Abstract:
Penta- and hexa-coordinated, bridged ruthenium and osmium catalysts of the formula wherein Me is ruthenium or osmium; L1 and L2 are neutral ligands having electron donor properties; X is an anionic ligand; Y is oxygen or sulphur; A is a direct bond, C1-C4alkylene or C2-C4alkylidene; Z is a direct bond, oxygen, sulphur or the groups wherein R1 and R2 are hydrogen or hydrocarbon radicals; their preparation and their us in the synthesis of polymers, in the ring-closure metathesis of diolefins, in the cross metathesis of olefins and in the isomerisation of olefins are disclosed.
Abstract:
Composition comprising (a) catalytic amounts of a one-component catalyst for metathesis polymerization and (b) at least one polymer with strained cycloalkenylene radicals bonded to the polymer backbone via a divalent bridge group, alone or as a mixture with strained cycloolefins. The composition can be polymerized thermally or photochemically by metathesis polymerization and is suitable for the production of shaped articles, coatings and relief images. The polymers (b) are likewise claimed.
Abstract:
A solventless polymerizable composition comprising (a) at least one strained cycloolefin that is liquid or is meltable without decomposition, and (b) a catalytic amount of at least one compound of formula I or Ia or a mixture of compounds of formula I and Ia wherein Me is ruthenium or osmium; T1 and T2 are each independently of the other a tertiary phosphine or T1 and T2 together form a ditertiary diphosphine; T3 is hydrogen, C1-C12alkyl; C3-C8cycloalkyl, C3-C7heterocycloalkyl having one or two hetero atoms selected from the group —O—, —S— and —N—, C6-C14aryl, or C4-C15heteroaryl having from one to three hetero atoms selected from the group —O—, —S— and —N—, which are unsubstituted or substituted by C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy, C6-C10aryl, C6-C10aryloxy, —NO2 or by halogen; T4 is C6-C16arene or C4-C15heteroarene each of which is unsubstituted or substituted by from one to three C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy, —OH, F, Cl or Br substituents, and X01 and X02 are each independently of the other halogen. The compositions are suitable for the production of mouldings and coatings.