Summary:Cupric chloride reacts with gaseous and liquid olefins to form dichloroparaffins in various solvents under milder conditions. Acetic acid containing sodium acetate is the most convenient solvent for the reaction at lower temperatures. The reacting species in this system is found to be CuCl.OAc. NaCl. Acetonitrile containing lithium chloride and various alcohols can also be used as the solvent.Application of the reaction to butadiene in acetic acid containing sodium acetate has resulted in the formation of 1, 4-diacetoxy-2-butene and 3, 4-diacetoxy-1-butene.The kinetics of chlorination of styrene has been studied in acetonitrile-lithium chloride and in n-propyl alcohol. On the basis of the rate equation and the structure of the products, the chlorination mechanism and the retarding effect of cuprous chloride are discussed.
Bei der Chlorierung von Olefinen in Essigsäure in Gegenwart von CuCl2 wirkt der Zusatz von NaCl beschleunigend, allerdings nimmt auch die Ausbeute an Nebenprodukten erheblich zu.
Es wird die Umsetzung von Olefinen wie Äthylen, Propylen, Isobutylen, Cyclohexen, 1‐Octen, 2‐Octen oder Styrol in gasförmiger und flüssiger Phase mit Kupfer(II)‐chlorid zu den entsprechenden Dichlorparaffinen untersucht.
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