“…Thus, ROMP of sterically hindered cis,cis-1,5-dimethyl-cycloocta-1,5-diene (1,5-DM-COD) to polyisoprene by well-defined ruthenium alkylidene catalyst has recently been reported [7]. The polymerizabilty via ROMP of COD having methyl, ethyl and chloro-groups has also been published [8][9][10][11]. The preparation of substituted polyalkenamers and telomers with well-defined end groups (telechelic polymers) has attracted much attention.…”