How important are impurities in catalysis? An example from ring-closing metathesis

Christa Lübbe, Andreas Dumrath, Helfried Neumann, Marion Schäffer, Ralf Zimmermann, Matthias Beller, Renat Kadyrov

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


The dramatic effect of substrate impurities on the performance of a specific ruthenium catalyst system is demonstrated in the benchmark metathesis reaction of diethyl diallylmalonate. Based on detailed two-dimensional GC-time-of-flight MS measurements, the significant influence of small amounts of different contaminations, especially various organic halides, is shown. This work serves as an incisive example of the importance of impurities to catalyst performance, also in homogeneous catalysis, which is often ignored in academic research. Pure or not pure, that is the question: The presence of small amounts of impurities has a dramatic influence on the reactivity and selectivity of a novel ruthenium-based ring-closing metathesis (RCM) catalyst.

Original languageEnglish
Pages (from-to)684-688
Number of pages5
Issue number3
StatePublished - Mar 2014
Externally publishedYes


  • homogenous catalysis
  • metathesis
  • ruthenium


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