N-bromo-poly(styrene-co-divinylbenzene) sulphonamide metal salts. Synthesis and basic properties

Macromolecular pendant group N-monobromosulphonamide metal salts ? SO₂NBr^?M⁺ having a macroporous styrene-divinylbenzene matrix structure have been obtained by two methods: (a) by the action of aqueous metal hypobromites on the appropriate macromolecular pendant group sulphonamide, and (b) by the action of an aqueous metal bromide on the appropriate macromolecular N-chlorosulphonamide metal salt. In each case the sodium salt product was obtained with a 100% functional yield and it contained 2.1 mmol.g^?1 ? SO₂NBr^?Na⁺ groups, i. e., 4.2 meq · g^?1 of active bromine. The stability of the resin was investigated in the range 20–100°C in the dry state as well as in aqueous media. A thermoanalysis (TG, DTG, and DTA curves) was carried out up to 1000°C and its course was interpreted. The resin has brominating, oxidative, microbiocidic, and ionexchanging properties. It reacts in a reversible way: after the loss of the active bromine, it can be reactivated again.