Unformatted text preview: very low concentration of molecular bromine (Tedder et al.). The substitution is best carried out by boiling zV-bromosuccinimide with the olefine in carbon tetrachloride. Succinimide crystallises out from the carbon tetrachloride on cooling whereas the brominated product remains dissolved in the carbon tetrachloride. Required: Ethyl crotonate, 22-8 g.; A-bromosuccinimide, 35-6 g.; carbon tetrachloride, 40 ml. Dissolve 22-8 g. of ethyl crotonate in 40 ml. of dry carbon tetrachloride and add 35 -6 g. of A r-bromosuccinimide.* Heat the mixture under reflux for three hours. Cool to o° and filter off the succinimide which is insoluble in cold carbon tetrachloride. Now shake the filtrate with water in a separating funnel, separate and dry the carbon tetrachloride layer with sodium sulphate. Filter through a fluted filter-paper into a Claisen flask and distil *Add o-2 g. of benzoyl peroxide to accelerate reaction....
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This note was uploaded on 09/19/2011 for the course CHM 2211 taught by Professor Castalleano during the Fall '06 term at University of Florida.
- Fall '06
- Organic chemistry