A series of iminopyridyl Ni(II) and Pd(II) catalysts containing various bulky diarylmethyl or aryl substituents were synthesized and characterized. These catalysts possessing high catalytic activities and good thermal stability, are capable of producing hyperbranched ethylene oligomers in ethylene oligomerization. More importantly, hyperbranched polar functional ethylene oligomers with very high incorporations can be accessible from ethylene-MA co-oligomerization in the presence of iminopyridyl Pd(II) catalysts. In terms of catalysts, the remote  electronic substituents of bulky diarylmethyl or aryl moieties have a significant effect on the molecular weight and branching density of ethylene oligomers/ethylene-MA co-oligomers, as well as the incorporations of MA in ethylene (co)oligomerization.

Facile synthesis of hyperbranched ethylene oligomers and ethylene-MA co-oligomers

ACS Spring 2022

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