Royal Society of Chemistry, Chemical Communications, 17(46), p. 2965
DOI: 10.1039/b924091h
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Calculation of the free energy profile for 1,4 butadiene polymerisation catalyzed by [Cp*ScR](+) highlights the kinetic preference for cis-1,4 over trans-1,4 insertions. The main differences between cis and trans configuration rely on the thermodynamics and the geometry of the precursor diene adduct.