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We synthesized and analyzed by 1H NMR the mixture of meso (m) and racemic (r) 1,2,4,5-tetrachloropentane, as well as the mixture of mm, mr, and rr isomers of 1,2,4,6,7-pentachloroheptane and its precursor 1,2,6,7-tetrachloroheptane-4-ol as models for PVC 1,2-dichloroethyl end group. We were able to correct previous assignments as well as extend the 1H-NMR analysis of this end group in PVC to the triad level.
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George M. Benedikt (1992) studied this question.
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