moderate activity in the polymerization of norbornene without any activator. The polynorbornene produced with Pd(II) complex 3 was obtained to be stable up to 440 °C. The 1H and 13C NMR spectra of the polymer indicated addition polymerization of norbornene and the presence of the vinylene group at the end of polymer chain.
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