Aqueous bromine, photochemical

P5-8b In order to study the photochemical decay of aqueous bromine in bright sunlight, a small quantity of liquid bromine was dissolved in water contained in a glass battery jar and placed in direct sunlight. The following data were obtained ... 

Pal A. Photochemical dissolution of gold nanoparticles by bromine containing trihalo-methanes (THMs) in an aqueous triton X-100 medium and its analytical application. J Photo chem Photobiol Chem 2001 142 59-65. 

Decarboxylation.—Direct decarboxylation of hindered geminal diesters has been achieved using amine bases (DBN Dabco). This attractive one step process generally gives good yields and avoids the use of both acidic and aqueous conditions. An improved method for the oxidative decarboxylation of vicinal diacids to olefins employs copper(i) oxide and 2,2 -dipyridyl in quinoline temperatures of 180 °C are however required. Excellent yields have been achieved in the decarboxylation of bridgehead carboxylic acids by sequential bromination and photochemical reduction in the presence of tri-n-butyltin hydride. 

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