Ruthenium and osmium catalysts

Abstract

Disclosed is a compound of formula (I), and its use in preparing metathesis polymers of dicyclopentadiene and/or other strained cycloolefins in which Me is ruthenium or osmium; X1 and X2 independently of one another are anionic ligands, or X1 and X2 together are a bis-anionic ligand; Y is oxygen, sulfur or the groups —NR7— or —PR7—, where R7 is hydrogen or a substituent selected from the group C1-C6alkyl, C6-C13aralkyl, sulfonyl and —C(═O)Rs2 and Rs2 is hydrogen or a substituent selected from the group C1-C12alkyl, C2-C12alkenyl, C3-C12cycloalkyl, C3-C12cycloalkenyl, C2-C11heterocycloalkyl, C2-C11heterocycloalkenyl, C5-C12aryl, C1-C9heteroaryl, C6-C14aralkyl, C2-C13heteroaralkyl, C6-C14aralkenyl and C3-C13heteroaralkenyl; n is 0 or 1; L1 is tertiary phosphine; and L2 is a neutral e− donor ligand which is coordinated to the metal atom and is attached via the bridge group C* to the carbon atom of the carbene group if n is 0 and to Y if n is 1.

Dependencies are inferred from the claim text.