Pd complex-promoted cyclopolymerization of functionalized alpha,omega-dienes and copolymerization with ethylene to afford polymers with cyclic repeating units.
The Pd(II)-diimine catalysts initiate cyclopolymerization of isopropylidene diallylmalonate (I) to produce the polymer containing trans-1,2-disubstituted cyclopentane groups. Use of Pd complexes with a C2-symmetric ligand afforded the polymer with highly regulated tacticity. The polymerization of isopropylidene diallylmalonate in ethylene atmosphere gives the polyethylene with up to 42% comonomer incorporation.
Park
Sehoon
S
Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama 226-8503, Japan.
Takeuchi
Daisuke
D
Osakada
Kohtaro
K