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The 1,2,3-trithiolan of endo-dicyclopentadiene, C10H12S3 (1) can be polymerized to give low molecular weight polymers (C10H12S3)n, n = 3–6, by heating or by exposure to UV irradiation. The polymers differ according to the method of polymerization as revealed by their n.m.r. spectra. Depolymerization of both types of polymer can be achieved by heating with amines, and especially with R3N. Desulphurization of (1) by Na2SO3 or triphenylphosphine produces a polymer of composition (C10H12S2)n, n= ca 18–19. The depolymerization of this material by Et3N regenerated some (1).
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Emsley et al. (1980) studied this question.
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