| 摘要 |
Disclosed is a compound of formula (I), and its use in preparing metathesis polymers of dicyclopentadiene and/or other strained cycloolefinsin whichMe 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. |
