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

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. 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. L'invention concerne des complexes de ruthénium, dans lesquels un composé de carbène renfermant un hétéroatome, à structure en anneau à six éléments est lié au ruthénium, et un procédé de préparation associé. Cette invention a également trait à un procédé de production de polymères à anneau ouvert de cyclooléfines consistant à soumettre une cyclooléfine à une polymérisation de métathèse à anneau ouvert en présence d'un tel complexe de ruthénium, et un procédé de production de polymères à anneau ouvert hydrogénés de cyclooléfines reposant sur l'hydrogénation des liaisons doubles carbone-carbone des polymères à anneau ouvert susmentionnés. Ladite invention a aussi pour ob