Pyramlyl palladium(Il) complexes as phenylacetylene oligomerization and polymerization catalysts'

Abstract

PyrazoM compounds have been extensively used to prepare metal complexes, but it is only recently that they have been investigated as catalysts for the polymerization of unsaturated hydrocarbons. In catalyzn11g the polymerization of ethylene, the electrophilicity of the metal centre plays an important role since the key step in the polymerization is coordination of the ethylene. A similar facile coordination would be expected for acetylene and one would therefore expect pyrazolyl palladium complexes to be good catalysts for the transformation of acetylenes. This thesis is an investigation of pyrazolyl palladium complexes as catalysts for the polymerization and oligomeruation of substituted acetylenes.