Synthesis and characterization of Ge- and Sn-containing ADMET polymers

A series of dienes containing the germanium and tin moiety were synthesized and their acyclic diene metathesis (ADMET) polymerization was investigated in the presence of electrochemically reduced tungsten-based catalyst system. All monomer and polymer structures were characterized by 1H and 13C NMR spectroscopy. Average molecular weights are determined by GPC. Glass transition temperatures of polymers were determined by DSC. The results in this work are comparing with those obtained by the other catalyst systems.

The catalytic activity of the electrochemically generated tungsten-based catalyst was tested in the acyclic diene metathesis (ADMET) polymerization of Ge- and Sn-containing monomers. The WCl6-e−-Al-CH2Cl2 catalyst system produced various unsaturated polymers containing Ge and Sn with high trans content, exhibiting similar stereochemical characteristics seen in the previous ADMET systems. Figure optionsDownload as PowerPoint slide