The site of ring cleavage in the ring-opening polymerization of low strained cycloolefins

Ruthenium‐based metathesis initiators: Development and use in ring‐opening metathesis polymerization

“…Apart from the educts, the metathesis reaction of d 8 ‐2‐butene with 2‐butene yielded only d 4 ‐2‐butene, so he could exclude the cleavage of any single bond 31. Three years later, Dall'Asta and Motroni could draw the same conclusion for ROMP by their copolymerization experiments using isotope‐labeled cycloolefins 22, 32…”

Catalytic Metathesis of Alkenes

“…Similar experiments with deuterated butene in the presence ofWC4-EtAICl z -EtOH showed that the same conclusion holds for homogeneous metathesis [133]. Later it was shown by analysis of the copolymer of [I-14C]cyclopentene and cyclooctene using WOCl 4 -Et 2 AICl z -(PhCOO)z as a catalyst that also in the case of cycloalkenes double-bond cleavage occurs [92]. Besides these crucial conclusions, experiments with labeled compounds gave further information on the reaction pathway.…”

Initiation at Snails Pace: Design and Applications of Latent Olefin Metathesis Catalysts Featuring Chelating Alkylidene Ligands

“…(1)) [7]. Mechanism of this industrially relevant reaction has been first studied in 1971 by Dall'Asta, who provided evidence for a cleavage of the double bond of the starting monomer during polymerization [8].…”