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acetonitrile acetoxymerouri acid addition alcoholic solution Anal aoetate benzyl alcohols Butadiene l.62 g butane butyl alcohol calcium chloride Calod carbon tetra cold ether corresponding crop crystalline crystals cyanide cyolopentadiene decolorized derivatives diastereoisomers diene diethoxybutane dilute dioxan distilled dried in air ether and dried ethoxy ethylene evaporated under reduced filtered with suction filtrate was evaporated hot ethyl alcohol ice-bath iodine isolated isomer isoprene isopropyl alcohol l,4-diiodo-2,3-diethoxybutane material weighed melt below 200 melted with decomposition mercuric acetate merouration product merouration reaction merourstion meso and racemio meso diiodide meso isomer methanol mole molecule n-propyl obtained ohloroprene olefins orop piperylene potassium iodide precipitate was filtered precipitate which formed product was filtered purified meso racemic reaction mixture reagents reduced pressure refluxed reorystallized residual solution room temperature sodium bisulfite sodium chloride solution was filtered steam-bath tertiary butyl alcohol theoretical unsuccessful attempt various alcohols washed with cold washed with ether yield