Terpolymerisation of 1-olefin and ethene with CO catalysed by the [PdCl2(dppp)] complex in methanol as a solvent [dppp = 1,3-bis(diphenylphosphino)propane]

The catalytic activity of the [PdCl2(dppp)] complex in the 1-olefin/ethene (E)/CO terpolymerisation has been studied in MeOH (containing 1000 ppm of H2O) as a solvent. The 1-olefins tested were propene (P), 1-hexene (Hex), 1-decene (D) and styrene (S). At 90 °C and 45 atm (E/CO = 1/1), the system [PdCl2(dppp)]/TsOH (p-toluenesulfonic acid) = 1/8 catalyses efficiently the reactions leading to 5000 g PECO/(g Pd h), 5600 g HexECO/(g Pd h), 5650 g DECO/(g Pd h) and 4100 g SECO/(g Pd h). In particular, it has been studied deeper the effect of Hex and S concentrations on productivities, average molecular weights and melting temperatures of HexECO and SECO, respectively. A mechanism of reaction has been also proposed and discussed, supported by IR, and NMR characterizations.

Graphical abstractThe catalytic system [PdCl2(dppp)]/TsOH (1/8) catalyses the terpolymerisation of propene (P), 1-hexene (Hex), 1-decene (D) and styrene (S) with ethene (E) and CO, in methanol (H2O = 1000 ppm) as a solvent. At 90 °C and 45 atm (E/CO = 1/1), the best productivity were 5000 g PECO/(g Pd h), 5600 g HexECO/(g Pd h), 5650 g DECO/(g Pd h), and 4100 g SECO/(g Pd h). It has been studied the effect of olefin concentration on the productivity, average molecular weight and melting temperature and a mechanism of reaction has been proposed and discussed.Figure optionsDownload full-size imageDownload as PowerPoint slide