| 摘要 |
The invention relates to a method for the ethenolysis of acyclic polyterpenes which comprise trisubstituted double bonds. The polyterpene is reacted with a catalyst complex [(NHC)(NHCewg)MeX2(CHPh)] and [(NHC)(NHCeWg)MeX2(3-phenylindenylid-1-ene)] in the presence of ethene. NHC and NHCewg are N-heterocyclic carbene ligands, where NHC is at least as rich in electrons as NHCewg, Me is Ru, Os or W, and X is selected from F, Cl, Br, I, CN, SCN, OCN, and NCO. The polyterpene is particularly advantageously selected from natural rubber, liquid natural rubber and squalene, or from vulcanized rubber, selected from used tires, used tire granules and powdered rubber. The invention provides, for the first time, decomposition products of the polyterpenes natural rubber, liquid natural rubber, squalene and vulcanized rubber, which can be produced with the aid of the method according to the invention. |
