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The ruthenium(II)-N-heterocyclic carbene complex, [RuCl 2 (1-butyl-3-methylimidazol-2-ylidene)(p-cymene)] selectively catalyzes oligomerization of phenylacetylene (PA) and its derivatives to linear oligomers, containing positively charged imidazolium end-group and uncharged ones. The charged oligomer chain consists of maximum 9–11 PA monomer units after 36h reaction at 80°C whereas mainly...
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