STRUCTURAL DIFFERENCES OF POLY(ALPHA-ETHYNYLNAPHTHALENE)S OBTAINED WITH [RH(NORBORNADIENE)CL](2) AND WCL6 CATALYSTS - AN ELECTRON SPIN RESONANCE AND RAMAN

摘要

Poly(alpha-ethynylnaphthalene)s were prepared using [Rh(norbornadiene)Cl](2) complex (a stereoregular polymerization catalyst) in triethylamine or alcohol, and WCl6 (a metathesis catalyst) in toluene. H-1 nuclear magnetic resonance, electron spin resonance and laser Raman spectra of both polymers were measured in order to assign the geometrical structures with respect to the C=C bond in the main chain. Based on these spectral data, it was concluded that the clear spectra differences observed between the two polymers could be explained in terms of geometrical differences, i.e. the Rh complex and WCl6 catalysts produce polyacetylenes involving cis-cisoid and hans-transoid sequences, respectively. Copyright (C) 1996 Elsevier Science Ltd. [References: 22]