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Highly Defined ABC Triblock Cooligomers and Copolymers Prepared by ROMP Using an N‐Heterocyclic‐Carbene‐Substituted Ruthenium Benzylidene Initiator
Authors:Christian Slugovc  Silvia Riegler  Gertraud Hayn  Robert Saf  Franz Stelzer
Abstract:The “3rd generation Grubbs” initiator (H2IMes)(3‐bromopyridine)2(Cl)2Ru?CHPh ( 1 ) accomplishes the synthesis of ABC triblock copolymers via living ring‐opening metathesis polymerisation (ROMP) of norbornene derivatives. Complete initiation and an outstanding tolerance of functional groups are provided, which is proven by a combined study by means of matrix‐assisted laser desorption/ionisation mass spectrometry, gel permeation chromatography and NMR spectroscopy on an ABC triblock cooligomer.
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Gel permeation chromatograms of oligo A , oligo AB , and oligo ABC .

Keywords:block copolymers  living polymerization  MALDI  ROMP
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