The arylpropargyl-ether-terminated monomer (1,4-HC::::x---CCH2OCrH4)2CMe2 was polymerized to just before the gel point in the presence of various catalysts. Changes in the IH n.m.r, spectra show that (a) (r/-Cp)Co(CO)2 gives rise exclusively to acetylene cyclotrimerization, (b) (r/-Cp)2Ni and (PPh3)2NiCI 2 each result in both cyclotrimerization and non-aromatic polyene formation, and (c) (PPh3)3RhCI gives branched eneyne dimers.
Посилання на статтю:
Cyelotrimerization versus non-aromatic polyene formation in catalysed cure of an arylpropargyl-ether-terminated monomer / W. E. Douglas* and A. S. Overand // Polymer. – 1993. – Vol 34. – P. 1544-1545.