RUTHENIUM COMPLEXES, PROCESS FOR PREPARATION THEREOF, AND PROCESSES FOR PRODUCING OPEN-RING POLYMERS OF CYCLOOLEFINS AND HYDROGENATION PRODUCTS THEREOF BY USING THE COMPLEXES AS CATALYST

摘要

The invention relates to ruthenium complexes wherein a heteroatom−containing carbene compound having a six−membered ring structure is bonded to ruthenium and a process for the preparation thereof; a process for producing open−ring polymers of cycloolefins by subjecting a cycloolefin to ring−opening metathesis polymerization in the presence of such a ruthenium complex; and a process for producing hydrogenated open−ring polymers of cycloolefins by hydrogenating the carbon−carbon double bonds of the above open−ring polymers. The invention gives hydrogenated open−ring polymers having physical properties different from those of hydrogenated open−ring polymers of the prior art. Particularly, the use of dicyclopentadiene can give a hydrogenated open−ring polymer excellent in heat resistance, and this polymer can be advantageously used as members or moldings for medical appliances or electrical components.