 While the concept of ADMET had been discussed in the scientific literature since the 1970s, the first successful ADMET polymerization was reported in 1991.In this report, 1,5-hexadiene and 1,9-decadiene were polymerized to 1,4-polybutadiene and poly(octenylene), respectively.The polybutadiene had a weight average molar mass (Mw) of 28,000 with over 70% trans double bonds.