Question

A procedure calls for the slow addition of bromine to trans-cinnamic acid at a temperature of 50 °C. Select the likely consequence of adding the bromine all at once instead.

Answer 1

The har he following procedluxe hords for preparation 7 2,3 dibformo-2-phenylpropanoica from cinnamic acid. the cinnamic acid is soluble and this before addition of bromine it holds a colourlers solution. The colour of promine mi intensively red coloured. Here the addition reaction is relatinely fast an it is followed by progensinely disappearance of the red colour wheh bromine added at ohce. As it allows some of the Bromine to vapourize, and hence the yield obtained is reduced A rcoolt woll acetic acid Br trans-cinnamic a acid. Yield deduced C2,3 dibromo-3 phenyl propanoic acid)