[1B11-14] Polymer, oligomer 2

[1B13] Synthesis of (arylimido)niobium(V)-alkylidene complexes as olefin metathesis catalysts

○Kanchana Chatchaipaiboon¹, Itsuki Izawa¹, Kotohiro Nomura¹ (1. Tokyo Metropolitan University, Department of Chemistry)

In this lecture, we wish to present our explored results for synthesis of a series of niobium(V)-alkylidene complexes and their use as olefin metathesis polymerization catalysts. In particular, living polymerization of internal alkynes has beend demonstrated for the first time by using V(CHSiMe₃)(NAr)[OC(CF₃)₃](PMe₃)₂ even at 80 C. More results for synthesis of a series of alkylidene complexes and the catalytic ring-opening metathesis polymerization of cyclic olefins will be introduced in the symposium.